Ncert Exercises & Solutions

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

Column I	Column II
A. Carbocation	1. Species that can receive a pair of electrons
B. Nucleophile	2. Conjunction of electrons of $C - H σ$ bond with the empty p-orbital present in adjacent positively charged carbon
C. Hyperconjugation	3. $s p^{2}$ hybridised carbon with empty p-orbital
D. Electrophile	4. Species that can donate a pair of electrons

Codes:

Options:	A	B	C	D
1.	3	4	2	1
2.	1	2	3	4
3.	1	4	3	2
4.	4	1	3	2

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