Solved Chemistry MCQS Set 1

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Solved Chemistry MCQS


If the solvent is inflammable for heating purpose we use
Ice bath
Water bath
Wire gauze
Thermostat

Which of the following imparts violet colouration to non-luiminous flame of Bunsen burner?
CaCl2
KCl
NaCl2
BaCl2

The valence orbital configuration of an element with atomic number 23 is
3d3, 4s2
3d2, 4s2, 4p1
3d3, 4s1, 4p1
3d5

2 g of oxygen contains number of atoms equal to that in
2.3 g of sodium
4 g of sulphur
0.5 g of hydrogen
7 g of nitrogen

Which of the following alkali metal hydroxides is the strongest base?
NaOH
LiOH
CsOH
KOH

Which has largest radius?
CO3+
Cr3+
Fe3+
Mn3+

Chile salt petre is
Na2S2O3
KNO3
Na2SO4
NaNO3

In cold countries ethylene glycol is added to water in radiators of cars during winter. It results in
Lowering in freezing pt.
Lowering in b.pt.
Reducing viscity
Reducing specific heat

Al is more reactive than Fe but Al is less easily corroded than Fe because
oxygen forms a protective reaction easily with water
Fe form mono and divalent ions.
Iron undergoes reaction easily with water
It is a noble metal

Which of the following possesses the highest melting point?
p-Dichlorobenzene
o- Dichlorobenzene
Chlorobenzene
m-Dichlorobenzene

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