Carboxymethyl cellulose (CMC) is added in detergents to
Prevent redeposition of soil on cleaned surface
Act as optical brightening agent
Inhibit corrosion in washing machines made of aluminium
None of these
Correct Answer :
A. Prevent redeposition of soil on cleaned surface
Related Questions
Type of glass used in optical work is the __________ glass.
Soda-lime
Fibre
Lead
Borosilicate
Wax is a
Mixture of glycerides
Mixture of esters of polyhydric alcohols excepting glycerine
Liquid at room temperature
Mixture of glycerides of fatty acids
White phosphorous is stored under water, because
It does not react with water
It is poisonous
Its kindling temperature in dry air is very low
It is unstable
Solvay process is used for the manufacture of
Caustic soda
Soda ash
Caustic potash
Soda lime
Proximate analysis of coal determines its __________ content.
Moisture, ash, sulphur & volatile matter
Moisture & volatile matter
Moisture, sulphur, nitrogen & fixed carbon
None of these
Air used in aerobic fermentation must be sterilized, otherwise the
Recovery of product will be difficult
Contamination of pure culture would result
Uniformity of product cannot be achieved
None of these
Chemical formula of oleum is
H2SO3
H2SO4
H2S2O7
H2SO7
Which of the following processes does not produce Cl2 as a co-product during the manufacture of caustic soda?
Diaphragm electrolytic cell process
Mercury electrolytic cell process
Lime-soda process
None of these
Calcination of limestone is not done in a __________ kiln for producing lime.
Vertical shaft
Rotary
Fluidised bed
Fixed bed
Shrinkage volume in cement setting does not depend upon the
Sand to cement ratio
Water to cement ratio
Ambient temperature fluctuation
Drying period
Absorption of SO3 in 97% H2SO4 is
Exothermic
Endothermic
Not possible
None of these
Double Contact Double Absorption (DCDA) process is the most recent process for the manufacture of
Nitric acid
Sulphuric acid
Ammonium sulphate
Hydrochloric acid
Cumene is the starting material for the production of
Benzoic acid
Phenol and acetone
Isoprene
Styrene
Good quality of edible salt is obtained from brine by the process of
Solar evaporation
Vacuum evaporation
Freeze drying
Electrolysis
High purity nitrogen is used in
Making protective gas (95% N2 + 5% H2) for annealing of cold rolled steel strip coils
Fire fighting purposes
Both (A) & (B)
Neither (A) nor (B)
Penicillin, an antibiotic drug was discovered by
Alexander
Flaming
Doctor Zhivago
None of these
Production of one ton of dry paper pulp requires about __________ tons of bamboo or wood.
1
2.5
5
10
Which of the following may be viewed as a catalyst in the manufacture of soda ash by Solvay process?
NH3
NaCl
CaO
Coke
Fluorescent dyes are added in detergents to
Act as fabric brightener (by converting ultraviolet light to visible light) thereby improving the whiteness appearance of white fabrics
Attain distinctiveness from other brands
Act as tarnish inhibitor for metals like German silver
None of these
Massecuite is a terminology used in the __________ industry.
Paint
Oil hydrogenation
Soap
Sugar
Presence of carbonaceous matter in the sewage
Causes reduction in its dissolved oxygen content thereby endangering the life of aquatic creatures
Reduces sulphate ions to sulphides causing obnoxious smell
Increases the quantity of chlorine used for its purification
All (A), (B) and (C)
90% of the caprolactam is converted to nylon-6 on its condensation polymerisation in the reactor maintained at __________ °C.
< 0
10-30
250-280
500-600
The function of gypsum addition during cement making is to
Increase the density of cement
Decrease the cement setting rate
Both (A) and (B)
Neither (A) nor (B)
A mineral is termed as 'ore', if
A metal can be economically extracted from it
It contains ≥ 40% metal
The metal present in it is costly
All (A), (B) and (C)
The only commercial Fischer-Tropsch plant for producing liquid hydrocarbon fuel from coal is located at
SASOL (in South Africa)
Redcar (U.K.)
Los Angeles (U.S.A.)
Trombay (India)
Heating of __________ to 120°C, produces plaster of paris.
Blue vitriol
Gypsum
Calcium silicate
Calcium sulphate
Which of the following is not a food additive?
Citric acid
Invertage
Benzoyl peroxide
Ammonium chloride
Nickel is not used as a catalyst in the
Fischer-Tropsch process
Shift conversion
Hydrogenation of oil
Ostwald's process of HNO3 manufacture
Kaolin is a/an
Refractory material
Synthetic resin
Artificial abrasive
Blue pigment
Use of chlorine in the treatment of sewage
Helps in grease separation
Increases the biological oxygen demand (BOD)
Causes bulking of activated sludge
Aids in flocculation