JEE PYQ: Hydrogen Question 28
Question 28 - 2019 (11 Jan Shift 1)
The correct statements among (a) to (d) regarding $\text{H}_2$ as a fuel are: (a) It produces less pollutants than petrol. (b) A cylinder of compressed dihydrogen weighs ~30 times more than a petrol tank producing the same amount of energy. (c) Dihydrogen is stored in tanks of metal alloys like $\text{NaNi}_5$. (d) On combustion, values of energy released per gram of liquid dihydrogen and LPG are 50 and 142 kJ, respectively.
(a) (b) and (d) only (b) (a) and (c) only (c) (b), (c) and (d) only (d) (a), (b) and (c) only
Show Answer
Answer: (d)
Solution
Options (a), (b) and (c) are correct. In (d), the values are reversed: dihydrogen releases 142 kJ/g and LPG releases 50 kJ/g.
BETA
