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

1.

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

2.

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

3.

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

4.

Q. Digestion of food is a chemical change.

5.

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

6.

Q. Which among the following is double displacement reaction?

7.

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

8.

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

9.

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

10.

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

11.

Q. A chemical reaction involves ……

12.

Q. A balanced chemical equation always obeys ….

13.

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

14.

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

15.

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

16.

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

17.

Q. AgNO₃ + NaCl → AgCl + …….

18.

Q. The sign ↓ indicates.

19.

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

20.

Q. What is rust ?

21.

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

22.

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

23.

Q …………….. is a physical change.

24.

Q. Reaction that releases energy is called Endothermic.

25.

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