Q JEE MAIN 2021

Given below are two statements : Statement-I : α and β forms of sulphur can change reversibly between themselves with...

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Q JEE MAIN_2026

Find the correct statements related to group 15 hydrides. A. Reducing nature increases from $\mathrm{NH}_3$ to $\mathrm{BiH}_3$ B. Tendency to...

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Q JEE MAIN_2026

Given below are two statements: Statement I: Aluminium is more electropositive than thallium as the standard electrode potential value of...

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Q JEE MAIN_2026

Correct statements from the following are: A. Nitrogen in oxidation states from +1 to +4 disproportionates in acid medium. B....

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Q JEE MAIN_2026

Given below are two statements: Statement 1 : The covalency of oxygen is generally two but it can exceed upto...

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Q JEE MAIN 2026

Regarding the hydrides of group 15 elements $\mathrm{EH}_3(\mathrm{E}=\mathrm{N}, \mathrm{P}, \mathrm{As}, \mathrm{Sb})$, select the correct statement from the following: A. The...

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Q JEE MAIN_2026

Given below are two statements : Statement I : The increasing order of boiling point of hydrogen halides is $\mathrm{HCl}

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Q JEE MAIN 2026

Choose the INCORRECT statement

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Q JEE MAIN 2026

Which statements are NOT TRUE about $\mathrm{XeO}_2 \mathrm{~F}_2$ ? A. It has a see-saw shape. B. Xe has 5 electron...

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Q JEE MAIN 2026

The correct statements from the following are : A. Ionic radii of trivalent cations of group 13 elements decreases down...

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Q JEE MAIN 2026

Two p -block elements X and Y form fluorides of the type $\mathrm{EF}_3$. The fluoride compound $\mathrm{XF}_3$ is a Lewis...

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Q JEE MAIN 2026

Given below are two statements : Statement I: Elements ' $X$ ' and ' $Y$ ' are the most and...

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Q JEE MAIN 2026

Given below are two statements: Statement I: The halogen that makes longest bond with hydrogen in HX, has the smallest...

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Q JEE MAIN 2026

A 'p'-block element $(\mathrm{E})$ and hydrogen form a binary cation $\left(\mathrm{EH}_{\mathrm{x}}\right)^{+}$, while $\mathrm{EH}_3$ on treatment with $\mathrm{K}_2 \mathrm{HgI}_4$ in alkaline...

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Q JEE MAIN_2026

Given below are two statements : Statement I: The number of pairs among $\left[\mathrm{SiO}_2, \mathrm{CO}_2\right],\left[\mathrm{SnO}, \mathrm{SnO} \mathrm{O}_2\right],\left[\mathrm{PbO}, \mathrm{PbO}_2\right]$ and $...

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Q JEE MAIN 2019

The correct statement among the following is

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Q JEE MAIN 2019

The basic structural unit of feldspar, zeolites, mica, and asbestos is

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Q JEE MAIN 2019

An organic compound ' A ' is oxidized with $\mathrm{Na}_2 \mathrm{O}_2$ followed by boiling with $\mathrm{HNO}_3$. The resultant solution is...

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Q JEE MAIN 2020

On heating compound (A) gives a gas (B) which is a constituent of air. This gas when treated with H2...

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Q JEE MAIN 2019

Which of the given statements is INCORRECT about glycogen?

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Q JEE MAIN 2019

$$ \text { The correct order of the oxidation states of nitrogen in NO, N2O, NO2, and N2O3 is }...

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Q JEE-MAIN 2019

The increasing order of reactivity of the following compounds towards reaction with alkyl halides directly is

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Q JEE MAIN 2019

The C–C bond length is maximum in :

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Q JEE MAIN 2019

The major product obtained in the following reaction is

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Q JEE MAIN 2019

The tests performed on compound X and their inferences are : Test Inference (a) 2,4-DNP test Coloured precipitate (b) Iodoform...

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Q JEE MAIN 2020

The correct statement with respect to dinitrogen is

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Q JEE MAIN 2020

Reaction of an inorganic sulphite X with dilute $\mathrm{H}_2 \mathrm{SO}_4$ generates compound Y . Reaction of Y with NaOH gives...

