Which of the following changes decrease the vapour pressure of water kept in a sealed vessel?

(i) Decreasing the quantity of water

(ii) Adding salt to water

(iii) Decreasing the volume of the vessel to one-half

(iv) Decreasing the temperature of water 

<p><span data-teams="true">This is a multiple choice answer as classified in NCERT Exemplar</span></p><p>Option (ii). Adding salt to water and</p><p> (iv). Decreasing the temperature of water</p><p>By adding salt to water, &nbsp; the water molecule available at the surface to evaporate will be low and hence, the vapour pressure decreases. Also vapour pressure is directly proportional to temperature so when we decrease the temperature of water the vapour pressure decreases.&nbsp;</p>

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