5) If one litre of air is passed repeatedly over heated copper and magnesium till no further reduction in volume takes place, the volume finally obtained would be approximately
a) 800 mL
b) 200 mL
c) 10 mL
d) zero
5) If one litre of air is passed repeatedly over heated copper and magnesium till no further reduction in volume takes place, the volume finally obtained would be approximately
a) 800 mL
b) 200 mL
c) 10 mL
d) zero