chemical engineering MCQs – Page 261

Practise multiple-choice questions from chemical engineering for competitive examinations and subject revision. Review each marked answer and report any item that may be outdated or unclear.

chemical engineering Mcqs

5201. The mass number of an element is not changed, when it emits _______________ radiations?
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A. ? & ?

B. ? & ?

C. ?, ?, & ?

D. ? & ?

5202. Cross linked polymers formed from bi-and trifunctional groups in which cross-linkage in three dimensions via few chemical bonding across linear chains occur imparts to the polymer ______________ properties?
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A. Elastometric

B. Thermoplastic

C. Brittleness

D. Thermosetting

5203. The synthetic fibres produced from _____________ are known as rayon?
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A. Cellulose

B. Polyamides

C. Ethylene glycol

D. Lignin

5204. Pick out the wrong statement?
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A. Most of the enzyme catalysed reactions involve at least two substrates

B. Catalytic activity of enzyme catalysed reactions which is affected by temperature, pH value &

C. rmodynamic properties of substrates & products

D. mical agents, is maximum at a temperature of about 45C

E. Enzymes help in increasing the activation energy of the reaction

F. Equilibrium concentrations in enzyme catalysed reactions can be calculated by using the

5205. Pick out the wrong statement?
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A. Naphthenic oil has very low viscosity index

B. High viscosity index means a large change in viscosity with change in temperature

C. Paraffinic oil has very high viscosity index

D. Multigrade lubricating oils have high viscosity index

5206. The decay product of tritium (a beta emitter) is_________________?
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A. Deuterium

B. Lithium

C. Helium

D. Hydrogen

5207. Coolant used in a boiling water reactor is________________?
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A. A mixture of water & steam

B. Hydrogen gas

C. Water

D. Steam

5208. A pressurised water reactor (PWR) uses pressurised water as a___________________?
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A. Coolant

B. Working fluid in power turbine

C. Moderator

D. None of these

5209. The rate controlling step in the manufacture of silicone rubber is the_________________?
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A. Initial hydrolysis of silicone monomer

B. Polymer termination step

C. None of these

D. Condensation of siloxane to silicone

5210. Pick out the correct statement ?
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A. The difference between the energy of reactants and that of the products is the activation

B. A catalyst changes the equilibrium point

C. Law of mass action was suggested by Le-Chatelier

D. rgy

E. A catalyst does not change AH of the reaction

5211. Which one is the radioactive isotope of hydrogen ?
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A. Ortho-hydrogen

B. Deuterium

C. None of these

D. Tritium

5212. Reaction of dimethyl terephthalate (DMT) and ethylene glycol produces________________?
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A. Nylon-6

B. PVC

C. Polyester

D. Dacron

5213. Commercial power generation from fusion reactor is not yet possible, because___________________?
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A. The fuel required (i.e., deuterium & tritium) is scarce

B. It is difficult to initiate fusion reaction

C. It is difficult to control nuclear fusion reaction

D. Quantity of fuel required for initiating fusion reaction is prohibitively high

5214. Pick out the wrong statement?
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A. A very high value of equilibrium constant, K (K >> 1) indicates that the reaction is practically

B. ions

C. A particular chemical reaction is more temperature sensitive at low temperatures

D. The intercept of the Arrhenius plot is called the activation energy

E. eversible in nature

F. Non-ideal flow takes place in reactors due to recycling, channeling or by creation of stagnant

5215. The conversion of caprolactam in the above case is about ____________ percent?
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A. 70

B. 50

C. 25

D. 90

5216. Pick out the wrong statement?
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A. Heat capacity of a diatomic gas is higher than that of a monatomic gas

B. Equal volumes of Argon and Krypton contain equal number of atoms

C. Total number of molecules contained in 22.4 litres of hydrogen at NTP is 6.023 x 1023

D. The binary mixture of a particular composition in both vapor and liquid state is known as an azeotropic mixture

5217. H2 is a better coolant than CO2, due to it?s relatively____________________?
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A. Non-reactivity to uranium

B. Higher specific heat

C. Lower density

D. Lower neutron capture cross-section

5218. Thermosetting polymers as compared to thermoplastic polymers_____________________?
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A. None of these

B. Have linear structure

C. Are formed by addition polymerisation

D. Have three dimensional structure

5219. Polyvinyl alcohol is used as a___________________?
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A. Non-sticky coating on frying pans

B. Cation/anion exchanger

C. Water soluble adhesive

D. Textile fibre

5220. Maximum consumption of polymers is in___________________?
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A. Electrical insulation

B. Toys making

C. Packaging

D. Coating and films

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