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Q JEE MAIN 2020

$$ \text { The reaction of } \mathrm{NO} \text { with } \mathrm{N}_2 \mathrm{O}_4 \text { at } 250 \mathrm{~K}...

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Q JEE MAIN 2020

The compound that cannot act both as oxidising and reducing agent is

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Q JEE MAIN 2020

The major product Z obtained in the following reaction scheme is

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Q JEE MAIN 2019

The chloride that CANNOT get hydrolysed is:

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Q JEE-MAIN 2020

The final major product of the following reaction is

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Q JEE MAIN 2019

Which of the following is NOT a correct method of the preparation of benzylamine from cyanobenzene?

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Q JEE MAIN 2019

The noble gas that does NOT occur in the atmosphere is :

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Q JEE MAIN 2019

The major product ‘Y’ in the following reaction is :

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Q JEE MAIN 2020

On heating, lead (II) nitrate gives a brown gas (A). The gas (A) on cooling changes to a colourless solid/liquid...

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Q JEE MAIN 2019

The hydride that is NOT electron deficient is

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Q JEE MAIN 2020

In the following reaction sequence, [C] is

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Q JEE MAIN 2020

The reaction of $\mathrm{H}_3 \mathrm{~N}_3 \mathrm{~B}_3 \mathrm{Cl}_3$ (A) with $\mathrm{LiBH}_4$ in tetrahydrofuran gives inorganic benzene (B). Further, the reaction of...

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Q JEE-MAIN 2020

The decreasing order of reactivity of the following compounds towards nucleophilic substitution $\left(\mathrm{S}_{\mathrm{N}} 2\right)$ is

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Q JEE MAIN 2019

Hinsberg’s reagent is

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Q JEE MAIN 2020

Chlorine reacts with hot and concentrated NaOH and produces compounds (X) and (Y). Compound (X) gives white precipitate with silver...

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Q JEE MAIN 2019

The correct statements among I to III regarding group 13 element oxides are, (I) Boron trioxide is acidic. (II) Oxides...

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Q JEE MAIN 2019

HF has highest boiling point among hydrogen halides, because it has

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Q JEE MAIN 2021

Which one of the following is formed (mainly) when red phosphorus is heated in a sealed tube at 803 K...

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Q JEE MAIN 2020

Consider the following reaction: The product ‘X’ is used

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Q JEE MAIN 2021

Which one of the following is used to remove most of plutonium from spent nuclear fuel

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Q JEE MAIN 2021

Which one of the following is the major product of the given reaction?

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Q JEE MAIN 2019

The number of 2-centre-2-electron and 3-centre-2-electron bonds in B2H6 respectively are:

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Q JEE-MAIN 2021

The major product in the above reaction is :

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Q _JEE MAIN_2021_

The addition of silica during the extraction of copper from its sulphide ore:-

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Q JEE MAIN_2021

The correct sequence of correct reagents for the following transformation is:-

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Q JEE MAIN_2021_

$$ \mathrm{R}-\mathrm{CN} \xrightarrow[\text { (ii) } \mathrm{H}_2 \mathrm{O}]{\text { (i) } \mathrm{OIBAL}-\mathrm{H}} \mathrm{R}-\mathrm{Y} $$ Consider the above reaction and identify...

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Q JEE MAIN 2021

Which of the following is not a correct statement for primary aliphatic amines?

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Q JEE MAIN 2021

The major product of the following reaction is :

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Q JEE MAIN 2021

The number of halogen/(s) forming halic (V) acid is __________.

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Q JEE-MAIN 2021

Which one of the following gives the most stable Diazonium salt

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Q JEE MAIN 2021

The total number of reagents from those given below, that can convert nitrobenzene into aniline is ______. (Integer answer)

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Q JEE MAIN 2019

In the following compounds, the decreasing order of basic strength will be

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Q JEE-MAIN 2021

Identify A in the following reaction

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Q JEE MAIN 2019

Which of the following amines can be prepared by Gabriel phthalimide reaction?

