Sarthak is observing a reaction between aluminium and sulphuric acid. Before the reaction, he weighed the contents of the flask and it was X g. After the reaction, aluminium sulphide and hydrogen were formed as products. When he weighed the flask after the reaction, it was Y g (which is less than X g). Sarthak declares that the law of conservation of mass is not true. Select the correct option.

Sarthak is observing a reaction between aluminium and sulphuric acid.

1.	Sarthak is observing a reaction between aluminium and sulphuric acid. Before the reaction, he weighed the contents of the flask and it was X g. After the reaction, aluminium sulphide and hydrogen were formed as products. When he weighed the flask after the reaction, it was Y g (which is less than X g). Sarthak declares that the law of conservation of mass is not true. Select the correct option.
Answer» Sarthak is observing a reaction between aluminium and sulphuric acid. Before the reaction, he weighed the contents of the flask and it was X g. After the reaction, aluminium sulphide and hydrogen were formed as products. When he weighed the flask after the reaction, it was Y g (which is less than X g). Sarthak declares that the law of conservation of mass is not true. Select the correct option.