The tolerable level of sound is _____________

(a)

140 db

(b)

120 db

(c)

100 db

(d)

2220 db

Which one of the following expanded forms of the following acronyms is correct?

(a)

UNEP	United Nations Environmental Policy

 

(b)

EPA	Environmental Pollution Agency

 

(c)

IUCN	International Union for Conservation of Nature and Natural Resources

 

(d)

IPCC	International Penal for climate Change

 

Increase in the concentration of the toxicant at successive trophic levels is known as

(a)

Biodeterioration

(b)

Biotransformation

(c)

Biogeochemical cycling

(d)

Biomagnifications

A lake which is rich in organic waste may result in

(a)

Drying of the lake due to algal bloom

(b)

Increased population of fish due to lots of nutrients

(c)

Mortality of fish due to lack of oxygen

(d)

Increases population of aquatic organisms due to minerals

Which is not a physical method of waste water treatment.
(i) Floatation
(ii) Filtration
(iii) Phydro remediation
(iv) Oxidation

(a)

i and iii

(b)

ii and iv

(c)

i and ii

(d)

iii and iv