Engineering Chemistry NEET MCQs with Answers
Multiple Choice Question Answer:Â c The ratio of the rate constant of a reaction at two temperatures differing by how much 0C is called the temperature coefficient of the reaction?
(A). Â 2
(B). Â 100
(C). 20
(D). Â 10
(E). None of these
Multiple Choice Question Answer:Â d
Which of the following is the Natural rubber?
(A). Â Acrylonitrile
(B). Â Ethylene glycol
(C). Â Butadiene
(D). Â Polyisoprene
(E). None of these
Multiple Choice Question Answer: Â d
Not the essential structural requirement of an elastomer is ______________
(A). Â Rigidity in structure
(B). Â Weak intermolecular forces
(C). Long flexible chains
(D). Â Occasional cross-linking
(E). None of these
Multiple Choice Question Answer: Â a
The method that is satisfactory just for a simple homogeneous reaction is _______________
(A). Â Graphical method
(B). Integration method
(C). Â Half-life period method
(D).  Ostwald’s isolation method
(E). None of these
Multiple Choice Question Answer: Â b
The amount of sulphur that is added always determines the extent of the stiffness of vulcanised rubber.
(A). Â False
(B). Â True
(E). None of these
Multiple Choice Question Answer: Â b
At which of the following temperature the raw rubber is heated for the vulcanisation process?
(A). Â 0-10 0C
(B). Â 10-50 0C
(C). Â 100-140 0C
(D). Â 50-100 0C
(E). None of these
Multiple Choice Question Answer: Â c
Which of the following is the incorrect statement?
(A). Â Raw rubber is durable
(B). Â Raw rubber is attacked by oxidizing agent
(C). Â In the organic solvents, it always undergoes the swelling and
the disintegration
(D). Â The Raw rubber is always weak and have very low tensile strength
(E). None of these
Multiple Choice Question Answer: Â a
What is A zero-order reaction?
(A). Â the one Whose rate increases with time
(B). Â the one In which one of the reactants is in large excess
(C) the one In which the rate is independent of the reactants concentration
(D). ). Â the one Whose rate is not affected by time
(E). None of these
Multiple Choice Question Answer: Â c
Which of the following is the tensile strength(kg/cm 2) of vulcanised rubber?
(A). Â 200
(B). Â 5000
(C). Â 500
(D). Â 2000
(E). None of these
Multiple Choice Question Answer: Â d
Which of the following is the percentage of butadiene and styrene in Buna-S?
(A). Â 75% and 25% respectively
(B). Â 60% and 40% respectively
(C). Â 80% and 20% respectively
(D). Â 50% each
(E). None of these
Multiple Choice Question Answer: Â a
Which of the following is the structural formula of isoprene?
(A). Â 2-benzyl-1,3-butadiene
(B). Â 3-benzyl-1,2-butadiene
(C). Â 2-methyl-1,3-butadiene
(D). Â 3-methyl-1,2-butadiene
(E). None of these
Multiple Choice Question Answer: Â c
What happens to the half life period of a first order reaction vary with temperature?
(A). Â It remains the same
(B). Â Â It increases
(C). Â It decreases
(D). Â Both increases as well as decrease
(E). None of these
Multiple Choice Question Answer:Â a
The Temperature dependence of reaction rates can be studied by plotting a graph between which of the following?
(A). Â Concentration of products and temperature
(B). Â Rate constant and temperature
(C). Â Concentration of reactants and temperature
(D). Â Rate of catalysis and temperature
(E). None of these
Multiple Choice Question Answer: Â b
According to Arrhenius equation, rate constant(k) is proportional to which of the following?
(A). Â Activation Energy (E)
(B). Â e1/E
(C). Â e-E
(D). Â eE
(E). None of these
Multiple Choice Question Answer: Â b
At 200C for a reaction having the activation energies in the presence and absence of catalyst as 50 kJ/mol and 75 kJ/mol, the rate of reaction increases ______________ times
(A). Â 10000
(B). Â 30000
(C). Â 1000
(D). Â 50000
(E). No ne of these
Multiple Choice Question Answer: Â b
The method that is used for determining the order of the reaction in which two or more reactants take part is _____________
(A).  Ostwald’s isolation method
(B). Â Integration method
(C). Â Graphical method
(D). Â Half life period method
(E). None of these
Multiple Choice Question Answer: Â a
In the vulcanisation process, with wich of the following the raw rubber is heated?
(A). Â Oxygen
(B). Â Calcium
(C). Â Carbon
(D). Â Sulphur
(E). None of these
Multiple Choice Question Answer: Â d
The incorrect statement is that the Vulcanised rubber has ______________
(A). Â high elasticity
(B). Â only slight tackiness
(C). Â excellent resilience
(D). Â tensile strength 10 times more than raw rubber
(E). None of these
Multiple Choice Question Answer: Â a
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