Question 1 :
When Carbon monoxide is passed over heated copper oxide it gives :<br/>
Question 3 :
Out of the halogens, which one is the most powerful oxidizing agent?
Question 4 :
Iron is extracted from iron oxide using carbon monoxide as shown.<br>iron oxide + carbon monoxide $\rightarrow$ iron + carbon dioxide<br>Which statement is correct?
Question 5 :
How many moles of electrons are involved in the reduction of one mole of $MnO^-_4$ ion in alkaline medium to $MnO^-_3$?
Question 7 :
In which of the following reactions, does a non-metal act as a reducing agent?
Question 9 :
Which of the following behaves as both oxidizing and reducing agents ?<br>
Question 11 :
When an alkali metal is reacted with hydrogen then metallic hydride is formed. In this reaction:
Question 13 :
The substance oxidized and the oxidizing agent in the following reaction are respectively :<br/>$Zn+H_2SO_4\rightarrow ZnSO_4+H_2$
Question 14 :
In the reaction,<br/><br/>$3CuO+2{ NH }_{ 3 }\longrightarrow { N }_{ 2 }+3{ H }_{ 2 }O+3Cu$<br/><br/>the change of ${NH}_{3}$ to ${N}_{2}$ involves:
Question 15 : Which of the statements about the reaction below are incorrect ?<br/>$2PbO(s) + C(s) \rightarrow 2Pb(s) + CO_2(g)$<br/><br/><div>(a) Lead is getting reduced.<br/>(b) Carbon dioxide is getting oxidised.<br/>(c) Carbon is getting oxidised.<br/>(d) Lead oxide is getting reduced</div>
Question 16 :
$Al + NO_2^-  \rightarrow Al(OH)_4^- + NH_3 $<br/>The oxidizing agent for this reaction is________.
Question 19 : <p>In the reaction : ${K_4}[Fe{(CN)_6}] + {K_2}C{O_3}\rightarrow{{}}$ the product formed is</p>
Question 20 :
<span>Chemical reactions such as redox reactions involve transfer of ___________one species to other species.</span><br/>
Question 22 :
For joining railway tracks, ferric oxide is reacted with aluminium to produce aluminium oxide and iron. The balanced chemical equation for the given reaction is<br>$\underset {Ferric\ oxide}{Fe_2O_{3(x)}}+\underset {Aluminium}{2Al_{(x)}}\rightarrow \underset {Aluminium\ oxide}{Al_2O_{3(x)}}+\underset {Iron}{2Fe_{(x)}}$<br>Which of the following substances is oxidized in the given reaction?<br>
Question 23 :
Which of the following reactions do not involve oxidation or reduction:
Question 25 :
Three cations $A, B, C$ are allowed to react with ammonium hydroxide solution. $A$ and $B$ produce a dirty green precipitate and a reddish brown precipitate respectively, both of which do not dissolve on further addition of ${NH}_{4}OH$. $C$ gives pale blue colour precipitate with less amount of ammonium hydroxide and on further addition of ${NH}_{4}OH$, precipitate becomes soluble and deep blue colour solution is formed:
Question 27 :
<span>When a piece of magnesium ribbon is placed in a beaker of copper sulfate solution, which one of the following is most likely to happen?</span>
Question 28 :
Iron (III) oxide on heating with carbon monoxide gas form solid iron and liberates carbon dioxide gas. This is a:<br/>
Question 29 :
The decomposition of $KClO_3$ to $KCI$ and $O_2$ on heating is an example of:
Question 30 :
Which of the following is true for an object that is reduced in an oxidation-reduction reaction?
Question 32 : <span>In the following reaction :</span><br/><span> $A^{+} + B \rightarrow A + B^{+}$.</span><div>oxidizing agent is:</div>
Question 34 :
For the cell $Zn(s)|Zn^{2+}(aq)||Cu^{+2}(aq)|Cu(s)$. The cell potential $E_{cell}$ can be increased.
