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Question 1
Age fossil may be found out by determining the ratio of two isotopes of carbon. The isotopes are
Question 2
Which of the following represents a relation for 'heat lost = heat gained?
Question 3
Photochemical smog is also known as
Question 4
Which one of the following elements does not form solid hydrogen carbonate?
Question 5
Excessive use of which of the following fertilizers may be responsible for the presence of a toxic substance in groundwater?
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Sep 12CDS & Defence
