1.
Cooking gas supplied in cylinders by gas agencies is
(a)
Liquid (b) gaseous (c) solid
(d) a solution
Ans.
(a) liquid
2.
Cooking gas contains more than 90 % of this gas
(a)
Hydrogen (b) sulphur dioxide (c) helium (d) methane
Ans.
(d) methane
3.
The substance that can conduct electricity in its molten state is
(a)
Sugar (b) glucose (c) common salt (d) urea
Ans.
(c) common salt
4.
For the production of iron, the raw materials used is
(a)
Limestone (b) coke (c) petrol (d)
rubber
Ans. (b) coke
5.
Of the following gases, which one is used in the multicolored display signs
seen at nights
(a)
Xenon (b) neon (c) argon
(d) krypton
Ans.
(b) neon
6.
The natural substance from which energy can be harnessed, which is essentially
made up of only one element, is
(a)
Petroleum (b) coal (c)
water (in dams) (d) air (in wind mills)
Ans.
(b) coal
7.
Most ionic compounds have
(a)
High melting points and non-directional bonds
(b)
High solubility in polar solvents and low solubility
(c)
Three-dimensional network structures and are good
conductors of electricity in the molten
state
(d)
All of above
Ans.
(d) all of above
8.
An ionic solid is a poor conductor of electricity because
(a)
Ions do not conduct electricity
(b)
The charge on the ions is uniformly distributed
(c)
Ions occupy fixed positions in solids
(d)Ions
have uniform fields of influence
Ans.
(c) Ions occupy fixed positions in solids
9.
A covalent bond is formed between two atoms when
(a)
One or more pair of electrons are shared by the two atoms
(b)
The two atoms are of the same size
(c)
The electro negativities of the two atoms differ considerably
(d)The
electron affinities of the two atoms are the same
Ans.
(a) One or more pair of electrons are shared by the two atoms
10.
A saturated solutions at a particular temperature
(a)
Is colourless
(b)
Is highly coloured
(c)
Does not dissolve any more of the solid solute
(d)
Contains suspended solid particles
Ans.
(c) Does not dissolve any more of the solid solute
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