Question

Reaction of magnesium ribbon with dilute sulphuric acid to form magnesium sulphate and hydrogen is a combination reaction.
A. True
B. False

Answer 1

Hint: To solve these types of questions you should know the different types of reactions like displacement reaction, substitution reaction, combination reaction and etc. so you can check whether the reaction is similar to the reaction asked in a question.

Complete step-by-step answer:
According to the question, when magnesium ribbon with dilute sulphuric acid reacts to form magnesium sulphate and hydrogen, we can write this reaction as:
$Mg + {H_2}S{O_4} \to MgS{O_4} + {H_2}$
In the above equation, we can see that magnesium reacts with $SO_4$ to form $MgSO_4$ as a product and $H_2$ gas is evolved. On the basis of this reaction it is clear that Mg I replaced $H_2$ to form $H_2SO_4$ which means it is a displacement reaction. Thus, it concludes that this reaction is not a combination reaction.
Hence, option B is correct.

NOTE: In the above question, the reaction given was not a combination reaction, since a combination reaction is a reaction in which two or more elements or compounds combine to form a single compound. This reaction can be represented as:$X + Y \to XY$ For example: $2Ca + {O_2} \to 2CaO$ (formation of calcium oxide by combination of calcium and oxygen).