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

1.

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

2.

Q. A balanced chemical equation always obeys ….

3.

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

4.

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

5.

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

6.

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

7.

Q …………….. is a physical change.

8.

Q. AgNO₃ + NaCl → AgCl + …….

9.

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

10.

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

11.

Q. Which among the following is double displacement reaction?

12.

Q. What is rust ?

13.

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

14.

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

15.

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

16.

Q. Reaction that releases energy is called Endothermic.

17.

Q. A chemical reaction involves ……

18.

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

19.

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

20.

Q. Digestion of food is a chemical change.

21.

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

22.

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

23.

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

24.

Q. The sign ↓ indicates.

25.

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