SSLC (English Medium) Class 8 - Tamil Nadu Board of Secondary Education Question Bank Solutions for Science

How is chlorine prepared industrially?

What are catalystic reactions?

Define the term exothermic and endothermic reactions.

What happens to the steel benches and tables during the rainy season?

Explain the process of corrosion and rusting.

Write a note on catalytic reactions.

Reason out

The speed of a certain reaction is influenced by the catalyst.

Reason out

Chlorine is produced by Brine.

The first scientific theory about atoms was given by J J. Thomson.

The chemical name of water is ______.

Acids present in fruits and vegetables are called ______ acids.

Vinegar is ______ in taste.

A salt may be ______.

Solutions of acids conduct ______.

______ change the colour of the indicators.

Which acid is present in milk?

Can we taste acids and bases to identify them?

Are all acids corrosive in nature? Name a few acids which are non-corrosive and may be part of our food.

Copper or brass cooking vessels are coated with tin metal. Why?

Take a clean test tube with a holder and pour some dilute hydrochloric acid. Add a few pieces of magnesium ribbon pieces slowly. What do you observe? Now show a burning match stick near the mouth of the test tube. Do you hear any sound? The gas burns with a pop sound. From this, it is observed that hydrogen gas has been formed due to the reaction between acid and metal.