HARD
10th CBSE
IMPORTANT
Earn 100

On adding a drop of barium chloride solution to an aqueous solution of sodium sulphite. A white precipitate is obtained.
(A) Write a balanced chemical equation of the reaction involved.

(B) What other name can be given to this precipitation reaction?

(C) On adding dilute hydrochloric acid to the reaction mixture, the white precipitate disappears. Why?

Important Questions on Chemical Reactions and Equations

MEDIUM
10th CBSE
IMPORTANT
Core Science Chemistry>Chapter 1 - Chemical Reactions and Equations>EXERCISE 1B>Q 5
Give an example of a decomposition reaction. Describe an activity to illustrate such a reaction by heating:
MEDIUM
10th CBSE
IMPORTANT
Core Science Chemistry>Chapter 1 - Chemical Reactions and Equations>EXERCISE 1B>Q 6
State any two observations in an activity which may suggest that a chemical reaction has taken place. Give examples to support your answer
MEDIUM
10th CBSE
IMPORTANT
Core Science Chemistry>Chapter 1 - Chemical Reactions and Equations>EXERCISE 1B>Q 7
What is the colour of ferrous sulphate crystals? How does this colour change on heating?
MEDIUM
10th CBSE
IMPORTANT
Core Science Chemistry>Chapter 1 - Chemical Reactions and Equations>EXERCISE 1B>Q 7
Name the products formed on strongly heating of ferrous sulphate crystal. What type of chemical reaction occurs in this change.
HARD
10th CBSE
IMPORTANT
Core Science Chemistry>Chapter 1 - Chemical Reactions and Equations>EXERCISE 1B>Q 8

(i) What is observed when a solution of potassium iodide is added to a solution of lead nitrate in a test tube?
(ii) What type of reaction is this?
(iii) Write a balanced chemical equation to represent the above reaction.

MEDIUM
10th CBSE
IMPORTANT
Core Science Chemistry>Chapter 1 - Chemical Reactions and Equations>EXERCISE 1B>Q 9
What is an oxidation reaction? Give an example of oxidation reaction. Is an oxidation reaction exothermic or endothermic in nature.
EASY
10th CBSE
IMPORTANT
Core Science Chemistry>Chapter 1 - Chemical Reactions and Equations>EXERCISE 1B>Q 1

Give examples of articles made from iron, which are protected from rusting by:

Red lead paint
Paint

EASY
10th CBSE
IMPORTANT
Core Science Chemistry>Chapter 1 - Chemical Reactions and Equations>EXERCISE 1B>Q 1
Give examples of articles made from iron, which are protected from rusting by:
Enamelling
Plastic coating