Alum is used by dyers of cloth:
A. As water purifier
B. As mordant
C. fire proofing fabrics
D. Softening of hard water
The most useful dye for those fabric which can form hydrogen bonds is:
A. Mordent dye
B. Vat dye
C. Acid dye
D. Direct dye
Which of the following pair is not distinguished by passing H2S?
A. Hg, Pb
B. Zn, Mn
C. As, CD
D. Cd , Pb
Ozone is formed in the upper layer of the atmosphere from oxygen by action of:
A. Free radicals
B. Cosmic rays
C. Nitrogen oxides
D. UV -rays
Surface water contains:
A. only salt
B. Organic matter
C. Salt & Organic matter
D. Suspended impurity
Cyclone collector is used for minimizing:
A. Water pollution
B. Sound pollution
C. Soil pollution
D. Air pollution
The medium which interact with long lived pollutant is:
A. Source
B. Receptor
C. Sink
D. All of them
Which one of the following gives the measure of Organic pollution in water?
A. COD
B. DO
C. PH
D. Salinity
The distribution coefficient is related to:
A. Separating factors
B. decreasing factors
C. Colouring factors
D. retardation factors
The usual property of ionic crystal are:
A. Stable
B. gaseous form
C. Unstable
D. Compound forming
