A barometer is kept inside a bell jar. Air is slowly pumped out of the jar.

While ascending a hill, the driver of the vehicle keeps the gear ratio

Which among the given is a supercooled liquid -

In a chemically pure state, diamonds are

Consider the following statements:
1. Anti-lock Braking System (ABS) helps the rider to maintain stability while applying brakes
2. Combined Braking System (CBS) has the same functionality as ABS, the only difference being that applying one of the brake levers applies both front and rear brakes

Which of the statements above is/are incorrect?

Which among the given is used to increase the anti-knocking property of petrol

With reference to the usefulness of the by-products of sugar industry, which among the given statements is/are right? 1. Bagasse can be used as biomass fuel for the generation of energy. 
2. Molasses can be used as one of the feedstocks for the production of synthetic chemical fertilizers. 
3. Molasses can be used for the production of ethanol. Select the right answer using the codesgiven below

The colour of violet glass is due to the presence of

The green colour seen in firework displays is due to the chloride salt of:

Removal of carbon particles from air involves the principle of