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Online Tests
Chemistry Fsc Part 1 Chapter 1 Online Test MCQs With Answers
Question # 1
Isotopes differ in
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Properties which depend upon mass
Arrangement of electrons in orbital
Chemical properties which depend upon weight
Atomic number
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Question # 2
Ascorbic acid is vitamin.
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A
B
C
D
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Question # 3
The largest number of molecule are present.
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3.6 g of H2O
4.6 g of C2H5OH
2.8 g of CO
5.4 g of N2O5
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Question # 4
Isotopes are the atoms of same element with similar chemical properties but different
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Atomic number
Atomic volume
Atomic weight
Atomic structure
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Question # 5
Many element have fractional atomic masses. This is because.
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the mass of the atom is itself fractional
Atomic masses are average mases of Isobars
Atomic masses are average masses Isotopes
Atomic masses are average masses of Isotopes proportional to their relative abundance.
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Question # 6
The element nickel has isotopes.
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3
2
5
7
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Question # 7
One mole of Carbon -12 has mass
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0.012 kg
1 kg
0.022 kg
12 kg
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Question # 8
One mole of ethanol and one mole of ethane have an equal
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Masses
Number of atoms
Number of electrons
Number of molecules
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Question # 9
What is the mass of aluminium is 204 g of the aluminum oxide Al2O3.
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26 g
27 g
54 g
108 g
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Question # 10
During combustion analysis, CO2 produced is absorbed in
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Mg (CLO4)2
50% KOH
CaCl2
P2O5
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Question # 11
The largest number of molecules are present in
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3.6 of H2O
4.6 g of C2H5OH
2.8 g of CO
5.4 g of N2O5
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Question # 12
CO+ is an example of.
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Free radical
Cationic molecular ion
Anionic molecular ion
Stable molecule
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Question # 13
The mass of one mole of electrons is.
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1.008 mg
0.55 mg
0.184 mg
1.673 mg
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Question # 14
One mole of CH
3
OH and one mole of C
2
H
5
OH have
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Equal number of atoms
Equal number of molecules
Equal number of electrons
Equal number of protons
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Question # 15
Tin has isotopes.
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9
10
11
12
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Question # 16
What has a mass equal to that of one mole of water.
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22.4 dm3 of water
One mole of steam
One molecule of water
Two moles of hydrogen molecules and one mole of oxygen molecules.
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Question # 17
the number of moles of CO2 which contain 8.0 g of oxygen.
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0.25
0.50
1.0
1.50
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Question # 18
The number of electrons in one mole of hydrogen gas is.
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6.02 x 10
23
12.04 x 10
23
Only two
Indefinite
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