Some Basic Concepts Of Chemistry Question 200

Question: 12g of Mg (at. mass 24) on reacting completely with acid gives hydrogen gas, the volume of which at STP would be [CPMT 1978]

Options:

A) 22.4 L

B) 11.2 L

C) 44.8 L

D) 6.1 L

Show Answer

Answer:

Correct Answer: B

Solution:

Mg+2HClMgCl2+H2 24g Mg evolves 22.4L H2 at STP
12g Mg evolves H2 at STP 22.424×12

=11.2L at STP.



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