MCQ
The $IUPAC$ name of compound $C{H_3} - C{(C{H_3})_2} - C{H_2} - CH = C{H_2}$ is
- A$2, 2-$dimethyl pent$-4-$ene
- B$2, 2$ dimethyl$-2-$pentene
- C$1, 1, 1-$trimethyl but$-3-$ene
- ✓$4, 4-$dimethyl pent$-1-$ene
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$AB , A _2$ and $B _2$ are diatomic molecule. If the bond enthalpies of $A _2, B _2$ and $AB$ are in the ratio $1: 0.5: 1$, then the bond enthalpy of $A_2$ is $......\,kJ\,mol ^{-1}$ (Nearest integer)

$(a)$ Polarising power of cation
$(b)$ Extent of distortion of anion
$(c)$ Polarisability of the anion
$(d)$ Polarising power of anion
When attached to $sp^3$ -hybridized carbon, their leaving group ability in nucleophilic substitution reaction decreases in the order
(Given : $R =8.3 \,J \,K ^{-1}\, mol ^{-1}$ )