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Q JEE MAIN 2019

Diborane $\left(\mathrm{B}_2 \mathrm{H}_6\right)$ reacts independently with $\mathrm{O}_2$ and $\mathrm{H}_2 \mathrm{O}$ to produce, respectively:

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Q JEE MAIN 2021

The major products A and B in the following set of reactions are :

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Q JEE MAIN 2021

$2 \mathrm{SO}_2(\mathrm{~g})+\mathrm{O}_2(\mathrm{~g}) \rightleftharpoons 2 \mathrm{SO}_3(\mathrm{~g})$ In an equilibrium mixture, the partial pressures are $\mathrm{P}_{\mathrm{SO}_3}=43 \mathrm{kPa} ; \mathrm{Po}_{\mathrm{O}_2}=530 \mathrm{~Pa}$ and $...

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Q JEE MAIN 2019

Coupling of benzene diazonium chloride with 1-naphthol in alkaline medium will give

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Q JEE MAIN 2021

What is the major product "P" of the following reaction ?

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Q JEE MAIN 2021

A reaction of benzonitrile with one equivalent $\mathrm{CH}_3 \mathrm{MgBr}$ followed by hydrolysis produces a yellow liquid " P ". The...

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Q JEE MAIN 2021

Consider the above reaction, the Product "P" is :

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Q JEE MAIN 2021

Compound A is converted to B on reaction with $\mathrm{CHCl}_3$ and KOH . The compound B is toxic and can...

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Q JEE MAIN 2021

Chemical nature of the nitrogen oxide compound obtained from a reaction of concentrated nitric acid and $\mathrm{P}_4 \mathrm{O}_{10}$ (in $...

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Q JEE MAIN 2021

The species given below that does NOT show disproportionation reaction is :

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Q JEE MAIN 2021

Which one of the following compounds of Group–14 elements is not known?

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Q JEE MAIN 2021

Which one of the products of the following reactions does not react with Hinsberg reagent to form sulphonamide?

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Q JEE MAIN 2021

Given below are two statements, one is labelled as Assertion (A) and other is labelled as Reason (R). Assertion (R)...

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Q JEE MAIN 2019

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Q JEE-MAIN 2021

(A) "X" and "Y" respectively are :

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Q JEE MAIN 2021

Consider the given reaction, percentage yield of :

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Q JEE MAIN 2021

An organic compound "A" on treatment with benzene sulphonyl chloride gives compound B. B is soluble in dil. NaOH solution....

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Q JEE MAIN 2021

In the reaction of hypobromite with amide, the carbonyl carbon is lost as :

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Q JEE-Main-2021_

The point of intersection and sudden increase in the slope, in the diagram given below, respectively, indicates :

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Q JEE MAIN 2021

1.86 g of aniline completely reacts to form acetanilide. 10\% of the product is lost during purification. Amount of acetanilide...

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Q JEE-Main-2021_

Which of the following reaction is an example of ammonolysis?

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Q JEE-Main-2021_

Hoffmann bromomide degradation of benzamide gives product A , which upon heating with $\mathrm{CHCl}_3$ and NaOH gives product B ....

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Q JEE MAIN 2021

The INCORRECT statement regarding the structure of $\mathrm{C}_{60}$ is :

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Q JEE MAIN 2021

Among the following allotropic forms of sulphur, the number of allotropic forms, which will show paramagnetism is (A) $\alpha$-sulphur (B)...

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Q JEE MAIN 2021

The diazonium salt of which of the following compounds will form a coloured dye on reaction with $\beta-$Naphthol in NaOH...

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Q JEE MAIN 2021

Match List-I and List-II.

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Q JEE MAIN 2021

The number of ionisable hydrogens present in the product obtained from a reaction of phosphorus trichloride and phosphonic acid is:

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Q JEE MAIN 2021

The correct order of the following compounds showing increasing tendency towards nucleophilic substitution reaction is :-

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Q JEE MAIN 2021

Consider the above chemical reaction and identify product "A"

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Q JEE MAIN 2021

Reagent, 1-naphthylamine and sulphanilic acid in acetic acid is used for the detection of

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Q JEE MAIN 2021

Considering the above reaction, X and Y respectively are:

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Q JEE MAIN 2021

An amine on reaction with benzenesulphonyl chloride produces a compound insoluble in alkaline solution. This amine can be prepared by...

