Question

please provide me MCQ with answer of science ( chemistry ) chapter - chemical reaction and equation. and pls give relavant answer of class 10th ​

Answer 1

Answer:

Class 10 Science MCQs Chapter 1 Chemical Reactions and Equations

1. Which of the following is a displacement reaction?

2. Magnesium ribbon is rubbed before burning because it has a coating of

(a) basic magnesium carbonate

(b) basic magnesium oxide

(c) basic magnesium sulphide

(d) basic magnesium chloride

3. Which of the following are exothermic processes?

(i) Reaction of water with quick lime

(ii) Dilution of an acid

(iii) Evaporation of water

(iv) Sublimation of camphor (crystals)

(a) (i) and (ii)

(b) (ii) and (iii)

(c) (i) and (iv)

(d) (ii) and (iv)

Answer 2

Answer:

The correct answers are

1. (d)
2. (b)
3. (c)
4. (a)
5. (d)

Explanation:

1. Sodium and chlorine are reacted and as a result, common salt is formed which is additionally called salt. Which option gives the reactants and products of the reaction.

(a) reactants – sodium; products – chlorine

(b) reactants – sodium and table salt; products – chlorine

(c) reactants – tables salt; products – sodium and chlorine

(d) reactants – sodium and chlorine; products – common salt

2. Which of the following reactions can even be termed a thermal decomposition reaction?

(a) Combination Reaction

(b) decomposition

(c) reaction

(d) Double displacement

3. Give the ratio during which the hydrogen and the oxygen are present in water by volume.

(a) $1:2$

(b) $1:1$

(c) $2:1$

(d) $1:8$

4. one in every of the following processes doesn't involve a chemical action, that is:

(a) Melting of candle wax when heated

(b) Burning of candle wax when heated

(c) Digestion of food in your stomach

(d) Ripening of banana

5. From the next which one is that the instance of chemical reaction?

(a) Grapes get fermented

(b) Breakdown of food

(c) Formation of curd

(d) All of the above

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