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Apparatus: Test tube, glass rod, beaker,...

Apparatus: Test tube, glass rod, beaker, Bunsen burner, etc.
Chemicals: Hydrochloric acid, ammonia solution, magnesium strip, quick lime, etc.
Activity 3: Take water in a beaker up to half of its capacity. Add a few pieces of quick lime (calcium oxide, CaO) to it. What will you observe?

Text Solution

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Calcium oxide and water combine to form calcium hydroxide along with the generation of large amount of heat.
`underset("oxide")underset("Calcium")(CaO_((s)))+underset(Water)(H_(2)O_((l)))rarrunderset("hydroxide")underset("Calcium")(Ca(OH)_(2(aq))+Heat`
Inference: In all the three reactions, two reactants combine to form a single product. Hence, these are combination reactions.
[Note: Students are expected to refer the accompanying QR code for demonstration of the activities.]
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