Parathion and Malathion are
Pesticides
Plasticisers for unsaturated polyesters
Pain-relieving drugs (analgesic)
Tranquilisers
Correct Answer :
A. Pesticides
Related Questions
In Kraft process of paper manufacture, white cooking liquor consists of caustic soda
Sodium sulphide & sodium carbonate
Sodium sulphite & sodium carbonate
Sodium sulphite & sodium sulphide
None of these
The enzyme which converts starch into the disaccharides maltose is
Diastase
Maltase
Yeast
None of these
Manufacture of phthalic anhydride uses __________ as a catalyst.
Ni
Cr
V2O5
Al2O3
Zeolite is a/an
Naturally occuring clay which is capable of exchanging cations
Abrasive material
Catalyst used in shift conversion
None of these
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
More than 100 percent of __________ is present in oleum.
SO3
H2SO4
H2SO3
SO2
Sulphuric acid is mainly used in the __________ industry.
Fertiliser
Steel
Paper
Paint
Platinum catalyst used in the earlier days of sulphuric acid manufacture by contact process suffers from the drawback like
High cost
Fragile nature
Easy poisoning tendency
All (A), (B) and (C)
Polyvinyl chloride (PVC) is
A thermosetting material
A condensation polymerisation product
Made by employing emulsion polymerisation
None of these
Washing soda is chemically represented by
Na2CO3
Na2CO3.H2O
Na2CO3.10H2O
NaHCO3
At very high concentration of enzymes, the rate of fermentation chemical reaction is __________ the concentration of reactants.
Independent of
Directly proportional to
Inversely proportional to
Proportional to the square of
The most stable allotropic form of phosphorous is the __________ phosphorous.
White
Black
Yellow
Red
Anion exchanger is regenerated usually with
NaOH
H2SO4
Hydrazine
Alum solution
Sea water contains about __________ ppm of bromine.
5
70
500
1700
Shrinkage volume in cement setting does not depend upon the
Sand to cement ratio
Water to cement ratio
Ambient temperature fluctuation
Drying period
Which one of the following is not likely to be a constituent of vegetable oils?
Citric acid
Oleic acid
Stearic acid
Glycerol
Salt cake is chemically represented by
Na2SO4
CaSO4. ½H2O
MgSO4
BaSO4
Sulphur addition in soap is done to
Improve the soap texture
Cure pimples & dandruff
Fasten lather formation
Increase its cleansing action
The purpose of tanning in leather industry is to
Stiffen the leather
Smoothen the leather
Make it flexible
Impart water resistance
Reaction of ethylene glycol and dimethyl terephthalate (DMT) produces
Nylon-6
Dacron
Polyester
PVC
Yellow phosphorus is transported under
Air
Water
Nitrogen
Helium
Pick out the wrong statement.
Cold rubber (SBR) is superior as compared to hot rubber (SBR)
Polymerisation temperature can modify the properties of SBR
Production of cold SBR employs lower pressure as compared to that of hot SBR
None of these
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
Silicon carbide is a/an
Adhesive
Abrasive
Type of glass
Brittle material
Polythene is a/an __________ polymerisation product.
Addition
Condensation
Thermosetting
None of these
Phthalic anhydride is produced by the oxidation of
Naphthalene
Benzene
Toluene
Aniline
Which glass is usually used in optical work?
Lead glass
High silica (borosilicate) glass
Photo-sensitive glass
Fibre glass
Salt is added in the kettle during soap manufacture to separate
Soap from lye
Glycerine from lye
The metallic soap
The unsaponified fat from soap
Potassium is kept & transported under
Water
Liquid ammonia
Kerosene oil
Alcohol
Exothermic neutralisation reaction between caustic soda and dodecylbenzene sulfonic acid produces sodium dodecylbenzene sulphate, which is a/an
Explosive
Soap
Detergent
Analgesic drug