In X- H --- Y, X and Y both are electronegative elements:

electro density on X will increase and on H will decrease

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in both electron density will increase

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in both electron density will decrease

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on X electron density will decrease and on H increases

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Solution

The correct option is A electro density on X will increase and on H will decrease
In X-H---Y,
'H' is directly bonded to 'X' and there is a hydrogen bond between 'H' and 'Y'. As 'X' and "Y' are electronegative elements that pull electron density towards themselves. As 'X' is directly bonded, it pulls more electron density. So electron density on X increases on 'H' electron density decreases.

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