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The orbital angular momentum of an electron in 2s -orbital is:
(1) 1/2 h/ 2Π
(2) h/ 2Π
(3) √2 h/ 2 Π
(4) Zero
Ans: Zero
Compare the combustion energy stored in a 1 litre bottle of propane and butane. Suppose that the product temperature is 100°C. The density of liquid propane is 0.493 g cm -3
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