Question

Which of the following order is wrong?
(a) NH₃ < PH₃ < AsH₃ —Acidic
(b) Li < Be < B < C—IE₁
(c) Al₂O₃ < MgO < Na₂O < K₂O—Basic
(d) Li⁺ < Na⁺ < K⁺ < Cs⁺ —Ionic radius

Answer 1

Answer:

the answer is d as per the question

Answer 2

(b) Li < Be < B < C—IE₁

Explanation:

Li -- 1s2 2s2

Be -- 1s2 2s2

B  -- 1s2 2s2 2p1

C  -- 1s2 2s2 2p2

Therefore Li < B < Be < C

Be has higher ionization potential than B as Be has a fully filled 2s orbital and hence has extra stability.

Option B is the answer.