Redox Reaction

Q. Question 3.2

Identify the substance that is oxidized and the substance that is reduced in the following reaction:

$\text{CuO(s)}+{\text{H}}_2\text{(g)}\to \text{Cu(s)}+{\text{H}}_2\text{O(l)}$

Q.

(a) Explain the following in terms of gain or loss of oxygen with one example each :

(i) oxidation (ii) reduction

(b) 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.

Q.

The following reaction $2\mathrm{Mg}+{\mathrm{O}}_2\to 2\mathrm{MgO}$ is an example of which reaction?

Q.

Zinc reacts with NaOH solution to produce.

1. O₂

2. H₂

3. NH₃

4. NO₂

Q.

Identify oxidation and reduction with their agents: $2\mathrm{Al}+{\mathrm{Fe}}_2{\mathrm{O}}_3$ gives $2\mathrm{Fe}+{\mathrm{Al}}_2{\mathrm{O}}_3$.

Q.

What is redox reaction? Give one example.

Q.

In the following reaction:
$Mn{O}_2\left(s\right)+4HCl\left(aq\right)\to MnC{l}_2\left(aq\right)+C{l}_2\left(g\right)+2H_{2}O\left(l\right)$
Identify the oxidising and reducing agents.

Q.

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

Q.

Zine oxide reacts with carbon, on heating, to form zinc metal and carbon monoxide. Write a balanced chemical equation for this reation. Name (i) oxidising agent, and (ii) reducing agent, in this reaction.

Q.

Identify the reducing agent and oxidizing agent in the following reactions:

${\mathrm{Fe}}_2{\mathrm{O}}_3+3\mathrm{CO}\to 2\mathrm{Fe}+3{\mathrm{CO}}_2$

Q.

Example of electrical decomposition reaction:

1. Electrolysis of water

2. Zinc reacts with copper sulphate

3. Heating sulphur

4. Heating copper sulphate solution

Q.

What is oxidising agent and reducing agent explain with examples . Please explain me so that I can solve any question regarding it

Q.

Write the formula for White vitriol.

Q.

Name the reducing agent in the following reaction:

$3{\mathrm{MnO}}_2+4\mathrm{Al}\to 3\mathrm{Mn}+2{\mathrm{Al}}_2{\mathrm{O}}_3$

Q.

Write the chemical equation for the following?

Manganese dioxide heated with Aluminum.

Q.

Why does the blue colour of copper sulphate solution changes to green colour when an iron nail is dipped in it ? Write chemical equation.

Q.

An example of combination reaction between an element and compound is:

1. Formation of water

2. Formation of limestone

3. Formation of sulphur trioxide

4. Formation of sulphur dioxide

Q.

Write the formula for green vitriol?

Q.

identify oxidising and reducing agents in equation

H₂ + Cl_{2 gives 2HCl}

Q.

Complete and balance the following equations:

$\mathrm{Ca}+{\mathrm{O}}_2\to$

Q.

How can I calculate the oxidation number for${\mathrm{FeSO}}_4$?

Q.

You are given the following chemical equation :

$Mg\left(s\right)+CuO\left(s\right)⟶MgO\left(s\right)+Cu\left(s\right)$

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

Q.

Why are metals reducing agents whereas non metals are oxidising agents?

Q.

A substance which oxidizes itself and reduces other is known as

1. oxidising agent

2. reducing agent

3. both (1) and (2)

4. none of these

Q.

What is reduction and oxidation ?

Q.

What is the role of lime or limestone in the extraction of Iron?

Q.

Give the balanced equation for the action of heat on the following compound:

Washing soda.

Q.

When the gases sulphur dioxide and hydrogen sulphide mix in the presence of water the reaction is :

SO₂+2H₂S=2H₂O+3S

Here hydrogen sulphide is acting as :

A. Oxidizing agent

B. Reducing agent

Q.

$\mathrm{CuO}+{\mathrm{H}}_2\to {\mathrm{H}}_2\mathrm{O}+\mathrm{Cu}$, reaction is an example of

1. redox reaction

2. decomposition reaction

3. neutralization

4. analysis reaction

Q.

The chemical process involved in the corrosion of iron is _______.

1. redox reaction

2. decomposition reaction

3. displacement reaction

4. double displacement reaction