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Online Tests
Chemistry Fsc Part 1 Online Test MCQs With Answers
Question # 1
Oxidation number of Cr in a C
2
CrO
4
is
Choose an answer
+2
+4
+6
+8
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Question # 2
Chromatographic technique is very useful for
Choose an answer
Isolation
Purification
separation
All of them
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Question # 3
The pK
a
value of CH
3
COOH is 4.74 when we mix CH
3
COOH and CH
3
COONa in the ratio of 10:1, tehn the pH of the buffer is
Choose an answer
4.74
5.74
3.74
7.00
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Question # 4
If salt bridge is not used between two half cells, than the voltage.
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Decreases rapidly
Decreases slowly
Does not change
Drops of zero
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Question # 5
The rate of reaction
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Increases
Decreases
Remains the same
May decrease of increase
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Question # 6
The unit of rate constant depends upon
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Number of reactants
Concentration terms
Order of reaction
Molecularity of reaction
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Question # 7
How many atoms are present in half mol of oxygen gas. Gas exist in diatomic state.
Choose an answer
3.01 x 10
23
6.02 x 10
23
2 x 10
23
1.003 x 10
23
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Question # 8
The molal boiling point constant is the ratio of elevation of boiling point to
Choose an answer
Molarity
Mole fraction of solvent
Molality
Mole fraction of solute
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Question # 9
Colligative properites are the properties of
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Dilute solutions which behave as nearly ideal solution
Concentrated solution which behave as nearly non-ideal solution
Both a and b
Neither a nor b
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Question # 10
Tin has isotopes.
Choose an answer
9
10
11
12
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Question # 11
Kw for water at 0 oc is 0.1 x 10
-34
and at 100
o
C 7.5 x 10
-14
, How many times dissociation of water increase from 0
o
Cto 100
o
C
Choose an answer
7.5 times
50 times
75 times
100 times
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Question # 12
If the number of gas molecules are doubled in a certain volume of a gas, the pressure is.
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Decreased to half
Doubled
Increased to four time
Remains unchanged
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Question # 13
The number of moles of hydrogen atoms in 3.2 g of methane CH4.
Choose an answer
0.2
0.4
0.6
0.8
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Question # 14
Which mixture of gases is used by the deep sea divers.
Choose an answer
Oxygen and nitrogen
Oxygen and helium
Oxygen and carbon di oxide
Oxygen and water vapours
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Question # 15
Which of the following precautions in necessary for smooth filtration
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The filter paper should be of big size
The tip of funnel should not touch the side of the beaker
The stem of the funnel should be very small
The stem of he funnel should remain continuously full of liquid
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Question # 16
Which acid has less value of pKa.
Choose an answer
CH3COOH
H2S
H2CO3
HCl
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Question # 17
Which of the following has highest percentage ionic character.
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HCl
HF
HBr
HI
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