Q.

Consider the following statements.I. In the CH4 molecule there are eight valence electrons available for bonding.II. Sigma molecular orbitals are symmetrical around the bond axes.III. The formation of positive and negative ions involve electron gain enthalpy.IV. Hydrogen bonding is the characterstic features of all polarmolecules.Choose the correct statement.

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a

I and II

b

Only I

c

I and IV

d

I, II and IV

answer is A.

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Detailed Solution

Statement I, II are correct.III. The formation of positive ion involves Ionization Energy.IV. Hydrogen bond occurs between any polar molecules containing an H−N, H−O, or H−F bond.
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