We know class 10 is very important class .So we provide some extra question class 10 chemistry chapter 2 important questions .Solve these Test Paper of chemical reaction and improve your knowledge

Question 1: If a few drops of a concentrated acid accidentally spills over the hand of a student, what should be done? [NCERT Exemplar]

Question 2: Arrange the following in the increasing order of acidic strength.

Acetic acid, water and hydrochloric acid

Question 3: Two solutions X and Y have pH values of 3.0 and 9.5 respectively. Which of these will turn litmus solution from blue to red and which will turn phenolphthalein from colourless to pink?

Question 4 : Why aqueous ammonia solution considered a base although ammonia does not contain hydroxyl (OH) ion?

Question 5: Name the acid present in the following:

(i) Tomato ii) Vinegar iiii Tamarind

question 6: What is meant by water of crystallisation? Explain that the crystalline salts contain water of crystallisation. [CBSE Delhi 2016]

Question 7 Give suitable reason for the following statements:

(i) We feel burning sensation in the stomach when we overeat.

(ii) The crystals of washing soda change to white powder on exposure to air

(iii) An aqueous solution of sodium chloride is neutral but an aqueous solution of sodium carbonate is basic. [CCE 2016]

Question 8: A gas X reacts with lime water and forms a compound Y which is used as a bleaching agent in chemical industry. Identify X and Y. Give the chemical equation of the reaction involved.

Question 9: (a) A solution has a pH of 7 (seven). Explain how you would

(i) increase its pH

(ii) decrease its pH

(b) What can you say about the pH of a solution that liberate CO₂ from sodium carbonate? Write the balanced chemical equation for the reaction.

Question 10 : What are the products formed when an acid reacts with a base? What is the type of reaction? Give one example and name the salt obtained.