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Which of the following statements are no...

Which of the following statements are not correct?

A

beryllium, like nitrogen, forms diatomic molecule `Be_2`

B

` He_2` molecule does not exist but `He_2^+` does exist

C

The dipole moment of `CH_3F` is greater than that of `CH_3 CI`

D

HBr is a stronger acid than HI because of hydrogen bonding

Text Solution

Verified by Experts

The correct Answer is:
A, C, D
`Be_2` and `He_2` molecules do not exist. `CH_3F` involves lesser C-F distance but more charge separation as compared to those in `CH_3Cl`. Here, bond distance has more dominating effect causing dipole moment of `CH_3Cl` greater than that of `CH_3F` .
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