Question 37 :
What is the oxidising agent in the following reaction?<br>$2Fe^{2+}_{aq} + Cl_{2(g)} \rightarrow 2Fe^{3+}_{(aq)} + 2Cl^-_{(aq)}$
Question 40 :
$Sn{Cl}_{2}$ gives a precipitate with a solution of $Hg{Cl}_{2}$. In this process $Hg{Cl}_{2}$ is
Question 42 : In the following reaction using isotopic O in $H_2O_2$, isotopic oxygen goes________<div><br/></div><div>$2MnO_4 + 3H_2O_2^{18} \rightarrow  2MnO_2 + 3O_2 + 2H_2O + 2OH^- $</div>
Question 43 :
A dilute Ferrous sulphate solution was gradually added to the beaker containing acidified permanganate solution. The light purple colour of the solution fades and finally disappears. Which of the following is the correct explanation for the observation?
Question 46 :
In the process of burning of magnesium in air, magnesium undergoes :
Question 48 : Which of the statements about the reaction below are incorrect?<div><br/>$2PbO\left( s \right) +C\left( s \right) \rightarrow 2Pb\left( s \right) +C{ O }_{ 2 }\left( g \right) $</div><div><br/>(a) Lead is getting reduced.<br/>(b) Carbon dioxide is getting oxidised.<br/>(c) Carbon is getting oxidised.<br/>(d) Lead oxide is getting reduced.</div>
Question 50 :
The value of $x$ in the partial redox equation $Mn{O}_{4}^{-}+8{H}^{+}+xe^-\rightleftharpoons {Mn}^{2+}+4{H}_{2}O$ is
Question 53 :
${ClO_3}^- + Cl^- \rightarrow Cl_2 + ClO_2$<br/>Which of the following is correct for this reaction:
Question 55 :
Consider the reaction: $Cl_{2} + 2KI \rightarrow I_{2} + 2KCl$<br>Which species will be reduced at the cathode?
Question 56 :
On the basis of the following ${E}^{o}$ values, the strongest oxidising agent is:<br>${ \left[ Fe{ \left( CN \right) }_{ 6 } \right] }^{ 4- }\longrightarrow { \left[ Fe{ \left( CN \right) }_{ 6 } \right] }^{ 3+ }+{ e }^{ - },{ E }^{ o }=-0.35V$<br>${Fe}^{2+}\rightarrow {Fe}^{3+}+{e}^{-1}$;<br>${Fe}^{2+}\rightarrow {Fe}^{3+}+{e}^{-1};{E}^{o}=-0.77V$
Question 57 : <p>Electrolysis of water to form hydrogen and oxygen gases is :</p>
Question 58 : Which statement is correct about the following reaction ? <div>ZnO + CO $\rightarrow$ Zn + CO$_2$</div>
Question 59 :
In an experiment, 4 g of $M_2O_x$ oxide was reduced to $2.8\ g$ of the metal. If the atomic mass of the metal is $56\, g\, mol^{-1}$. The number of $O-$atoms in the oxide is:
Question 61 :
The mass of $H_{2}O_{2}$ that is completely oxidised by $30.2\ g$ of $KMnO_{4}$ (molar mass= $158\ g mol^{-1}$) in acidic medium is
Question 62 :
Among the following, find the one which is not an oxidation-reduction reaction?
Question 63 : The change in the oxidation state of Mn in $MnO^-_4$ and O in $H_2O$ in the following redox reaction is:<div><br/></div><div>$4MnO_4^-(aq) + 2H_2O(\ell) \rightarrow 4MnO_2 (s) + 3O_2(g) + 4OH^-(aq)$<br/></div>
Question 65 :
Which one of the following undergoes reduction with $H_2O_2$ in an alkaline medium?
Question 68 :
In reaction <br>$B_2H_6 +2KOH +2X \to 2Y +6H_2$.<br>$X$ and $Y$ are respectively:
Question 69 :
Which of the following is not an example of disproportional reaction ?
Question 72 :
Which one of the following reactions is an example of redox reaction ?
