Which of the following is a constituent of coffee?
Caffeine
Nicotine
Calgon
Lignin
Correct Answer :
A. Caffeine
Related Questions
The most widely used coagulant for removing suspended impurities from water is
Bleaching powder
Chlorine
Calcium sulphate
Alum
High temperature carbonisation of coal produces
Inferior coke compared to low temperature carbonisation
Less of gases compared to liquid products
Larger quantity of tar compared to low temperature carbonisation
None of these
Pick out the wrong statement.
Eosin requirement in tallow soap is about 40-50% which fastens the lather formation, softens the hard soaps and increases its cleansing action
Soap powder is prepared by mixing soap with hydrated sodium carbonate
Detergents differ from soaps in their action in hard water
Tarnish inhibitor (e.g., Benzotriazole) is added in soap to facilitate the removal of stains due to tea, blood etc
Boiling of water containing temporary hardness produces
CO2
CaSO4
CaHCO3
None of these
Polythene is a/an __________ polymerisation product.
Addition
Condensation
Thermosetting
None of these
90% of the caprolactam is converted to nylon-6 on its condensation polymerisation in the reactor maintained at __________ °C.
< 0
10-30
250-280
500-600
Oils and fats are converted to soap in a process called
Hydrogenation
Esterification
Saponification
None of these
Coal tar is used as a
Binding material for coal briquettes
Fuel in rotary kiln
Binder in making carbon electrodes
All (A), (B) and (C)
Alkylbenzene sulfonate (ABS) is a
Detergent
Rubber
Pesticide
Polyester
Catalytic oxidation of naphthalene produces
Styrene
Phenol
Phthalic anhydride
None of these
Dichloro diphenyl __________ is the full form of DDT (an insecticide).
Tetrachloroethane
Trichloroethane
Tetrachloromethane
Trichloromethane
Catalyst used during the manufacture of 'Vanaspati Ghee' is
Zinc
Nickel
Platinum
Copper
Hydrochloric acid is also known as
Oil of vitriol
Muriatic acid
Strong organic acid
Green acid
Silicon carbide is a/an
Adhesive
Abrasive
Type of glass
Brittle material
Na2CO3 is called
Washing soda
Soda ash
Plaster of Paris
Calcite
Sea weeds are an important source of
Fluorine
Chlorine
Bromine
Iodine
Metallic soap is __________ salt of fatty acids.
Sodium
Potassium
Both sodium & potassium
Aluminium or calcium
Multistage catalytic converter is not used in the
Conversion of SO2 to SO3
NH3 synthesis reaction
Both (A) and (B)
Neither (A) nor (B)
Chlorine gas is produced by the electrolysis of brine (NaCl solution with solid NaCl make up) in mercury electrolytic cell. Which of the following is the anodic reaction?
Oxidation of Na+ ions
Oxidation of Cl- ions
Reduction of Na+ ions
Reduction of Cl- ions
The amount of benzene present in pure Benzol is about __________ percent.
30
50
70
90
Most easily and cheaply available fibrous raw material for paper manufacture available in India is bamboo. The yield of pulp produced from fibrous raw material by mechanical process is about __________ percent.
75
< 10
> 30
50
Function of sodium thiosulphate (hypo) in development of photographic film/plate is to
Brighten the faint images
Remove metallic silver
Convert silver chloride to silver
Remove unexposed silver halide
Mannheim furnace is used in the manufacture of
Hydrochloric acid
H2SO4 by Chamber process
Calcium carbide
Corundum
Varnish does not contain
Thinner
Pigment
Both (A) & (B)
Neither (A) nor (B)
CaO is called
Quick lime
Slaked lime
Limestone
Calcite
Oxygen is separated by distillation from air after its liquefaction. The boiling point of oxygen is about __________ °C.
-83
-183
-196
-218
Detergent is produced by the sulphonation of dodecyl benzene, which is an __________ reaction.
Endothermic
Exothermic
Irreversible
Both (B) and (C)
Hydrazine is largely used
As a starting material for 'hypo'
In photographic industry
As rocket fuel
In printing industry
Which of the following is not present in bagasse fibre?
Cellulose
Lignin
Pentogens
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