4AB › Chemistry PYQ › CSIR-NET › June 2011 › Q79Q79 · CSIR-NET Chemistry, June 2011 Paper: CSIR-NET June 2011 · Subject: Inorganic Chemistry · Chapter: Main Group Elements · Topic: Main Group Elements – General · Marks: 2 · Difficulty: Hard
The correct order of stability of difluorides is:
(a) $\mathrm{GeF}_{2}>\mathrm{SiF}_{2}>\mathrm{CF}_{2}$
(b) $\mathrm{CF}_{2}>\mathrm{SiF}_{2}>\mathrm{GeF}_{2}$
(c) $\mathrm{SiF}_{2}>\mathrm{GeF}_{2}>\mathrm{CF}_{2}$
(d) $\mathrm{CF}_{2}>\mathrm{GeF}_{2}>\mathrm{SiF}_{2}$
Answer Answer: A ✓ checked by 4AB · confidence medium
The source book printed B; on checking, A is correct — see the explanation.
Book printed (b).
Explanation Stability of divalent group-14 fluorides rises down the group: GeF₂ > SiF₂ > CF₂ (a).
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