Q. Which of the following is caused by the higher concentration of Nitrogen and Phosphorous?
1) Eutrophication
2) Hardness
3) Alkalinity
4) Acidity
Q. An element that does not occur in nature but can be produced artificially is
1) Thorium
2) Radium
3) Plutonium
4) Uranium
Q. The acid used in car battery is
1) Hydrochloric acid
2) Nitric acid
3) Sulphuric acid
4) Carbonic acid
Q. Water that does not make foam quickly with soap is
1) Soft Water
2) Natural Water
3) Mineral Water
4) Hard Water
Q. The Polymer obtained by the condensation of hexamethylene diamine and adipic acid is:
1) Terylene
2) Tolleri's
3) Bakelite
4) Nylone
Q. Crude oil is sometimes termed sweet because it is:
1) mildly sweet due to low sulphur content
2) less acidic
3) less alkaline
4) sweet in taste due to dissolved sugars
Q. Which of the following is an ore of aluminium?
1) Haematite
2) Dolomite
3) Bauxite
4) Caralite
Q. Which one of the following gases is used for the purification of drinking water ?
1) Sulphur dioxide
2) Chlorine
3) Fluorine
4) Carbon dioxide
Q. Water is boiling in a flask over a burner. To reduce its boiling temperature one must -
1) Reduce the surrounding temperature
2) Connect the mouth of the flask to an evacuating system
3) Supply heat from a less intense source
4) Connect the mouth of the flask to a compressure
Q. One of the breakthrough of Acharya P.C.Roy was to synthesize the following compound -
1) HgCl2
2) HgO
3) Hg2Cl2
4) NH2NO4
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