921. Aldehyde and ketone have the same general formula for the homologous series_________________?
(A. CnH2nO2n)
(B. CnH2n)
(C. CnH2nO)
D. CnH2nOn+1
922. Ethanal is prepared industrially by air oxidation of ethylene using palladium chloride as a catalyst and _ as a promoter?
(A. PdCl2)
(B. Cu2Cl2)
(C. CuCl2)
D. PbCl2
923. An emulsifier is an agent which?
A. Aids the flocculation of an emulsion
B. Stabilises an emulsion
C. Accelerates the dispersion
D. Homogenizes an emulsion
924. Commercially sodium bicarbonate is known as?
A. Baking soda
B. Washing soda
C. Bleaching powder
D. Soda ash
925. Tip of the match-stick contains?
A. White phosphorous
B. Potassium chlorate
C. Red phosphorous
D. Phosphorous trichloride
926. Process of removing calcium and magnesium from hard water is known as?
A. Filtration
B. Sedimentation
C. Flocculation
D. Water softening
927. Major gaseous pollutant of the thermal power station is?
A. NO2
B. SO2
C. NH3
D. H2S
928. Ultraviolet radiation striking the earth is due to the depletion of?
A. Carbon dioxide
B. Carbon monoxide
C. Oxygen
D. Ozone
929. Photo oxidation process is initiated by?
A. Heat
B. Light
C. Oxygen
D. Catalyst
930. Alcohol prepared by the distillation of wood is?
A. Ethyl alcohol
B. Methyl alcohol
C. Propyl alcohol
D. Glycerol
Admin