Q5 / 150 · MHT CET 2026 (16 April Shift 2) · Chemistry
Which of the following statements is NOT correct regarding dihydrogen?
- AIt is colorless and tasteless gas.
- BIt burns with a pale blue flame.
- Correct answerCIt is a polar water-soluble gas.
- DIt is lighter than air.
Solution
Dihydrogen ($H_2$) is a homonuclear diatomic molecule, meaning both atoms have the same electronegativity. Therefore, it is a non-polar molecule.
Since water is a polar solvent, dihydrogen is practically insoluble in water due to the "like dissolves like" principle.
Dihydrogen is a colorless, odorless, and tasteless gas. It is lighter than air and burns with a pale blue flame.
Thus, the statement that it is a polar water-soluble gas is incorrect.
Answer: It is a polar water-soluble gas.
Since water is a polar solvent, dihydrogen is practically insoluble in water due to the "like dissolves like" principle.
Dihydrogen is a colorless, odorless, and tasteless gas. It is lighter than air and burns with a pale blue flame.
Thus, the statement that it is a polar water-soluble gas is incorrect.
Answer: It is a polar water-soluble gas.
Hence, the correct answer is option: 'C'.