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NAT I Engineering Chemistry MCQs With Answers
Question # 1
The maximum number of electrons in a subshell for which / = 3 is
Choose an answer
14
10
8
4
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Question # 2
Which of the following with aqueous KOH will give acetaldehyde?
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1,2-Dichloroethane
1, 1-Dichloroethane
Chloroacetic acid
Ethyl chloride
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Question # 3
The movement of solvent molecules through a semipermeable membrane is called
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Electrolysis
Electrophoresis
Osmosis
Cataphoresis
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Question # 4
Which of the following is a colligative property?
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Melting point
Osmotic pressure
Freezing point
Sublimation temperature
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Question # 5
The order of reactivity of halogens in aliphatic substitution reactions is
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Br2 > CI2 > F2
CI2 > Br2 > F2
CI2 CI2 > Br2
F2 > Br2 > CI2
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Question # 6
The essential component of organic compound is
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O
C
P
N
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Question # 7
Which of the following represents elements in order of increasing atomic size?
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I,Br,CI
Na,Mg,C
C,N,O
Li,Na,K
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Question # 8
In a reversible chemical reaction having two reactants in equilibrium if the concentration of the reactants are doubled then the equilibrium constant will
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Also be doubled
Be halved
Becomes one fourth
Remains the same
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Question # 9
In cold countries ethylene glycol is added to water in radiators of cars during winter It result in
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Lowering in b.pt.
Reducing viscosity
Reducing specific heat
Lowering in freezing pt.
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Question # 10
Which of the following belongs to the halogen family?
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Francium
Polonium
Radium
Astatine
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Question # 11
Which is the most volatile compound?
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HI
HCI
HBr
HF
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