Addition of calcium oxide to water produces
Exothermic heat
Hissing sound
Slaked lime
All (A), (B) & (C)
Correct Answer :
D. All (A), (B) & (C)
Related Questions
Pick out the wrong statement.
Catalytic hydrogenation of carbon monoxide produces methyl alcohol
In nylon-6, the number 6 represents the total number of carbon atoms in the ring
Raw materials for DDT manufacture are benzene and chlorine
Ethanolamines are produced by using ammonia and ethylene oxide as raw material
Which of the following contains least amount of N2?
Coke oven gas
Blast furnace gas
Producer gas
Water gas (blue gas)
Solvent extracted oil
Has low free fatty acid content
Is odourless
Has more of unsaturates
None of these
Function of thinner in a paint is to
Accelerate the oxidation of oil
Prevent gelling of the paint
Suspend pigments & dissolve film forming materials
Form a protective film
Pick out the endothermic reaction out of the following.
C+ ½O2 = CO
CO + 3H2 = CH4 + H2O
CaCO3 = CaO + CO2
CO + ½O2 = CO2
Fat dispersed in water is exemplified by
Colloids
Gel
Butter
Emulsion
Litharge is
Lead oxide
Zinc oxide
Zinc sulphide
Cellulosic photographic material
Which of the following is not a product of coal tar distillation?
Anthracene
Creosote oil
Carbolic oil
None of these
Phthalic anhydride is used
In making PVC
As plasticisers
In insecticides manufacture
For making nylon-6
Bitterns is a/an
Unsaturated fat
Starting material for the production of iodine
By-product of chlor-alkali industry
None of these
Roasting of metallurgical ores is done mainly to
Dehydrate it
Sinter the ore
Remove CO2 & H2O
Remove arsenic & sulphur
Chloral is used in the manufacture of
DDT
BHC
Parathion
None of these
Polythene is a/an __________ polymerisation product.
Addition
Condensation
Thermosetting
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
Fermentation is adversely affected by the
Presence of air
Absence of air
High concentration
Presence of ammonium salts
Sucrose is a
Monosaccharide
Disaccharide
Polysaccharide
None of these
In the Lurgi coal gasifier
Coking coals cannot be used
Low carbon conversion efficiency is achieved
Entrainment of solids is higher
Large quantity of coal can be processed
Helium is produced on commercial scale from
Air
Natural gas
Coke oven gas
None of these
More than 100 percent of __________ is present in oleum.
SO3
H2SO4
H2SO3
SO2
Fatty material used in soap making is
Fatty acid
Fatty alcohols
Tallow
Detergents
Naphthalene is removed from coke oven gas by
Adsorbing on palladium
Absorbing in ethanolamine
Scrubbing with wash oil
Passing it through electrostatic precipitator
Platinum catalyst used in the earlier days of sulphuric acid manufacture by contact process suffers from the drawback like
High cost
Fragile nature
Easy poisoning tendency
All (A), (B) and (C)
In primitive days, __________ was being manufactured by Leblanc Process.
Alum
Washing soda
Soda ash
Calcium carbide
Metallic soap (e.g. aluminium or calcium salts of fatty acids) can be used
As a lubricant
As a rust preventive
In hard water for cleaning of cloth
As a foam depressant in distillation column
Which catalyst is used in the manufacture of ethylene oxide by oxidation of ethylene?
AgO
Al2O3
ZnCl2
Fe2O3
Pure rectified spirit contains about __________ percent alcohol.
45
70
95
99.5
Which of the following is a detergent?
Fatty alcohol
Alkyl benzene sulphonate (ABS)
Fatty acids
Methylene chloride
Oil is a/an
Mixture of glycerides
Mixture of glycerides of fatty acids
Solid at normal temperature
Ester of alcohols other than glycerine
Sizing material is incorporated in paper to
Impart resistance to penetration by liquids
Increase its thickness
Increase its flexibility & opacity
Increase its brightness
Chloramines are used in water treatment for
Disinfection and control of taste & odour
Corrosion control
Removing turbidity
Control of bacteria