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

1.

Q. A balanced chemical equation always obeys ….

2.

Q. Digestion of food is a chemical change.

3.

Q. Reaction that releases energy is called Endothermic.

4.

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

5.

Q. A chemical reaction involves ……

6.

Q …………….. is a physical change.

7.

Q. AgNO₃ + NaCl → AgCl + …….

8.

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

9.

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

10.

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

11.

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

12.

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

13.

Q. What is rust ?

14.

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

15.

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

16.

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

17.

Q. Which among the following is double displacement reaction?

18.

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

19.

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

20.

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

21.

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

22.

Q. The sign ↓ indicates.

23.

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

24.

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

25.

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