Which of the following gases has the highest energy value (calorific value)?
A. hydrogen
B. LPG
C. natural gas
D. methane
Answer: Option A
A. hydrogen
B. LPG
C. natural gas
D. methane
Answer: Option A
Red phosphorus is less reactive than yellow phosphorus because
A. it is red in colour
B. it is highly polymerised
C. it is insoluble in C2H5OH
D. it is hard
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