| 1 |
Heating of solid potassium chlorate produces a gas. |
- A. Chlorine
- B. Carbon dioxide
- C. Carbon mono oxide
- D. Oxygen
|
| 2 |
During a chemical reaction, total mass of the product is equal to the total mass of reactants, this is a statements of. |
- A. Law of conservation of momentum
- B. Law of conservation of energy
- C. Law of conseration of mass
- D. Law of conseration of acceleration
|
| 3 |
The reaction between calcium oxide and carbon dioxide to form calcium carbonate is an example of. |
- A. Decomposition reaction
- B. Addition reaction
- C. Acid-Base reaction
- D. Neutralizaion reaction
|
| 4 |
The product fo the reaction between zinc and dilute sulphuric acid are. |
- A. Zinc oxide and water
- B. Zinc sulphide and water
- C. Zinc sulphate and hydrogen
- D. Zinc sulphide and hydrogen
|
| 5 |
Fire works is an example of ........... reactions. |
- A. Addition
- B. Exothermic
- C. Endothermic
- D. Decomposition
|
| 6 |
Law of conservation of mass put forward in. |
- A. 1783
- B. 1784
- C. 1785
- D. 1786
|
| 7 |
Exothermic reaction ae those reactions durng which heat is. |
- A. Given out
- B. Remain same
- C. Absorbed
- D. Used
|
| 8 |
Substancs whihc take part in a chemical reaction are called. |
- A. Products
- B. Ractants
- C. Elements
- D. Compunds
|
| 9 |
How many oxygen atoms are present in onw molecule of Mg(HCO3)2 |
|
| 10 |
Law fo conservation of mass was put forward by |
- A. Newton
- B. Plank's
- C. Lavoisier
- D. Einstein
|
