Quiz -MCQ-1-Class-10-Science-1-Chapter-3-Chemical Reactions-Maharashtra Board

1.

Q. When sulphuric acid is poured over zinc, which of the following gas is formed?

2.

Q. The reaction in which oxygen is added to the substance is called ……. reaction.

3.

Q. A catalyst slows down the rate of reaction to make a better product.

4.

Q. The chemical reaction in which heat is absorbed is called ……. reaction.

5.

Q. Oily food kept out for few days gives a bad taste and a bad smell because of ……….

6.

Q. Which among the following is double displacement reaction?

7.

Q. Double displacement reaction in which an insoluble salt is formed is also called ……. reaction.

8.

Q. When acids and alkalis react together, ……. and …….. is formed.

9.

Q. The reaction in which heat is given out along with products is known as ……. reaction.

10.

Q. A chemical reaction involves ……

11.

Q. Which of the following is formed when Sodium hydroxide reacts with hydrochloric acid ?

12.

Q. Digestion of food is a chemical change.

13.

Q. The reaction of a vegetable oil with hydrogen gas takes place in the presence of ……. as a catalyst to form vanaspati ghee.

14.

Q. The sign ↓ indicates.

15.

Q. The reaction CaCO₃ → CaO + CO₂ is a ……….. reaction.

16.

Q. Reaction that releases energy is called Endothermic.

17.

Q …………….. is a physical change.

18.

Q. A balanced chemical equation always obeys ….

19.

Q. Antioxidants are used to prevent ………….. of food containing fats and oils.

20.

Q. Rancidity in the food stuff cooked in oil or ghee is prevented by using ………

21.

Q. What is rust ?

22.

Q. AgNO₃ + NaCl → AgCl + …….

23.

Q. In the reaction given CuO_(s) + H_2(g) → Cu_(s) + H₂O_(l). Copper oxide is ……. and hydrogen is …….

24.

Q. Heating of sugar is called a ……… reaction.

25.

Q. Because of the formation of which of the following, lime water turns milky when carbon dioxide is passed through it?