Loan repayment by instalment payments is called as

Water gets cooled, when ice is immersed in it, this phenomenon is known as

Red light is used for signals because it has –

Among the following, which has the lowest density?

What term describes the resistance of an object to changes in its state of motion or rest?

A concave lens has a focal length 15 cm. If the object is placed at 30 cm from the lens, what is the image distance?

Temperature of the Sun is measured by?

Which Vitamin is soluble in water?

 Photovoltaic cells are: 

How much time does a Geostationary satellite take to complete one orbit, at the height of 35790 km?

Which atmospheric layer contains ozone layer?