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Question 1
One Standard Atmosphere is the pressure which is equal to that exerted by a _______ mm column of mercury at 0°C.
Question 2
Name the property of water which helps it to stick to certain surfaces
Question 3
Name a metal that can be cut with a knife.
Question 4
In an area, the population of birds decreased significantly due to the excessive use of DDT. What is the cause of this decline?
Question 5
Which one of the following is the largest composition in biogas?
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