Which of the following processes can remove both temporary as well as permanent hardness of water?
Filtration
Boiling
Distillation
None of these
Correct Answer :
C. Distillation
Related Questions
In the manufacture of sulphuric acid from elemental sulphur, the following sequence of major operations is followed:
Furnace → converter → absorber
Furnace → evaporator → absorber
Furnace → converter → evaporator
Converter → furnace → absorber
In the Solvay process, the product from the calciner is
Light soda ash
Dense soda ash
Sodium bicarbonate
Dehydrated soda ash
Commercial production of Vanaspati is done by __________ of edible vegetable oils.
Hydrogenation
Oxidation
Hydrolysis
Hydrocracking
10% oleum comprises of 10% free
SO2
H2SO3
SO3
H2SO4
Which of the following processes is absent in glass manufacturing process?
Sintering
Annealing
Shaping or forming
Melting
A mixture of chlorine & sodium bromide acts as a/an
Insecticides
Analgesic drug
Fire retardant
Hydrogenation catalyst
Bromides contained in hot mother liquor is treated with __________ during manufacture of bromine from sea water.
SO3
Cl2
NH3
SO2
Catalyst used in the hydrogenation of oil is
Nickel
Platinum
Iron
Alumina
Which of the following is a disaccharide?
Sucrose
Glucose
Starch
Maltose
Thermosetting materials
Are cross-linked molecules
Soften on application of heat
Are solvent soluble
None of these
__________ acid is the main constituent of cotton seed oil.
Acetic
Linoleic
Palmitic
Oleic
DDT stands for
Diethyl-diphenyl-trichloromethane
Dichloro-diphenyl-trichloromethane
diphenyl-dichloro-trichloromethane
Dichloro-diphenyl-trichloroethane
Refractory bricks having high thermal conductivity is desirable, when it is to be used in the
L.D. converter
Blast furnace
Rotary kiln
Recuperator
Metallic soap (e.g. aluminium or calcium salts of fatty acids) can be used
As a lubricant
As a rust preventive
In hard water for cleaning of cloth
As a foam depressant in distillation column
Which of the following is not produced commercially from sea water?
Magnesium & potassium compounds
Common salt
Bromine
Iodine
Raw materials for 'Solvay Process' for manufacture of the soda ash are
Salt, limestone and coke or gas
Ammonia, salt and limestone
Ammonia limestone and coke
None of these
Hydrogen gas is not produced commercially (for nitrogenous fertiliser manufacture) by
Iron-steam reaction
Electrolysis of water
Steam reforming of naphtha
Its cryogenic separation from coke oven gas
Chemical name of 'alum' is
Barium sulphate
Aluminium sulphate
Aluminium chloride
Calcium sulphate
A good quality coal should have
Low fusion point of ash
High ash content
High sulphur content
None of these
Chemical formula of 'salt cake' is
Na2SO4
CaSO4
MgSO4
BaSO4
Pick out the wrong statement.
Eosin requirement in tallow soap is about 40-50% which fastens the lather formation, softens the hard soaps and increases its cleansing action
Soap powder is prepared by mixing soap with hydrated sodium carbonate
Detergents differ from soaps in their action in hard water
Tarnish inhibitor (e.g., Benzotriazole) is added in soap to facilitate the removal of stains due to tea, blood etc
Chemical formula of BHC, which is an insecticide is
C6H6Cl6
C6Cl6
C6H5Cl
C6H4Cl2
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
Fire clay is __________ refractory material.
A basic
An acidic
A neutral
Not a
Comparing sulphate process with sulphite process, we find that __________ in the later.
Both temperature & pressure in the former is less than that
Both temperature & pressure in the former is more than that
Temperature is more in the former whereas pressure is more
Pressure is more in the former whereas temperature is less
In sulphate pulp manufacture, the pressure and temperature in the digestor is
10 atm., 800 °C
10 atm., 170-180°C
1 atm., 170 - 180°C
1 atm., 800°C
A bio-catalyst produced by living cells which acts independent of the cell is called a/an
Substrate
Enzyme
Nutrient
None of these
At a given temperature, the equilibrium yield of SO3 obtained from the oxidation of SO2 is proportional to (where, P = pressure of the system).
P
√P
P2
1/P
Enamels
Give good glossy finish
Are same as varnish
Are prepared from non-drying oil
Do not contain pigment
Phthalic anhydride is used
In making PVC
As plasticisers
In insecticides manufacture
For making nylon-6