Q JEE MAIN 2019

The temporary hardness of water is due to

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Q JEE MAIN_2019_

The synonym for water gas when used in the production of methanol is :

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Q JEE MAIN 2019

The temporary hardness of water is due to

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Q JEE-MAIN 2019

The hardness of a water sample (in terms of equivalents of $\mathrm{CaCO}_3$ ) containing $10^{-3} \mathrm{M} \mathrm{CaSO}_4$ is (molar mass...

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Q JEE MAIN 2019

The volume strength of $1 \mathrm{M} \mathrm{H}_2 \mathrm{O}_2$ is (Molar mass of $\mathrm{H}_2 \mathrm{O}_2=34 \mathrm{~g} \mathrm{~mol}^{-1}$ )

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Q JEE MAIN 2020

The equation that represents the water-gas shift reaction is

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Q JEE MAIN 2020

The hardness of a water sample containing $10^{-3} \mathrm{M} \mathrm{MgSO}_4$ expressed as $\mathrm{CaCO}_3$ equivalents (in ppm) is $\_\_\_\_$ . (molar...

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Q JEE MAIN 2019

NaH is an example of

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Q JEE MAIN 2019

The correct statements among (a) to (d) regarding $\mathrm{H}_2$ as a fuel are (a) It produces less pollutants than petrol....

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Q JEE-MAIN 2020

The one that is NOT suitable for the removal of permanent hardness of water is

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Q JEE MAIN 2020

Hydrogen peroxide, in the pure state, is

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Q JEE Main 2019

The total number of isotopes of hydrogen and number of radioactive isotopes among them, respectively, are

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Q JEE MAIN 2020

Consider the following equations : $$ 2 \mathrm{Fe}^{2+}+\mathrm{H}_2 \mathrm{O}_2 \rightarrow x A+y B $$ (in basic medium) $$ 2 \mathrm{MnO}_4^{-}+6...

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Q JEE Main 2019

The chemical nature of hydrogen peroxide is

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Q JEE MAIN 2019

The major product of the following reaction is :

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Q JEE MAIN 2020

Hydrogen has three isotopes (A), (B) and (C). If the number of neutron(s) in (A), (B) and (C) respectively, are...

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Q JEE MAIN 2021

Which one of the following statements is incorrect ?

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Q JEE MAIN 2020

In comparison to the zeolite process for the removal of permanent hardness, the synthetic resins method is

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Q JEE MAIN 2021

What are the products formed in sequence when excess of $\mathrm{CO}_2$ is passed in slaked lime?

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Q JEE MAIN 2021

The oxide that gives $\mathrm{H}_2 \mathrm{O}_2$ most readily on treatment with $\mathrm{H}_2 \mathrm{O}$ is

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Q JEE MAIN 2021

The conversion of hydroxyapatite occurs due to presence of F– ions in water. The correct formula of hydroxyapatite is:

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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

Deuterium resembles hydrogen in properties but :

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Q JEE MAIN 2021

Given below are two statements : Statement-I : The process of producing syn-gas is called gasification of coal. Statement-II: The...

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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...

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Q JEE MAIN 2021

Isotope(s) of hydrogen which emits low energy $\beta^{-}$ particles with $t_{1 / 2}$ value > 12 years is/are

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Q JEE MAIN 2021

Which one of the following chemical agent is not being used for dry–cleaning of clothes?

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Q JEE MAIN 2021

At 298.2 K the relationship between enthalpy of bond dissociation (in $\mathrm{kJ} \mathrm{mol}^{-1}$ ) for hydrogen (EH) and its isotope,...

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Q JEE MAIN 2021

The single largest industrial application of dihydrogen is :

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Q JEE MAIN 2021

In basic medium, $\mathrm{H}_2 \mathrm{O}_2$ exhibits which of the following reactions? (A) $\mathrm{Mn}^{2+} \rightarrow \mathrm{Mn}^{4+}$ (B) $\mathrm{I}_2 \rightarrow \mathrm{I}^{-}$ (C)...

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Q JEE Main 2019

A water sample has ppm level concentration of the following metals: $\mathrm{Fe}=0.2 ; \mathrm{Mn}=5.0 ; \mathrm{Cu}=3.0 ; \mathrm{Zn}=5.0$. The metal...

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Q JEE Main 2019

The isotopes of hydrogen are

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Q JEE-Main-2021_

The INCORRECT statement(s) about heavy water is (are) (A) used as a moderator in nuclear reactor (B) obtained as a...

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Q JEE MAIN 2021

The correct statements about $\mathrm{H}_2 \mathrm{O}_2$ are : (A) used in the treatment of effluents. (B) used as both oxidising...

