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. The sign ↓ indicates.

3.

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

4.

Q. Digestion of food is a chemical change.

5.

Q. What is rust ?

6.

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

7.

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

8.

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

9.

Q. AgNO₃ + NaCl → AgCl + …….

10.

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

11.

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

12.

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

13.

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

14.

Q. A chemical reaction involves ……

15.

Q …………….. is a physical change.

16.

Q. Which among the following is double displacement reaction?

17.

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

18.

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

19.

Q. A balanced chemical equation always obeys ….

20.

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

21.

Q. Reaction that releases energy is called Endothermic.

22.

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

23.

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

24.

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

25.

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