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A student forgot to add the reaction mix...

A student forgot to add the reaction mixture to the round bottomed flask at `27^@C` but put it on the flame.After a lapse of time, he realized his mistake. Using a pyrometer he found the temperature of the flask was`477^@C` fraction of air would have been expelled ?

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A student forgot to add the reaction mixture to the round bottomed flask at 27^(@)C but instead he/she placed the flask on the flame. After a lapse of time, he realised his mistake, and using a pyrometer he found the temperature of the flask was 477^(@)C . what fraction of air would have been expelled out?

In a 10 litre volumetric flask contains 1 gram He and 6.4 and gram O_2 at 27^@C temperature If that total pressure of the mixture is 1.107 atmosphere then what is the partial pressure of He and O_2 ?

An open vessel has a temperature of TK. When the vessel is heated at 477^(@)C , three fifths of air in the vessel escapes out. What fraction of air in the vessel would have been expelled out if the vessel were heated at 900 K (assume that volume of the vessel remains unchanged on heating)-

(i) For which property of the liquid the shape of a liquid drop is spherical? (ii) In a 10 volumetric flask contains 1 g He and 6.4 g of O_(2) at 27^(@)C temperature. If the total pressure of the mixture is 1.107 atm, then what is the partial pressure of He and O_(2) ?

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