40 ml of methane is completely burnt using 80 ml of oxygen at room temperature. The volume of gas left after cooling to room temperature is

Options

A. 40 ml of `CO_(2)` gas
B. 40 ml `CO_(2)` gas and 80 ml `H_(2)O` gas
C. 60 ml of `CO_(2)` and 60 ml `H_(2)O` gas
D. 120 ml `CO_(2)` gas

Answer

A

Explanation

`CH_(4(g)) + 2O_(2(g)) to CO_(2(g)) + 2H_(2)O_(l)`

Since the product was cooled to room temperature, water exists mostly as liquid. Hence, option (a) is correct