JEE Main 2021 (Online) 27th July Evening Shift | s-Block Elements Question 68 | Chemistry

1

JEE Main 2021 (Online) 27th July Evening Shift

MCQ (Single Correct Answer)

+4

-1

Out of Syllabus

Match List - I with List - II :

	List - I		List - II
(a)	Li	(i)	photoelectric cell
(b)	Na	(ii)	absorbent of $$C{O_2}$$
(c)	K	(iii)	coolant in fast breeder nuclear reactor
(d)	Cs	(iv)	treatment of cancer
		(v)	bearings for motor engines

Choose the correct answer from the options given below :

A

(a) - (v), (b) - (i), (c) - (ii), (d) - (iv)

B

(a) - (v), (b) - (ii), (c) - (iv), (d) - (i)

C

(a) - (iv), (b) - (iii), (c) - (i), (d) - (ii)

D

(a) - (v), (b) - (iii), (c) - (ii), (d) - (i)

2

JEE Main 2021 (Online) 27th July Morning Shift

MCQ (Single Correct Answer)

+4

-1

Out of Syllabus

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

Assertion A : Lithium halides are some what covalent in nature.

Reason R : Lithium posses high polarisation capability.

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

A

A is true but R is false

B

A is false but R is true

C

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

D

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

3

JEE Main 2021 (Online) 25th July Evening Shift

MCQ (Single Correct Answer)

+4

-1

Out of Syllabus

Match List I with List II :

	List-I Elements		List-II Properties
(a)	Li	(i)	Poor water solubility of $${I^ - }$$ salt
(b)	Na	(ii)	Most abundant element in cell fluid
(c)	K	(iii)	Bicarbonate salt used in fire extinguisher
(d)	Cs	(iv)	Carbonate salt decomposes easily on heating

Choose the correct answer from the options given below :

A

(a)-(iv), (b)-(iii), (c)-(ii), (d)-(i)

B

(a)-(i), (b)-(iii), (c)-(ii), (d)-(iv)

C

(a)-(iv), (b)-(ii), (c)-(iii), (d)-(i)

D

(a)-(i), (b)-(ii), (c)-(iii), (d)-(iv)

4

JEE Main 2021 (Online) 25th July Morning Shift

MCQ (Single Correct Answer)

+4

-1

Out of Syllabus

Given below are two statements :

Statement I : None of the alkaline earth metal hydroxides dissolve in alkali.

Statement II : Solubility of alkaline earth metal hydroxides in water increases down the group.

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

A

Statement I is correct but Statement II is incorrect.

B

Statement I is incorrect but Statement II is correct.

C

Statement I and Statement II both are incorrect.

D

Statement I and Statement II both are correct.