Which of the following statements correctly explains the relation between a combination reaction and energy?
Many combination reactions are exothermic, though some can be endothermic
Most combination reactions, where two or more substances combine to form a single product, release heat and are exothermic, though a few such reactions absorb heat and are endothermic.
Hence, the correct answer is Many combination reactions are exothermic, though some can be endothermic.
Similar Questions
If a piece of aluminium is added to iron(II) sulphate (FeSO4) solution, what will happen?
Balance the following reaction:
\(3\,\text{MnO}_2\,(s) + x\,\text{Al}\,(s) \rightarrow 3\,\text{Mn}\,(l) + y\,\text{Al}_2\text{O}_3\,(s) + \text{Heat}\)
What type of ions exchange between reactants in a double displacement reaction?
Which of the following is a chemical change?
What is generally produced when a metal reacts with an acid?
What is the primary purpose of anodising aluminium?
The gas evolved when calcium reacts with water is:
When hydrochloric acid reacts with sodium hydroxide to form sodium chloride and water, which type of reaction is primarily demonstrated?
A student tries to balance the equation Fe + H2O → Fe3O4 + H2 and writes the following step:
Fe + H2O4 → Fe3O4 + H2
Which statement best explains why this step is INCORRECT?
What is formed when carbon burns in oxygen?
Important Questions from Chemical Reaction
Which of the following statement is/are true?
I. In physical change new substance is formed. substance is formed.
II. In chemical change no new substance is formed.
Which of the following cells involves similar chemical reactions?
The information not obtained from balanced chemical equation is
Oxygen cannot be obtained by which one of the following methods?
Which of the following compound is responsible for tarnishing of silver?
