section 2

Question 1

Calgon used in water treatment is chemically
a. sodium phosphate
b. sodium hexametaphosphate
c. calcium phosphate
d. tricresyl phosphate

Answer 1

b

Question 2

Which oil is preferred for paint manufacture?
a. Drying oil
b. Non-drying oil
c. Semi-drying oil
d. Saturated oil

Answer 2

a

Question 3

Styrene butadiene rubber (SBR) is
a. a natural rubber.
b. a synthetic polymer.
c. a synthetic monomer.
d. another name of silicone rubber.

Answer 3

b

Question 4

Ethylene oxide is produced by oxidation of ethylene in presence of AgO catalyst at
a. 1 atm & 100°C
b. 5 atm & 275°C
c. 100 atm & 500°C
d. 50 atm & 1000°C

Answer 4

b

Question 5

Glycerine is not used in the
a. manufacture of explosive.
b. conditioning and humidification of
tobacco.
c. manufacture of pharmaceuticals.
d. none of these.

Answer 5

d

Question 6

Cumene is the starting material for the production of
a. benzoic acid
b. phenol and acetone
c. isoprene
d. Styrene

Answer 6

b

Question 7

The type of high refractive index glass used in optical instruments is __________ glass.
a. pyrex
b. flint
c. crookes
d. none of these

Answer 7

b

Question 8

Oxidation of ortho-xylene in presence of __________ catalyst is done to produce phthalic
anhydride on commercial scale.
a. nickel
b. vanadium
c. alumina
d. Iron

Answer 8

b

Question 9

Most commonly used rubber vulcanising agent is
a. sulphur
b. bromine
c. platinum
d. Alumina

Answer 9

a

Question 10

Terylene is
a. same as dacron
b. a polyester
c. both (a) & (b)
d. neither (a) nor(b)

Answer 10

c

Question 11

Free alkali in a toilet soap is __________ that in
a laundry shop.
a. less than
b. more than
c. same
d. none of these

Answer 11

a

Question 12

Dehydrogenation of isopropanol produces
a. propyl alcohol
b. acetone
c. trichloroethylene
d. Formaldehyde

Answer 12

b

Question 13

Pick out the wrong statement.

a. Eosin requirement in tallow soap is about 40-50% which fastens the lather formation, softens the hard soaps and increases its cleansing action.
b. Soap powder is prepared by mixing soap
with hydrated sodium carbonate.
c. Detergents differ from soaps in their action
in hard water.
d. Tarnish inhibitor (e.g., benzotriazole) is
added in soap to facilitate the removal of
stains due to tea, blood etc.

Answer 13

d

Question 14

Concentration of hydrogen peroxide is done by
a. crystallisation
b. vacuum crystallisation
c. atmospheric distillation
d. Dehydration

Answer 14

b

Question 15

Helium is produced on commercial scale from
a. air
b. natural gas
c. coke oven gas
d. none of these

Answer 15

b

Question 16

Fermentation of molasses to produce ethyl alcohol is done at __________ °C
a. 20 - 30
b. < - 5
c. 100 - 150
d. 250 - 300

Answer 16

a

Question 17

The catalyst used in the manufacture of DDT is
a. alumina.
b. silica.
c. 20% oleum.
d. aluminium chloride.

Answer 17

c

Question 18

18. Most widely and commonly used coagulant for the removal of suspended impurities in water is
    a. bleaching powder
    b. slaked lime
    c. alum
    d. copper sulphate

Answer 18

c

Question 19

__________ is used as a catalyst in fat splitting.
a. ZnO
b. Ni
c. V2O5
d. FeO

Answer 19

a

Question 20

Which of the following is not produced on commercial scale from sea water?
a. Bromine.
b. Magnesium compounds.
c. Potassium compounds.
d. Sodium sulphate.

Answer 20

d

Question 21

Heating of __________ to 120°C, produces plaster of paris.
a. blue vitriol
b. gypsum
c. calcium silicate
d. calcium sulphate

Answer 21

b

Question 22

Pick out the wrong statement.
a. Conversion of SO2 to SO3 in Monsanto-4 pass converter is about 98%.
b. The chemical formula of oleum is H2S2O7,which is formed by saturating sulphuric acid with sulphur trioxide.
c. Vitriol oil is nothing but technical sulphuric acid.
d. Decomposition of sulphuric acid on heating
does not start before its boiling.

Answer 22

d

Question 23

Which of the following has sodium bicarbonate as its main constituent?
a. Baking soda
b. Baking powder
c. Washing soda
d. none of these

Answer 23

b

Question 24

Ordinary glass is not a/an
a. amorphous isotropic material.
b. supercooled liquid.
c. material with sharp definite melting point.
d. electrical insulator.

Answer 24

c

Question 25

In premitive days, __________ was being manufactured by Leblanc Process. a. alum b. washing soda c. soda ash d. calcium carbide

Answer 25

c

Question 26

The only commercial Fischer-Tropsch plant for producing liquid hydrocarbon fuel from coal is located at a. SASOL (in South Africa). b. Redcar (U.K.). c. Los-Angles (U.S.A.). d. Trombay (India).

