This fibre is also known as artificial silk. It is cheaper than silk and can be woven like silk fibres. What are we talking about?

Which of the following is non-biodegradable?

Which of the following is a thermosetting plastic?

The property of metals by which they can be beaten into thin sheets is called ---------------------

Among the following, the cleanest source of energy is:

When a copper vessel is exposed to moist air for long, it acquires a ----------------------------------- coating.

Which non-metal is a good conductor of electricity ?

The ash obtained on burning Magnesium ribbon is dissolved in water and tested for its acidic/basic nature. What change can be observed?

Identify the wrong statement

Which of the following is a metalloid?

Two statements are given:

Statement 1: Under high pressure and high temperature, dead plants got slowly converted into petroleum.

Statement 2: Coal was formed from organisms living in the sea

The --------------------------- temperature at which a substance catches fire is called its ignition temperature.

Which is the hottest part of the wax candle flame?

Equal mass of Wood, Petrol, Methane and Hydrogen is taken. On burning, which of these will give the highest amount of heat?