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

1.

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

2.

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

3.

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

4.

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

5.

Q. A balanced chemical equation always obeys ….

6.

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

7.

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

8.

Q. A chemical reaction involves ……

9.

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

10.

Q. Which among the following is double displacement reaction?

11.

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

12.

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

13.

Q. Digestion of food is a chemical change.

14.

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

15.

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

16.

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

17.

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

18.

Q. The sign ↓ indicates.

19.

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

20.

Q. What is rust ?

21.

Q. Reaction that releases energy is called Endothermic.

22.

Q. AgNO₃ + NaCl → AgCl + …….

23.

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

24.

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

25.

Q …………….. is a physical change.