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Question

Which of the following has CORRECT order of their indicating properties?

A
F^CF(CH2F2)>H^CH(CH4); bond angle
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B
H3CCl>F3CCl; bond length of C-Cl
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C
(CH3)3N>(SiH3)3N; basic strength
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D
PH3>PF3; bond angle.
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Solution

The correct option is A F^CF(CH2F2)>H^CH(CH4); bond angle

Band angle depend on % S character by relation cosθ=SS1 S=% character
θα %S θ= bond angle
and more electronegative atom like Flumine (F) requires less S character as a result FPF has less S character or less bond angle and HPF bond required more S character since H is less electronegative than F. So, bond angle in HPFl is more.
Similarly we can explain for CH4&CH2F2.

983586_693911_ans_ea00e03c20c34feb961a34367c664b7e.jpg

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