Question

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2) statementA; square of a prime number is always prime.. statement b;; the product of two perfect squares is a perfect square ...
a)) both A and B are true
b)) both A and B are false
c))A is true and false
d)) Ais false and B is true

Statement type questions :
12. Statement (A): The atomic radii in a group top to bottom increases.
Statement (B): The atomic radii in a period left to right decreases.
Statement (C): C4, Si++ are iso electronic species.
a) All the above statements are correct
b) All the above statements are incorrect
c) A, B are correct but C is incorrect
d) A, B are incorrect and C is correct.

Match the following:
13.
Column - I
A) Atomic radii of Li
B) F-ion isoelectronic to
C) Lanthanide contraction

Column - II
1) Decreasing lanthanides size gradually
2) Al+3
3) 1.23Å
options ..
...A).......B).....C)
a)3 2 1
b )2 1 3
c )1 3 2
d)3 1 2​

Answer 1

Answer:

2)) Both A and B are true

12))A, B are incorrect and C is correct.