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4. Chemical bonding and molecular structure — Chemistry STD 11 Science — Question

Rajasthan BoardEnglish MediumSTD 11 ScienceChemistry4. Chemical bonding and molecular structure1 Mark
MCQ
Which of the following order can't be explained by back bonding ?
  • A
    $SiH_3OH > CH_3OH$  (Acidic strength)
  • B
    $O(SiH_3)_2 < O(CH_3)_2$  (Lewis basic strength)
  • C
    $BF_3 < BCl_3$  (Lewis acidic strength)
  • ✓
    $PH_4^+ > NH_3$  (Bond angle)
✓

Answer

Correct option: D.
$PH_4^+ > NH_3$  (Bond angle)
d
$PH_4^+ > NH_3$                   No. $B.B.$  concept applicable
$B.A.\Rightarrow  109.5^o > 107^o$

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