English Medium Class 9 - CBSE Question Bank Solutions

Calculate the molecular mass of CH₃OH.

Calculate the formula unit mass of ZnO given the atomic mass of:

• Zn = 65 u
• Na = 23 u
• K = 39 u
• C = 12 u
• O = 16 u

Calculate the formula unit mass of Na₂O given the atomic mass of

• Zn = 65 u
• Na = 23 u
• K = 39 u
• C = 12 u
• O = 16 u

Calculate the formula unit mass of K₂CO₃ given the atomic mass of

• Zn = 65 u
• Na = 23 u
• K = 39 u
• C = 12 u
• O = 16 u

What are the different states in which water is found during the water cycle?

What are the desirable characters of bee varieties suitable for honey production?

What is pasturage and how is it related to honey production?

For increasing production, what is common in poultry, fisheries and bee-keeping?

Write advantages of bee keeping.

How bee colony works?

Write down the desirable characters of bee variety suitable for bee keeping.

What is pasturage?

For increasing production, what is common in poultry, fisheries and bee-keeping?

Explain the role of workers in a bee colony.

Name the Following:

ER studded with ribosomes

Write Down Two Main Functions of Endoplasmic Reticulum.

Where do lipids and proteins constituting the plasma membrane get synthesised?

Make sketch of hydrological cycle in nature.

Describe biological water cycles.

Explain water cycle in detail.