Q.

The commercial name for calcium oxide is :

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a

quick lime

b

milk of lime

c

limestone

d

slaked lime

answer is A.

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Detailed Solution

CaO is commercially known  as "quick lime" 

Quicklime or burned lime, also known as calcium oxide (CaO), is a chemical substance that is often utilized. At room temperature, it is a crystalline solid that is white, caustic, and alkaline.

Hence, option A is correct.

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