Q JEE MAIN 2026

0.25 g of an organic compound " A " containing carbon, hydrogen and oxygen was analysed using the combustion method....

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Q JEE MAIN 2026

In Dumas method for estimation of nitrogen, 0.50 g of an organic compound gave 70 mL of nitrogen collected at...

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Q JEE MAIN_2026_

A student has been given 0.314 g of an organic compound and asked to estimate Sulphur. During the experiment, the...

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Q JEE MAIN 2026

Consider the following two reactions A and B. Numerical value of [molar mass of $x+$ molar mass of $y$ ]...

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Q JEE MAIN 2026

The unsaturated ether on acidic hydrolysis produces carbonyl compounds as shown below:- $$ \begin{aligned} \mathrm{CH}_3-\mathrm{CH}=\mathrm{CH}- & \mathrm{O}-\mathrm{CH}=\mathrm{CH}_2 \\ & \downarrow...

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Q JEE MAIN 2026

A student is given one compound among the following compounds that gives positive test with Tollen's reagent. The compound is...

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Q JEE MAIN 2026

In Carius method 0.2425 g of an organic compound gave 0.5253 g silver chloride. The percentage of chlorine in the...

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Q JEE MAIN 2026

Given below are two statements : Statement I: Sublimation is used for the separation and purification of compounds with low...

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Q JEE MAIN 2026

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

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Q JEE MAIN 2026

Sodium fusion extract of an organic compound $(\mathrm{Y})$ with $\mathrm{CHCl}_3$ and chlorine water gives violet color to the $\mathrm{CHCl}_3$ layer....

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Q JEE MAIN 2026

When 1 g of compound $(\mathrm{X})$ is subjected to Kjeldahl's method for estimation of nitrogen, $...

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Q JEE MAIN 2026

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

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Q JEE MAIN 2026

By usual analysis, 1.00 g of compound $(\mathrm{X})$ gave 1.79 g of magnesium pyrophosphate. The percentage of phosphorus in compound...

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Q JEE MAIN_2026_

In Carius method, 0.75 g of an organic compound gave 1.2 g of barium sulphate, find percentage of sulphur (molar...

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Q JEE MAIN 2020

While titrating dilute HCl solution with aqueous NaOH, which of the following will not be required?

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Q JEE MAIN 2020

In Carius method of estimation of halogen, 0.172 g of an organic compound showed presence of 0.08 g of bromine....

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Q JEE MAIN 2020

Two compounds $A$ and $B$ with same molecular formula $\left(\mathrm{C}_3 \mathrm{H}_6 \mathrm{O}\right)$ undergo Grignard's reaction with methylmagnesium bromide to give...

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Q JEE MAIN 2020

In an estimation of bromine by Carius method, 1.6 g of an organic compound gave 1.88 g of AgBr. The...

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Q JEE MAIN 2020

The element that can be refined by distillation is

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Q JEE MAIN 2020

Match the following :

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Q JEE-MAIN 2020

Consider the following reaction : The product ‘P’ gives positive ceric ammonium nitrate test. This is because of the presence...

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Q JEE MAIN 2019

The peptide that gives positive ceric ammonium nitrate and carbylamine tests is

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Q JEE MAIN 2021

Which one of the following tests used for the identification of functional groups in organic compounds does not use copper...

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Q JEE MAIN 2021

In the sulphur estimation, 0.471 g of an organic compound gave 1.44 g of barium sulphate. The percentage of sulphur...

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Q JEE MAIN 2021

The number of moles of CuO , that will be utilized in Dumas method for estimation nitrogen in a sample...

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Q JEE MAIN 2021

In Carius method for estimation of halogens, 0.2 g of an organic compound gave 0.188 g of AgBr . The...

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Q JEE MAIN 2021

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 2021

0.8 g of an organic compound was analysed by Kjeldahl's method for the estimation of nitrogen. If the percentage of...

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Q JEE MAIN 2021

Which among the above compound/s does/do not form Silver mirror when treated with Tollen's reagent?

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Q JEE-Main_2021_

Which one of the following set of elements can be detected using sodium fusion extract ?

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Q JEE MAIN 2021

The metal that can be purified economically by fractional distillation method is:

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Q JEE MAIN 2021

The correct structure of Rhumann's Purple, the compound formed in the reaction of ninhydrin with proteins is :

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Q JEE MAIN 2021

When 0.15 g of an organic compound was analyzed using Carius method for estimation of bromine, 0.2397 g of AgBr...

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Q JEE MAIN 2021

Which purification technique is used for high boiling organic liquid compound (decomposes near its boiling point)?

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Q JEE MAIN 2021

In Carius method, halogen containing organic compound is heated with fuming nitric acid in the presence of :

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Q JEE MAIN 2021

An organic compound is subjected to chlorination to get compound A using 5.0 g of chlorine. When 0.5 g of...

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Q JEE-MAIN 2021

Nitrogen can be estimated by Kjeldahl's method for which of the following compound ?

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Q JEE-Main-2021

Given below are two statements : Statement-I : Retardation factor (Rf) can be measured in meter/centimeter. Statement-II : Rf value...

