Question

E. Tick (✓) the most appropriate answer.
1. When diamond is heated in vacuum for a
very long time, it changes into :
(a) graphite
(b) charcoal
(b) lampblack (d) carbon dioxide
2. Fullerene molecule [Co] is named after :
(a) H.W. Kroto (b) R.F. Curl
(c) R.B. Fuller (d) R.E. Samalley
3. Graphite is used as a lubricant because it is:
(a) good conductor of heat
(b) good conductor of electricity
(c) very soft and slippery
(d) soluble in oil
4. The property due to which, the gases and
the liquids accumulate on the outer surface
of solid is called :
(a) adhesion
(b) cohesion
(c) adsorption (d) absorption
5. The property due to which an element
exhibits various physical forms which has
same chemical properties is called.
(a) isotopy
(b) allotropy
(c) atomicity (d) none of these​

Answer 1

Answer:

1.graphite

2. full

3. Soft and slippery

4. adsorption

5. allotrophy