SSLC (English Medium) कक्षा १० - Tamil Nadu Board of Secondary Education Question Bank Solutions for Science

The animals which give birth to young ones are ______

Why are the teeth of rabbits called heterodont?

Define the moment of a couple.

Differentiate convex lens and concave lens.

A piece of wire of resistance 10 ohm is drawn out so that its length is increased to three times its original length. Calculate the new resistance.

The average energy released in each fusion reaction is about ______ J.

Nuclear fusion is possible only at an extremely high temperature of the order of ____ K.

Elements having atomic number greater than 83 can undergo nuclear fusion.

Match: IV

Use the analogy to fill in the blank.

Nuclear Fusion : Extreme temperature, Nuclear Fission : _______

Mark the correct choice as

1. Assertion: Extreme temperature is necessary to execute nuclear fusion.
2. Reason: In a nuclear fusion, the nuclei of the reactants combine releasing high energy.

Coal, petroleum and natural gas are called ______ fuels.

______ is the most commonly used fuel for the production of electricity.

Which of the following is/are a fossil fuel?

1. Tar
2. Coal
3. Petroleum

Why fossil fuels are to be conserved?

Find the percentage of nitrogen in ammonia.

All ores are minerals, but all minerals cannot be called ores.

Periodical removal of one of the products of a reversible reaction increases the yield.

Differentiate reversible and irreversible reactions.

C₂H₅OH + 3O₂ → 2CO₂ + 3H₂O is a ______