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Q JEE MAIN 2021

Given below are two statements : Statement I : A mixture of chloroform and aniline can be separated by simple...

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Q JEE MAIN 2021

In the below chemical reaction, intermediate "X" and reagent/condition "A" are :

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Q JEE MAIN 2021

Find $\mathrm{A}, \mathrm{B}$ and C in the following reactions : $$ \begin{aligned} & \mathrm{NH}_3+\mathrm{A}+\mathrm{CO}_2 \rightarrow\left(\mathrm{NH}_4\right)_2 \mathrm{CO}_3 \\ & \left(\mathrm{NH}_4\right)_2 \mathrm{CO}_3+\mathrm{H}_2...

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Q JEE MAIN 2021

Given below are two statements : Statement I: Both $\mathrm{CaCl}_2 .6 \mathrm{H}_2 \mathrm{O}$ and $\mathrm{MgCl}_2 .8 \mathrm{H}_2 \mathrm{O}$ undergo dehydration...

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Q JEE MAIN 2021

'A' and 'B' in the following reactions are :

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Q JEE MAIN 2021

Given below are two statements: Statement I : An allotrope of oxygen is an important intermediate in the formation of...

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Q JEE MAIN 2021

The correct statement about $\mathrm{B}_2 \mathrm{H}_6$ is:

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Q JEE MAIN 2021

Which of the following reaction/s will not give p-aminoazobenzene ?

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Q JEE MAIN 2022

Given below are two statements : one is labelled as Assertion A and the other is labelled as Reason R....

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Q JEE MAIN 2022

The metal that has very low melting point and its periodic position is closer to a metalloid is :

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Q JEE MAIN 2022

Which oxoacid of phosphorous has the highest number of oxygen atoms present in its chemical formula?

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Q JEE MAIN 2022

The total number of acidic oxides from the following list is: $...

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Q JEE MAIN 2022

Match List–I with List–II, match the gas evolved during each reaction. Choose the correct answer from the options given below...

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Q JEE MAIN 2022

Given below are two statements : one is labelled as Assertion A and the other is labelled as Reason R....

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Q JEE MAIN 2022

The metal that has very low melting point and its periodic position is closer to a metalloid is :

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Q JEE MAIN 2022

Dinitrogen is a robust compound, but reacts at high altitude to form oxides. The oxide of nitrogen that can damage...

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Q JEE MAIN 2022

Given below are two statements: one is labeled as Assertion (A) and the other is labeled as Reason (R) Assertion...

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Q JEE MAIN 2022

Match List–I with List–II. Choose the correct answer from the options given below :

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Q JEE MAIN 2022

When borax is heated with CoO on a platinum loop, blue coloured bead formed is largely due to:

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Q JEE MAIN 2022

Given below are two statements. Statement I : Stannane is an example of a molecular hydride. Statement II: Stannane is...

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Q JEE MAIN 2022

Dinitrogen and dioxygen. the main constituents of air do not react with each other in atmosphere to form oxides of...

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Q JEE MAIN 2022

Concentrated $\mathrm{HNO}_3$ reacts with lodine to give

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Q JEE MAIN 2022

White phosphorus reacts with thionyl chloride to give

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Q JEE MAIN 2022

Borazine, also known as inorganic benzene, can be prepared by the reaction of 3-equivalents of "X" with 6-equivalents of "Y"....

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Q JEE-Main 2022

The photochemical smog does not generally contain :

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Q JEE-Main 2022

The interhalogen compound formed from the reaction of bromine with excess of fluorine is a :

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The geometry around boron in the product ' B ' formed from the following reaction is $$ \begin{aligned} & \mathrm{BF}_3+\mathrm{NaH}...

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Q JEE MAIN 2022

Match List - I with List - II. Choose the correct answer from the options given below :

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Q JEE-Main 2022

Match list- I with list-ll

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Q JEE MAIN 2022

Sulphur dioxide is one of the components of polluted air. $\mathrm{SO}_2$ is also a major contributor to acid rain. The...

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Q JEE MAIN 2022

Aqueous solution of which of the following boron compounds will be strongly basic in nature?