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Q JEE MAIN 2021

In Duma's method of estimation of nitrogen, 0.1840 g of an organic compound gave 30 mL of nitrogen collected at...

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Q JEE MAIN 2021

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Q JEE MAIN 2021

In chromotography technique, the purification of compound is independent of :

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Q JEE MAIN 2022

The separation of two coloured substances was done by paper chromatography. The distances travelled by solvent front, substance A and...

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Q JEE-Main 2022

While estimating the nitrogen present in an organic compound by Kjeldahl's method, the ammonia evolved from 0.25 g of the...

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Q JEE MAIN 2022

Match List-I with List-II

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Q JEE MAIN2022

A sample of 0.125 g of an organic compound when analysed by Duma's method yields 22.78 mL of nitrogen gas...

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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...

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Q JEE MAIN 2022

Which technique among the following, is most appropriate in separation of a mixture of 100 mg of p-nitrophenol and picric...

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Q JEE-MAIN 2022

When you walk through a metal detector carrying a metal object in your pocket, it raises an alarm. This phenomenon...

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Q JEE MAIN 2022

During halogen test, sodium fusion extract is boiled with concentrated HNO3 to

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Q JEE MAIN 2022

Kjeldahl's method was used for the estimation of nitrogen in an organic compound. The ammonia evolved from 0.55 g of...

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Q JEE MAIN 2022

The formula of the purple colour formed in Laissaigne’s test for sulphur using sodium nitroprusside is

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Q JEE MAIN 2022

Which of the following is structure of a separating funnel?

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Q JEE MAIN 2024

Following Kjeldahl's method, 1 g of organic compound released ammonia, that neutralised 10 mL of $2 \mathrm{MH}_2 \mathrm{SO}_4$. The percentage...

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Q JEE MAIN 2022

Given below are two statements : Statement I : In 'Lassaigne's Test, when both nitrogen and sulphur are present in...

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Q JEE MAIN 2024

Lassaigne's test is used for detection of :

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Q JEE MAIN 2024

Which among the following purification methods is based on the principle of "Solubility" in two different solvents?

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Q JEE MAIN 2025

In Dumas' method 292 mg of an organic compound released 50 mL of nitrogen gas at 300 K temperature and...

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Q JEE MAIN 2025

Mixture of 1 g each of chlorobenzene, aniline and benzoic acid is dissolved in 50 mL ethyl acetate and placed...

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Q JEE MAIN 2025

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

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Q JEE MAIN 2025

In Dumas' method for estimation of nitrogen 0.4 g of an organic compound gave 60 mL of nitrogen collected at...

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Q JEE MAIN 2023

In satellite communication, the uplink frequency band used is:

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Q JEE MAIN 2023

Match List I with List II:

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Q JEE MAIN 2023

Choose the correct representation of conductometric titration of benzoic acid vs sodium hydroxide.

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Q JEE MAIN_2023

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

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Q JEE MAIN 2023

Match items of column I and IICorrect match is :

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Q JEE MAIN 2023

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

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Q 30-1-23{S1}

Which of the following compounds would give the following set of qualitative analysis ? (i) Fehling's Test: Positive (ii) Na...

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Q JEE MAINS 2024

A message signal of frequency 5 kHz is used to modulate a carrier signal of frequency 2 MHz. The bandwidth...

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Q JEE MAIN 2024

In Kjeldahl's method for estimation of nitrogen, CuSO_4 acts as :

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Q JEE MAIN 2024

On a thin layer chromatographic plate, an organic compound moved by 3.5" " cm, while the solvent moved by 5"...

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Q JEE MAIN 2024

The Lassiagne's extract is boiled with dil HNO_3 before testing for halogens because,

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Q JEE MAIN 2025

Which of the following compounds is least likely to give effervescence of ${\rm{C}}{{\rm{O}}_2}$ in presence of aq. ${\rm{NaHC}}{{\rm{O}}_3}$ ?

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Q JEE MAIN 2025

In Dumas' method for estimation of nitrogen 1 g of an organic compound gave 150 mL of nitrogen collected at...

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Q JEE MAIN 2025

The purification method based on the following physical transformation is :

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Q JEE MAIN 2025

During estimation of nitrogen by Dumas' method of compound ${\rm{X}}(0.42\;{\rm{g}})$ _______ mL of ${{\rm{N}}_2}$ gas will be liberated at STP....

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Q JEE MAIN 2025

Among the following cations, the number of cations which will give characteristic precipitate in their identification tests with $...

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Q JEE MAIN 2025

Given below are two statements I and II. Statement-I : Dumas method is used for estimation of "Nitrogen" in an...

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Q JEE MAIN 2025

During "S" estimation, 160 mg of an organic compound gives 466 mg of barium sulphate. The percentage of Sulphur in...

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Q JEE MAIN 2025

Given below are two statements: Statement I: In Lassaigne's test, the covalent organic molecules are transformed into ionic compounds. Statement...

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Q JEE MAIN 2025

Given below are two statements : Statement (I) : Nitrogen, sulphur, halogen and phosphorus present in an organic compound are...

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Q JEE MAIN 2025

The compounds which give positive Fehling's test are :

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