Sublimation is regarded as a chemical change but the slaking lime is considered a physical change?

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True

False

answer is B.

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Detailed Solution

The above statement is false.
●        Similar to melting, freezing, and evaporation, sublimation is a form of transition in phase or condition of matter.
●        Here, in this process, a state of matter, such as solid, goes through a physical shift and becomes liquid, which can then change into gaseous form. Sublimation is subsequently the physical transformation.
●        The process of slaking, on the other hand, involves adding water and transforming the original products into hydroxides.
●        Slaking of lime, then, is the process of treating lime, which has the chemical formula

{CaO}_{}

, with water to produce calcium hydroxide. The reaction proceeds as follows:

{CaO + H}_{2} O {Ca (OH)}_{2}

with a small amount of energy released. Consequently, this process is exothermic.
●        Chemical change occurs in this process, and this change cannot be undone in any way by changes in physical things.
●        Because of this, sublimation is seen as a physical change, whereas lime slaking is regarded as a chemical change.
●        As a result, the right response is that the supplied assertion is false.

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