_____________ has the widest inflammability limit (explosion limit) of all the gases?

Question: During the carbonisation of coal
[A].

all tar is evolved at < 600°C.

[B].

evolution of H2 and formation of methane and aromatics occur at > 700°C.

[C].

hard semi-coke starts shrinking at 600°C.

[D].

all (a), (b) and (c).

Answer: Option D

Explanation:

No answer description available for this question.

Question: __________ is used as jet engine fuel.
[A].

Petrol

[B].

Diesel

[C].

Kerosene

[D].

LPG

Answer: Option C

Explanation:

No answer description available for this question.

Question: As the equilibrium moisture content of the coal increases, its
[A].

calorific value increases.

[B].

swelling number decreases.

[C].

swelling number increases.

[D].

bulk density decreases.

Answer: Option B

Explanation:

No answer description available for this question.