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Online Tests
Chemistry Fsc Part 1 Online Test MCQs With Answers
Question # 1
How many molecules of CO2 are formed by burning 12 g carbon with excess of oxygen.
Choose an answer
3.01 x 10
23
1 x 10
23
6.02 x 10
23
1.03x 10
23
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Question # 2
18 g of glucose is dissolved in 90 g of water. The relative lowering of vapour pressure is equal to
Choose an answer
1/5
5.1
1/51
6
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Question # 3
When a reaction proceeds in a sequence of steps, the overall rate is determined by
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Fastest step
Slowest step
Order of different steps
Molecularity of all steps
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Question # 4
Borax has the chemical formula.
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KNO3
Na2B3O7.10H2O
Na2CO3
NaNO3
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Question # 5
18 g glucose is dissolved in 90 g o water, The relative lowering of vapour pressure is equal to.
Choose an answer
1/5
5.1
1/51
6
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Question # 6
When an ionic compound is dissolved in water, it dissociate into positive and negative ions, which are surrounded byH2O molecule, This process is known as.
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Hydrolysis
Hydration
Saturation
solvolysis
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Question # 7
Cathode rays strike alumina and produce a ..........colour.
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Red
Blue
Yellow
Green
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Question # 8
As the quantum number n increases, the energy difference between adjacent energy level.
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Increase
Remain same
Decrease
No correlation
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Question # 9
Long chains of amino acids are coiled about one another into a spiral by
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Covalent bond
Ionic bond
Hydrogen bond
Van Der Waal's forces
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Question # 10
When an atom reacts chemically and loses one or more electrons it is.
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Decomposed
Reduced
Oxidized
Catalyzed
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Question # 11
BF3 has zero while NH3 has 1.49 D dipole moment because.
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B is less electronegative than N
F is more electronegative than N
BF3 is pyramidal while NH3 is planar
NH3 is pyramidal while BF3 is trigonal planar
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Question # 12
Which acid has less value of pKa.
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CH3COOH
H2S
H2CO3
HCl
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Question # 13
Stronger the oxidizing agent greater is the
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Oxidation potential
Reduction potential
Redox potential
E.M.F of cell
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Question # 14
Partial pressure of oxygen in the air is.
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156 torr
157 torr
158 torr
159 torr
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Question # 15
Along period of periodic table shielding effects.
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Increases
Decreases
Remain constant
First increases than decreases
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Question # 16
In a group of periodic table, ionization energy.
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Decreases
Increases
Remains same
First increases than increases
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Question # 17
With increase in 10°C temperature, the rate of reaction double. This increase in rate of reaction is due to
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Decrease in activation energy of reaction
Decrease in the number of collisions between reactant molecules
Increases in activation energy of reactants
Increase in number of effect collisions
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Question # 18
Le-Chatelier Braun principle is sometimes known as
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Law of mass action
Law of mobile equilibrium
Law of active mass
All of these above
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