Given below are two statements:
Statement I:
The boiling points of the following hydrides of group 16 elements increases in the order - H 2 O < H 2 S < H 2 Se < H 2 Te.
Statement II:
The boiling points of these hydrides increase with increase in molar mass, In the light of the above statements, choose the most appropriate answer from the options given below:
Text Solution
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Compound Boiling point (K)
H 2 O 373
H 2 S 213
H 2 Se 232
H 2 Te 269
• The boiling points of these hybrids not exactly increases with increase in molar mass.
• H 2 O has maximum boiling point due to intermolecular hydrogen bonding.
• Boiling point increases with molar mass of the compound, but it is also get affected by hydrogen bonding.
• By considering both the factors, the correct order of boiling points of 16th group hydrides is H 2 S < H 2 Se < H 2 Te < H 2 O
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