Give below are two statements:
Statement-I : Noble gases have very high boiling points.
Statement-II: Noble gases are monoatomic gases. They are held together by strong dispersion forces. Because of this they are liquefied at very low temperature. Hence, they have very high boiling points.
In the light of the above statements. choose the correct answer from the options given below:
Statement-I : Noble gases have very high boiling points.
Statement-II: Noble gases are monoatomic gases. They are held together by strong dispersion forces. Because of this they are liquefied at very low temperature. Hence, they have very high boiling points.
In the light of the above statements. choose the correct answer from the options given below:
- (A)Statement I is false but Statement II is true.
- (B)Both Statement I and Statement II are true.
- (C)Statement I is true but Statement II is false.
- (D)Both Statement I and Statement II are false.✓ Correct
Answer: (D)
Solution
Noble gases are monoatomic and are held together only by very weak instantaneous dipole-induced dipole (London dispersion) forces. Because these forces are weak, not strong, noble gases have very low boiling points, liquefying only close to absolute zero.
So Statement I (very high boiling points) is false, and Statement II is also false, since its claim of "strong dispersion forces" causing "very high boiling points" is incorrect on both counts.
So Statement I (very high boiling points) is false, and Statement II is also false, since its claim of "strong dispersion forces" causing "very high boiling points" is incorrect on both counts.
JEE Main · 2024 · 31 Jan 2024 · Shift 1 · Single correct option