Chemical formula of BHC, which is an insecticide is
C6H6Cl6
C6Cl6
C6H5Cl
C6H4Cl2
Correct Answer :
B. C6Cl6
Related Questions
Which of the following is a detergent?
Benzene hexachloride
Alkyl benzene sulphonate
Polytetrafluoroethylene
Cellulose nitrate
Which of the following is not responsible for causing permanent hardness of water?
Ca(HCO3)2
CaCl2
MgCl2
None of these
Most widely and commonly used coagulant for the removal of suspended impurities in water is
Bleaching powder
Slaked lime
Alum
Copper sulphate
Sodium chloride content in sea water is about __________ gms/litre.
2
10
25
50
Main constituents of natural rubber is
Polystyrene
Polyisoprene
Polybutadiene
Polychlorophrene
Anion exchanger is regenerated usually with
NaOH
H2SO4
Hydrazine
Alum solution
Vegetable oils contain large quantity of glycerides of unsaturated acids. When the vegetable oils contain high amount of saturated fatty acids, it is termed as __________ oil.
Drying
Semi-drying
Non-drying
None of these
Prussian blue is chemically represented by
FeO.TiO2
Ca SO4 . 2H2O
Fe4 [Fe (CN6)3]
AlF3 . 3NaF
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
Pitch (a product of coal tar distillation) is always mixed with creosote oil, when it is to be burnt in a burner, because
Its calorific value is very less
Tar neutralises the residual acids present in pitch
It reduces viscosity and imparts fluidity for its transportation through pipelines at economic pressure drop
All (A), (B) and (C)
Low purity oxygen is used for
L.D. steel making
Cutting and welding of metals
Medicinal purposes
Chemical oxidation processes
Which of the following has sodium bicarbonate as its main constituent?
Baking soda
Baking powder
Washing soda
None of these
Highly porous refractory bricks are
Less susceptible to chemical attack by molten fluxes and gases etc
Very strong
Having very high thermal conductivity
None of these
Neon gas is
Flammable in nature
Used in color discharge tube
Filled in lamps having tungsten filament
All (A), (B) and (C)
The basic constituent of vegetable oils is
Triglyceride
Fatty acids
Fatty alcohol
Mono esters
CaCl(OCl) is the chemical formula of
Hypo
Bleaching powder
Plaster of Paris
Aqua regia
Laboratory glass wares which reacts with hydrofluoric acid, are made of the __________ glass.
Lead
Borosilicate
Soda lime
Alkali silicate
Basic oxide is absent in __________ glass.
Flint
Pyrex
Quartz
All (A), (B) & (C)
Salt cake is chemically represented by
Na2SO4
CaSO4. ½H2O
MgSO4
BaSO4
Starting raw material for the manufacture of alum is
Alumina
Gypsum
Bauxite
Ammonium bicarbonate
Digestion of wood-base materials (for manufacture of pulp) is done to
Remove lignin
Produce long fibres
Prevent deterioration on storage
None of these
__________ glass has the lowest co-efficient of thermal expansion and hence is more heat resistant.
Pyrex
Soda lime
Lead
High silica
In the production of soda ash by Solvay process, the by-product is
CaCl2
NH4Cl
NH3
NaOH
Enzymes are
Proteins with high molecular weight (around 10,000)
Derived from living organisms
Catalyst for temperature sensitive reactions
All (A), (B) and (C)
Vulcanisation of rubber
Decreases its tensile strength
Increases its ozone & oxygen reactivity
Increases its oil & solvent resistance
Converts its plasticity into elasticity
Pick out the wrong statement.
Kraft method of pulp manufacture can process all types of fibrous raw materials
Digestion time for bagasse is less than that for wood base materials
Both temperature and pressure in the digestor is less in case of the sulphite method as compared to that in the sulphate method
None of these
Which of the following is a disaccharide?
Sucrose
Glucose
Starch
Maltose
Molecular weights of polymers are in the range of
102 - 102
105 - 109
102 - 107
109 - 1011
Calcination of gypsum produces
Plaster of Paris
Salt cake
Nitre cake
Lime
Glauber's salt is chemically
Calcium sulphate
Potassium sulphate
Potassium chlorate
None of these