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Basics of Organic Chemistry question

2021 · Shift 2 · Q13
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Basics of Organic Chemistry question

2021 · Shift 2 · Q13

JEE AdvancedChemistryBasics of Organic ChemistryMCQ+3 / −1
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 : JEE Advanced 2021 Paper 2 Online Chemistry - Basics of Organic Chemistry Question 25 English ComprehensionCorrect match of the C-H bonds (shown in bold) in Column J with their BDE in Column K is

Column J
Molecule		 Column K
BDE (kcal mol−1mo{l^{ - 1}}mol−1)
(P) H-CH(CH3C{H_3}CH3​) 2 (i) 132
(Q) H-CH 2 Ph (ii) 110
(R) H-CH=CH 2 (iii) 95
(S) H-C ≡\equiv≡ CH (iv) 88
  1. A
    P - iii, Q - iv, R - ii, S - i
  2. B
    P - i, Q - ii, R - iii, S - iv
  3. C
    P - iii, Q - ii, R - i, S - iv
  4. D
    P - ii, Q - i, R - iv, S - ii
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