JEE Main 2021 (Online) 27th August Morning Shift | s-Block Elements Question 51 | Chemistry

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JEE Main 2021 (Online) 27th August Morning Shift

MCQ (Single Correct Answer)

-1

The number of water molecules in gypsum, dead burnt plaster and plaster of Paris, respectively are :

2, 0 and 1

0.5, 0 and 2

5, 0 and 0.5

2, 0 and 0.5

JEE Main 2021 (Online) 26th August Morning Shift

MCQ (Single Correct Answer)

-1

What are the products formed in sequence when excess of CO₂ is passed in slaked lime?

Ca(HCO₃)₂, CaCO₃

CaCO₃, Ca(HCO₃)₂

CaO, Ca(HCO₃)₂

CaO, CaCO₃

JEE Main 2021 (Online) 27th July Evening Shift

MCQ (Single Correct Answer)

-1

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

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

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

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

JEE Main 2021 (Online) 27th July 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 : 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 is true but R is false

A is false but R is true

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

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

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