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Question:

In the experiment for determining the percentage of water absorbed by raisins, we do the final weighing of the raisins after keeping them dipped in water for about one hour. For the accuracy of the result, the extra water from the surface of the soaked raisins is removed by:

hot air blower

filter paper

dry cotton wool

rubbing with cotton cloth

Solution:

Before weighing the soaked raisins, these should be dried gently with the help of filter paper to remove excess of water.