HARD

Earn 100

Iodate ions $({IO}_{3}^{-})$ can be reduced to iodine by iodide ions. The half equation which represent the redox reaction are:

${IO}_{3}^{-} (aq .) + 6 H^{+} (aq .) + 5 e^{-} \to \frac{1}{2} I_{2} (s) + 3 H_{2} O (l)$ .... (i)

$I^{-} (aq .) \to \frac{1}{2} I_{2} (s) + e^{-}$ .... (ii)

How many moles of iodine are produced for every mole of iodate ions consumed in the reaction?

14.29% studentsanswered this correctly

Important Questions on Redox Reactions

MEDIUM

Chemistry>Physical Chemistry>Redox Reactions>Balancing of Redox Reactions

For a reaction

{xNH}_{3} + {yO}_{2} \to zNO + {wH}_{2} O

, if

x = 4

then

y, z, w

are respectively

MEDIUM

Chemistry>Physical Chemistry>Redox Reactions>Balancing of Redox Reactions

Assuming complete ionization, same moles of which of the following compounds will require the least amount of acidified

K M n O_{4}

for complete oxidation?

HARD

Chemistry>Physical Chemistry>Redox Reactions>Balancing of Redox Reactions

2 {MnO}_{4}^{-} + {bC}_{2} O_{4}^{2 -} + {cH}^{+} \to {xMn}^{2 +} + {yCO}_{2} + {zH}_{2} O

If the above equation is balanced with integer coefficients, the value of

c

is _______ . (Round off to the Nearest Integer).

MEDIUM

Chemistry>Physical Chemistry>Redox Reactions>Balancing of Redox Reactions

{KMnO}_{4}

oxidises oxalic acid in acidic medium. The number of

{CO}_{2}

molecules produced per mole of

{KMnO}_{4}

MEDIUM

Chemistry>Physical Chemistry>Redox Reactions>Balancing of Redox Reactions

What are the coefficients $x, y, z, p, q, r$ and $s$ , respectively, in the following balanced equation?

${xHNO}_{2 (aq)} + {yKMnO}_{4 (aq)} + {zH}_{2} {SO}_{4 (aq)} \to {pHNO}_{3 (aq)} + q K_{2} {SO}_{4 (aq)} + {rMnSO}_{4 (aq)} + {sH}_{2} O_{(II)}$

MEDIUM

Chemistry>Physical Chemistry>Redox Reactions>Balancing of Redox Reactions

For the redox reaction

{MnO}_{4}^{-} + C_{2} O_{4}^{2 -} + H^{+} \to {Mn}^{2 +} + {CO}_{2} + H_{2} O

, the correct coefficients of the reactants for the balanced reaction are respectively

{MnO}_{4}^{-}, C_{2} O_{4}^{2 -}

and

H^{+}

HARD

Chemistry>Physical Chemistry>Redox Reactions>Balancing of Redox Reactions

The reaction of sulphur in alkaline medium is given below:

$S_{8 (s)} + a {OH}_{(aq)}^{-} \to b S_{(aq)}^{2 -} + c S_{2} O_{3 (aq)}^{2 -} + d H_{2} O_{(l)}$

The values of ' $a$ ' is______ (Integer answer)

MEDIUM

Chemistry>Physical Chemistry>Redox Reactions>Balancing of Redox Reactions

For the reaction:

I^{-} + C l O_{3}^{-} + H_{2} S O_{4} \to C l^{-} + H S O_{4}^{-} + I_{2}

The correct statement(s) in the balanced equation is/are:

MEDIUM

Chemistry>Physical Chemistry>Redox Reactions>Balancing of Redox Reactions

The coefficients $x, y$ and $z$ in the given redox reaction are respectively

$x {Cr}_{2} O_{7}^{2 -} + y {SO}_{2} + z H^{+} \to {Cr}^{+ 3} + {SO}_{4}^{2 -} + H_{2} O$

EASY

Chemistry>Physical Chemistry>Redox Reactions>Balancing of Redox Reactions

How many electrons are involved in oxidation of

{KMnO}_{4}

in basic medium ?

MEDIUM

Chemistry>Physical Chemistry>Redox Reactions>Balancing of Redox Reactions

Which of the following statement is not correct?

MEDIUM

Chemistry>Physical Chemistry>Redox Reactions>Balancing of Redox Reactions

Consider the following reaction:

x {MnO}_{4}^{-} + y C_{2} O_{4}^{2 -} + {zH}^{+} ⟶ x {Mn}^{2 +} + 2 y {CO}_{2} + \frac{z}{2} H_{2} O

The values of x, y and z in the reaction are, respectively:

EASY

Chemistry>Physical Chemistry>Redox Reactions>Balancing of Redox Reactions

In the balanced equation of the following reaction, the ratio of $a / b$ is

${aCaCO}_{3} + {bH}_{3} {PO}_{4} \to {pCa}_{3} {({PO}_{4})}_{2} + {qCO}_{2} + {rH}_{2} O$

MEDIUM

Chemistry>Physical Chemistry>Redox Reactions>Balancing of Redox Reactions

Balance the following equation

{xKMnO}_{4} + {yK}_{2} C_{2} O_{4} + {zH}^{+} \to {pMn}^{2 +} + {qCO}_{2} + {rH}_{2} O

the correct values of

x, y

and

z

are

MEDIUM

Chemistry>Physical Chemistry>Redox Reactions>Balancing of Redox Reactions

For the redox reaction:

{MnO}_{4}^{-} + C_{2} O_{4}^{2 -} + H^{+} \to {Mn}^{2 +} + {CO}_{2} + H_{2} O

What are the correct coefficients of the reactants for the balanced equation?

MEDIUM

Chemistry>Physical Chemistry>Redox Reactions>Balancing of Redox Reactions

The number of electrons involved in the reduction of permanganate to manganese dioxide in acidic medium is _____ .

EASY

Chemistry>Physical Chemistry>Redox Reactions>Balancing of Redox Reactions

What are $x$ and $y$ in the following reaction?

$x {Pb}_{3} O_{4} \to yPbO + O_{2}$

HARD

Chemistry>Physical Chemistry>Redox Reactions>Balancing of Redox Reactions

For the redox reaction

${xMnO}_{4}^{-} + {yH}_{2} C_{2} O_{4} + {zH}^{+} \to {mMn}^{2 +} + {nCO}_{2} + {pH}_{2} O$

MEDIUM

Chemistry>Physical Chemistry>Redox Reactions>Balancing of Redox Reactions

The reaction,

K_{2} {Cr}_{2} O_{7} + m {FeSO}_{4} + n H_{2} {SO}_{4} \to {Cr}_{2} {({SO}_{4})}_{3} + p {Fe}_{2} {({SO}_{4})}_{3} + K_{2} {SO}_{4} + q H_{2} O

when balanced,

m, n, p, and q

are, respectively:

EASY

Chemistry>Physical Chemistry>Redox Reactions>Balancing of Redox Reactions

The number of moles of

{KMnO}_{4}

required to oxidise one equivalent of

KI

in the presence of sulphuric acid is-

Iodate ions IO3- can be reduced to iodine by iodide ions. The half equation which represent the redox reaction are: IO3-aq.+6H+aq.+5e-→12I2s+3H2Ol .... (i) I-aq.→12I2s+e- .... (ii) How many moles of iodine are produced for every mole of iodate ions consumed in the reaction?

Important Questions on Redox Reactions

Learn and Prepare for any exam you want !