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

Is the uniform circular motion accelerated? Give reasons for your answer.

What is meant by uniform circular motion? Give two examples of uniform circular motion.

Explain the construction and working of a hydrometer with diagram.

Heating effect of current is called ______

Name any two appliances which work under the principle of heating effect of current.

When the reflecting surface is curved outwards the mirror formed will be ______.

State whether true or false. If false, correct the statement.

The convex mirror always produces a virtual, diminished and erect image of the object.

Numerical problem.

A concave mirror produces three times magnified real image of an object placed at 7 cm in front of it. Where is the image located? (Ans: 21 cm in front of the mirror)

State whether true or false. If false, correct the statement.

ISS is a proof for international cooperation- 

Discuss the benefits of ISS.

______ is essential to perform separation by solvent extraction method.

State whether true or false. If false, correct the statement.

Alloys bear the characteristics of both metals and nonmetals.

Why are one-time use and throwaway plastics harmful?

Higher Order Thinking Skill.

Explain how dioxins are formed? Which plastic type they are linked to and why they are harmful to humans?

Higher Order Thinking Skill.

Yugaa wants to buy a plastic water bottle. She goes to the shop and sees four different kinds of plastic bottles with resin codes 1, 3, 5 and 7. Which one should she buy? Why?

Which of the following does not contain natural dyes?

Indigo is a ______ dye.

Explain the types of dyes based on their method of application.

Ctenidia are respiratory organs in ______.

State whether true or false. If false, correct the statement.

Bipinnaria is the larva of Mollusca.