English Medium Class 9 - CBSE Question Bank Solutions for Science

The valencies (or charges) of some of the ions are given below : 

Using this information, write down the formulae of the following compounds :
(i) Sodium phosphate
(ii) Ammonium sulphate
(iii) Calcium hydroxide
(iv) Lead bromide 

‘Osmosis is a special kind of diffusion’. Comment.

The electron distribution in an aluminium atom is

Write down the electron distribution of chlorine atom. How many electrons are there in the L shell? (Atomic number of chlorine is 17).

The electronic configuration of silicon is ——— and that of sulphur is ———.

Which of these is not related to endoplasmic reticulum?

The undefined nuclear region of prokaryotes are also known as

Name the organelles which show the analogy written as under

Storage sacs of the cell——

How do substances like carbon dioxide (CO₂) and water (H₂O) move in and out of the cell?

Draw a well labelled diagram of a eukaryotic nucleus. How is it different from nucleoid?

Which muscles act involuntarily?

1. Striated muscles
2. Smooth muscles
3. Cardiac muscles
4. Skeletal muslces

Contractile proteins are found in

Voluntary muscles are found in

The muscular tissue which function throughout the life continuously without fatigue is

Match the column (A) with the column (B)

Differentiate between voluntary and involuntary muscles. Give one example of each type.

Differentiate the following activities on the basis of voluntary (V) or involuntary (IV) muscles.

Writing with hand

Differentiate the following activities on the basis of voluntary (V) or involuntary (IV) muscles.

Movement of chocolate in your intestine

Lining of small intestine is made up of ______.

Lining of kidney tubules is made up of ______.