Pick out the wrong statement.
Low intensity explosives are also called propellants, whereas high intensity explosive are called detonators
Gun powder comprises of 75% salt petre, 15% charcoal and 10% sulphur
Lead azide is a popular military explosive
TNT is a hygroscopic explosive having very high melting point and is non-toxic to human being
Correct Answer :
D. TNT is a hygroscopic explosive having very high melting point and is non-toxic to human being
Related Questions
Carboxymethyl cellulose (CMC) is added in detergents to act as a/an
Surfactant
Builder
Optical brightening agent
Anti soil redeposition agent
Which of the following processes can remove both temporary as well as permanent hardness of water?
Filtration
Boiling
Distillation
None of these
Raw material used in alcohol distilleries in India is
Molasses
Benzol
Methylated spirit
None of these
Presence of carbonaceous matter in the sewage
Causes reduction in its dissolved oxygen content thereby endangering the life of aquatic creatures
Reduces sulphate ions to sulphides causing obnoxious smell
Increases the quantity of chlorine used for its purification
All (A), (B) and (C)
A unit operation is exemplified by the process of
Reduction
Desorption
Nitration
Combustion
The most popular and common detergent i.e., alkyl benzene sulfonate (ABS) is a/an __________ detergent.
Cationic
Anionic
Amphoteric
Semi polar
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
Fatty material used in soap making is
Fatty acid
Fatty alcohols
Tallow
Detergents
Fusion of bauxite and __________ produces high alumina cement.
Alum
Limestone
Coke
Quartz
In contact process, SO3 is absorbed in 97% H2SO4 and not in water, because
SO3 gas is sparingly soluble in water
Water forms an acid mist, which is difficult to absorb
The purity of acid is affected
Scale formation in the absorber is to be avoided
Phenol formaldehyde
Employs addition polymerisation
Employs condensation polymerisation
Is a monomer
Is an abrasive material
BHC (Benzene hexachloride) is made by the chlorination of benzene
Which is an addition reaction
Which is a substitution reaction
In absolute dark
In presence of sunlight
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)
Pasteurisation of milk means
Removal of fatty and albuminous substance from it
Killing of organisms present in it by heating it at controlled temperature without changing its natural characteristics
Inhibiting the growth of micro-organisms without killing them
None of these
Black liquor is converted into white liquor by
Evaporation and burning the concentrate followed by causticisation of products
Multi-effect evaporation only
Selective liquid extraction
Extractive distillation
Metallic soap is __________ salt of fatty acids.
Sodium
Potassium
Both sodium & potassium
Aluminium or calcium
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
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)
Sucrose content in cane sugar may be around __________ percent.
50
70
95
80
Bio-degradable detergents
Can be readily oxidised
Pose problem in sewerage plant
Have an isoparaffinic structure
Should not be used as it spoils the cloth
A substance produced by a living organism and capable of anti-microbial activity is called a/an
Antibiotic
Antiseptic
Disinfectant
None of these
Oxygen is separated by distillation from air after its liquefaction. The boiling point of oxygen is about __________ °C.
-83
-183
-196
-218
Chloramines are used in water treatment for
Disinfection and control of taste & odour
Corrosion control
Removing turbidity
Control of bacteria
The most widely used coagulant for removing suspended impurities from water is
Bleaching powder
Chlorine
Calcium sulphate
Alum
Neon gas is
Flammable in nature
Used in color discharge tube
Filled in lamps having tungsten filament
All (A), (B) and (C)
Pick out the false statement pertaining to water treatment.
Aeration of water is effective in CO2 removal
The zeolite water softening process reduces the hardness of water by not more than 50%
Sodium sulphate or sodium carbonate do not cause hardness in water
Water with pH value less than 7, is acidic
Dacron is a
Condensation product of Hexamethylene diamine and adipic acid
Thermosetting material
Condensation product of dimethyl terephthalate and ethylene glycol
None of these
The catalyst used in the manufacture of DDT is
Alumina
Silica
20% oleum
Aluminium chloride
Removal of dirt/soil by soaps or detergent does not involve the __________ of soil.
Emulsification
Dispersion
Precipitation
Wetting
Sucrose is a
Monosaccharide
Disaccharide
Polysaccharide
None of these