SSLC (English Medium) कक्षा ८ - Tamil Nadu Board of Secondary Education Question Bank Solutions for Science

How will you prepare a china rose indicator?

Write a note on:

Litmus

Write a note on:

Phenolphthalein

Write a note on:

Methyl orange

Take some lemon juice in a tumbler and add baking soda slowly. What do you see? What do you infer from this?

Take a shirt with turmeric powder strain. Wash the shirt with soap. Do you observe any change in the colour? Why?

Take a small beetroot vegetable and cut it into pieces. Boil them in hot water and filter the extract. Take two test tubes. Take sodium hydroxide solution in one test tube and vinegar or lemon juice in another test tube. Add beetroot extract slowly. Observe the colour change. What do you infer?

Hydrogen gas obtained from natural gas is used in the production of ______.

The process of separating petroleum into useful by-products and removal of undesirable impurities is called distillation.

______ is not a fungus.

The range of audible frequency for the human ear is

Assertion: People struck by lightning receive a severe electrical shock.

Reason: Lightning carries very high voltage.

What are antagonistic muscles? Give one example.

State Pascal's law.

The number 4.582 can be rounded off as 4.58.

How many times will the ‘minute hand’ rotate in one hour?

Unit of pressure is 

Pascal’s law is used in

Hydraulic lift works under the principle of _______.

Explain the working of a periscope.