Question 73 :
$HOCl(aq)$ is the molecule that kills bacteria wen chlorine is added to water. <br>The following reaction produces this molecule<br>${Cl}_{2}(g)+{H}_{2}O(l)\rightleftharpoons HOCl(aq)+{H}^{+}(aq)+{Cl}^{-}(aq)$<br>Which statement about this reaction is correct?
Question 74 :
$ Mn^{2+} $ can be converted into $ Mn^{7+} $ by reacting with
Question 75 :
Which of the following reaction are disproportion reaction?<br/>a) $2Cu^+\rightarrow Cu^{2+}+Cu^o$<br/>b) $3MnO^{2-}_4+4H^+\rightarrow 2MnO_4^-+MnO_2+2H_2O$<br/>c) $2KMnO_4\xrightarrow []{\Delta}K_2MnO_4+MnO_2+O_2$<br/>d) $2MnO_4^-+3Mn^{2+}+2H_2O\rightarrow 5MnO_2+4H^{+}$
Question 76 : <div><span>Write the type of reaction.</span><br/></div>Ethene is burnt in the presence of oxygen to form carbon dioxide, water and releases heat and light.<br/>
Question 78 :
Dichloroacetic acid $ (CHCl_{2}CO_{2}H) $ is oxidized to $ CO_{2}, H_{2}O $ and $ Cl_{2} $ by 1.2 equivalents of an oxidizing agent. Same amount of the acid can neutralize 'X' moles of $ NH_{2} $ to give ammonium dichloroacetate. $ 'X' $ is
Question 80 :
A migration of hydrogen with a pair of electrons is called:
Question 81 :
In acid medium, the standard reduction potential of $NO$ converted to ${ N }_{ 2 }O$ is $1.59 V$. Its standard potential in alkaline medium would be:
Question 82 :
What is the product of the reaction of $ H_{2}O_{2} $ with $ Cl_{2} $?
Question 83 :
Statement I: When $O_{3}$ reacts with $KI,O_{3}$ is reduced into $O_{2}$.<br>Statement II: There is no change in oxidation state of oxygen, in this reaction.
Question 84 :
One gas bleaches the colour of flowers by reduction while the other gas by oxidation. The two gases are, respectively:
Question 85 :
Fill in the blanks by picking the option with appropriate words. <br>Oxidising agent is a substance which <u>P</u> itself and <u>Q</u> the other. Reducing agent is a substance which <u>R</u> itself and <u>S</u> the other. The reactions which involve be oxidation and reduction are called <u>T</u> reactions.<span><br></span>
Question 86 :
During the oxidation of arsenite ion, $AsO_{3}^{3-}$, to arsenate ion, $AsO_{4}^{3-}$, in alkaline medium, the number of moles of hydroxide ions consumed per mole of arsenite ion is
Question 87 :
When ozone is passed through dry $KOH, KO_3$ is obtained and $O_2$ is liberated. In this reaction ________ is oxidised and ________ is reduced.
Question 89 :
Identify the correct statement with respect to the following reaction.<br>$2K_2MnO_4 + Cl_2 \rightarrow 2KCl + 2 KMnO_4$
Question 90 :
The number of electrons involved when 1 mole of $H_2O_2$decomposes as <br/>$H_2O_2 \longrightarrow H_2O + O_2$ is?
Question 92 :
Which of the following given reactions is not a redox reaction?<br/>
Question 96 : A list of reactions are given below.<div><br/><div>(a) $Fe + 2 HCl \rightarrow FeCl_2 + H_2$</div><div><br/>(b) $FeS + 2HCl \rightarrow FeCl_2  + H_2 S$</div><div><br/>(c) $Fe + S \xrightarrow{\Delta} FeS$</div><div><br/>(d) $NaCl + H_2SO_4 \xrightarrow{< 200^o C} NaHSO_4 + HCl$</div><div><br/>(e) $CuSO_4 + H_2 S \rightarrow CuS + H_2SO_4$</div><div><br/>(f) $S + H_2SO_4 \rightarrow 3 SO_2 + H_2O$</div><div><br/></div><div>Identify redox reactions.</div></div>
