Related Questions

In the Kraft process of sulphate paper pulp manufacture, the black liquor and the white liquor storage tank is made of
A Concrete
B Wood
C Steel
D Porcelain
Mercury cells for caustic soda manufacture, compared to diaphragm cells
A Require lower initial investment
B Require more power
C Produce lower concentration NaOH
D None of these
Which of the following is a co-product during the manufacture of caustic soda by electrolysis of brine?
A Na2CO3
B NaHCO3
C H2
D None of these
In the kraft (sulphate) process for the paper manufacture, the digestor is made of
A Cast iron
B Stainless steel
C Karbate carbon
D Wrought iron
Black liquor is converted into white liquor by
A Evaporation and burning the concentrate followed by causticisation of products
B Multi-effect evaporation only
C Selective liquid extraction
D Extractive distillation
Which of the following is the most adverse factor challenging the choice of mercury electrolytic cell process for the production of caustic soda?
A High cost of mercury
B High specific gravity of mercury
C Non-availability of high purity mercury
D Pollution of water stream by mercury
Complete removal of __________ from gasoline is done by Unisol process using caustic soda and methyl alcohol.
A Waxes
B Mercaptans
C Asphalt
D Diolefins
The manufacture of Kraft pulp is done by a/an __________ process.
A Alkaline
B Acidic
C Neutral
D None of these
The major constituent of black liquor generated during paper manufacture is sodium
A Sulphate
B Carbonate
C Hydroxide
D Bi-carbonate
Black liquor generated during paper manufacture is concentrated in a
A Single effect evaporator
B Single effect evaporator followed by a crystalliser
C Multiple effect evaporator
D Multiple effect evaporators followed by a crystalliser

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