In which type of chemical reaction due to a more reactants combined to form one product only

As we know that a type of chemical reaction in which two elements as reactants:

C(s) + O2(g) ∆> CO2(g)

Here, ∆ = Heat Energy.

Here, reactants = C(s) + O2(g)

and, product = CO2(g)

This type of reaction is known as combination reaction. It is also known as addition reaction.

the correct answer is b. a strong acid completely dissociates to its ions when dissolved in water. completely dissociates to and ions. a is incorrect because does not fully ionize to and ions and some remain as the compound . c and d are incorrect because, and do not fall into the category of bronsted lowry acids. a bronsted lowry acid is a proton donor and since both molecules do not have a proton to donate they are not bronsted lowry acids. likewise,   if we use the lewis acid definition, they cannot be acids. a lewis acid is an electron pair acceptor. both and have a complete octet so can not accept any electrons which disqualifies them as acids.