Answer 26

a

Question 27

Lurgi coal gasifier is a pressurised __________ bed reactor. a. moving b. fixed c. fluidised d. Entrained

Answer 27

a

Question 28

Oils are partially hydrogenated (not fully) to manufacture vanaspati, because fully saturated solidified oils a. cause cholesterol build up and blood clotting. b. are prone to rancid oxidation. c. always contain some amount of nickel (as their complete removal is very difficult). d. have affinity to retain harmful sulphur compounds.

Answer 28

a

Question 29

Paper grade bamboo contains about __________ percent cellulose. a. 5 b. 20 c. 40 d. 60

Answer 29

a

Question 30

Carboxymethyl cellulose (CMC) is added in detergents to act as a/an a. surfactant b. builder c. optical brightening agent d. anti soil redeposition agent

Answer 30

d

Question 31

Vulcanisation of rubber a. decreases its tensile strength. b. increases its ozone & oxygen reactivity. c. increases its oil & solvent resistance. d. converts its plasticity into elasticity.

Answer 31

d

Question 32

Raw materials for 'Solvay Process' for manufacture of the soda ash are a. salt, limestone and coke or gas. b. ammonia, salt and limestone. c. ammonia limestone and coke. d. none of these.

Answer 32

a

Question 33

Chloral is used in the manufacture of a. DDT b. BHC c. parathion d. none of these

Answer 33

a

Question 34

Bromine is used in the preparation of a. fire extinguishing compounds. b. fireproofing agents. c. dyes and antiknock compounds. d. all (a), (b) and (c)

Answer 34

d

Question 35

Sudden temperature fluctuation does not affect pyrex glass, because of its a. low co-efficient of expansion. b. high co-efficient of expansion. c. high melting point. d. both (b) and (c).

Answer 35

a

Question 36

The process used for the manufacture of ethyl alcohol from molasses is a. distillation b. dehydration c. dehydrogenation d. none of these

Answer 36

d

Question 37

Most easily and cheaply available fibrous raw material for paper manufacture available in India is bamboo. The yield of pulp produced from fibrous raw material by mechanical process is about __________ percent. a. 75 b. < 10 c. > 30 d. 50

Answer 37

b

Question 38

Absorption of SO3 in 97% H2SO4 is a. exothermic b. endothermic c. not possible d. none of these

Answer 38

a

Question 39

__________ process is used for the commercial production of nitric acid by the catalytic oxidation of ammonia. a. Solvay b. Ostwald's c. Haber's d. none of these

Answer 39

b

Question 40

Sulphuric acid solution having a specific gravity of 1.20 at room temperature is used mainly for the a. fertiliser manufacture b. car battery solution c. synthesis of oleum d. water treatment

Answer 40

b

Question 41

The catalyst used in the production of elemental sulphur from H2S (by oxidation-reduction) is a. alumina b. silica gel c. platinum d. Nickel

Answer 41

a

Question 42

A good quality coal should have a. low fusion point of ash b. high ash content c. high sulphur content d. none of these

Answer 42

d

Question 43

Zeolite used in water softening process (cation exchange) is regenerated by washing with a. brine b. chloramines c. sodium bisulphite d. liquid chlorines

Answer 43

a

Question 44

The catalyst used in shift converter is a. nickel b. vanadium c. silica gel d. Alumina

Answer 44

a

Question 45

Which of the following is a detergent? a. Benzene hexachloride b. Alkyl benzene sulphonate c. Polytetraflouroethylene d. Cellulose nitrate

Answer 45

b

Question 46

Drinking (potable) water treatment does not involve a. coagulation b. sedimentation c. softening d. Disinfection

Answer 46

c

Question 47

Phenol formaldehyde resin is used as an adhesive in making a. laminates b. card boxes c. furniture d. Books

Answer 47

a

Question 48

Pick out the correct statement. a. A fat is converted into oil by its hydrogenation. b. There is no difference between a fat and an oil so far as its physical properties are concerned. c. All vegetable oils except coconut oil, contains fatty acids having more than sixteen carbon atoms. d. Vegetable oils are classified as drying, non-drying and semi drying oils depending upon their fatty acids content.

Answer 48

c

Question 49

DDT should not be allowed to come in contact with iron (during its manufacture) to a. avoid its decomposition. b. prevent sulphonation of the monochlorobenzene by the acid catalyst. c. achieve non-hygroscopic property. d. none of these.

Answer 49

a

Question 50

Catalyst used in the manufacture of sulphuric acid by chamber & contact processes are respectively a. V2O5 & Cr2O3. b. oxides of nitrogen & Cr2O3. c. V2O5 on a porous carrier & oxides of nitrogen. d. oxides of nitrogen & V2O5 on a porous carrier.

Answer 50

d