Advertisements
Advertisements
प्रश्न
Is oxidation an exothermic or an endothermic reaction?
Advertisements
उत्तर
Most of the oxidation reactions are exothermic reactions because energy is released during oxidation.
Example: C (s) + O2 (g) → CO2 (g)
APPEARS IN
संबंधित प्रश्न
Why does the colour of copper sulphate solution change when an iron nail is dipped in it?
Identify the component oxidised in the following reaction:
H2S + Cl2 → S + 2HCl
When copper powder is heated strongly in air, it forms copper oxide. Write a balanced chemical equation for this reaction. Name (i) substance oxidised, and (ii) substance reduced.
Define reduction in terms of gain or loss of hydrogen with one example.
When a magnesium ribbon is heated, it burns in air to form magnesium oxide. Write a balanced chemical equation for this reaction. Name (i) substance oxidised, and (ii) substance reduced.
The process of respiration is:
(a) an oxidation reaction which is endothermic
(b) a reduction reaction which is exothermic
(c) a combination reaction which is endothermic
(d) an oxidation reaction which is exothermic
You are given the following chemical equation:
Mg (s) + CuO (s) → MgO (s) + Cu (s)
This equation represents:
(a) decomposition reaction as well as displacement reaction
(b) combination reaction as well as double displacement reaction
(c) redox reaction as well as displacement reaction
(d) double displacement reaction as well as redox reaction
Fill in the blank
Oxidation is the removal of ......................and addition of ....................
Define redox reaction.
TRUE \ FALSE
Hydrogen is a good oxidizing agent.
Electrolysis is a redox process. Explain.
Identify from the following reaction the reactants that undergo oxidation and reduction.
\[\ce{2Ag2O → 4 Ag + O2 \uparrow}\]
In what respect does hydrogen differ from:
alkali metals
Complete and balance the following equation:
\[\ce{K + H2O -> }\]________+ ________
Select the correct answer from the symbol in the bracket.
The element, which like hydrogen is a strong reducing agent.
Find the oxidation number of the elements in the following compounds.
- C in CO2
- Mn in MnSO4
- N in HNO3
Rusting of iron involves a chemical reaction which is a combination of:
Oxidation is a process which involves ____________.
Identify the oxidising agent (oxidant) in the following reactions
`2"Mg" + "O"_2 -> 2"MgO"`
During the reaction of some metals with dilute hydrochloric acid, following observations are made.
Some bubbles of a gas are seen when lead (Pb) is reacted with the acid.
Explain this observation giving suitable reason.
