Cellulose content of bamboo and ideal fibrous raw material for the manufacture of paper is __________ percent.
10
50
80
95
Correct Answer :
B. 50
Related Questions
Riboflavin is a/an
Vitamin
Analgesic drug
Anaesthetics
Anti-malarial drug
Which of the following is not responsible for causing permanent hardness of water?
Ca(HCO3)2
CaCl2
MgCl2
None of these
Bio-degradable detergents
Can be readily oxidised
Pose problem in sewerage plant
Have an isoparaffinic structure
Should not be used as it spoils the cloth
Hydrogenation of vegetable oils is a/an __________ reaction.
Endothermic
Autocatalytic
Exothermic
Homogenous
Type of glass used in optical work is the __________ glass.
Soda-lime
Fibre
Lead
Borosilicate
Which allotrope of sulphur is insoluble in carbon disulphide?
Rhombic sulphur
Monoclinic sulphur
Plastic sulphur
Milk of sulphur
Pick out the wrong statement.
DDT is manufactured by the condensation of chlorobenzene with chloral at 30°C in presence of oleum, which is a highly exothermic reaction
Chloral is obtained by the chlorination of ethyl alcohol
Insecticides acting on the insects through the respiratory system are called fumigants
Benzene hexachloride is not a contact insecticide
Hydrolysis of sugar is called
Hydration
Inversion
Esterification
None of these
Fatty material used in soap making is
Fatty acid
Fatty alcohols
Tallow
Detergents
Nickel is not used as a catalyst in the __________ reaction.
Shift conversion
Oil hydrogenation
Steaming reforming of naphtha
Ammonia cracking/dissociation
In industrial nomenclature, alcohol means
Butyl alcohol
Propyl alcohol
Ethanol
Methyl alcohol
Which of the following sugars is the sweetest?
Glucose
Fructose
Sucrose
Lactose
Bromine is used in the preparation of
Fire extinguishing compounds
Fire proofing agents
Dyes and antiknock compounds
All (A), (B) and (C)
CaCl(OCl) is the chemical formula of
Hypo
Bleaching powder
Plaster of Paris
Aqua regia
Hydrogenation of edible vegetable oils
Is an exothermic reaction
Increases their melting point
Is done in presence of nickel catalyst
All (A), (B) and (C)
Direct conversion of chemical energy into electrical energy is done in a
Magnetohydrodynamic (MHD) generator
Fuel cell
Fast breeder reactor
None of these
Which of the following is an yellow pigment?
Titanium dioxide
Ferrous sulphate
Lead chromates
Zinc sulphides
10% oleum comprises of 10% free
SO2
H2SO3
SO3
H2SO4
Phosphoric acid is prepared from
Cryolite
Chalcopyrite
Rock phosphate
None of these
Presence of sodium tripolyphosphate (an additive) in synthetic detergent
Facilitates its use even in hard water (by sequestering the water-hardening Ca & Mg ions)
Inhibits its corrosive effects
Does not allow redeposition of dirt on the cleaned surface
None of these
Neoprene is a
Monomer
Synthetic rubber
Polyester
None of these
Mercury electrolytic cell produces 50-70% NaOH solution. Its operating temperature is __________ °C.
25
60-70
150-200
250-300
Common salt is generally not produced commonly by __________ method from brine.
Freeze drying
Electrolytic
Solar evaporation
Vacuum evaporation
Fusion of bauxite and __________ produces high alumina cement.
Alum
Limestone
Coke
Quartz
A 'unit process' is exemplified by the
Distillation
Hydrogenation of oils
Absorption
Humidification
Vinyl chloride (CH2 = CH.Cl) is produced by the thermal pyrolysis of ethylene dichloride at a pressure & temperature of
4 kgf/cm2 & 500°C
10 kgf/cm2 & 1000°C
40 kg/cm2 & 200°C
100 kgf/cm2 & 500°C
Most widely and commonly used coagulant for the removal of suspended impurities in water is
Bleaching powder
Slaked lime
Alum
Copper sulphate
Hydrazine (N2H4) is used mainly as a/an
Explosive
Rocket fuel
Detergents additive
None of these
Catalyst used in the oxidation of benzene to produce Maleic anhydride is
V2O5
Pt
Ni
Cr
The difference between saponification value and acid value is
Called ester value
Always negative
Constant for all fatty oils
None of these