1. At the top of a mountain a thermometer reads 7° C and a barometer reads 70 cm of Hg . At the bottom of the mountain these read 27° C and 76 cm of Hg respectively. Comparison of density of air at the top with that of bottom is
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A
Ideal gas equation, in terms of density 
constant ∴ ∴ 
∴ ∴ 
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