Q9 of 28 Page 7

Which condition out of the following will increase the evaporation of water?

On increasing the temperature of water, the kinetic energy of the particles increases. Due to this, the particles overcome their forces of attraction and are able to move freely. Hence, results in the increase of evaporation of water.

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7

Choose the correct statement of the following:

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The boiling points of diethyl ether, acetone and n-butyl alcohol are 35°C, 56°C and 118°C respectively. Which one of the following correctly represents their boiling points in Kelvin scale?

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In which of the following conditions, the distance between the molecules of hydrogen gas would increase?

(i) Increasing pressure on hydrogen contained in a closed container


(ii) Some hydrogen gas leaking out of the container


(iii) Increasing the volume of the container of hydrogen gas


(iv) Adding more hydrogen gas to the container without increasing the volume of the container

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A sample of water under study was found to boil at 102°C at normal temperature and pressure. Is the water pure? Will this water freeze at 0°C? Comment.