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Explosion limit of blast furnace gas is 37 to 71% gas in gas-air mixture. It means that the blast furnace gas will explode when burnt in a confined space, if its concentration in the gas-air mixture is __________ percent. | |
A. | < 37% [Wrong Answer] |
B. | >71% [Wrong Answer] |
C. | in between 37 & 71% [Correct Answer] |
D. | none of these [Wrong Answer] |