Which of the following is the best example of law of conservation of m

1.	Which of the following is the best example of law of conservation of mass [NCERT 1975]
A.	12 g of carbon combines with 32 g of oxygen to form 44 g of \[C{{O}_{2}}\]
B.	When 12 g of carbon is heated in a vacuum there is no change in mass
C.	A sample of air increases in volume when heated at constant pressure but its mass remains unaltered
D.	The weight of a piece of platinum is the same before and after heating in air
Answer» B. When 12 g of carbon is heated in a vacuum there is no change in mass

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Which of the following is the best example of law of conservation of mass [NCERT 1975]

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