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Chemistry Fsc Part 1 Online Test MCQs With Answers
Question # 1
The smallest collection of ions in an ionic compound is called.
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Formula unit
Chemical formula
Formula mass
Molecular formula
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Question # 2
Which one of the following molecule have angle of 120
o
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Be Cl2
BF3
CH4
NH3
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Question # 3
Ionic solids are characterized by.
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Low melting points
High vapour pressures
Good conductivity in solid state
Solubility in polar solvents
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Question # 4
Chromatography in which the stationary phase is a solid is classified as.
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Partition chromatography
Gas chromatography
Adsorption Chromatography
Thin layer chromatography
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Question # 5
Upper consulate temperature for water phenol system is.
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150
o
C
65.9
o
C
120
o
C
130
o
C
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Question # 6
When 6d orbital is complete, the entering electron goes into.
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7f
7s
7p
7d
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Question # 7
10 g of NaOH have been dissolved per kg of solvent The molality of solution.
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0.25 m
0.5 m
1.0 m
2.0 m
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Question # 8
Which one of the following is not property of a good solvent.
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It should be inexpensive
It should dissolve impurities easily
It should dissolve large amount of solute at boiling point and less amount of solute at low temperature.
It should not react chemically with solute
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Question # 9
Rutherford's model of atom failed because.
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The atom did not have a nucleus and electron
It did not account for the attraction between protons and neutrons.
It did not account for stability of the atom
There is actually no space between the nucleus and the electrons.
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Question # 10
n+1 value of 6d orbital is.
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08
09
10
18
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Question # 11
Lyman series lie in
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Ultraviolet region
Visible region
Infrared region
Radio waves region
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Question # 12
Sum of pKa and pKb is equal to.
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1
7
0
14
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Question # 13
Azeotrpic mixture of two liquids boils at a lower temperature than either of them, when
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It is saturated
Is shows positive deviation from Raoult's law
It shows negative deviation from Raoult's law
Is is metastable
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Question # 14
In methanol, bond between carbon and oxygen.
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Ionic
Non polar
Polar
Co - ordinate
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Question # 15
Which of the hydrogen halides has the highest percentage of ionic character
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HF
HBr
HCI
HI
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Question # 16
Which of the following is a polar molecule
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CCl4
HCl
BF3
CO2
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Question # 17
Oxidation number of carbon in NaHCO
3
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+4
-6
+6
+2
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Question # 18
The unit of Kc for the reaction N2 +O2 = 2NO will be
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mol dm-3
mol-1 dm+3
mol-2 dm+6
No units
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