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Select the correct properties for the following molecules:
(I) \( \mathrm{CH}_{2} \mathrm{~F}_{2} \)
(II) \( \mathrm{CHF}_{3} \)
(III) \( \mathrm{CH}_{3} \mathrm{~F} \)
(a) \( \mathrm{C}-\mathrm{F} \) bond length order: \( \mathrm{CH}_{3} \mathrm{~F}\mathrm{CH}_{2} \mathrm{~F}_{2}\mathrm{CHF}_{3} \)
(b) \( \mathrm{C}-\mathrm{H} \) bond length order: \( \mathrm{CH}_{3} \mathrm{~F}\mathrm{CH}_{2} \mathrm{~F}_{2}\mathrm{CHF}_{3} \)
(c) Shape is not perfect tetrahedral for given compounds
(d) Dipole moment is non-zero for given compounds
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