Production of alcohol by fermentation of molasses is a/an __________ process.
Anaerobic
Aerobic
Endothermic
Both (B) and (C)
Correct Answer :
B. Aerobic
Related Questions
Potassium is kept & transported under
Water
Liquid ammonia
Kerosene oil
Alcohol
Which of the following is used as a coagulant in treating turbid water?
Chlorine
Ferric sulphate
Calcium sulphate
Activated carbon
Sizing material is incorporated in paper to
Impart resistance to penetration by liquids
Increase its thickness
Increase its flexibility & opacity
Increase its brightness
Detergent is produced by the sulphonation of dodecyl benzene, which is an __________ reaction.
Endothermic
Exothermic
Irreversible
Both (B) and (C)
Ethyl alcohol cannot be produced
From waste sulphite substrate of paper mills
By Esterification and hydrolysis of ethylene
From molasses
None of these
'Hollander beater' machine used in the paper manufacturing plant does not accomplish the task of
Final rolling out of paper
Cutting of fibres
Hydration of fibres
Fibrillation of fibre
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
Nitrile rubber is produced by the polymerisation of
Acrylonitrile and butadiene
Acrylonitrile and styrene
Isobutylene and isoprene
None of these
Dacron is a
Condensation product of Hexamethylene diamine and adipic acid
Thermosetting material
Condensation product of dimethyl terephthalate and ethylene glycol
None of these
Styrene is produced from ethyl benzene by the process of
Dehydrogenation
Oxidation
Alkylation
Dehydration
Alcohol content in freshly prepared natural and fortified wine may be respectively around __________ percent.
7-14 and 14-30
7-14 and 40-50
14 - 30 and 40-50
10 - 20 and 40 - 50
The basic difference between vegetable oils and fats is in their
Density
Chemical properties
Physical state
Composition
Pitch (a product of coal tar distillation) is always mixed with creosote oil, when it is to be burnt in a burner, because
Its calorific value is very less
Tar neutralises the residual acids present in pitch
It reduces viscosity and imparts fluidity for its transportation through pipelines at economic pressure drop
All (A), (B) and (C)
Nylon-66 is manufactured from
Hexamethylene diamine and adipic acid
Hexamethylene diamine and Maleic anhydride
Caprolactam
Dimethyl terephthalate and ethylene glycol
The basic constituent of vegetable oils is
Triglyceride
Fatty acids
Fatty alcohol
Mono esters
Bleaching of paper pulp is done with
Activated clay
Bromine
Chlorine or chlorine dioxide
Magnesium sulphite
Catalytic oxidation-dehydrogenation of methyl alcohol produces
Formaldehyde
Phenol
Acetone
Maleic anhydride
Bromine is used in the preparation of
Fire extinguishing compounds
Fire proofing agents
Dyes and antiknock compounds
All (A), (B) and (C)
Main constituents of cotton fiber is
Lignin
Cellulose
Starch
Gelatine
Nitric acid is not used in the manufacture of
Detergents
Fertilisers
Aqua regia
Explosives
__________ process is used for the manufacture of sodium carbonate by ammonia soda process.
Ostwald's
Bosch
Solvay
Haber's
Which of the following additives/water proofing agents is added to lower the hydrophilic (moisture loving) characteristic of cement?
Xanthates
Stearic acid
Calcium & aluminium stearate
Formic acid
Paper grade bamboo contains about __________ percent cellulose.
5
20
40
60
Chrome tanning and vegetable tanning are done for
Light & heavy leather respectively
Heavy & light leather respectively
Both light & heavy leather
Neither light nor heavy leather
Neoprene is the trade name of
Polyurethane
Phenol formaldehyde
Polychlorophrene
Styrene-butadiene rubber
A bio-catalyst produced by living cells which acts independent of the cell is called a/an
Substrate
Enzyme
Nutrient
None of these
__________ paper is used in the manufacture of newsprint paper.
Ground-wood
Board
Tissue
Wrapping
In the production of soda ash by Solvay process, the by-product is
CaCl2
NH4Cl
NH3
NaOH
Bakelite is
Same as Polytetrafluoroethylene (PTFE)
An inorganic polymer
Same as thermosetting phenol-formaldehyde
Not a polymer
Bisphenol A is produced by the condensation of acetone with
Formaldehyde
Ethyl alcohol
Diethyl ether
Phenol