Pick out the wrong statement.
High early strength cement are made from materials having high silica to lime ratio
The function of gypsum in cement is to enhance its initial setting rate
Acid resistant cements are known as silicate cement
Major component of greyish Portland cement is tricalcium silicate
Correct Answer :
A. High early strength cement are made from materials having high silica to lime ratio
Related Questions
DDT stands for
Diethyl-diphenyl-trichloromethane
Dichloro-diphenyl-trichloromethane
diphenyl-dichloro-trichloromethane
Dichloro-diphenyl-trichloroethane
The catalyst used in the manufacture of DDT is
Alumina
Silica
20% oleum
Aluminium chloride
Refractory bricks having high thermal conductivity is desirable, when it is to be used in the
L.D. converter
Blast furnace
Rotary kiln
Recuperator
Which is the main reducing agent during production of iron from iron ore in a blast furnace?
C
CO
CO2
H2
The ideal pulp for the manufacture of paper should have high __________ content.
Cellulose
Lignin
Both (A) & (B)
None of these
Soaps remove dirt by
Increasing the surface tension
Decreasing wettability
Supplying hydrophilic group
None of these
Industrial production of chloroform requires acetone and
Phosgene
Calcium hypochlorite
Chlorine
Ammonium chloride
Vulcanisation of rubber
Decreases its tensile strength
Increases its ozone & oxygen reactivity
Increases its oil & solvent resistance
Converts its plasticity into elasticity
Which of the following is the main constituent of the mother liquor produced in salt industry?
Quick lime
Glauber's salt
Salt petre
Bromine
Cellulose content of bamboo and ideal fibrous raw material for the manufacture of paper is __________ percent.
10
50
80
95
Fat splitting catalyst is
CaCO3
ZnO
Al2O3
Fe
Nylon-6 is a
Polyamide
Thermosetting resin
Polyester
None of these
Titanium dioxide is a/an __________ colour pigment.
White
Black
Yellow
Blue
Celluloid is chemically
Cellulose acetate
Regenerated cellulose
Cellulose nitrate
Cellulose acetate butyrate
Phosphoric acid is prepared from
Cryolite
Chalcopyrite
Rock phosphate
None of these
Mercury electrolytic cells are preferred over diaphragm electrolytic cell (for production of caustic soda), as it
Has larger production capacity per unit cell
Consumes less power per ton of Cl2 produced
Produces high purity (70%) caustic soda directly
All (A), (B) and (C)
Pick out the wrong statement pertaining to the properties of glasses. Glasses generally have
High electrical insulation properties
Sharp melting points
Low co-efficient of thermal expansion
Compressive strength much greater than their tensile strengths
Sulphur removal by heating of pyrite ore in presence of air is called its
Reduction
Roasting
Calcination
Smelting
Detergent is produced by the sulphonation of dodecyl benzene, which is an __________ reaction.
Endothermic
Exothermic
Irreversible
Both (B) and (C)
Type of glass used in optical work is the __________ glass.
Soda-lime
Fibre
Lead
Borosilicate
__________ is not a constituent of gun powder.
Carbon
Charcoal
Sulphur
Potassium nitrate
Fusel oil is a/an
Essential oil
Extract from medicinal herbs
Mixture of higher molecular weight alcohols (a by-product obtained during production of alcohol from molasses).
None of these
P.T.F.E. (Poly tetra fluoro ethylene) is commercially known as
Bakelite
Neoprene
Teflon
Nylon-66
Chemical name of aspirin (an analgesic drug) is
Acetylsalicylic acid
Nictonic acid
Calcium acetate
Methyl salicylate
Sizing material is incorporated in paper to
Impart resistance to penetration by liquids
Increase its thickness
Increase its flexibility & opacity
Increase its brightness
Penicillin, an antibiotic drug was discovered by
Alexander
Flaming
Doctor Zhivago
None of these
Thorium is mainly used
For the manufacture of gas mantles
As a fissile fuel in a nuclear reactor
In the manufacture of hydrogen bomb
In the treatment of cancer
Chemical name of soda ash is
Sodium bicarbonate
Sodium thiosulphate
Potassium carbonate
None of these
Portland cement consists mainly of
CaO & SiO2
SiO2 & Al2O3
CaO & Al2O3
CaO & Fe2O3
Which of the following is used as a coagulant in water treatment?
Chloramine
Chlorine
Ferrous sulphate
Hydrogen peroxide