English Medium Class 9 - CBSE Question Bank Solutions

Why did Rutherford select a gold foil in his α–ray scattering experiment?

Rutherford’s α-particle scattering experiment led to the discovery of the ———

Enlist the conclusions drawn by Rutherford from his α-ray scattering experiment.

In what way is the Rutherford’s atomic model different from that of Thomson’s atomic model?

What were the drawbacks of Rutherford’s model of an atom?

Why do we hear the sound produced by the humming bees while the sound of vibrations of the pendulum is not heard?

We should not allow mosquitoes to breed in our surroundings because they

Vectors can be defined as

Xanthium and Parthenium are commonly known as ______

Which separation technique will you apply for the separation of the following?

Oil from water.

Write down the name of a compound represented by the following formula:

Al₂(SO₄)₃

Write down the name of a compound represented by the following formula:

K₂SO₄

Write down the name of a compound represented by the following formula:

CaCl₂

Write down the name of a compound represented by the following formula:

KNO₃

Write down the name of a compound represented by the following formula:

CaCO₃

Give the name of the element present in the following compound:

Quick lime

Give the name of the element present in the following compound: 

Hydrogen bromide

Give the name of the element present in the following compound: 

Baking powder

Give the name of the element present in the following compound: 

Potassium sulphate

Calculate the number of molecules of sulphur (S₈) present in 16 g of solid sulphur.