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Question 4 of 10Which of the following choices is a single-replacement reaction?O A. Mg + Fes → Fe + MgSO B. 2H2 + O2 → 2H20+C. 2Na+ Br2 → 2NaBrO D. Si + 2Cl2 → SICIA

Question 4 of 10Which of the following choices is a singlereplacement reactionO A Mg Fes Fe MgSO B 2H2 O2 2H20C 2Na Br2 2NaBrO D Si 2Cl2 SICIA class=

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Explanation:

Simple replacement reactions are those that occur between a compound substance (made up of more than one chemical element) and a simple substance (made up of only one type of chemical element), giving rise to another simple substance and another compound.

Generically, we have:

A + CD → AC + D

In this question, we have the following choice as a single replacement reaction:

Mg + FeS → Fe + MgS

Answer: A. Mg + FeS → Fe + MgS