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1
JEE Main 2021 (Online) 27th August Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language
The correct order of ionic radii for the ions, P3$$-$$, S2$$-$$, Ca2+, K+, Cl$$-$$ is :
A
P3$$-$$ > S2$$-$$ > Cl$$-$$ > K+ > Ca2+
B
Cl$$-$$ > S2$$-$$ > P3$$-$$ > Ca2+ > K+
C
P3$$-$$ > S2$$-$$ > Cl$$-$$ > Ca2+ > K+
D
K+ > Ca2+ > P3$$-$$ > S2$$-$$ > Cl$$-$$
2
JEE Main 2021 (Online) 26th August Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language
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.
A
Both (A) and (R) are true and (R) is the true explanation of (A)
B
(A) is true but (R) is false
C
Both (A) and (R) are true but (R) is not the true explanation of (A)
D
(A) is false but (R) is true.
3
JEE Main 2021 (Online) 27th July Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language
The correct order of first ionisation enthalpy is :
A
Mg < S < Al < P
B
Mg < Al < S < P
C
Al < Mg < S < P
D
Mg < Al < P < S
4
JEE Main 2021 (Online) 27th July Morning Shift
MCQ (Single Correct Answer)
+4
-1
Change Language
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
(a)-(ii), (b)-(ii), (c)-(iii), (d)-(ii), (e)-(iii)
B
(a)-(ii), (b)-(iii), (c)-(ii), (d)-(i), (e)-(iii)
C
(a)-(ii), (b)-(ii), (c)-(iii), (d)-(i), (e)-(iii)
D
(a)-(ii), (b)-(i), (c)-(ii), (d)-(iii), (e)-(iii)
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