CPCB Scientist B Paper | Central Pollution Control Board Scientist B Old Paper for Chemistry

(Every Correct answer 1 mark, every wrong answer – 0.25 mark as a negative marking)

In which year UN Conference on Environment at Stockholm (Sweden) was held?
(a) 1982
(b) 1986
(c) 1970
(d) 1972

Which of the following is/are secondary polluant(s)?
(a) Sulphur dioxide
(b) Hydrocarbons
(c) Peroxyacetyl nitrate
(d) All of these

The degradation of environmental pollutants by living microorganisms is known as
(a) Nanoremediation
(b) Chemremediation
(c) Bioremediation
(d) None of these

Which is the major sink for the atmospheric CO2?
(a) Oceans
(b) Rivers
(c) Land
(d) None of these

When is the ‘World Environment Day’ celebrated every year?
(a) July 11
(b) September 5
(c) December 11
(d) June 5

The total dissolved solids (TDS) can be reduced by the following method
(a) Distillation
(b) Reverse osmosis
(c) Ion exchange
(d) All of the above

Which of the following salt is responsible for temporary hardness of water?
(a) Magnesium carbonate
(b) Magnesium sulphate
(c) Calcium Sulphate
(d) Calcium chloride

N2 and O2 are main constituents of air but these do not react with each other to form oxides of nitrogen. Find the possible reason.
(a) The reaction is endothermic and requires very high temperature
(b) The reaction can be initiated only in presence of a catalyst
(c) Oxides of nitrogen are unstable
(d) N2 and O2 are unreactive

Photochemical smog occurs in warm, dry and sunny climate. Which of the following is not amongst the components of photochemical smog?
(a) NO2
(b) O3
(c) SO2
(d) Unsaturated hydrocarbon

What is the pH of acid rain?
(a) More than 5.6
(b) Less than 5.6
(c) About 10.0
(d) Near 7.0

GC is a promising technique in environmental analysis. What type of analysis it allows?
(a) Only qualitative
(b) Only quantitative
(c) Both qualitative & quantitative
(d) None of these

Which of the following cannot be used as adsorbent in Column adsorption chromatography?
(a) Magnesium oxide
(b) Silica gel
(c) Alumina
(d) Potassium permaganate

In sea water, what is the ideal Redfield ratio is maintained at any depth?
(a) 1 : 1
(b) 16 : 1
(c) 32 : 1
(d) 64 : 1

In which year, the Environmental (Protection) Act was enacted?
(a) 1972
(b) 1986
(c) 1989
(d) 1974

In which year, noise pollution has been inserted as Pollution in the Air Act?
(a) 1981
(b) 1987
(c) 1982
(d) 2000

You can also refer the following papers –

CPCB Scientist B Chemistry Model Paper

CPCB Scientist B Chemistry Sample Question Paper