Main product in calcium carbide-water reaction is
Ca(OH)2
C2H2
CO2
CaCO3
Correct Answer :
B. C2H2
Related Questions
Antibiotic
Inhibits/destroys the growth of microorganisms
Is used as a pain reliever
Is an antimalarial
Is an anaesthetic
The purpose of adding Na2CO3 to water of low alkalinity is to
Permit the use of alum as a coagulant
Increase the softening capacity of zeolite
Facilitate easy regeneration of zeolite
All (A), (B) and (C)
Plaster of Paris is
CaSO4. ½H2O
Used for setting of broken bones
Both (A) and (B)
Same as gypsum
Which of the following, when pyrolysed, produces Perchloroethylene?
Ethylene dichloride
Chlorobenzene
Carbon tetrachloride
Chlorinated paraffin
Ca(OH)2 is called
Quicklime
Slaked lime
Limestone
Gypsum
__________ is an ore of lead.
Quartz
Galena
Siderite
Chalcopyrite
Thermoplastic materials
Do not soften on application of heat
Are heavily branched molecules
Are solvent insoluble
None of these
Reaction of an alcohol with organic acid is called the __________ reaction.
Saponification
Esterification
Neutralisation
Acidification
99.5% purity oxygen is used in
Cutting and welding by oxy-acetylene flame
Hospitals for medicinal purposes
Gas masks and artificial breathing apparatus
All (A), (B), and (C)
Brackish water which contains mostly dissolved salt, can be purified by the __________ process.
Reverse osmosis
Sand filter
Lime soda
Permutit
Phenolic antiseptics are added in the __________ soap.
Shaving
Medicated
Metallic
Transparent
Isopropyl benzene produced by alkylation of benzene with propylene is known as
Neoprene
Cumene
Gelatin
Mercaptans
Graphite is a/an
Electrical insulator
Allotrope of carbon
Moderator used in nuclear reactor
Both (B) and (C)
__________ are used as corrosion inhibitor for iron & steel in aqueous solutions.
Phosphates
Chromates
Sulphates
Bi-carbonates
Fermentation of molasses to produce ethyl alcohol is done at __________ °C.
20 - 30
< - 5
100 - 150
250 - 300
Production of alcohol by fermentation of molasses is a/an __________ process.
Anaerobic
Aerobic
Endothermic
Both (B) and (C)
White phosphorous is stored under water, because
It does not react with water
It is poisonous
Its kindling temperature in dry air is very low
It is unstable
Gypsum is chemically
Calcium chloride
Potassium sulphate
Sodium sulphate
Calcium sulphate
Solvay process is not used for the manufacture of potassium carbonate, because of the reason that potassium bicarbonate
Is prone to thermal decomposition
Has high water solubility and is unstable
Is soluble in ammonium chloride and potassium chloride solution
All (A), (B) and (C)
Which oil is preferred for paint manufacture?
Drying oil
Non-drying oil
Semi-drying oil
Saturated oil
__________ of rubber decreases after its vulcanisation.
Resistance to the action of organic solvent
Tackiness
Maximum service temperature
Tensile strength
Oxygen is separated by distillation from air after its liquefaction. The boiling point of oxygen is about __________ °C.
-83
-183
-196
-218
Good quality of edible salt is obtained from brine by the process of
Solar evaporation
Vacuum evaporation
Freeze drying
Electrolysis
One of the steps during refining of cane sugar consists of addition of hydrated lime to the sugar syrup followed by carbonation of the resulting solution. The purpose of this step is to
Adjust the pH of the syrup
Remove the coloring matter from the syrup
Reduce the viscosity of the syrup
Improve the rate of crystallisation of sugar
Cellulose content of bamboo and ideal fibrous raw material for the manufacture of paper is __________ percent.
10
50
80
95
Fatty material used in soap making is
Fatty acid
Fatty alcohols
Tallow
Detergents
Poly Vinyl Chloride (P.V.C.) is a __________ material.
Thermosetting
Thermoplastic
Fibrous
Chemically active
Potassium is kept & transported under
Water
Liquid ammonia
Kerosene oil
Alcohol
Fusion of limestone and __________ produces high alumina cement.
Sand
Bauxite
Quicklime
Calcite
Salt is the basic raw material for the manufacture of
Cement
Glass
Potteries
Caustic soda