Molecular compounds are usually formed by the combination between :
(a) a metal and a non-metal
(b) two different non-metals
(c) two different metals
(d) any two gaseous elements

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Solution

(b) two different non-metals
Molecular compounds are formed by the combination of two different non-metals.

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Give examples for the following:
(a) Ionic chlorides of two different divalent metals.
(b) Two solid covalent compounds.
(c) Two liquid non-polar compounds.
(d) Two gaseous polar compounds.
(e) Two gaseous non-polar compounds.

What type of compounds are usually formed between metals and non- metals?

Q. The formation of calcium oxide from its elements is a reaction between
(a) two metals.
(b) two non-metals.
(c) a metal and a non-metal.
(d) an alkali and an acid.

Name:

(a) two metals which are liquid at room temperature,

(b) metal which do not corrode easily

(d) a non-metal which is lustrous,

(e) a non-metal which conducts electricity,

(f) a metal which is brittle,

(g) two elements which are monoatomic,

(h) two metallic oxides which are acidic,

(i) two metallic oxides which are amphoteric,

(j) two metallic which react with cold water,

(k) the compound responsible for green deposit on the surface of copper,

(l) a non-metal which can form a positive ion,

(m) a non-metal which shows reducing property,

(n) a metal whose oxide is reduced only by carbon.

Q. Question 30
Non-metals are usually poor conductors of heat and electricity. They are non-lustrous; non-sonorous; non-malleable and are coloured.
(a) Name a lustrous non-metal.
(b) Name a non-metal which exists as a liquid at room temperature.
(c) The allotropic form of a non-metal is a good conductor of electricity. Name the allotrope.
(d) Name a non-metal which is known to form the largest number of compounds.
(e) Name a non-metal other than carbon which shows allotropy.
(f) Name a non-metal which is required for combustion.

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Molecular compounds are usually formed by the combination between : (a) a metal and a non-metal (b) two different non-metals (c) two different metals (d) any two gaseous elements

(b) two different non-metals Molecular compounds are formed by the combination of two different non-metals.

Molecular compounds are usually formed by the combination between :
(a) a metal and a non-metal
(b) two different non-metals
(c) two different metals
(d) any two gaseous elements

(b) two different non-metals
Molecular compounds are formed by the combination of two different non-metals.