English Medium कक्षा १० - CBSE Question Bank Solutions

Which of the following elements would yield an acidic oxide?

Na, S, C, K, H

Which of the following elements would yield a basic oxide?

Na, S, C, K, H

Which of the following elements would yield a neutral oxide?

Na, S, C, K, H

What is the nature of the oxide Na₂O? What happens when it is dissolved in water? Write the chemical equation of the reaction involved.

What type of oxides are formed when non-metals react with oxygen? Explain with an example.

What type of oxides are formed when metals combine with oxygen? Explain with the help of an example.

Explain why, metals usually do not liberate hydrogen gas with dilute nitric acid.

Name two metals which can, however, liberate hydrogen gas from very dilute nitric acid.

How do metals react with hydrogen? Explain with an example.

How do non-metals react with hydrogen? Explain with an example.

What happens when calcium reacts with chlorine? Write an equation for the reaction which takes place.

What happens when magnesium reacts with very dilute nitric acid? Write an equation for the reaction involved.

Arrange the following metals in order of their chemical reactivity, placing the most reactive metal first:

Magnesium, Copper, Iron, Sodium, Zinc, Lead, Calcium

What happens when a rod of zinc metal is dipped into a solution of copper sulphate? Give chemical equation of the reaction involved.

A copper plate was dipped in AgNO₃ solution. After certain time, silver from the solution was deposited on the copper plate. State the reason why it happened. Give the chemical equation of the reaction involved.

Why does aluminium not react with water under ordinary conditions?

Name two metals which cannot displace hydrogen from dilute acids.

Why is white phosphorus kept immersed under water?

Can we keep sodium immersed under water? Why?

Describe the reaction of potassium with water. Write the equation of the reaction involved.