Boiling of water containing temporary hardness produces
CO2
CaSO4
CaHCO3
None of these
Correct Answer :
A. CO2
Related Questions
Isopropyl benzene produced by alkylation of benzene with propylene is known as
Neoprene
Cumene
Gelatin
Mercaptans
Chemical name of Grignard reagent is
Sodium thiosulphate
Ethyl magnesium chloride
Sodium sulphite
Sodium bicarbonate
Zeolite is used in the
Water treatment
Glass manufacture
Hydrogenation of fatty oil as a catalyst
Development of exposed photographic plate
Pick out the wrong statement.
Wine, rum & Vodka are prepared by the formulation of fruit juice, sugar beet & rye respectively
Protein catalysts are called enzymes
The rate of chemical reaction is independent of the concentration of reactants at high concentration of enzymes
Total sugar content in molasses is about 10%
__________ is used as a flux in the smelting of copper ore like chalcopyrite.
Coke breeze
Lime powder
Silica/quartz
Dolomite
Chemical formula of BHC, which is an insecticide is
C6H6Cl6
C6Cl6
C6H5Cl
C6H4Cl2
Hydrophilic group of a soap or detergent solution is
Water hating
Soil loving
Water loving
None of these
Major component of flint glass is
Lead oxide
Silica
Alumina
Soda
Very dilute solutions are generally used in fermentation reactions for which the optimum temperature range is __________ °C.
-5 to 0
5 to 10
30 to 50
75 to 80
Polyvinyl chloride (PVC) is
A thermosetting material
A condensation polymerisation product
Made by employing emulsion polymerisation
None of these
The yield of tar from high temperature carbonisation of dry coal is about __________ percent.
3
12
22
0.3
Fire clay is __________ refractory material.
A basic
An acidic
A neutral
Not a
Magnesium and calcium __________ cause temporary hardness of water.
Carbonates
Bicarbonates
Phosphates
Sulphates
Which of the following is an yellow pigment?
Titanium dioxide
Ferrous sulphate
Lead chromates
Zinc sulphides
Which of the following may be viewed as a catalyst in the manufacture of soda ash by Solvay process?
NH3
NaCl
CaO
Coke
Flexible foam (for mattresses) is usually made of
PVC
Silicone
Polyurethanes
Polyamides
Acetone is produced by catalytic dehydrogenation of
Phenol
Naphthalene
Isopropanol
Ethyl benzene
Bromine content in sea water may be around __________ ppm.
70
640
1875
2500
Calcination of gypsum produces
Plaster of Paris
Salt cake
Nitre cake
Lime
Rotary kiln is not involved in the production of
Cement
Lime from limestone
Slaked lime from quick lime
None of these
Sulphuric acid completely saturated with sulphur trioxide is called
Concentrated sulphuric acid
Oleum
Sulphurous acid
Dilute sulphuric acid
Chemical formula of oleum is
H2SO3
H2SO4
H2S2O7
H2SO7
Which of the following is not produced on commercial scale from sea water?
Bromine
Magnesium compounds
Potassium compounds
Sodium sulphate
Which catalyst is used in the manufacture of ethylene oxide by oxidation of ethylene?
AgO
Al2O3
ZnCl2
Fe2O3
P.T.F.E. (Poly tetra fluoro ethylene) is commercially known as
Bakelite
Neoprene
Teflon
Nylon-66
Economics of 'Solvay Process' depends upon the efficiency of
Carbonating tower
Ammonia recovery
Ammonia recovery and size of the plant
Ammoniation of salt solution
Phenol is mainly used
To produce benzene
To produce phenol formaldehyde
To produce polyester resin
As a plasticiser for unsaturated polyester
__________ is the major constituent of the Portland cement.
Calcium carbonate
Calcium oxide
Tricalcium silicate
Calcium sulphate
Transportation of 35% oleum during winter suffers from the problem of freezing, which can be overcome by the addition of small quantity of
Nitric acid
Hydrochloric acid
Methyl alcohol
Formic acid
Fats as compared to oils have
More unsaturated glycerides of fatty acids
Less unsaturated glycerides of fatty acids
Much higher reactivity to oxygen
Lower melting point