Chemical Process Mcqs - Set 4

1)   Bitterns is a/an_________________?

a. Unsaturated fat
b. Starting material for the production of iodine
c. By-product of chlor-alkali industry
d. None of these
Answer  Explanation 

ANSWER: None of these

Explanation:
No explanation is available for this question!


2)   Permanent hardness of water can be removed by____________________?

a. Simply boiling
b. Adding alum
c. Passing it through cation & anion exchangers
d. All (A), B. and (C)
Answer  Explanation 

ANSWER: Passing it through cation & anion exchangers

Explanation:
No explanation is available for this question!


3)   The yield of tar from high temperature carbonisation of dry coal is about _______________ percent?

a. 3
b. 12
c. 22
d. 0.3
Answer  Explanation 

ANSWER: 3

Explanation:
No explanation is available for this question!


4)   Main product in calcium carbide-water reaction is___________________?

a. Ca(OH)2
b. C2H2
c. CO2
d. CaCO3
Answer  Explanation 

ANSWER: C2H2

Explanation:
No explanation is available for this question!


5)   The main aim behind cooling the digested chip at the bottom portion of the digestor by injecting cold black liquor is to___________________?

a. Avoid mechanical weakening of fibre
b. Remove lignin by way of crystallisation
c. Increase the cellulose content
d. None of these
Answer  Explanation 

ANSWER: Avoid mechanical weakening of fibre

Explanation:
No explanation is available for this question!


6)   Thermoplastic materials_____________________?

a. Do not soften on application of heat
b. Are heavily branched molecules
c. Are solvent insoluble
d. None of these
Answer  Explanation 

ANSWER: None of these

Explanation:
No explanation is available for this question!


7)   Flexible foam (for mattresses) is usually made of_____________________?

a. PVC
b. Silicone
c. Polyurethanes
d. Polyamides
Answer  Explanation 

ANSWER: Polyurethanes

Explanation:
No explanation is available for this question!


8)   Which of the following is an additional step in the manufacture of paper from bagasse as compared to that from bamboo ?

a. Depithing
b. Digestion
c. Bleaching
d. None of these
Answer  Explanation 

ANSWER: Depithing

Explanation:
No explanation is available for this question!


9)   The most widely used coagulant for removing suspended impurities from water is__________________?

a. Bleaching powder
b. Chlorine
c. Calcium sulphate
d. Alum
Answer  Explanation 

ANSWER: Alum

Explanation:
No explanation is available for this question!


10)   Iron ore hematite is concentrated using ____________________?

a. Electromagnetic separation mainly
b. Gravity separation
c. Froth floatation
d. Roasting
Answer  Explanation 

ANSWER: Gravity separation

Explanation:
No explanation is available for this question!


11)   Which of the following is an unsaturated fatty acid ?

a. Lauric acid
b. Palmitic acid
c. Stearic acid
d. Oleic acid
Answer  Explanation 

ANSWER: Oleic acid

Explanation:
No explanation is available for this question!


12)   Percentage of glycerine present in the spent lye obtained during soap manufacture is about________________?

a. 0.5
b. 5
c. 20
d. 35
Answer  Explanation 

ANSWER: 5

Explanation:
No explanation is available for this question!


13)   High purity nitrogen is used in__________________?

a. Making protective gas (95% N2 + 5% H2) for annealing of cold rolled steel strip coils
b. Fire fighting purposes
c. Both A. & B.
d. Neither A. nor (B)
Answer  Explanation 

ANSWER: Both A. & B.

Explanation:
No explanation is available for this question!


14)   The main use of HCl is in the___________________?

a. Drilling of petroleum wells and pickling of steel sheets
b. Manufacture of cationic detergent
c. Treatment of spent fuel of nuclear reactor
d. None of these
Answer  Explanation 

ANSWER: Drilling of petroleum wells and pickling of steel sheets

Explanation:
No explanation is available for this question!


15)   Sand and ______________ is fused at 1300°C, to produce sodium silicate ?

a. Limestone
b. Soda ash
c. Coke
d. Sodium sulphate
Answer  Explanation 

ANSWER: Soda ash

Explanation:
No explanation is available for this question!


16)   The chamber process is______________________?

a. Preferred over contact process for producing 98 to 100% H2SO4 and various oleums
b. Non-catalytic and operates only on pyrites
c. A batch process for directly producing high strength (98 to 100%) H2SO4
d. None of these
Answer  Explanation 

ANSWER: None of these

Explanation:
No explanation is available for this question!


17)   Hydrophilic group of a soap or detergent solution is____________________?

a. Water hating
b. Soil loving
c. Water loving
d. None of these
Answer  Explanation 

ANSWER: Water loving

Explanation:
No explanation is available for this question!


18)   Oxygen is separated by distillation from air after its liquefaction. The boiling point of oxygen is about ______________ °C ?

a. -83
b. -183
c. -196
d. -218
Answer  Explanation 

ANSWER: -183

Explanation:
No explanation is available for this question!


19)   Haemoglobin is a/an____________________?

a. Amino acid
b. Biological catalyst
c. Protein
d. Enzyme
Answer  Explanation 

ANSWER: Protein

Explanation:
No explanation is available for this question!


20)   Esterification reaction produces _________________?

a. Detergent
b. Vanaspati
c. Soap
d. Mercaptans
Answer  Explanation 

ANSWER: Soap

Explanation:
No explanation is available for this question!