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Q JEE MAIN 2022

Which of the following oxoacids of sulphur contains “S” in two different oxidation states?

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Q JEE MAIN 2022

Among the given oxides of nitrogen; $\mathrm{N}_2 \mathrm{O}, \mathrm{N}_2 \mathrm{O}_3, \mathrm{~N}_2 \mathrm{O}_4$ and $\mathrm{N}_2 \mathrm{O}_5$ the number of compound/(s) having...

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Q JEE MAIN 2022

Given below are two statements. One is labelled as Assertion A and the other is labelled as Reason R. Assertion...

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Q JEE MAIN 2022

Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R. Assertion...

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Q JEE MAIN 2022

The gas produced by treating an aqueous solution of ammonium chloride with sodium nitrite is

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Q JEE-Main 2022

(a) Baryte, (b) Galena, (c) Zinc blende and (d) Copper pyrites. How many of these minerals are sulphide based?

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Q JEE MAIN 2022

The oxide which contains an odd electron at the nitrogen atom is

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Q JEE MAIN 2022

Consider the following reactions : $$ \begin{aligned} & \mathrm{PCl}_3+\mathrm{H}_2 \mathrm{O} \longrightarrow \mathrm{~A}+\mathrm{HCl} \\ & \mathrm{~A}+\mathrm{H}_2 \mathrm{O} \longrightarrow \mathrm{~B}+\mathrm{HCl} \end{aligned} $$...

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Q JEE-Main 2022

$\mathrm{PCl}_5$ is well known. but $\mathrm{NCl}_5$ is not. Because.

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Q JEE MAIN 2022

The number of bridged oxygen atoms present in compound B formed from the following reactions is $\mathrm{Pb}\left(\mathrm{NO}_3\right)_2 \xrightarrow{673} \mathrm{~A}+\mathrm{PbO}+\mathrm{O}_2$ $...

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Q JEE MAIN 2022

The oxoacid of phosphorus that is easily obtained from a reaction of alkali and white phosphorus and has two P-H...

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Q JEE MAIN 2022

Heating white phosphorus with conc. NaOH solution gives mainly

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Q JEE MAIN 2022

Match List-I with List-II Choose the correct answer from the options given below:

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Q JEE MAIN 2022

Match the List-I with List- II. Choose the most appropriate answer from the option given below:

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Q JEE MAIN 2022

Given below are two statements : Statement -I :The pentavalent oxide of group- 15 element. $\mathrm{E}_2 \mathrm{O}_5$.. is less acidic...

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Q JEE MAIN 2022

Nitrogen gas is obtained by thermal decomposition of

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Q JEE MAIN 2022

The reaction of with bromine and KOH gives $\mathrm{RNH}_2$ as the end product. Which one of the following is the...

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Q JEE-Main 2022

The most stable trihalide of nitrogen is:

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Q JEE-Main 2022

Identify the correct statement for B2H6 from those given below. Choose the most appropriate answer from the options given below...

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Q JEE MAIN 2024

Given below are two $\leqslant$ statements: Statement (I): $\mathrm{SiO}_2$ and $\mathrm{GeO}_2$ are acidic while SnO and PbO are amphoteric in...

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Q JEE-Main 2022

Given below are the oxides: $\mathrm{Na}_2 \mathrm{O}, \mathrm{As}_2 \mathrm{O}_3, \mathrm{~N}_2 \mathrm{O}, \mathrm{NO}$ and $\mathrm{Cl}_2 \mathrm{O}_7$ Number of amphoteric oxides is:

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Q JEE-Main 2022

The highest industrial consumption of molecular hydrogen is to produce compounds of element:

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Q JEE MAIN 2022

Consider the following reaction : A + alkali → B (Major Product) If B is an oxoacid of phosphorus with...

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Q JEE MAIN 2022

The correct order of melting points of hydrides of group 16 elements is :

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Q JEE MAIN 2024

Given below are two statements : Statement I: Group 13 trivalent halides get easily hydrolyzed by water due to their...

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Q JEE MAIN 2022

Consider the following reaction: $2 \mathrm{HSO}_4^{-}(\mathrm{aq}) \xrightarrow[\text { (2)Hydrolysis }]{\text { (1) Electrolysis }} 2 \mathrm{HSO}_4^{-}+2 \mathrm{H}^{+}+\mathrm{A}$ The dihedral angle...

