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Chemistry General Science Test Medium Mode MCQs With Answers
Question # 1
An excess af silver nitrate is added to the aqueous barium chloride and the precipitate is removed by filtration. What are the main ions in the filtrate?
Choose an answer
Ag+ and NO3-, only
NO3- and Ba+2 only
Ag+ and NO-3, and Ba+2 only
CI- and NO-3, and Ba+2 only
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Question # 2
The fat soluble vitamins are:
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A and B
B and C
C and D
A and D
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Question # 3
Which is the optimum temperature for the activity of enzyme?
Choose an answer
20 - 35°C
10 -15°C
55 - 70°C
35 - 55°C
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Question # 4
The maximum possible number of hydrogen bonds in which a H
2
O molecule can participate is:
Choose an answer
1
2
3
4
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Question # 5
Which of the following is a macronutrient?
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Boron
Iron
Copper
Carbon
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Question # 6
The boiling point of H2O is 100°C while that of C2H5-OH is 78.5C°. The reason is that:
Choose an answer
H2O molecules are small-sized
the bond angles at oxygen atom are different
C2H5-group is electron donating
the number of H-bonds are greater in H20, than C2H5-OH
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Question # 7
The number of resonating structures of phenoxide ion are
Choose an answer
3
5
6
4
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Question # 8
When liquid solute is dissolved in liquid solvent, then the best unit of concentration is?
Choose an answer
% W/W
% W/V
% V/V
%V/W
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Question # 9
The pressure of gas at constant temperature in a container of 2dm3 is 10 atm what will be its final pressure if it is connected with 10 dm3 container
Choose an answer
2 atm
1.6 atm
5 atm
I atm
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Question # 10
Nihydrin reacts with amino acid to give product of
Choose an answer
Bluish color
Violet color
Bluish violet color
No color
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Question # 11
Elimination of molecular reactions usually obey:
Choose an answer
first order kinetics
second order kinetics
third order kinetic
zero order kinetic
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Question # 12
Which of the following is a method of converting a unsaturated ketone into unsaturated hydrocarbon?
Choose an answer
Aldol condensation
Reimer Tiemann reaction
Cannizaaor's reaction
Wolf-kishner reduction
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Question # 13
The statement that the properties of every eight elements are similar to the first is the law of
Choose an answer
Dobereiner
Newland
Mendeleev
L. Meyer
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Question # 14
In alkynes the bonds between carbon atoms are
Choose an answer
All sigma bonds
All pi(
π
) bonds
One is sigma and two are
π
(pi) bonds
One is
π
(pi) and two are sigma bonds
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Question # 15
Glacial acetic acid freezes to ice like solid at (
°
C)
Choose an answer
07
17
27
37
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Question # 16
Which of the following alkyl halides is used as a mathylating agent
Choose an answer
CH
2
H
5
l
CH
3
l
C
2
H
5
Pr
C
2
H
5
Cl
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Question # 17
Which compound shows hydrogen bonding
Choose an answer
C
2
H
6
C
2
H
5
CI
CH
3
- O - CH
3
C
2
H
5
OH
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Question # 18
Choose an answer
Step 1 Step 2
HCI HCN
HcN,NaCH H
2
SO
4
H
2
SO
4
K
2
Cr
2
O
7
/H
2
SO
4
KCN HCI
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Question # 19
The order of decreasing ease of reaction with ammonia is
Choose an answer
Anhydrides, esters, ethers
Anhydrides, ethers, esters
Ethers, anhydrides, esters
Esters, ethers, anhydrides
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Question # 20
Pakistan in the beginning was a country :
Choose an answer
Industrial
Chemical
Agrarian
Technologies
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Question # 21
Which is used to identify Cu
2+
ions
Choose an answer
Nitric acid
Sulfuric acid
NaOH
HCI
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Question # 22
A cell in which spontaneous redox reaction generates an electric current is called
Choose an answer
Electrolytic cell
Electrochemical cell
Voltaic or Galvanic cell
Biological cell
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