The symbol of which of the following elements is derived from its Latin name ?

1. Cobalt
2. Copper
3. Calcium
4. Chlorine

The metal which is not a good conductor of electricity is:

1. silver
2. aluminium
3. copper
4. tungsten

From the list given below, select the correct substance which is most suitable to the given statements

(oxygen, diamond, zinc, graphite, gold)

(a) A metal which is brittle.

(b) A non-metal which is a good conductor of electricity.

(c) The hardest naturally occurring substance.

(d) The most ductile metal.

(e) A gaseous non-metal.

Classify the following substances into elements and compounds.

Mercury, sulphur, sugar, water, sand, gold, carbon, oxygen, alcohol, iron, marble, baking soda.