If two elements A and B combine to form two compounds AB and AB2, and 1g of A combines with 0.5g of B in AB, how much of B will combine with 1g of A in AB2 according to the Law of Multiple Proportions?

A mixture of $CO$ and $CO_2$ weighing 1.12 g is treated with an excess of red hot $CuO$. The $CO$ is converted to $CO_2$. The total weight of $CO_2$ produced is 1.6 g. What was the weight percentage of $CO$ in the original mixture?

Which law explains why 18g of water always decomposes into 2g of hydrogen and 16g of oxygen?

10 g of a metal oxide on strong heating gave 6.4 g of metal. If the formula of the metal oxide is $M_2O_3$, what is the atomic mass of the metal M?

When a solid vaporizes directly without melting, it is known as:

Which law implies that the mass ratio of elements in a compound is always a whole number ratio?

Which of the following reactions is not correct according to law of conservation of mass

A sample of hydrated copper sulfate ($CuSO_4 \cdot xH_2O$) weighs 25 g. Upon heating to drive off all the water, the anhydrous copper sulfate ($CuSO_4$) remaining weighs 16 g. What is the value of 'x' (the number of water molecules of crystallization)?

Which of the following postulates of Dalton's atomic theory explains the Law of Conservation of Mass?

Iron filings are added to a solution of copper sulfate. Which observation indicates a metal displacement reaction has occurred?

Which of the following reactions is the metal displacement reaction? Choose the right option.