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

1.

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

2.

Q. Digestion of food is a chemical change.

3.

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

4.

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

5.

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

6.

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

7.

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

8.

Q. The sign ↓ indicates.

9.

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

10.

Q. A chemical reaction involves ……

11.

Q. A balanced chemical equation always obeys ….

12.

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

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. What is rust ?

15.

Q …………….. is a physical change.

16.

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

17.

Q. Which among the following is double displacement reaction?

18.

Q. AgNO₃ + NaCl → AgCl + …….

19.

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

20.

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

21.

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

22.

Q. Reaction that releases energy is called Endothermic.

23.

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

24.

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

25.

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