Raw natural rubber (latex) and clay in soil is a :

When light is passed through water containing a few drops of milk, it shows a bluish tinge. This is due to the scattering of light by milk. This indicates that milk is :

Solid-liquid colloid is :

Which one of the following is not a colloid?

Collodion is a 4% solution of which one of the following in alcohol-ether mixture?

The food-borne illness causing organism often associated with small cuts and boils is

Which one of the following disease is not transmitted by a mosquito?

Which of the following is not an air-borne disease?

What precautions can you take in your school to reduce the incidence of infectious diseases?

Which of the following diseases spread through air?