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Online Tests
Chemistry Fsc Part 1 Online Test MCQs With Answers
Question # 1
Acetone and chloroform are soluble in each other due to
Choose an answer
Intermolecualr hydrogen bonding
Dipole-dipole interaction
Instantaneous dipoles
All of the above
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Question # 2
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 # 3
NH
3
shows a maximum boiling point among the hydrides of V-A group elements due to
Choose an answer
Very small size of nitrogen
Lone pair electrons present on Nitrogen
Enhanced electronegative character of Nitrogen
Pyramidla structure of NH
3
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Question # 4
The change in heat energy of a chemical reaction at constant temperature and pressure is called.
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Enthalpy change
Bond energy
Heat of sublimation
Internal energy change
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Question # 5
If the energy of the activated complex lies close to energy of reactants, it means that reaction is
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Slow
Fast
Exothermic
Endothermic
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Question # 6
A limiting reactant is one.
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Which is present in least amount
Which produces minimum number of moles of product
Which produces maximum number of moles product
Does not effect the amount of product.
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Question # 7
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 # 8
The boiling point of pure water at 1 atm pressure is.
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98
o
C
100
o
C
69
o
C
120
o
C
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Question # 9
Which statement is incorrect about activated complex
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Short lived
Maximum energy
Unstable combination of atoms
Less energy than Ea
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Question # 10
Cell potential depends upon
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Temperature
Concentration of ions
Nature of electrolyte
All of above
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Question # 11
In zero order reaction, the rate is independent of
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Temperature of reaction
Concentration of reactants
Concentration of products
None of these
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Question # 12
How many moles of water results by burning 4 mole of H2 with excess of oxygen.
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1 mol
2 mol
3 mol
4 mol
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Question # 13
The number of moles of acid or base required by one dm
3
of buffer to alter its pH by one unit is called
Choose an answer
Buffer efficiency
Buffer capacity
Buffer action
None
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Question # 14
The diffusion of gases at absolute zero will be
Choose an answer
Unchanged
Zero
slightly decreases
Slightly increases
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Question # 15
If the salt bridge is not used between two half cells, then the voltage.
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Decrease rapidly
Decrease slowly
Drops to zero
Does not change
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Question # 16
18 g 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 # 17
Energy and wavelength of a photon are related as.
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Direct
In direct
No correlation
Inverse under root
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Question # 18
The unit of rate constant is same as that of rate of reaction in
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first order reaction
Second order reaction
Third order reaction
Zero order reaction
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