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

1.

Q. What is rust ?

2.

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

3.

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

4.

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

5.

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

6.

Q. A balanced chemical equation always obeys ….

7.

Q. A chemical reaction involves ……

8.

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

9.

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

10.

Q. The sign ↓ indicates.

11.

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

12.

Q. Digestion of food is a chemical change.

13.

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

14.

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

15.

Q. AgNO₃ + NaCl → AgCl + …….

16.

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

17.

Q. Which among the following is double displacement reaction?

18.

Q. Reaction that releases energy is called Endothermic.

19.

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

20.

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

21.

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

22.

Q …………….. is a physical change.

23.

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

24.

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

25.

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