SSLC (English Medium) Class 9 - Tamil Nadu Board of Secondary Education Question Bank Solutions for Science

Higher Order Thinking Skill.

The doctor advices an adolescent girl who is suffering from anaemia to include more of leafy vegetables and dates in her diet. Why so

Explain the dangers of electricity and precautions to be taken while handling electricity.

A ray of light as it travels from medium A to medium B refractive index of the medium B relative to medium A is (μB/ μA) ______.

The pencil appears to be bent at the surface of the water due to refraction.

Give two examples of transparent mediums that are denser than air.

A coin in a glass beaker appears to rise as the beaker is slowly filled with water why?

Human beings cannot hear ______.

The frequency greater than 20,000 Hz is ______ sound.

Sonar is a device that uses to ______ measure the distance, direction, and speed of underwater objects.

Ultrasounds can also be used to detect cracks and flaws in ______.

Ultrasonic sounds cannot be heard by Human beings.

Mention the frequency ranges of infrasonic and ultrasonic.

When the solid (Solute) dissolves in a liquid (Solvent), it becomes a solution.

______ is the major difference between true solutions, suspensions, and colloids.

What do you understand by the term solute with reference to a solution?

What is the solvent?

State the law of reciprocal proportion.

Prove that in the following example, Sulphur and Oxygen combine using the law of reciprocal proportions.

Correct the wrong statement given below:

Magnesium hydroxide is used in whitewashing buildings.

Give the sequence of the events occurring during the prophase of mitosis.