For preparation of porous bearings by powder metallurgy, preferred particle shape is

Question: Low temperature oxidation of stored coal results in the
[A].

decrease in its caking power & calorific value.

[B].

decrease in its carbon & hydrogen content.

[C].

increase in its oxygen content.

[D].

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

Answer: Option D

Explanation:

No answer description available for this question.