JEE Main 2021 (Online) 26th August Evening Shift | Periodic Table & Periodicity Question 88 | Chemistry

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

Assertion (A) : Barium carbonate is insoluble in water and is highly stable.

Reason (R) : The thermal stability of the carbonates increases with increasing cationic size.

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

(A) is true but (R) is false

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

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

JEE Main 2021 (Online) 27th July Evening Shift

MCQ (Single Correct Answer)

-1

The correct order of first ionisation enthalpy is :

Mg < S < Al < P

Mg < Al < S < P

Al < Mg < S < P

Mg < Al < P < S

JEE Main 2021 (Online) 27th July Morning Shift

MCQ (Single Correct Answer)

-1

Match List - I with List - II :

	List - I		List - II
(a)	NaOH	(i)	Acidic
(b)	$$Be{(OH)_2}$$	(ii)	Basic
(c)	$$Ca{(OH)_2}$$	(iii)	Amphoteric
(d)	$$B{(OH)_3}$$
(e)	$$Al{(OH)_3}$$

Choose the most appropriate answer from the options given below

(a)-(ii), (b)-(ii), (c)-(iii), (d)-(ii), (e)-(iii)

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

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

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

JEE Main 2021 (Online) 25th July Evening Shift

MCQ (Single Correct Answer)

-1

The ionic radii of F^$$-$$ and O^2$$-$$ respectively are 1.33$$\mathop A\limits^o $$ and 1.4$$\mathop A\limits^o $$, while the covalent radius of N is 0.74$$\mathop A\limits^o $$.

The correct statement for the ionic radius of N^3$$-$$ from the following is :

It is smaller than F^$$-$$ and N

It is bigger than O2^$$-$$ and F^$$-$$

It is bigger than F^$$-$$ and N, but smaller than of O^2$$-$$

It is smaller than O^2$$-$$ and F^$$-$$, but bigger than of N

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