Given below are the two statements: one is labeled as Assertion (… - Vidyadip

MCQ

Given below are the two statements: one is labeled as Assertion (A) and the other is labeled as Reason (R).
Assertion (A):There is a considerable increase in covalent radius from N to P. However from As to Bi only a small increase in covalent radius is observed.
Reason (R): covalent and ionic radii in a particular oxidation state increases down the group.
In the light of the above statement, choose the most appropriate answer from the options given below:

A
(A) is false but (R) is true
✓
Both (A) and (R) are true but (R) is not the correct explanation of (A)
C
(A) is true but (R) is false
D
Both (A) and (R) are true and (R) is the correct explanation of (A)

✓

Answer

Correct option: B.

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

(B)
According to NCERT,
Statement-I: Factual data,
Statement-II is true.
But correct explanation is presence of completelyfilled d and f-orbitals of heavier members

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