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

1.

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

2.

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

3.

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

4.

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

5.

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

6.

Q. Reaction that releases energy is called Endothermic.

7.

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

8.

Q. What is rust ?

9.

Q. The sign ↓ indicates.

10.

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

11.

Q …………….. is a physical change.

12.

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

13.

Q. Which among the following is double displacement reaction?

14.

Q. A chemical reaction involves ……

15.

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

16.

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

17.

Q. AgNO₃ + NaCl → AgCl + …….

18.

Q. Digestion of food is a chemical change.

19.

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

20.

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

21.

Q. A balanced chemical equation always obeys ….

22.

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

23.

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

24.

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

25.

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