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Chemistry General Science Test Hard Mode MCQs With Answers
Question # 1
According to MO Theory the species O
+
2
possesses
Choose an answer
Bond order of 2.5
Three unpaired electrons
Diamagnetic character
Stability lower then O
2
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Question # 2
With increasing principle quantum number the energy difference between adjacent energy levels in H atom
Choose an answer
Decreases
Increases
Remains constant
Decreases for low value of Z and increases for higher value of Z.
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Question # 3
The number of atoms contained in 11.2 L of SO
2
at S.T.P are
Choose an answer
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
Hybridization explain the------- of orbitals
Choose an answer
Type of Bonding
Shapes
Shape and Type of bonding
None of above
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Question # 5
The rate at which a substance reacts depends on its
Choose an answer
Atomic weight
Equivalent weight
Molecular weight
Active mass
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Question # 6
Toluene can be oxidized to benzonic acid by
Choose an answer
KMnO4 (alk)
K
2
Cr
2
O
7
(acidic)
Both
None
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Question # 7
The credit of discovering neutron goes to
Choose an answer
Rutherford
Langmuir
Chadwick
Austen
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Question # 8
Formic acid is obtained when
Choose an answer
Calcium acetate is heated with conc.H
2
SO
4
Calcium formate is heated with calcium acetate
Glycerol is heated with oxalic acid
Acetaldehyde is oxidized with K
2
CrO
7
and H
2
SO
4
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Question # 9
The substance used as a smoke screen in warfare is
Choose an answer
SiCI
4
PH
3
PCI
5
Acetylene
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Question # 10
Mark the smallest atom
Choose an answer
F
CI
Br
I
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Question # 11
At room temperature formaldehyde is
Choose an answer
Gas
Liquid
Solid
None of the above
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Question # 12
Calcium acetate when dry distilled
Choose an answer
Formaldehyde
Acetaldehyde
Acetone
Acetic anhydride
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Question # 13
What happens when CCl
4
is treated with AgNO
3
solution?
Choose an answer
NO
2
will be evolved
A white ppt. of AgCl will form
CCl
4
will dissolve in AgNO
3
solution
Nothing will happen
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Question # 14
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
Choose an answer
10
50
30
96.5
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Question # 15
Enzymes are
Choose an answer
Proteins
Minerals
Oils
Fatty acids
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Question # 16
Oleum is
Choose an answer
Castor oil
Oil of vitriol
Fuming of H
2
SO
4
None of them
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Question # 17
Bleaching action of bleaching powder is due to the liberation of
Choose an answer
O
2
OCl
-
Cl
2
Cl
-
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Question # 18
In the manufacture of iron from haematite, limestone is added to act as.
Choose an answer
Flux
A reducing agent
Slag
An oxidizing agent
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Question # 19
The density of nitrogen gas prepared from air is slightly greater than that of nitrogen prepare by a chemical reaction form a compound of nitrogen due to the presence of the following in aerial nitrogen.
Choose an answer
Argon
CO
2
Some nitrogen molecules analogous to O2
Greater amount of nitrogen molecules derived from N
15
isotope.
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Question # 20
Sulphonation of benzoic acid produces mainly
Choose an answer
o-Sulphobenzoic acid
m-Sulphobenzoic acid
p-Sulphobenzoic acid
o- and p-Sulphobenzoic acid
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Question # 21
Dolomite has the composition
Choose an answer
KCL.MgCL
2
.6H
2
O
Na
3
AIF
6
CaCO
3
.MgCO
3
CaCL
2
.MgCl
2.
6H
2
O
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Question # 22
What happens when isotonic solution of a (mol. wt. 342) and B (mol. wt 60) are put in to communication through semiperme-able membrane?
Choose an answer
Transference of solvent from solution A to that of B take place
Transference of solvent from solution B to that of A takes place
No transference of solvent from solution A to that of B takes place
Change in temperature of solutions takes place.
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