Which of the following option cannot be used to identify the change when some sugar is dissolved in water?

Change in taste

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Change in smell

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Change in colour

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Change in temperature

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Solution

The correct options are
B Change in smell
C Change in colour
D Change in temperature
When some sugar is added to water, it gets dissolved and vanishes away without changing the colour of the water. Similarly, after sugar gets dissolved in water, there is no change in the smell or temperature of sugar water. Therefore, the change in temperature, smell or colour cannot be used to identify the change for this case.

After dissolving sugar, the water which has no taste starts to taste sweet. So change in taste can be used to identify the change here.

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Question 02
On dissolving sugar in water at room temperature solution feels cool to touch. Under which of the following cases dissolution of sugar will be most rapid?
(a) Sugar crystals in cold water (b) Sugar crystals in hot water
(b) Powdered sugar in cold water (d) Powdered sugar in hot water

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