state gov OSSSC Junior Assistant & Panchayat Executive Officer Mock Test 2023 Current Affairs Science and Technology
With reference to Hydrogen, consider the following statements and choose the correct statement:
1
Hydrogen is the lightest and second element on the periodic table.
2
Hydrogen fuel is a zero-emission fuel burned with oxygen.
3
Hydrogen cannot be used as fuel for spacecraft propulsion.
4
The weight of hydrogen is less than air, so it is always found in its pure form.