A fuel cell combines hydrogen and……..to produce electricity, heat, and water.
a) Carbon
b) Oxygen
c) Uranium
d) Silicon
Fossils are the…………………
a) Dead remains of living organism
b) coal mines
c) living beings
d) kind of natural resource
Petroleum is mixture of…………………
a) petrol
b) diesel
c) petroleum gas
d) all of these
A source of energy such as coal, oil, and natural gas is called………....energy source.
a) non-renewable
b) renewable
c) both a and b
d) none of these
Thar coal is one of the ……..largest coal reservoir in the world having a total of about……..trillion cubic feet.
a) 3rd, 750
b) 5th, 850
c) 7th, 950
d) 9th, 1050
The type of coal containing lowest carbon is:
NTS PST (A)2021 (7:30)
a) Lignite
b) Bituminous
c) Anthracite
d) Peat
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Coal forms in stages, and as it matures, its carbon content increases. The sequence from lowest to highest carbon content is: Peat → Lignite → Bituminous → Anthracite Peat has the lowest carbon content and is considered the first stage in coal formation. Anthracite has the highest carbon content and burns the cleanest. So, Peat is the correct answer. |
correct option is D
by at 2025-06-20 11:59:39