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NAT II Biological Science Chemistry MCQs With Answers
Question # 1
Among alkali metal salts, the lithium salts are the poorest conductors of electricity in aqueous solution because of
Choose an answer
Easy diffusion of Li
+
ions
Lower ability of Li
+
ions to polarize water molecules
Lowest charge to radius ratio
Higher degree of hydration of Li
+
ions
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Question # 2
The dimension of rate constant of second order reaction involves
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Neither time nor concentration
Only time
Time and concentration
Time and square of concentration
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Question # 3
The number of atoms contained in 11.2 L of SO
2
at S.T.P are
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3/2 x 6.02 x 10
23
2 x 6.02 x 10
23
6.02 x 10
23
4 x 6.02 x 10
23
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Question # 4
Galena is an ore of
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Gallium
Lead
Tin
Germanium
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Question # 5
Which of the following imparts violet colouration to non-luiminous flame of Bunsen burner?
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NaCl
2
BaCl
2
CaCl
2
KCl
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Question # 6
Natural fertilizer provides phosphorus to plants in the form of P
2
O
5
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1.2 kg
2.2 kg
3.2 kg
4 kg
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Question # 7
If the solvent is inflammable for heating purpose we use
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Ice bath
Water bath
Wire gauze
Thermostat
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Question # 8
A current of 9.65 ampere flowing ofr 10 minutes deposits 3.0 g of the metal which is monovalent. The atomic mass of the metal is
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10
50
30
96.5
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Question # 9
Bell metal is an alloy of
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Cu, Zn and Sn
Cu, Zn and Ni
Cu and Zn
Cu and Sn
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Question # 10
Which has largest radius?
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CO
3+
Mn
3+
Fe
3+
Cr
3+
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Question # 11
Phosphide ion has the electronic structure similar to that of
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Nitride ion
Fluoride ion
Sodium ion
Chloride ion
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