MCQ
Which $IUPAC$ name is correct for the given compound ?
- ✓$3, 7-$ dimethyloct $-2, 6-$ dienal
- B$2, 6-$ dimethyloct $-2, 6-$ dienal $-8$
- C$7-$ formyl $-2, 6-$ dimethylhept $-2, 6-$ diene
- D$7-$ aldo $-2,6-$ dimethylhept $-2, 6-$ diene
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| List $- I$ Electronic configuration of elements |
List $- II$ $\Delta_{ i }$ in $kJ\, mol-1$ |
| $(a)$ $1 s ^{2} 2 s ^{2}$ | $(i)$ $801$ |
| $(b)$ $1 s ^{2} 2 s ^{2} 2 p ^{4}$ | $(ii)$ $899$ |
| $(c)$ $1 s^{2} 2 s^{2} 2 p^{3}$ | $(iii)$ $1314$ |
| $(d)$ $1 s ^{2} 2 s ^{2} 2 p ^{1}$ | $(iv)$ $1402$ |
Choose the most appropriate answer from the options given below
$(I)$ They have high melting points, higher than those of pure metals
$(II)$ They are very hard
$(III)$ They retain metallic conductivity
$(IV)$ They are chemically more reactive than the pure metals