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NAT I Engineering Chemistry MCQs With Answers
Question # 1
If the solvent is inflammable for heating purpose we use
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Ice bath
Water bath
Wire gauze
Thermostat
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Question # 2
Heating a mixture of sodium benzoate and soda lime gives
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Methane
Benzene
Sodium benzene
Calcium benzoate
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Question # 3
Which of the following mineral does not contain AI?
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Cryolite
Mica
Feldspar
Fluorspar
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Question # 4
Leblanc process is employed in the manufacture of
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Baking soda
Washing soda
Potash
Plaster of paris
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Question # 5
Hess's law deals with
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Changes in heat or reaction
Rate of reaction
Equilibrium constant
Influence of pressure on volume of a gas
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Question # 6
On heating acetaldehyde with ammonical silver nitrate solution we get
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CH
3
OH
Silver acetate
HCHO
Silver mirror
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Question # 7
In N.W.F.P the phosphate fertilizer are produced at
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D.I.Khan
Haripur
Nowshera
Dargai
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Question # 8
The equilibrium constant in a reversible chemical reaction at a given temperature
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Depends on the initial concentration of the reactants
Depends on the concentration of one of the products at equilibrium
Does not depend on the initial concentrations of recatants
Is not characteristic of the reaction
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Question # 9
AI is more reactive than Fe but AI is less easily corroded than Fe Because
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It is a noble metal
Oxygen forms a protective reaction easily with water
Iron undergoes reaction easily with water
Fe form mono and divalent ions.
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Question # 10
Which has largest first ionization energy?
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Li
Na
K
Rb
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Question # 11
Which one is the property of an ideal solvent
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Should be expensive
It should react chemically with the solute
Impurities should crystallize along with the solute
Should be safe to use
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