Question

Which statements about single replacement reactions are correct?

Select all that apply.
A. In a single replacement reaction, one reactant is converted to two or more products.
B. In a single replacement reaction, one element in the reactant is replaced by another in the product.
C. A single replacement reaction follows the general scheme AB + CD → AD + CB.
D. An element is always a reactant in a single replacement reaction.

Answer 1

The correct statements about single replacement reactions are that one element in the reactant is replaced by another in the product, and an element is always a reactant in such a reaction.

Step-by-step explanation:

Among the choices given regarding which statements about single replacement reactions are correct, the accurate ones are:

• (B) In a single replacement reaction, one element in the reactant is replaced by another in the product.
• (D) An element is always a reactant in a single replacement reaction.

Statement (A) is incorrect because in a single replacement reaction, we don't get two or more products from one reactant, but rather one element from the reactant is replaced, resulting in a new element and a new compound as products.

Statement (C) is incorrect because it describes a double replacement reaction, not a single replacement reaction. The correct general form for a single replacement reaction is A + BC → AC + B (or Y + XZ → XY + Z for nonmetals).

Therefore, the correct statements that apply to single replacement reactions are options (B) and (D).