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Q JEE MAIN 2022

Choose the correct stability order of group 13 elements in their +1 oxidation state.

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Q JEE MAIN 2022

Number of electron deficient molecules among the following $\mathrm{PH}_3, \mathrm{~B}_2 \mathrm{H}_6, \mathrm{CCl}_4, \mathrm{NH}_3$, LiH and $\mathrm{BCl}_3$ is

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Q JEE MAIN 2024

The strongest reducing agent amount the following is:

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Q JEE MAIN 2024

Choose the correct statements from the following A. All group 16 elements form oxides of general formula $\mathrm{EO}_2$ and $\mathrm{EO}_3$...

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Q JEE MAIN 2024

Given below are two statements : Statement I: $\mathrm{S}_8$ solid undergoes disproportionation reaction under alkaline conditions to form $\mathrm{S}^{2-}$ and...

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Q JEE MAIN 2024

Choose the correct statements about the hydrides of group 15 elements. A. The stability of the hydrides decreases in the...

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Q JEE MAIN 2024

Given below are two statements: Statement - I: Along the period, the chemical reactivity of the element gradually increases from...

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Q JEE MAIN 2024

Anomalous behaviour of oxygen is due to its

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Q JEE MAIN 2024

Given below are two statements: One is labelled as Assertion A and the other is labelled as Reason R. Assertion...

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Q JEE MAIN 2024

Identity the incorrect pair from the following:

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Q JEE MAIN 2024

Given below are two statements: Statement (I) : Oxygen being the first member of group 16 exhibits only -2 oxidation...

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Q JEE MAIN 2023

The ratio of sigma and bonds present in pyrophosphoric acid is _______.

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Q JEE MAIN 2023

If the formula of Borax is $\mathrm{Na}_2 \mathrm{~B}_4 \mathrm{O}_x(\mathrm{OH})_{4 n} \mathrm{zH}_2 \mathrm{O}$, then $\mathrm{x}+\mathrm{y}+\mathrm{z}=$ $\_\_\_\_$

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Q JEE MAIN 2023

The correct group of halide ions which can be oxidized by oxygen in acidic medium is

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Q JEE MAIN 2023

One mole of $\mathrm{P}_4$ reacts with 8 moles of $\mathrm{SOCl}_2$ to give 4 moles of A , x mole of...

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Q JEE MAIN 2023

Group-13 elements react with $\mathrm{O}_2$ in amorphous form to form oxides of type $\mathrm{M}_2 \mathrm{O}_3(\mathrm{M}=$ element $)$. Which among the...

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Q JEE MAIN 2023

Given below are two statements: Statement I: Boron is extremely hard indicating its high lattice energy Statement II: Boron has...

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Q JEE MAIN 2023

Given below are two statements: Statement I: During Electrolytic refining, the pure metal is made to act as anode and...

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Q JEE-Main_2023

The Lewis acid character of boron tri halides follows the order:

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Q JEE MAIN 2023

The correct order of bond enthalpy ( $\mathrm{kJ} \mathrm{mol}^{-1}$ ) is :

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Q JEE MAIN 2023

Sum of $\pi$-bonds present in peroxodisulphuric acid and pyrosulphuric acid is

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Q JEE MAIN 2023

Given below are two statements: [JEE (Main) 11-4-23_S1] [PB (N&O)_E] Ea$...

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Q JEE MAIN 2023

For compound having the formula GaAICI4, the correct option from the following is

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Q JEE MAIN 2023

Given below are two statements: Statements: $\mathrm{SbCl}_5$ is more covalent than $\mathrm{SbCl}_3$ Statements: The higher oxides of halogens also tend...

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Q JEE MAIN 2023

The number of $\mathrm{P}-\mathrm{O}-\mathrm{P}$ bonds in $\mathrm{H}_4 \mathrm{P}_2 \mathrm{O}_7,\left(\mathrm{HPO}_3\right)_3$ and $\mathrm{P}_4 \mathrm{O}_{10}$ are respectively.

