Oxidation Reduction Reaction

Q.

Single displacement reaction involves:

1. Redox

2. Oxidation

3. Reduction

4. Heating

Q.

Which statement is correct about the following reaction?
ZnO + CO → Zn + $C{O}_2$

1. CO is being reduced.

2. ZnO is being oxidized.

3. CO₂ is being oxidized .

4. ZnO is being reduced.

Q.

Identify the type of reactions:

1. CaO+H₂O-----Ca(OH) ₂

2. CuSO₄ + Zn ZnSO₄+Cu

3. N₂ + 3H₂ ----> 2NH₃

4. Fe+2HCl---->FeCl₂

5. C+O₂--->CO₂

6.H₂SO₄ + NH₄OH ----- H₂O + (NH₄)₂SO₄

7.Mg +Fe₂O₃ ------ Fe + MgO

Q.

Which of the following statements is incorrect?

1. In oxidation, oxygen in added to a substance.

2. In reduction, Hydrogen is added to a substance.

3. Oxidizing agent is oxidized.

4. Reducing agent is oxidized.

Q. The addition of hydrogen atoms or removal of oxygen atoms is called oxidation reaction.

1. True
2. False

Q. Which of the following represents a combination reaction?

1. 
2. 
3. 
4. All of these

Q.

in the formation of magnesium chloride , name the substance that is oxidized and substance that is reduced. give me answer dont give me link

Q. Which of the statements about the reaction below are incorrect?
$2PbO\left(s\right)+C\left(s\right)\to 2Pb\left(s\right)+C{O}_2\left(g\right)$
(a) Lead is getting reduced
(b) Carbon dioxide is getting oxidized
(c) Carbon is getting oxidized
(d) Lead oxide is getting reduced

Q. ${\text{MnO}}_2\text{(s)}+4\text{HCl(aq)}\to {\text{MnCl}}_2\text{(aq)}+{\text{Cl}}_2\text{(g)}+2{\text{H}}_2\text{O(l)}$ In the above reaction, which one of them is getting reduced?

1. ${\text{MnO}}_2$
2. $\text{HCl}$
3. ${\text{Cl}}_2$
4. ${\text{MnCl}}_2$

Q. What is a chemical reaction? Give examples.

Q.

$\begin{array}{cccc}& \text{Reaction Names}& & \text{Reactions}\\ i& \text{Displacement reaction}& A& CaO+O_2\to 2Ca(OH{)}_2\\ ii& \text{Decomposition Reaction}& B& Fe+Pb(N{O}_3{)}_2\to Fe(N{O}_3{)}_2+Pb\\ iii& \text{Redox Reaction}& C& MgC{l}_2+Ca(OH{)}_2\to Mg(OH{)}_2+CaC{l}_2\\ iv& \text{Combination Reaction}& D& KCl{O}_3\to 2KCl+3O_2\\ v& \text{Double Displacement Reaction}& E& C{O}_2+H_2\to 2CO+H_{2}O\end{array}$

1. A, E, F, B and C

2. B, E, F, A and C

3. B, F, E, A and C

4. A, F, E, B and C

Q. Which of the given statements are correct about the reaction mentioned below?
$2Pb{O}_{\left(s\right)}+C_{\left(s\right)}\to 2P{b}_{\left(s\right)}+C{O}_{2\left(s\right)}$
i) Lead is getting reduced
ii) Carbon dioxide is getting oxidised
iii) Carbon is getting oxidised
iv) Lead oxide is getting reduced

1. (iii) and (iv)
2. (i) and (ii)
3. (i) and (iii)
4. (i), (ii) and (iii)

Q. Malavika had it all set for a chemical change to take place. She took Potassium Chlorate on a petri dish and kept it outside exposed to the air on the table for two hours. She knew that potassium placed highest on the reactivity chart will breakdown into its constituent elements when exposed to the atmosphere. However, that did not happen. Can you explain the reason why? [3 MARKS]

Q. Na= Na+ +1e-(reduction or oxidation?) 2Cl- +2e-=2Cl(reduction or oxidation??)

Q. Considering the following reaction, which option is correct? $Al\left(s\right)+Mn{O}_4^{-}\left(aq\right)\to Mn{O}_2+Al(OH{)}_4^{-}$

1. is oxidized
2. is reduced.
3. Al is reduced.
4. None of these.