Following are the steps involved in the experiment 'to determine the percentage of water absorbed by raisins'. They are not in proper sequence. I. Soak the raisins in fresh water. II. Weigh dry raisins. III. Weigh soaked raisins. IV. Wipe out soaked raisins. The correct sequence of steps is

To perform the experiment systematically:

1. First, we must weigh the dry raisins to get the initial mass ($W_1$). This corresponds to step II.
2. Next, we place these dry raisins in a beaker containing fresh water and leave them to soak for a few hours to allow endosmosis to occur. This corresponds to step I.
3. After soaking, we remove the raisins from the water and gently wipe them with a dry filter paper or blotting paper to remove any adhering surface water. This corresponds to step IV.
4. Finally, we weigh the wiped, swollen raisins to get the final mass ($W_2$). This corresponds to step III.

Thus, the correct sequence is II $\rightarrow$ I $\rightarrow$ IV $\rightarrow$ III, which is Option B.

• Option A (I, II, III, IV) is incorrect because we cannot soak before weighing the dry raisins, and wiping is done before the final weighing.
• Option C (II, I, III, IV) is incorrect because weighing is done after wiping, not before.
• Option D (I, II, IV, III) is incorrect because soaking is done after weighing the dry raisins.