A. Are absorbed throughout the plant
B. Kill insects following external bodily contact
C. Are stomach poisons
D. Emit poisonous vapour
Systemic insecticides________________? Read More »
Chemical Process A. Sodium thiosulphate
B. Ethyl magnesium chloride
C. Sodium sulphite
D. Sodium bicarbonate
Chemical name of Grignard reagent is__________________? Read More »
Chemical Process A. Naphthalene
B. Benzene
C. Toluene
D. Aniline
Phthalic anhydride is produced by the oxidation of _________________? Read More »
Chemical Process A. 0.1 to 0.5
B. 1 to 5
C. 5 to 10
D. 15 to 25
A. Laminates
B. Card boxes
C. Furniture
D. Books
Phenol formaldehyde resin is used as an adhesive in making__________________? Read More »
Chemical Process A. It is very corrosive at elevated temperature
B. Its viscosity is not reduced on further heating (hence pressure drop on pumg it, cannot be
further reduced)
C. It decomposes on further increasing the temperature
D. None of these
A. Butyl alcohol
B. Propyl alcohol
C. Ethanol
D. Methyl alcohol
In industrial nomenclature, alcohol means_________________? Read More »
Chemical Process A. Sulphur
B. Charcoal
C. Potassium nitrate
D. All A , B, & C.
Gun powder uses_____________________? Read More »
Chemical Process A. Phosphate rock with phosphoric acid
B. Phosphate rock with sulphuric acid
C. Phosphate rock with nitric acid
D. Ammonium phosphate with phosphoric acid
Triple superphosphate is manufactured by reacting ____________________? Read More »
Chemical Process A. 15
B. 35
C. 55
D. 70
Average sulphur content in Indian pyrites is about _________________ percent? Read More »
Chemical Process