MCQ
Maximum number of electrons in a subshell with l = 3 and n = 4 is ________.
- ✓14
- B32
- C16
- D12
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At $ 298 K : \Delta_{ f } H ^{\circ}\left( SnO _2( s )\right)=-581.0 kJ mol ^{-1}, \Delta_{ fH } H ^{\circ}\left( CO _2( g )\right)=-394.0 kJ mol ^{-1}$
$S ^{\circ}\left( SnO _2( s )\right)=56.0 J K ^{-1} mol ^{-1}, S ^{\circ}( Sn ( s ))=52.0 J K ^{-1} mol ^{-1}$
$S ^{\circ}( C ( s ))=6.0 J K ^{-1} mol ^{-1}, S ^{\circ}\left( CO _2( g )\right)=210.0 J K ^{-1} mol ^{-1}$
Assume that the enthalpies and the entropies are temperature independent.
| List $I$ (molecules/ions) | List $II$ (No. of lone pairs of $e ^{-}$ on central atom) |
| $A$ $IF_7$ | $I$ Three |
| $B$ $ICl^{-}_4$ | $II$ One |
| $C$ $XeF_6$ | $III$ Two |
| $D$ $XeF_2$ | $IV$ Zero |
Choose the correct answer from the options given below:
$\mathop {^ \oplus C{H_2} - CH = CH - CH = N{H_3}}\limits_{(III)} $
Which of these structures is not a valid canonical structure ?
$\mathrm{CH}_2=\mathrm{CH}-\mathrm{CH}=\mathrm{CH}-{ }^{\oplus} \mathrm{NH}_3 ;{ }^{\oplus} \mathrm{CH}_2-\mathrm{CH}=$