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

1.

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

2.

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

3.

Q. A balanced chemical equation always obeys ….

4.

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

5.

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

6.

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

7.

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

8.

Q. AgNO₃ + NaCl → AgCl + …….

9.

Q. What is rust ?

10.

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

11.

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

12.

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

13.

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

14.

Q. Digestion of food is a chemical change.

15.

Q. Which among the following is double displacement reaction?

16.

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

17.

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

18.

Q …………….. is a physical change.

19.

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

20.

Q. A chemical reaction involves ……

21.

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

22.

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

23.

Q. Reaction that releases energy is called Endothermic.

24.

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

25.

Q. The sign ↓ indicates.