40 men take 15 days to finish some work. If the work is

Deficiency of which vitamin leads to bleeding gums?

Which of the following solutions will not change the colour of blue litmus paper to red?

 1. Acid solution

2. Base solution

Tear gas used by the police to disperse the mob contains –

What happens to the gravitational force between two objects if the distance between them is doubled ?

When a detergent is added to pure water, its surface tension –

A man cannot see clearly beyond 10 meters. The disease he suffers from :

Which one of the following is a natural substitute for common sugar?

The vector of malaria is :

The ozone hole that has been detected lies in the atmosphere above –

Ohm’s law obeyed in -