Which equation obeys the law of conservation of mass? a. 2c4h10 + 2cl2 + 12o2 7co2 + ccl4 + 10h2o b. c4h10+ cl2 + 2o2 7co2 + ccl4 + 8h2o c. 2c4h10+ 2cl2 + 12o2 4co2 + ccl4 + h2o d. 2c4h10+ 2cl2 + 6o2 co2 + ccl4 + 6h2o e. 4c4h10+ 4cl2 + 14o2 14co2 + ccl4 + 20h2o

Answer : The correct option is A.

Explanation :

Law of conservation of mass : In the chemical reaction, the mass of reactant must be equal to the mass of product.

A.

The mass of reactant side =

The mass of product side =

This means, the mass of product is equal to the mass of reactant. The mass remains conserved and obeys the law of conservation of mass.

The reaction B, C, D, E does not obey the law of conservation of mass.

Therefore, Only reaction A obey the law of conservation of mass.