set 1 MCQ Questions & Answers Detailed Explanation
MOST IMPORTANT general science mcq - 3 EXERCISES
The following question based on environmental chemistry topic of general science mcq
- It inactivates / kills the harmful micro-organisms in water.
- It removes all the undesirable odours from the water.
- It quickens the sedimentation of solid particles and improves the clarity of water.
(a) 2 and 3 only
(b) 1 only
(c) 1 and 3 only
(d) 1, 2 and 3
The correct answers to the above question in:
Answer: (b)
It inactivates/kills the harmful micro-organisms in water.
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Read more environmental chemistry Based General Science Questions and Answers
Question : 1
Presence of which of the following fuel gas in the exhaust fumes shows incomplete combustion of fuel?
a) Carbon monoxide and water vapour
b) Sulphur dioxide
c) Carbon monoxide
d) Nitrogen dioxide
Answer »Answer: (c)
Presence of CO in the exhaust fumes shows incomplete combustion.
Question : 2
Which one of the following is used as a mordant in dyeing and tanning industry?
a) Magnesium chloride
b) Magnesium carbonate
c) Magnesium oxide
d) Magnesium sulphate
Answer »Answer: (c)
Question : 3
Chipko movement is concerned with –
a) plant breeding
b) project tiger
c) plant conservation
d) animal breeding
Answer »Answer: (c)
Question : 4
Which one of the following polymeric materials is used for making bullet proof jacket?
a) Kevlar
b) Rayon
c) Nylon-6, 6
d) Dacron
Answer »Answer: (a)
Question : 5
Which of the following statements about polar stratosphere clouds (PSCs) is not correct?
a) Type I clouds are formed at about –77ºC and contain solid HNO3 . 3H2O
b) Type II clouds are formed at about –85ºC and contain some ice
c) PSCs do not react with chlorine nitrate and HCl
d) A tight whirlpool of wind called Polar Vortex is formed which surrounds Antarctica
Answer »Answer: (c)
PSCs react with chlorine nitrate and HCl to give HOCl and Cl2 .
Question : 6
What is the composition of nitrolim – a chemical fertilizer?
a) Calcium carbide and carbon
b) Calcium carbide and nitrogen
c) Nitrogen and limestone
d) None of the above
Answer »Answer: (d)
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