JEE Main 2021 (Online) 31st August Evening Shift | Hydrogen Question 24 | Chemistry

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JEE Main 2021 (Online) 31st August Evening Shift

MCQ (Single Correct Answer)

-1

Which one of the following statements is incorrect?

Atomic hydrogen is produced when H₂ molecules at a high temperature are irradiated with UV radiation.

At around 2000 K, the dissociation of dihydrogen into its atoms is nearly 8.1%

Bond dissociation enthalpy of H₂ is highest among diatomic gaseous molecules which contain a single bond.

Dihydrogen is produced on reacting zinc with HCl as well as NaOH_(aq).

JEE Main 2021 (Online) 27th August Evening Shift

MCQ (Single Correct Answer)

-1

The oxide that gives H₂O₂ most readily on treatment with H₂O is :

PbO₂

Na₂O₂

SnO₂

BaO₂ . 8H₂O

JEE Main 2021 (Online) 27th August Morning Shift

MCQ (Single Correct Answer)

-1

Deuterium resembles hydrogen in properties but :

reacts slower than hydrogen

reacts vigorously than hydrogen

reacts just as hydrogen

emits $$\beta$$⁺ particles

JEE Main 2021 (Online) 26th August Evening Shift

MCQ (Single Correct Answer)

-1

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

Assertion (A) : Heavy water is used for the study of reaction mechanism.

Reason (R) : The rate of reaction for the cleavage of O - H bond is slower than that of O - D bond.

Choose the most appropriate answer from the options given below :

Both (A) and (R) are true but (R) is not the true explanation of (A).

Both (A) and (R) are true and (R) is the true explanation of (A).

(A) is false but (R) is true.

(A) is true but (R) is false.

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