Q. Which one of the following substances is not a mixture?
1) Ice
2) Ice-cream
3) Air
4) Honey
Q. Marsh Gas is -
1) Methane
2) Ethane
3) Propane
4) Butane
Q. The gases, responsible for the acid rain are -
1) SO2 and NO2
2) Ne and Argon
3) Ne and He
4) H2 and He
Q. Which of the process is known as nitrification?
1) Reaction of Nitrogen Monoxide with oxygen to form nitric acid
2) Reaction of nitrogen dioxide with water to form nitric acid
3) Conversion of ammonia to nitrites
4) Conversion of nitrite to nitric oxide
Q. The laughing gas is -
1) hydrogen peroxide
2) nitrous oxide
3) carbon monoxide
4) sulphur dioxide
Q. The atomic theory of matter was first proposed by -
1) John Dalton
2) Rutherford
3) J.J. Thomson
4) Niels Bohr
Q. Which one of the following minerals contains mostly silica?
1) Mica
2) Quartz
3) Olivine
4) Pyroxene
Q. Consider the following-
1. Fertilization
2. Waste water treatment
3. Bacteria
4. Chemical fertilizer
Which of the above adds Nitrogen oxide (a strong green house gas) on Earth?
1) 1 and 4
2) 2 and 3
3) 2, 3 and 4
4) 1, 2 3 and 4
Q. Teflon is the common name of -
1) Polytetrafluoro ethylene
2) Polyvinyl chloride
3) Polyvinyl fluoride
4) Dichlorodifluoro methane
Q. A homogeneous mixture contains two liquids. How are they separated?
1) By filtration
2) By evaporation
3) By distillation
4) By condensation
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