JEE Main 2021 (Online) 18th March Morning Shift | Hydrogen Question 37 | Chemistry

JEE Main 2021 (Online) 18th March Morning Shift

MCQ (Single Correct Answer)

-1

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

Assertion A : During the boiling of water having temporary hardness, Mg(HCO₃)₂ is converted to MgCO₃.

Reason R : The solubility product of Mg(OH)₂ is greater than that of MgCO₃.

In the light of the above statements, choose the most appropriate answer from the options given below :

Both A and R are true but R is not the correct explanation of A

A is true but R is false

Both A and R are true and R is the correct explanation of A

A is false but R is true

JEE Main 2021 (Online) 17th March Evening Shift

MCQ (Single Correct Answer)

-1

The functional groups that are responsible for the ion-exchange property of cation and anion exchange resins, respectively, are :

$$-$$SO₃H and $$-$$NH₂

$$-$$NH₂ and COOH

$$-$$NH₂ and $$-$$SO₃H

$$-$$SO₃H and $$-$$COOH

JEE Main 2021 (Online) 17th March Morning Shift

MCQ (Single Correct Answer)

-1

The INCORRECT statement(s) about heavy water is (are)

(A) used as a moderator in nuclear reactor

(B) obtained as a by-product in fertilizer industry

(C) used for the study of reaction mechanism

(D) has a higher dielectric constant than water

Choose the correct answer from the options given below :

(D) only

(B) and (D) only

(B) only

JEE Main 2021 (Online) 16th March Evening Shift

MCQ (Single Correct Answer)

-1

The correct statements about H₂O₂ are :

(A) used in the treatment of effluents.

(B) used as both oxidising and reducing agents.

(C) the two hydroxyl groups lie in the same plane.

(D) miscible with water.

Choose the correct answer from the options given below :

(A), (C) and (D) only

(A), (B), (C) and (D)

(A), (B) and (D) only

(B), (C) and (D) only

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