Amongst $H_{2} O, H_{2} S, H_{2} Se and H_{2} Te$ , the one with the highest boiling point is

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H₂O because of hydrogen bonding

H₂Te because of higher molecular weight

H₂Se because of lower molecular weight

H₂S because of hydrogen bonding

answer is A.

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Detailed Solution

The boiling point of a compound depends on various factors, including intermolecular forces, molecular weight, and polarity.

Out of the given options, water (H₂O) has the highest boiling point. This is because water is a polar molecule with hydrogen bonding between the molecules. Hydrogen bonding is a strong intermolecular force that requires a large amount of energy to break the bonds between the molecules. In comparison, the other hydrides, H₂S, H₂Se, and H₂Te, are non-polar molecules and do not have hydrogen bonding. Therefore, they have lower boiling points than water.

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