1.
Which of the following helps in the rustig of iron
(a)
Fe (b) O2 (c) Zn
(d) H+
Ans.
(d) H+
2.
The long form of the periodic table is based on the properties of elements as a
function of
(a)
atomic size (b)electro negativity (c) atomic number (d)
atomic mass
Ans.
(c) atomic number
3.
The element with maximum electronegative character in the periodic table is
(a)
oxygen (b) nitrogen (c) fluorine (d) chlorine
Ans.
(c) fluorine
4. Mendeleev’s periodic table is based on
(a)
atomic weight (b) atomic number (c) number of neutrons (d) none of these
Ans.
(a) atomic weight
5.
Which of the following statements about the physical properties of the metals
is not correct?
(a)
All metals are solid except mercury (b)
Most of the metals are hard except sodium and potassium
(c)
they are not malleable (d) Most of
the metals are ductile
Ans.
(c) they are not malleable
6.
From which of the following sources can you get the purest form of water
(a)
Mineral water (b) Rain water (c) River water (d) Well water
(b)
Rain water
7.
Iodine is administered to patients suffering from
(a)
Goitre (b) Nightblindness (c) Rickets (d) Rheumatism
Ans.
(a) Goitre
8.
Of all the gases present in the air which one of the following is highest in
percentage
(a)
Carbon dioxide (b) Hydrochloric (c) Nitrogen
(d) Oxygen
Ans.
(c) Nitrogen
9.
The combustible material on the tip of safety match-sticks is
(a)
Antimony sulphide (b) phosphorus (c)
Manganese dioxide (d) sulphur
Ans.
(a) Antimony sulphide
10.
The term ‘carat’ is used to express the purity of gold the purest form of gold
is of
(a)
18 carats (b) 20 carats (c) 22 carats (d) 24 carats
Ans. (d) 24 carats
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