21)   Chlorine gas is produced by the electrolysis of brine (NaCl solution with solid NaCl make up) in mercury electrolytic cell. Which of the following is the anodic reaction ?

a. Oxidation of Na+ ions
b. Oxidation of Cl- ions
c. Reduction of Na+ ions
d. Reduction of Cl- ions
Answer  Explanation 

ANSWER: Oxidation of Cl- ions

Explanation:
No explanation is available for this question!


22)   Sulphur addition in soap is done to _____________________?

a. Improve the soap texture
b. Cure pimples & dandruff
c. Fasten lather formation
d. Increase its cleansing action
Answer  Explanation 

ANSWER: Cure pimples & dandruff

Explanation:
No explanation is available for this question!


23)   Glass is__________________?

a. Mainly CaO
b. Subjected to galvanising
c. A super cooled liquid
d. All A , B. and C.
Answer  Explanation 

ANSWER: A super cooled liquid

Explanation:
No explanation is available for this question!


24)   In sulphate pulp manufacture, the pressure and temperature in the digestor is____________________?

a. 10 atm., 800 °C
b. 10 atm., 170-180°C
c. 1 atm., 170 – 180°C
d. 1 atm., 800°C
Answer  Explanation 

ANSWER: 10 atm., 170-180°C

Explanation:
No explanation is available for this question!


25)   The basic constituent of vegetable oils is ___________________?

a. Triglyceride
b. Fatty acids
c. Fatty alcohol
d. Mono esters
Answer  Explanation 

ANSWER: Triglyceride

Explanation:
No explanation is available for this question!


26)   Fusion of bauxite and ________________ produces high alumina cement?

a. Alum
b. Limestone
c. Coke
d. Quartz
Answer  Explanation 

ANSWER: Limestone

Explanation:
No explanation is available for this question!


27)   ____________ are used as corrosion inhibitor for iron & steel in aqueous solutions ?

a. Phosphates
b. Chromates
c. Sulphates
d. Bi-carbonates
Answer  Explanation 

ANSWER: Chromates

Explanation:
No explanation is available for this question!


28)   Which is the main reducing agent during production of iron from iron ore in a blast furnace ?

a. C
b. CO
c. CO2
d. H2
Answer  Explanation 

ANSWER: CO

Explanation:
No explanation is available for this question!


29)   Which of the following is not responsible for causing permanent hardness of water ?

a. Ca(HCO3)2
b. CaCl2
c. MgCl2
d. None of these
Answer  Explanation 

ANSWER: Ca(HCO3)2

Explanation:
No explanation is available for this question!


30)   Which of the following contains least amount of N2 ?

a. Coke oven gas
b. Blast furnace gas
c. Producer gas
d. Water gas (blue gas)
Answer  Explanation 

ANSWER: Coke oven gas

Explanation:
No explanation is available for this question!


31)   Oxidation of SO2 to SO3 is favoured by______________________?

a. Low temperature and low pressure
b. Low temperature and high pressure
c. High temperature and low pressure
d. High temperature and high pressure
Answer  Explanation 

ANSWER: Low temperature and high pressure

Explanation:
No explanation is available for this question!


32)   Exothermic condensation reaction of monochlorobenzene with chloral in presence of 20% oleum as catalyst produces DDT. The reaction temperature is maintained at _____________ °C ?

a. 15-30
b. 90-100
c. 250-300
d. < 0
Answer  Explanation 

ANSWER: 15-30

Explanation:
No explanation is available for this question!


33)   Paper pulp produced by Kraft/sulphate process is__________________ ?

a. Bleached easily
b. Dull white in color
c. Strong fibrous
d. Dark colored
Answer  Explanation 

ANSWER: Strong fibrous

Explanation:
No explanation is available for this question!


34)   White phosphorous is stored under water, because __________________?

a. It does not react with water
b. It is poisonous
c. Its kindling temperature in dry air is very low
d. It is unstable
Answer  Explanation 

ANSWER: Its kindling temperature in dry air is very low

Explanation:
No explanation is available for this question!


35)   Styrene is produced from ethyl benzene by the process of________________?

a. Dehydrogenation
b. Oxidation
c. Alkylation
d. Dehydration
Answer  Explanation 

ANSWER: Dehydrogenation

Explanation:
No explanation is available for this question!


36)   Pure rectified spirit contains about _________________ percent alcohol?

a. 45
b. 70
c. 95
d. 99.5
Answer  Explanation 

ANSWER: 95

Explanation:
No explanation is available for this question!


37)   The catalyst used in the manufacture of DDT (from chloral and chlorobenzene) is _________________?

a. Dilute H2SO4
b. Oleum
c. Ultraviolet light
d. None of these
Answer  Explanation 

ANSWER: Oleum

Explanation:
No explanation is available for this question!


38)   Solvay process as compared to dual process (i.e. modified Solvay process) ?

a. Can use low grade brine
b. Has less corrosion problems
c. Involves higher investment in NH3 recovery units than that for crystallisation units for NH4Cl
d. Both B. and C.
Answer  Explanation 

ANSWER: Both B. and C.

Explanation:
No explanation is available for this question!


39)   Insulin is an __________________ drug?

a. Anti-malarial
b. Anti-TB
c. Antibiotic
d. None of these
Answer  Explanation 

ANSWER: None of these

Explanation:
No explanation is available for this question!


40)   Molasses is the starting material for the production of ___________________ ?

a. Alcohol
b. Essential oil
c. Fatty acids
d. Massecuite
Answer  Explanation 

ANSWER: Alcohol

Explanation:
No explanation is available for this question!