Month: February 2019

A. Same as Dacron
B. A polyester
C. Both A. & B.
D. Neither A. nor B.

A. Polyvinyl chloride (PVC)
B. Polybutadiene
C. Phenol formaldehyde
D. Polyurethane

A. Crystallisation
B. Vacuum crystallisation
C. Atmospheric distillation
D. Dehydration

A. Quick lime
B. Glauber’s salt
C. Salt petre
D. Bromine

A. Ground-wood
B. Board
C. Tissue
D. Wrapg

A. C + H2O = CO + H2
B. CaC2 + H2O = Ca(OH)2 + C2H2
C. MgCO3 = MgO + CO2
D. All (A), B. and (C)

A. Ethylene dichloride
B. Chlorobenzene
C. Carbon tetrachloride
D. Chlorinated paraffin

A. Carbonates
B. Bicarbonates
C. Phosphates
D. Sulphates

A. A black, sticky & viscous liquid
B. Used in the manufacture of greases, emulsions & soaps
C. Composed mainly of rosin & fatty acids
D. All A , B. & C.

A. About 90% of nitric acid is manufactured by Ostwald’s process
B. It is a strong mono basic acid which reacts with almost all the metals except noble metals
C. Yellow color of impure nitric acid is because of dissolved oxides of nitrogen (mainly NO2)
D. Arc process of nitric acid manufacture is economical as compared to Ostwald’s process