Which of the following is not an example of a combination reaction?

Burning of Carbon

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Burning of a magnesium ribbon

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Slaking of lime

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Addition of carbon dioxide in slaked lime

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Solution

The correct option is D Addition of carbon dioxide in slaked lime
From the given options, we can see that

(a) Burning of carbon in presence of oxygen produces carbon dioxide(a single product) which is a combination reaction.

$C + O_{2} \to C O_{2}$

(b) Burning of magnesium ribbon which happens in presence of oxygen, produces magnesium oxide(a single product)

$2 M g + O_{2} \to 2 M g O$

(c) In slaking of lime, calcium hydroxide (a single product) is formed.

$C a O + H_{2} O \to C a (O H)_{2}$

(d) In addition to $C O_{2}$ and slaked lime, two products are formed, i.e., $C a C O_{3} a n d H_{2} O$ which is not a combination reaction.

$C a (O H)_{2} + C O_{2} \to C a C O_{3} + H_{2} O$

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Similar questions

Which of the following chemical reactions is an example of a combination reaction?
A. $C a (s) + 2 H C l (a q) ⟶ C a C l_{2} (a q) + H_{2} (g)$
B. $2 K C l O_{3} (s) ⟶ 2 K C l (s) + 3 O_{2} (g)$
C. $2 H_{2} O_{2} (l) ⟶ 2 H_{2} (g) + O_{2} (g)$
D. $2 S (s) + 3 O_{2} (g) ⟶ 2 S O_{3} (g)$

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