English Medium Class 9 - CBSE Question Bank Solutions

____________ is the change of solid state directly to vapour state without going through the ____________ state.

The phenomenon of change of a liquid into the gaseous state at any temperature below its boiling point is called ____________.

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

Alka was making tea in a kettle. Suddenly she felt intense heat from the puff of steam gushing out of the spout of the kettle. She wondered whether the temperature of the steam was higher than that of the water boiling in the kettle. Comment.

Conversion of solid to vapour is called sublimation. Name the term used to denote the conversion of vapour to solid.

Why does the temperature of a substance remain constant during its melting point or boiling point?

An atom with 3 protons and 4 neutrons will have a valency of

Which of the following in Fig. 4.2 do not represent Bohr’s model of an atom correctly?

Why does the skin of your finger shrink when you wash clothes for a long time?

Select the incorrect sentence

Bone matrix is rich in

Which of the following helps in repair of tissue and fills up the space inside the organ?

Which of the following cells is found in the cartilaginous tissue of the body?

Which of the following does not lose their nucleus at maturity?

A nail is inserted in the trunk of a tree at a height of 1 metre from the ground level. After 3 years the nail will

Cork cells are made impervious to water and gases by the presence of

Animals of colder regions and fishes of cold water have thicker layer of subcutaneous fat. Describe why?

Lining of blood vessels is made up of ______.

Water hyacinth float on water surface. Explain.

Bone possesses a hard matrix composed of ______ and ______.