Ncert Exercises & Solutions

Match the terms mentioned in Column I with the terms in Column II.

	Column I(Term)		Column II (Definition)
A.	Carbocation	(i).	Species that can receive a pair of electrons.
B.	Nucleophile	(ii).	Conjunction of electrons of \(C-H ~\sigma-\) bond with the empty p-orbital present in adjacent positively charged carbon.
C.	Hyperconjugation	(iii).	sp² hybridised carbon with empty p-orbital.
D.	Electrophile	(iv).	Species that can donate a pair of electrons.

Codes:

Options:	A	B	C	D
1.	(iii)	(iv)	(ii)	(i)
2.	(i)	(ii)	(iii)	(iv)
3.	(i)	(iv)	(iii)	(ii)
4.	(iv)	(i)	(iii)	(ii)

Hint: Electrophile is an electron-deficient species

Column I	Column II	Explanation
A. Carbocation	sp² hybridised carbon with empty p-orbital	H₃C⁺ is carbocation. Loss of e- makes it's p-orbitals empty (sp²-hybridised carbon)
B. Nucleophile	Species that can supply a pair of electrons.	Nucleus loving i.e., having negative charge or excess of electrons
C. Hyperconjugation	Conjugation of electrons of C-H $σ$ bond with empty p-orbital present at adjacent positively charged carbon
D. Electrophile	Species that can receive a pair of electrons	Electron loving i.e., positive charge or lack of electrons