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From the species Cl2O, P(CH3)3, N(CH3)3, ClO2-, CH3 (methyl radical) and NCl3, how many are planar molecules?

1. 1
2. 2
3. 3
4. 4

Correct answer: 3

Solution

Cl2O (bent), ClO2- (bent) and the CH3 radical (trigonal planar) are planar, giving 3; P(CH3)3, N(CH3)3 and NCl3 are pyramidal and non-planar.

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