CaSO4 . ½H2O is known as
Blue vitriol
Plaster of Paris
Gypsum
Zeolite
Correct Answer :
B. Plaster of Paris
Related Questions
Percentage of glycerine present in the spent lye obtained during soap manufacture is about
0.5
5
20
35
Which of the following is not a product of coal tar distillation?
Anthracene
Creosote oil
Carbolic oil
None of these
Which of the following has sodium bicarbonate as its main constituent?
Baking soda
Baking powder
Washing soda
None of these
Styrene butadiene rubber (SBR) is
A natural rubber
A synthetic polymer
A synthetic monomer
Another name of silicone rubber
Molecular weight of plastics ranges from
5000 to 10000
20000 to 250000
500 to 5000
106 to 109
Refractory bricks burnt at very high temperature have got
Greater resistance to corrosion by slags
Less resistance to corrosion by slags
High spalling tendency
None of these
Type of glass used in optical work is the __________ glass.
Soda-lime
Fibre
Lead
Borosilicate
Conversion of CO to CO2 by steam in presence of a catalyst is called
Steam reforming
Shift conversion
Steam gasification
None of these
Catalyst used during the manufacture of 'Vanaspati Ghee' is
Zinc
Nickel
Platinum
Copper
Rancidity of the fatty oil can be reduced by its
Decoloration
Hydrogenation
Oxidation
Purification
Bakelite is
Same as Polytetrafluoroethylene (PTFE)
An inorganic polymer
Same as thermosetting phenol-formaldehyde
Not a polymer
The drug used in contraceptives is
Sulfadiazine
Mestranol
Methyl salicylate
Penicillin
Pick out the wrong statement.
Dry process is used for the manufacture of cement, when the raw material is blast furnace slag
Portland cement is made employing wet process
Gypsum is added to Portland cement to lengthen its setting time
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)
Which of the following is a disaccharide?
Sucrose
Glucose
Starch
Maltose
Transparent soaps (e.g. Pears) are
Usually soft soap (made from coconut oil) in which cane sugar & alcohol are added and finally washed with methylated spirit to achieve transparency
Metallic soaps with frothing agent and free Stearic acid to achieve transparency
Metallic soaps with frothing agent from which glycerine has not been recovered
None of these
CaO is called
Quick lime
Slaked lime
Limestone
Calcite
Production of one ton of cement requires about __________ tons of limestone.
0.6
1.2
2.2
3.8
Fermentation of molasses to produce ethyl alcohol is done at __________ °C.
20 - 30
< - 5
100 - 150
250 - 300
High purity nitrogen is used in
Making protective gas (95% N2 + 5% H2) for annealing of cold rolled steel strip coils
Fire fighting purposes
Both (A) & (B)
Neither (A) nor (B)
Reaction of calcium carbide with water produces a gas, which is used
As an illuminant
For metal cutting/welding
Both (A) & (B)
Neither (A) nor (B)
Thermoplastic materials
Do not soften on application of heat
Are heavily branched molecules
Are solvent insoluble
None of these
Deacon's method is used for the manufacture of
Glauber's salt
Common salt
Chlorine
Graphite electrode
Dacron is a/an
Polyester
Unsaturated polyester
Polyamide
Inorganic polymer
Main product in calcium carbide-water reaction is
Ca(OH)2
C2H2
CO2
CaCO3
Fire clay is __________ refractory material.
A basic
An acidic
A neutral
Not a
Drinking (potable) water treatment does not involve
Coagulation
Sedimentation
Softening
Disinfection
Fatty material used in soap making is
Fatty acid
Fatty alcohols
Tallow
Detergents
Nylon-6 as compared to Nylon-66 is having higher
Hardness
Abrasion/resistance
Melting point
None of these
Chemical formula of 'salt cake' is
Na2SO4
CaSO4
MgSO4
BaSO4