SSLC (English Medium) Class 10 - Tamil Nadu Board of Secondary Education Question Bank Solutions for Science

When is World Menstrual Hygiene Day observed?

What are the functions of blood?

Power of a lens is – 4D, then its focal length is

According to Rayleigh’s scattering law, the amount of scattering of light is inversely proportional to the fourth power of its ______.

The power of lens depends on the focal length of the lens

Increase in the converging power of eye lens cause ‘hypermetropia'

Match the following:

Assertion and reasoning type

1. Assertion: Myopia is due to the increase in the converging power of eye lens.
2. Reason: Myopia can be corrected with the help of concave lens.

LED stands for ______.

______ is an important metal to form an amalgam.

An alloy is a heterogenous mixture of metals.

A is a silvery-white metal. A combines with O₂ to form B at 800°C, the alloy of A is used in making the aircraft. Find A and B.

Apparent weight of a person is always equal to his actual weight

There is no gravity in the orbiting space station around the Earth. So the astronauts feel weightlessness.

Assertion: Energy-efficient bulbs like CFL must be used to save electric energy.

Reason: CFL bulbs are costlier than ordinary bulbs, hence using ordinary bulbs can save our money

Value based question

How would you dispose the following wastes? 

1. Domestic wastes like vegetable peels
2. Industrial wastes like metallic cans Can the disposal protect the environment? How?

The process of coating the surface of the metal with a thin layer of zinc is called ______

What is rust?

Give the equation for the formation of rust.

State two conditions necessary for rusting of iron.