Question

Choose the fast change from the following
1. Dissolving salt in cold water
2. Ripening of mango
3. Burning of paper
4. changing day and night ​

Answer 1

Fastest: Burning of paper

Slowest: Ripening of mango

Reasons:

When we burn a paper it burns very quickly but the slowest is ripeneing of mango as it take approximately 1 week for getting ripened.

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Answer 2

Answer:

1. Dissolving salt in cold water

Salt water is salt mixed with fresh water. However, salt in cold water does not dissolve as well as if the water is warm. Warm water has more room between the water molecules, allowing more salt to fit. Cool water molecules are tighter together and will not allow much salt to dissolve.