Law of Conservation of Mass

Q.

According to law of conservation of mass, during a chemical reaction:

1. that matter cannot be created but destroyed in a chemical reaction.

2. that matter can be created but not destroyed in a chemical reaction.

3. that matter can neither be created nor be destroyed in a chemical reaction.

4. that matter can be created as well as destroyed in a chemical reaction.

Q. In complete combustion of carbon, of oxygen combines with 12 g carbon to produce 44 g of carbon dioxide.

1. 46 g
2. 32 g
3. 96 g
4. 36 g

Q.

According to __________, during a chemical reaction, the total mass of the products remains equal to that of reactants

1. law of multiple proportions

2. law of conservation of mass

3. law of constant proportions

4. avogadro's law

Q. Which of the following chemical equation satisfies the law of conservation of mass?

1. 
   

2. 
   

3. 
   

4. 
   

Q. In a chemical reaction, reactant A gets converted to B and C as shown below.
A $\to$ B + C

If the masses of A and C are 40 g and 10 g respectively, the mass of B will be ______.

1. 20.5 g
2. 28 g
3. 30 g
4. 18 g

Q. How much amount of $N{H}_3$ is produced when 28 g of nitrogen react with 6 g of hydrogen?

1. 28 g
2. 6 g
3. 34 g
4. 32.5 g

Q. In a chemical reaction, the total mass of the reactants is 50 g. What will be the total mass of the products formed?

1. 40 g
2. 100 g
3. 50 g
4. 25 g

Q. In the chemical reaction shown below, the mass of water formed is _______.

Acid + Base $\to$ Salt + Water
35 g 40 g 57 g ?

1. 20
2. 24.5
3. 16.25
4. 18

Q. Matter is always destroyed during a chemical reaction.

1. True
2. False

Q. A balanced chemical equation is in accordance with _________.

1. law of conservation of mass
2. law of multiple proportion
3. Avogadros law
4. law of constant proportion