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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

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

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Q JEE MAIN 2021

Water does not produce CO on reacting with:

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Q

Calgon is used for water treatment. Which of the following statement is NOT true about Calgon?

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Q JEE MAIN 2021

Given below are two statements : Statement I: $\mathrm{H}_2 \mathrm{O}_2$ can act as both oxidising and reducing agent in basic...

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Q JEE MAIN 2021

Statements about heavy water are given below. A. Heavy water is used in exchange reactions for the study of reaction...

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Q JEE MAIN 2021

(A) $\mathrm{HOCl}+\mathrm{H}_2 \mathrm{O}_2 \rightarrow \mathrm{H}_3 \mathrm{O}^{+}+\mathrm{Cl}^{-}+\mathrm{O}_2$ (B) $\mathrm{I}_2+\mathrm{H}_2 \mathrm{O}_2+2 \mathrm{OH}^{-} \rightarrow 2 \mathrm{I}^{-}+2 \mathrm{H}_2 \mathrm{O}+\mathrm{O}_2$ Choose the correct option.

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Q JEE MAIN 2022

Given below are two statements: Statement I : Hydrogen peroxide can act as an oxidizing agent in both acidic and...

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Q JEE MAIN 2022

For kinetic study of the reaction of iodide ion with $\mathrm{H}_2 \mathrm{O}_2$ at room temperature : (A) Always use freshly...

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Q JEE MAIN 2022

High purity (>99.95%) dihydrogen is obtained by

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Q JEE MAIN 2022

The metal salts formed during softening of hardwater using Clark's method are :

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Q JEE MAIN 2022

On reaction with stronger oxidizing agent like $\mathrm{KIO}_4$, hydrogen peroxide oxidizes with the evolution of $\mathrm{O}_2$. The oxidation number of...

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Q JEE MAIN 2022

The products obtained during treatment of hard water using Clark's method are:

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Q JEE MAIN 2022

Which of the following can be used to prevent the decomposition of H2O2?

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Q JEE MAIN 2022

Hydrogen has three isotopes : protium $\left({ }^1 \mathrm{H}\right)$ deuterium $\left({ }^2 \mathrm{H}\right.$ or D$)$ and tritium $\left({ }^3 \mathrm{H}\right.$...

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Q JEE MAIN 2022

Which one of the following reactions indicates the reducing ability of hydrogen peroxide in basic medium ?

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Q JEE MAIN 2023

Match List I with List II 1-Bromopropane is reacted with reagents in List-I to give product in List-II

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Q JEE MAIN 2023

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 2023

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 2023

Which of the following can reduce decomposition of $\mathrm{H}_2 \mathrm{O}_2$ on exposure to light

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Q JEE MAIN 2023

In an ice crystal, each water molecule is hydrogen bonded to ……... neighbouring molecules.

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Q JEE MAIN 2023

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

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Q JEE-Main_2023

Given below are two statements : Statement I: $\mathrm{H}_2 \mathrm{O}_2$ is used in the synthesis of Cephalosporin Statement II :...

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Q JEE MAIN 2023

$\mathrm{O}-\mathrm{O}$ bond length in $\mathrm{H}_2 \mathrm{O}_2$ is $X$ than the $\mathrm{O}-\mathrm{O}$ bond length in $\mathrm{F}_2 \mathrm{O}_2$. The $\mathrm{O}-\mathrm{H}$ bond length...

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Q JEE MAIN 2023

The starting material for convenient preparation of deuterated hydrogen peroxide $\left(\mathrm{D}_2 \mathrm{O}_2\right)$ in laboratory is:

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Q jee main 2023

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Q JEE MAIN 2023

In which of the following reactions the hydrogen peroxide acts as a reducing agent?

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Q JEE MAIN 2023

A certain quantity of real gas occupies a volume of 0.15 dm3 at 100 atm and 500 K when its...

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Q JEE MAIN 2023

During water-gas shift reaction

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Q JEE Main 2023

Given below are two statements: Statement-I Permutit process is more efficient compared to the synthetic resin method for the softening...

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Q JEE MAIN 2023

Given below are two statements: Statement-I Permutit process is more efficient compared to the synthetic resin method for the softening...

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Q JEE MAIN 2023

Given below are two reactions, involved in the commercial production of dihydrogen $\left(\mathrm{H}_2\right)$. The two reactions are carried out at...

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Q JEE MAIN 2023

Given below are two statements: one is labelled as assertion and the other is labelled as reason. Assertion: Loss of...

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Q JEE MAIN 2023

$\mathrm{H}_2 \mathrm{O}_2$ acts as a reducing agent in

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Q JEE MAIN 2023

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 2023

Which of the given compounds can enhance the efficiency of hydrogen storage tank?

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