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Combination Reaction

Which of the ...

Question

Which of the following reactions involves the combination of two elements?

C a O + C O_{2} \to C a C O_{3}

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4 N a + O_{2} \to 2 N a_{2} O

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2 S O_{2} + O_{2} \to 2 S O_{3}

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N H_{3} + H C l \to N H_{4} C l

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Solution

The correct option is B $4 N a + O_{2} \to 2 N a_{2} O$
Combination reaction is a reaction in which two elements combine together to form a single compound.It is also called as synthesis reaction.

Among the given equations, both sodium and oxygen are elements which combine to give sodium oxide.

All the other given equations has compounds in the reactant side like $C a O, C O_{2}, S O_{2}, N H_{3}, H C l$ .

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Similar questions

M n O_{2} + H C l \to M n C l_{2} + C l_{2} + H_{2} O

N H_{4} C l + C a (O H)_{2} \to N H_{3} + C a C l_{2} + H_{2} O

B a C l_{2} + A l_{2} (S O_{4})_{3} \to B a S O_{4} + A l C l_{3}

N a A l O_{2} + H_{2} O + C O_{2} \to A l H_{3} + N a_{2} C O_{3}

N H_{3} + O_{2} \to N O + H_{2} O

Z n + H N O_{3} \to Z n (N O_{3})_{2} + N O_{2} + H_{2} O

H_{2} S + O_{2} \to H_{2} O + S O_{2}

P b O + C \to P b + C O_{2}

B a C l_{2} + H_{2} S O_{4} \to B a S O_{4} + H C l

C H_{4} + O_{2} \to C O_{2} + H_{2} O

O_{2}

{C O}_{2}

O_{2}

O_{2}

{C O}_{2}

O_{2}

{C O}_{2}

The following reaction is a/an –
$C + O_{2} \to C O_{2} + H e a t$

K O_{2} + H_{2} O + C O_{2} \to K H C O_{3} + O_{2}

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