Le-Blanc process is a primitive process for the manufacture of
Caustic soda
Soda ash
Bromine from sea water
Hydrochloric acid
Correct Answer :
B. Soda ash
Related Questions
Which of the following is not responsible for causing permanent hardness of water?
Ca(HCO3)2
CaCl2
MgCl2
None of these
Salt is the basic raw material for the manufacture of
Cement
Glass
Potteries
Caustic soda
Fatty material used in soap making is
Fatty acid
Fatty alcohols
Tallow
Detergents
The most commonly used substance to speed up the sedimentation of sewage is
Lime
Sulphuric acid
Chlorine
Sodium bisulphite
Fusion of limestone and __________ produces high alumina cement.
Sand
Bauxite
Quicklime
Calcite
Coke oven gas consists mainly of
H2, & CH4
CO, & CO2
H2, & CO
CH4, & CO
__________ paper is used in the manufacture of newsprint paper.
Ground-wood
Board
Tissue
Wrapping
Nitrile rubber is produced by the polymerisation of
Acrylonitrile and butadiene
Acrylonitrile and styrene
Isobutylene and isoprene
None of these
Temperature during hydrogenation of oil should not be more than 200°C, otherwise it will result in
Pyrolysis of oil
Sintering of porous catalyst
Hydrogen embrittlement
All (A), (B) and (C)
Portland cement consists mainly of
CaO & SiO2
SiO2 & Al2O3
CaO & Al2O3
CaO & Fe2O3
Naphthalene is removed from coke oven gas by
Adsorbing on palladium
Absorbing in ethanolamine
Scrubbing with wash oil
Passing it through electrostatic precipitator
Commercial production of Vanaspati is done by __________ of edible vegetable oils.
Hydrogenation
Oxidation
Hydrolysis
Hydrocracking
Type of glass used in optical work is the __________ glass.
Soda-lime
Fibre
Lead
Borosilicate
Esterification reaction produces
Detergent
Vanaspati
Soap
Mercaptans
__________ Nature of hypo (sodium thiosulphate) makes it useful in photography.
Oxidising
Reducing
Complex forming
Photochemical
Chemical formula of 'salt cake' is
Na2SO4
CaSO4
MgSO4
BaSO4
Na2CO3.10H2O is called
Washing soda
Soda ash
Slaked lime
Quicklime
High magnesia lime is added to hot sugar cane juice (during the manufacture of sugar) to
Flocculate the impurities
Facilitate fast filtration
Both (A) and (B)
Neither (A) nor (B)
Dehydrogenation of ethyl benzene produces
Styrene
Naphthalene
Phenol
Benzoic acid
Deaeration of water in its treatment is necessary, as it
Minimises its turbidity
Helps in controlling its taste and odour
Minimises its corrosiveness
None of these
Pick out the wrong statement pertaining to the soap manufacture.
Transparent soaps are made by cold process
Organic pigments are used as colouring materials in the soap manufacture
Both laundry as well as toilet soaps are manufactured by hot process
Colourless rosin is used in the manufacture of laundry soaps
Most commonly used rubber vulcanising agent is
Sulphur
Bromine
Platinum
Alumina
Ethyl alcohol cannot be produced
From waste sulphite substrate of paper mills
By Esterification and hydrolysis of ethylene
From molasses
None of these
__________ is an ore concentrating metallurgical process involving a chemical change.
Electromagnetic separation
Froth floatation
Roasting
None of these
20% oleum means that in 100 kg oleum, there are 20 kg of
SO3 and 80kg of H2SO4
H2SO4 and 80kg of SO3
SO3 for each 100 kg of H2SO4
None of these
__________ are used as corrosion inhibitor for iron & steel in aqueous solutions.
Phosphates
Chromates
Sulphates
Bi-carbonates
Thermosetting materials
Are cross-linked molecules
Soften on application of heat
Are solvent soluble
None of these
Calcareous & argillaceous materials are used in the manufacture of
Lead
Cement
Carbon disulphide
None of these
Which of the following is a bleaching agent added in the detergents to facilitate removal of stains caused due to blood, tea etc?
Sodium silicate
Sodium borate
Sodium tripolyphosphate (STPP)
Caustic soda
Mercury electrolytic cells are preferred over diaphragm electrolytic cell (for production of caustic soda), as it
Has larger production capacity per unit cell
Consumes less power per ton of Cl2 produced
Produces high purity (70%) caustic soda directly
All (A), (B) and (C)