Fill in the blanks: a. Phosphorus is a very _________non-metal. b. Metals are ________ conductors of heat and _________.

(b) calcium and phosphorus

(c) either metals or non-metals 

(a) Iodine  (b) Bromine  (c) Graphite  (d) Carbon  (e) Sulphur, phosphorus  (f) Oxygen

(a) Fossil fuels are coal, petroleum and natural gas.  (b) Process of separation of different constituents from petroleum is called refining.  (c) Least polluting fuel for vehicles is CNG.

[Hint : Because it have polymeric structure consisting chains of P4 tetrahedra, hence denser than white P while red P is not having angular strain as in white P, hence...

The art form which observed carefully and tried to capture exactly what the eye saw is called _________. Answer: realistic The style of painting which showed Indian landscape as a quaint, unexplored land...

Subjects that were placed on the Union List were _________, _________ and _________. Answer: taxes, defence and foreign affairs Subjects on the Concurrent List were _________ and _________. Answer: forests and agriculture Economic planning by which...

(a) silk, wool (b) cocoons, moth (c) hair (d) air, conductor

(a) The main steps of nutrition in humans are ingestion, digestion, absorption, assimilation and egestion. (b) The largest gland in the human body is liver. (c) The stomach releases hydrochloric acid and...

 (b) White phosphorus exists as P4 tetrahedral molecule having P-P-P bond angle 60º. Hence the molecule is under strain and more reactive. On the other hand red phosphorus exists as...