Dacron (or Terylene) fibres as compared to nylon fibres have
Better heat & acid resistant properties
Poorer resistance to alkalis
Poorer dyeability
All (A), (B) and (C)
Correct Answer :
D. All (A), (B) and (C)
Related Questions
Glass is
Mainly CaO
Subjected to galvanising
A super cooled liquid
All (A), (B) and (C)
The drug used in contraceptives is
Sulfadiazine
Mestranol
Methyl salicylate
Penicillin
Terylene is
Same as Dacron
A polyester
Both (A) & (B)
Neither (A) nor (B)
Fat splitting catalyst is
CaCO3
ZnO
Al2O3
Fe
Enzymes are
Proteins with high molecular weight (around 10,000)
Derived from living organisms
Catalyst for temperature sensitive reactions
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
Hydrolysis of sugar is called
Hydration
Inversion
Esterification
None of these
__________ glass is used for the manufacture of optical glass.
Pyrex
Soda
Flint
Crooke's
Analgesic drugs are
Pain relievers
Antibiotics
Used in the treatment of T.B.
Used in the treatment of typhoid
Epoxy resin
Is a good adhesive
Is an elastomer
Cannot be used for surface coatings
Is a polyester
Hydrogenation of oil takes place in a/an __________ reactor.
Autothermal
Trickle bed
Plug flow
None of these
__________ acid is the main constituent of cotton seed oil.
Acetic
Linoleic
Palmitic
Oleic
Flux addition during smelting of ore is done to
Remove impurities/gangue
Enhance rate of reaction
Accelerate reduction of ore
Separate slag from metal
Sucrose is a
Monosaccharide
Disaccharide
Polysaccharide
None of these
Highly porous refractory bricks are
Less susceptible to chemical attack by molten fluxes and gases etc
Very strong
Having very high thermal conductivity
None of these
Which of the following is not present in bagasse fibre?
Cellulose
Lignin
Pentogens
None of these
The most stable allotropic form of phosphorous is the __________ phosphorous.
White
Black
Yellow
Red
__________ is an ore concentrating metallurgical process involving a chemical change.
Electromagnetic separation
Froth floatation
Roasting
None of these
Oxygen is separated by distillation from air after its liquefaction. The boiling point of oxygen is about __________ °C.
-83
-183
-196
-218
Percentage of uranium in Carnotite ore found in Jadugoda (Jharkhand) is about
0.1 to 0.5
1 to 5
5 to 10
15 to 25
Electric bulbs are made of __________ glass.
Jena
Flint
Crookes
Pyrex
Vulcanisation of rubber
Decreases its tensile strength
Increases its ozone & oxygen reactivity
Increases its oil & solvent resistance
Converts its plasticity into elasticity
The major constituents of glass are
Lime, clay and soda ash
Sand, lime and soda ash
Silica, alumina and clay
Silica, alumina and soda ash
Mercury cells for caustic soda manufacture, compared to diaphragm cells
Require lower initial investment
Require more power
Produce lower concentration NaOH
None of these
Bromides contained in hot mother liquor is treated with __________ during manufacture of bromine from sea water.
SO3
Cl2
NH3
SO2
Solvent extracted oil
Has low free fatty acid content
Is odourless
Has more of unsaturates
None of these
Fermentation is adversely affected by the
Presence of air
Absence of air
High concentration
Presence of ammonium salts
Grignard reagent is chemically known as
Ethyl magnesium chloride
Methyl magnesium chloride
Dichlorophenol
Monochloroacetic acid
Pick out the exothermic reaction out of the following:
C + H2O = CO + H2
CaC2 + H2O = Ca(OH)2 + C2H2
MgCO3 = MgO + CO2
All (A), (B) and (C)
Phosphoric acid is prepared from
Cryolite
Chalcopyrite
Rock phosphate
None of these