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Potassium Per...

Potassium Permanganate

Trending Questions

Q.

What is the colour of ${CrO}_{5}$ ?

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Q.

The presence of any of the halide ions i.e. chloride, bromide or iodide in a compound can be tested using _______ as a reagent.

silver nitrate solution
hydrogen sulfide
sodium hydroxide
ammonia solution

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Q.

What is the colour of the permanganate ion?

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Q.

Write the formula for Baryte.

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Q. Choose incorrect option:-

KMnO₄ is isostructural with KClO₄
Permanganate anion is diamagnetic
MnO₂ when treated with fused KOH and oxidized in air, it gives KMnO₄(purple)
Both manganate and permanganate anions are tetrahedral

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Q. The compound which will not form an acidic compound on reaction with water is ___.

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Q. In neutral medium,

K M n O_{4}

acts as a powerful oxidizing agent according to the reaction:

2 K M n O_{4} + H_{2} O \to 2 M n O_{2} + 2 K O H + 3 (O)

. The change involves

Increase of $3 e^{-}$
Loss of $3 e^{-}$
Loss of $5 e^{-}$
Gain of $5 e^{-}$

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Q. The reaction of aqueous

K M n O_{4}

with

H_{2} O_{2}

in acidic conditions gives

$M n^{2 +}$ and $O_{2}$
$M n^{2 +}$ and $O_{3}$
$M n^{4 +}$ and $O_{2}$
$M n^{4 +}$ and $M n O_{2}$

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Q. The number of moles of

K M n O_{4}

that will be needed to react completely with one mole of ferrous oxalate in acidic solution is

$\frac{3}{5}$
$\frac{4}{5}$
$\frac{2}{5}$
$1$

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Q. When

M n O_{2}

is fused with KOH, a coloured compound is formed. The product and its colour is

$K_{2} M n O_{4}, g r e e n$
$K M n O_{4}, p u r p l e$
$M n_{2} O_{3}, b r o w n$
$M n_{2} O_{4}, b l a c k$

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Q. In acidic medium if potassium permanganate is used as an oxidizing agent, we get

$M n^{2 +}$
$M n O_{2}$
$M n O_{4}^{2 -}$
$M n_{2} O_{3}$

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Q. Reduction of the metal centre in aqueous permanganate ion involves

3 electrons in neutral medium
5 electrons in neutral medium
3 electrons in alkaline medium
5 electrons in acidic medium

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Q. The number of moles of

K M n O_{4}

reduced by one mole of KI in alkaline medium is

2
1
5
$\frac{1}{5}$

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Q. Suppose you are a banana exporter from a Kerala. Recently, you acquired a contract that allows you to export your produce into Europe. As a fruit exporter, you realize that your consignment cannot be shipped from Kerala because your variety of banana has a very short shelf life because it releases more ethylene than the other varieties (Ethylene causes fruits to ripen quickly). How do you propose to extend the shelf life of your produce without going bananas?

Wrap the raw bananas in thin plastic sheets before packing
Secure the consignment in a freezer
Pluck the raw bananas earlier than usual
Package the dry bananas with traces of potassium permanganate

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Q. When

I^{-}

is oxidised by

M n O_{4}^{-}

in alkaline medium,

I^{-}

converts into:

$I O_{3}^{-}$
$I_{2}$
$I O_{4}^{-}$
$I O^{-}$

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Q. An acidified solution of

K M n O_{4}

oxidizes

sulphates
sulphites
Nitrates
ferric salts

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Q. A strip of magnesium is burnt in air and the product obtained is allowed to react with sulphuric acid. Which of the following ions are present in the final salt obtained?

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Q.  Compare hydrogen with halogen on the basis of: ion formation

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Q. Name the gas that can readily decolourise acidified

K M n O_{4}

solution.

$S O_{2}$
$P_{2} O_{5}$
$C O_{2}$
$N O_{2}$

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Q. In a redox reaction, how many moles of electrons are accepted by 1 mole of

M n O_{4}

in acidic medium?

3
5
6
$\frac{5}{2}$

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Q. The colour of

K M n O_{4}

is due to

M $\to$ L charge transfer transition
d - d transition
L $\to$ M charge transfer transition
$σ - σ^{*}$ transition

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Q. Which of the statements are incorrect about potassium permanganate?

Potassium permanganate is a violet-black crystalline solid
Potassium permanganate is stable in acidic medium
Potassium permanganate is a powerful oxidizing agent
Potassium permanganate can oxidize sulphites to sulphates

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Q.

H N O_{3}

oxidises

N H_{4}^{+}

ions to nitrogen and itself gets reduced to

N O_{2}

. The moles of

H N O_{3}

required by

1 m o l

of

(N H_{4})_{2} S O_{4}

is?

$4$
$5$
$6$
$2$

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Q. Find the oxidation number of Cr in potassium dichromate.

+1
+3
+4
+6

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Q. Assertion (A) :

N a B O_{3} / O H^{-}

can be used for oxidation of

C r^{3 +}

to

C r^{6 +}

.
Reason (R) : In alkaline solution

N a B O_{3}

produces

H_{2} O_{2}

.

(A) is correct; (R) is correct and (R) correctly explains (A).
(A) is correct; (R) is correct and (R) doesn't explain (A) correctly.
(A) is correct; (R) is incorrect.
(A) is incorrect; (R) is correct.

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Q. Assuming complete ionisation, same moles of which of the following compounds will require the least amount of acidified

K M n O_{4}

for complete oxidation?

$F e S O_{3}$
$F e (N O_{2})_{2}$
$F e C_{2} O_{4}$
$F e S O_{4}$

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