Given below are two statements :
Statement I : The increasing order of boiling point of hydrogen halides is .
Statement II : The increasing order of melting point of hydrogen halides is .
In the light of the above statements, choose the correct answer from the options given below :
Statement I : The increasing order of boiling point of hydrogen halides is .
Statement II : The increasing order of melting point of hydrogen halides is .
In the light of the above statements, choose the correct answer from the options given below :
- (A)Both Statement I and Statement II are true✓ Correct
- (B)Statement I is true but Statement II is false
- (C)Both Statement I and Statement II are false
- (D)Statement I is false but Statement II is true
Answer: (A)
Solution
For the hydrogen halides the boiling point is set mainly by hydrogen bonding in HF and by dispersion forces that grow with molecular size in the others, so the order is with HF highest. For the melting point the strong dispersion forces of the heavy HI outweigh the hydrogen bonding of HF, giving . The stated boiling-point order and the stated melting-point order are both correct, so both statements are true.
JEE Main · 2026 · 28 Jan 2026 · Shift 2 · Single correct option