1)The nucleus of atom consist of of-
a) electrons and neutrons.
b) electrons and protons.
c) protons and neutrons.
d) All of the above.
Ans: c)
2) The number of moles of solute present in 1kg of a solvent is called its-
a) Molality
b) Molarity
c) Formality.
d) Normality.
Ans: a)
3) The most electronagative element among the following is-
a) Sodium
b) bromine
c) Fluorine
c) Oxygen.
Ans: c)
4) The Metal used to recover copper from a solution of copper sulphate is-
a) Na
b) Ag
c) Hg
d) Fe
Ans: d)
5) The metallurgical process in which a metal is obtained in a fused state is called-
a) Smelting
b) roasting
c) calcinations
d) Froth flotation.
Ans: a)
6) The heat required to raise the temperature of body by 1 Kg is called-
a) Specific heat
b) Thermal heat
c) Water equivalent
d) None of the above.
7) The nuclear particles which are assumed to hold the nucleons together are-
a) Electrons
b) Positrons
c) Neutrons
d) Neutrons
e) Mesons
Ans:e)
8) The octane number of zero is assigned to -
a) 2- methyl octane.
b) iso-octane
c) n- heptane.
d) 3- methyl octane.
Ans: c)
9) The metal that used as a catalyst in the hydrogenation of oils -
a) Ni
b) Pb
c) Cu
d) Pt
Ans: a)
10) The monomer of polythene is-
a) Vinyl Chloride
b) ethylene
c) ethyl alcohol
d) None of the above.
Ans: b)
11) The luster of a metal is due to-
a) Its high density
b) Its high polishing
c) Its chemical
d) Presence of free electrons
Ans: d)
12) The most malleable metal is-
a) Platinum
b) Silver
c) Iron
d) Gold
Ans: d)
13) The oil used in the froth flotation process is-
a) coconut oil
b) olive oil
c) kerosene oil
d) pine oil.
Ans: d)
14) The gas used in the manufacture of vanaspati from vegetable oil is-
a) hydrogen
b) oxygen
c) nitrogen
d) carbon dioxide
Ans: a)
15) The first metal used by man was-
a) Iron
b) copper
c) gold
d) bronze
Ans: b)
16) The most electropositive elements among the following is-
a) Na
b) Ca
c) K
d) Cs
Ans: d)
17) The law which states that the amount of gas dissolved in a liquid is proportional to its partial pressure is -
a) Dalton's law
b) gay Lussac's law
c) Henry law's
d) Robert Boyel Law
Ans: c)
18) The most commonly used bleaching agent is-
a) alcohal
b) carbon dioxide
c) Chlorine
d) sodium chlorine
Ans: c)
19) The most abundant rare gas in the atmosphere is-
a) He
b) Ne
c) Ar
d) Xe
Ans: c)
20) What are the number of mole of CO2 which contains 16 g of oxygen?
a) 0.5 mole
b) 0.2 mole
c) 0.4 mole
d) 0.25 mole
Ans: a)
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