JEE Main 2022 · 25 Jun · Shift 1 · Chemistry Q65

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ChemistrySingle correct+4 / -1Question 65 of 90

Number of electron deficient molecules among the following $\mathrm{PH_3}$ , $\mathrm{B_2H_6}$ , $\mathrm{CCl_4}$ , $\mathrm{NH_3}$ , LiH and $\mathrm{BCl_3}$ is

Answer and worked solution

Official answer: C

Electron deficient molecules have fewer electrons than needed for normal two-electron bonds: $\mathrm{B_2H_6}$ and $\mathrm{BCl_3}$ . The others have complete octets (LiH is ionic).

Count 2.

(C)

Topics:Covalent bonding and Lewis structures Group 13

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JEE Main 2022 · 25 Jun · Shift 1, Chemistry question 65