HARD
10th CBSE
IMPORTANT
Earn 100

What change in colour is observed when white silver chloride is left exposed to sunlight? State the type of chemical reaction in this change.

Important Questions on Chemical Reactions and Equations

MEDIUM
10th CBSE
IMPORTANT
Core Science Chemistry>Chapter 1 - Chemical Reactions and Equations>EXERCISE 1B>Q 4
Why is respiration considered an exothermic process?
HARD
10th CBSE
IMPORTANT
Core Science Chemistry>Chapter 1 - Chemical Reactions and Equations>EXERCISE 1B>Q 5
By adding dilute hydrochloric acid to copper oxide powder. The solution formed is bluish green. Predict the new compound formed that imparts the colour to the solution.
MEDIUM
10th CBSE
IMPORTANT
Core Science Chemistry>Chapter 1 - Chemical Reactions and Equations>EXERCISE 1B>Q 6
In electrolysis of water, why is the volume of hydrogen collected over one electrode double than that of the gas collected over other electrode.
MEDIUM
10th CBSE
IMPORTANT
Core Science Chemistry>Chapter 1 - Chemical Reactions and Equations>EXERCISE 1B>Q 7
Why do we store silver chloride in dark coloured bottles?
MEDIUM
10th CBSE
IMPORTANT
Core Science Chemistry>Chapter 1 - Chemical Reactions and Equations>EXERCISE 1B>Q 1
A silver article generally turns black when kept in open for few days. The article when rubbed with toothpaste again starts shining.

Why do sliver articles turn black when kept in the open for a few days? Name the phenomenon involved.
MEDIUM
10th CBSE
IMPORTANT
Core Science Chemistry>Chapter 1 - Chemical Reactions and Equations>EXERCISE 1B>Q 1
A silver article generally turns black when kept in open for few days. The article when rubbed with toothpaste again starts shining.

Name the black substance formed and give its chemical formula.
MEDIUM
10th CBSE
IMPORTANT
Core Science Chemistry>Chapter 1 - Chemical Reactions and Equations>EXERCISE 1B>Q 2
A magnesium ribbon is burnt in oxygen to give a white compound X accompanied by emission of light. If the burning ribbon is now placed in an atmosphere of nitrogen, it continues to burn and forms a compound Y.

Write the chemical Formula of X and Y.
MEDIUM
10th CBSE
IMPORTANT
Core Science Chemistry>Chapter 1 - Chemical Reactions and Equations>EXERCISE 1B>Q 2
A magnesium ribbon is burnt in oxygen to give a white compound X accompanied by emission of light. If the burning ribbon is now placed in an atmosphere of nitrogen, it continues to burn and forms a compound Y.
Write a balanced chemical equation, when X is dissolved in water