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Q JEE MAIN 2023

On complete combustion, 0.492 g of an organic compound gave 0.792 g of $CO2$. The % of carbon in the...

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Q JEE MAIN 2023

Which one of the following reactions does not occur during extraction of copper ?

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Q JEE-Main_2023

In the extraction of copper, its sulphide ore is heated in a reverberatory furnace after mixing with silica to :

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Q JEE MAIN 2023

The methods NOT involved in concentration of ore are (A) Liquation (B) Leaching (C) Electrolysis (D) Hydraulic washing (E) Froth...

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Q JEE MAIN 2023

Reaction of thionyl chloride with white phosphorus forms a compound [A], which on hydrolysis gives [B], a dibasic acid. [A]...

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Q JEE MAIN 2023

Which of the Phosphorus oxoacid can create silver mirror from $\mathrm{AgNO}_3$ solution ?

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Q JEE MAIN 2024

Among the following oxide of p - block elements, number of oxides having amphoteric nature is Cl_2 O_7,CO,PbO_2,〖" " N〗_2...

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Q JEE MAIN 2024

Given below are two statements : one is labelled as Assertion (A) : and the other is labelled as Reason...

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Q JEE MAIN 2024

The F-ions make the enamel on teeth much harder by converting hydroxyapatite (the enamel on the surface of teeth) into...

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Q JEE MAIN 2024

Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion...

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Q JEE-Main 2024

Given below are two statements: Statement I : $\mathrm{N}\left(\mathrm{CH}_3\right)_3$ and $\mathrm{P}\left(\mathrm{CH}_3\right)_3$ can act as ligands to form transition metal complexes....

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Q JEE MAIN 2024

Which of the following material is not a semiconductor.

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Q JEE MAIN 2024

Given below are two statements : Statement I : Gallium is used in the manufacturing of thermometers. Statement II :...

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Q JEE MAIN 2024

Given below are two statements : Statement I: In group 13, the stability of +1 oxidation state increases down the...

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Q JEE MAIN 2024

Consider the oxides of group 14 elements SiO_2,GeO_2,SnO_2,PbO_2,CO and GeO. The amphoteric oxides are

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Q JEE MAIN 2024

Identify the incorrect pair from the following:

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Q JEE MAIN 2024

The correct sequence of electron gain enthalpy of the elements listed below is A. Ar B. Br C. F D....

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Q JEE MAIN 2024

Given below are two statements : Statement I : The electronegativity of group 14 elements from Si to Pb gradually...

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Q JEE MAIN 2024

Give below are two statements: Statement-I : Noble gases have very high boiling points. Statement-II: Noble gases are monoatomic gases....

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Q JEE MAIN 2024

Given below are the two statements: one is labeled as Assertion (A) and the other is labeled as Reason (R)....

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Q JEE MAIN 2024

From the given list, the number of compounds with +4 oxidation state of Sulphur $...

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Q JEE MAIN 2024

Yellow compound of lead chromate gets dissolved on treatment with hot NaOH solution. The product of lead formed is a...

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Q JEE MAIN 2024

Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R)....

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Q JEE MAIN 2025

First ionisation enthalpy values of first four group 15 elements are given below. Choose the correct value for the element...

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Q JEE MAIN 2025

The group 14 elements A and B have the first ionisation enthalpy values of 708 and $715\;{\rm{kJ}}\;{\rm{mo}}{{\rm{l}}^{ - 1}}$ respectively....

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Q JEE MAIN 2025

Given below are the pairs of group 13 elements showing their relation in terms of atomic radius. $...

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Q JEE MAIN 2025

A group 15 element forms $\mathrm{d} \pi-\mathrm{d} \pi$ bond with transition metals. It also forms hydride, which is a strongest...

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Q JEE MAIN 2025

Given below are two statements: Statement I : The N - N single bond is weaker and longer than that...

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Q JEE MAIN 2025

Given below are the atomic numbers of some group 14 elements. The atomic number of the element with lowest melting...

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Q JEE MAIN 2025

The large difference between the melting and boiling points of oxygen and sulphur may be explained on the basis of

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Q JEE MAIN 2025

The maximum covalency of a non-metallic group 15 element ‘E’ with weakest E – E bond is :

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