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Q. A fresh egg sinks in pure water but floats in salty water. This is because
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Q. How does common salt help in separating soap from the solution after saponification?
Q. Which among the given is used to increase the anti-knocking property of petrol
Q. What happens during seed germination?
Q. For transfusion, the O blood group of a Donor can be accepted by a person having blood group
Q. Ozone saves the biosphere by absorbing high energy radiations called _____.
Q. The percentage of oxygen in air is approx.
Q. Permanent hardness of water may be removed by the addition of:
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