The amount of energy required to break a bond is same as the amount of energy released when the same bond is formed. In gaseous state, the energy required for homolytic cleavage of a bond is called Bond Dissociation Energy (BDE) or Bond Strength. BDE is affected by s-character of the bond and the stability of the radicals formed. Shorter bonds are typically stronger bonds. BDEs for some bonds are given below: Correct match of the C-H bonds (shown in bold) in Column J with their BDE in Column K is Column J Molecule Column II K BDE(kal mol-1) P H - CH(CH3)2 i 132 Q H - CH2Ph ii 110 R H - CH = CH2 iii 95 S H - C ≡ CH iv 88

Question

The amount of energy required to break a bond is same as the amount of energy released when the same bond is formed. In gaseous state, the energy required for homolytic cleavage of a bond is called Bond Dissociation Energy (BDE) or Bond Strength. BDE is affected by s-character of the bond and the stability of the radicals formed. Shorter bonds are typically stronger bonds. BDEs for some bonds are given below: <img class="img-fluid question-image" alt="image" src="https://cdn.tardigrade.in/img/question/chemistry/3d8c17e1040b9b6c5435e02bc7048f81-.png" /> Correct match of the C-H bonds (shown in bold) in Column J with their BDE in Column K is Column J Molecule Column II K BDE(kal mol-1) P H - CH(CH3)2 i 132 Q H - CH2Ph ii 110 R H - CH = CH2 iii 95 S H - C ≡ CH iv 88 (A) P - iii, Q - iv, R - ii, S - i (B) P - i, Q - ii, R - iii, S - iv (C) P - iii, Q - ii, R -i, S - iv (D) P - ii, Q - i, R - iv, S - iii

Tardigrade Admin · Accepted Answer

As S character increases bond dissociation energy increases <img class="img-fluid question-image" alt="image" src="https://cdn.tardigrade.in/img/question/chemistry/3509bf4eadf4d78e8b28f5381ec8d091-.png" />

$P - iii, Q - i v, R - ii, S - i$

$P - i, Q - ii, R - iii, S - i v$

$P - iii, Q - ii, R - i, S - i v$

$P - ii, Q - i, R - i v, S - iii$

As $S$ character increases bond dissociation energy increases

Column $J$ Molecule		Column II $K$ BDE( $ka l m o l^{- 1})$
P	$H - C H (C H_{3})_{2}$	i	132
Q	$H - C H_{2} P h$	ii	110
R	$H - C H = C H_{2}$	iii	95
S	$H - C \equiv C H$	iv	88

P−iii,Q−iv,R−ii,S−i

P−i,Q−ii,R−iii,S−iv

P−iii,Q−ii,R−i,S−iv

P−ii,Q−i,R−iv,S−iii

As S character increases bond dissociation energy increases

$P - iii, Q - i v, R - ii, S - i$

$P - i, Q - ii, R - iii, S - i v$

$P - iii, Q - ii, R - i, S - i v$

$P - ii, Q - i, R - i v, S - iii$

As $S$ character increases bond dissociation energy increases