The major constituent of black liquor generated during paper manufacture is sodium
Sulphate
Carbonate
Hydroxide
Bi-carbonate
Correct Answer :
B. Carbonate
Related Questions
__________ Nature of hypo (sodium thiosulphate) makes it useful in photography.
Oxidising
Reducing
Complex forming
Photochemical
Sea water contains about __________ ppm of bromine.
5
70
500
1700
Oxidation of ortho-xylene in presence of __________ catalyst is done to produce phthalic anhydride on commercial scale.
Nickel
Vanadium
Alumina
Iron
Antibiotic
Inhibits/destroys the growth of microorganisms
Is used as a pain reliever
Is an antimalarial
Is an anaesthetic
Proximate analysis of coal determines its __________ content.
Moisture, ash, sulphur & volatile matter
Moisture & volatile matter
Moisture, sulphur, nitrogen & fixed carbon
None of these
Fat splitting catalyst is
CaCO3
ZnO
Al2O3
Fe
The most economical pulp for the production of newsprint would be the __________ pulp.
Ground-wood
Sulphate
Sulphite
Semi-chemical
Titanium dioxide is a/an __________ colour pigment.
White
Black
Yellow
Blue
At very high concentration of enzymes, the rate of fermentation chemical reaction is __________ the concentration of reactants.
Independent of
Directly proportional to
Inversely proportional to
Proportional to the square of
Viscose rayon is
Cellulose nitrate
Regenerated cellulose nitrate
Regenerated cellulose acetate
None of these
BHC (Benzene hexachloride) is made by the chlorination of benzene
Which is an addition reaction
Which is a substitution reaction
In absolute dark
In presence of sunlight
Use of hydrated lime in water treatment
Before filtration, reduces the bacterial load on filters
After filtration, combats the corrosiveness of water due to the presence of O2 & CO2
Is to adjust the pH value
All (A), (B) and (C)
SO2 is bubbled through hot sugar cane juice to
Act as an acidifying agent
Increase its concentration
Increase the amount of molasses
Increase the crystal size
Margarine is a/an
Fat
Explosive
Plasticiser
Rocket propellant
H2S is scrubbed from refinery gases by absorption using
Dilute H2SO4
Ethanol amine
Chilled water
Tri-butyl phosphate
One of the steps during refining of cane sugar consists of addition of hydrated lime to the sugar syrup followed by carbonation of the resulting solution. The purpose of this step is to
Adjust the pH of the syrup
Remove the coloring matter from the syrup
Reduce the viscosity of the syrup
Improve the rate of crystallisation of sugar
__________ is a thermosetting plastic.
Polyvinyl chloride
Polythene
Bakelite
Teflon
The process used for the manufacture of ethyl alcohol from molasses is
Distillation
Dehydration
Dehydrogenation
None of these
In primitive days, __________ was being manufactured by Leblanc Process.
Alum
Washing soda
Soda ash
Calcium carbide
A bio-catalyst produced by living cells which acts independent of the cell is called a/an
Substrate
Enzyme
Nutrient
None of these
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)
Fermentator temperature during production of alcohol from molasses is around __________ °C.
5
30
130
300
Solvay process is not used for the manufacture of potassium carbonate, because of the reason that potassium bicarbonate
Is prone to thermal decomposition
Has high water solubility and is unstable
Is soluble in ammonium chloride and potassium chloride solution
All (A), (B) and (C)
Absorption of SO3 in 97% H2SO4 is
Exothermic
Endothermic
Not possible
None of these
The main aim behind cooling the digested chip at the bottom portion of the digestor by injecting cold black liquor is to
Avoid mechanical weakening of fibre
Remove lignin by way of crystallisation
Increase the cellulose content
None of these
Chemical name of soda ash is
Sodium bicarbonate
Sodium thiosulphate
Potassium carbonate
None of these
The terminology 'BTX' used in coal tar distillation industry refers to
Benzol-toluol-xylol
Benzol-toluene-xylene
Benzene-toluol-xylol
Benzene-toluene-xylene
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
Fatty material used in soap making is
Fatty acid
Fatty alcohols
Tallow
Detergents
__________ is produced using molasses as the starting raw material.
Methyl alcohol
Ethyl alcohol
Benzol
Dimethyl ether