Consider the following statement(s) for C∙H3=X and C∙F3=Y(I) When X dimerizes bond angle decreases(II) When X dimerizes bond angle increases(III) In X – Y molecule C – C bond length is less than that in Y – Y molecule(IV) Bond angle in X is greater than that in Y.Pick the incorrect statements.

Consider the following statement(s) for CH3=X and CF3=Y

(I) When X dimerizes bond angle decreases

(II) When X dimerizes bond angle increases

(III) In X - Y molecule C - C bond length is less than that in Y - Y molecule

(IV) Bond angle in X is greater than that in Y.

Pick the incorrect statements.

  1. A

    II, III

  2. B

    I, II, III

  3. C

    I, IV

  4. D

    II, III, IV

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    Solution:

    In CH3 bond angle 1200 sp2-hybridisation.

    In CF3 bond angle < 1090 sp3-hybridisation.

    In C2H6 carbon is sp3 hybrid so bond angle decreases to 1090.

     

    so bond length decreases in C2F6.

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