Consider the reaction: ZnO(s) + C(s) → Zn(s) + CO(g) Which of the following correctly identifies the substance undergoing reduction in this reaction?
ZnO loses oxygen forming Zn
Reduction is the loss of oxygen. In this reaction, ZnO loses oxygen to form Zn, so ZnO is reduced; simultaneously, carbon gains oxygen to form CO, so carbon is oxidised.
Hence, the reduction is correctly identified as ZnO losing oxygen to form Zn.
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?
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?