question_answer

A current of dry air was bubbled through two bulbs, first containing 26.66 g of an organic substance in 200 g of water, second containing pure water and a tube containing fused \[CaC{{l}_{2}}\]. The loss of weight of water bulb = 0.0870 g and the gain of the weight of \[CaC{{l}_{2}}\] tube = 2.036 g. The molecular weight of the organic substance is

A)  56                   

B)  41

C)  78                   

D)  67