Question

Which of the following is TRUE about a combination reaction?

A. The number of reactants is always greater than the number of products.

B. The number of products is always greater than the number of reactants.

C. The number of products is always equal to the number of reactants.

D. (Any of the above can be true for different reactions.)

Answer 1

Answer:

1st one is true .

A + B = AB

Na+ Cl = NaCl

here the no. of reactants are 2 but product is only 1

Answer 2

A. The number of reactants is always greater than the number of products.

• A direct combination reaction is one in which two or more substances (reactants) combine to create a single substance. It is sometimes referred to as a synthesis reaction (product).
• These processes are described by equations of the form X + Y⇒ XY . A combination reaction occurs when two or more components combine to form a single compound. In other terms, a combination reaction is a chemical reaction that occurs when two or more atoms or compounds react to create a single component.
• A combination reaction can have any number of reactants.
• Combination reactions are often exothermic because heat is generated during the formation of the link between the reactants.

Hence, the correct answer is A.

#SPJ2