Consider the following reactions (unbalanced) Z n + H o t c o n c . H 2 S O 4 → G + R + X Z n + c o n c . N a O H → T + Q G + H 2 S + N H 4 O H → Z a p r e c i p i t a t e + X + Y Choose the correct option(s).

The oxidation state of Z n in T is + 1

EASY

Earn 100

Given below are two statements:

Statement I : Aqueous solution of $K_{2} {Cr}_{2} O_{7}$ is preferred as a primary standard in volumetric analysis over ${Na}_{2} {Cr}_{2} O_{7}$ aqueous solution.

Statement II : $K_{2} {Cr}_{2} O_{7}$ has a higher solubility in water than ${Na}_{2} {Cr}_{2} O_{7}$ . In the light of the above statements, choose the correct answer from the options given below:

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Important Questions on Transition and Inner Transition Elements

EASY

Chemistry>Inorganic Chemistry>Transition and Inner Transition Elements>Potassium Dichromate and Potassium Permanganate

Which is the correct equation for the reaction of

AgCl

with

{NH}_{4} OH ?

MEDIUM

Chemistry>Inorganic Chemistry>Transition and Inner Transition Elements>Potassium Dichromate and Potassium Permanganate

A mixture of

NaCl

and

K_{2} {Cr}_{2} O_{7}

is heated with conc.

H_{2} {SO}_{4}

, deep red vapours and formed. Which of the following statement is false ?

EASY

Chemistry>Inorganic Chemistry>Transition and Inner Transition Elements>Potassium Dichromate and Potassium Permanganate

An aqueous solution consists of

{Pb}^{2 +}

and

{Cu}^{2 +}

ions. Which of the following reagents is suitable for separating them?

EASY

Chemistry>Inorganic Chemistry>Transition and Inner Transition Elements>Potassium Dichromate and Potassium Permanganate

An example of a non-stoichiometric oxide when heated is

EASY

Chemistry>Inorganic Chemistry>Transition and Inner Transition Elements>Potassium Dichromate and Potassium Permanganate

The number of water molecules not coordinated to copper ion directly in

C u S O_{4} \cdot 5 H_{2} O,

MEDIUM

Chemistry>Inorganic Chemistry>Transition and Inner Transition Elements>Potassium Dichromate and Potassium Permanganate

Dichromate ion is treated with base, the oxidation number of

Cr

in the product formed is

EASY

Chemistry>Inorganic Chemistry>Transition and Inner Transition Elements>Potassium Dichromate and Potassium Permanganate

Acidified potassium dichromate is treated with hydrogen sulphide. In the reaction, the oxidation number of chromium

MEDIUM

Chemistry>Inorganic Chemistry>Transition and Inner Transition Elements>Potassium Dichromate and Potassium Permanganate

In the reaction, $2 {CuCl}_{2} + 2 H_{2} O + {SO}_{2} \to A + H_{2} {SO}_{4} + 2 HCl$

$A$ is

HARD

Chemistry>Inorganic Chemistry>Transition and Inner Transition Elements>Potassium Dichromate and Potassium Permanganate

Which one of the following statements is correct when

S O_{2}

is passed through acidified

K_{2} C r_{2} O_{7}

solution?

MEDIUM

Chemistry>Inorganic Chemistry>Transition and Inner Transition Elements>Potassium Dichromate and Potassium Permanganate

Consider the following reactions (unbalanced)

Z n + H o t c o n c . H_{2} S O_{4} \to G + R + X

Z n + c o n c . N a O H \to T + Q

G + H_{2} S + {N H}_{4} O H \to Z (a p r e c i p i t a t e) + X + Y

Choose the correct option(s).

EASY

Chemistry>Inorganic Chemistry>Transition and Inner Transition Elements>Potassium Dichromate and Potassium Permanganate

In the structure of the dichromate ion, there is a :

MEDIUM

Chemistry>Inorganic Chemistry>Transition and Inner Transition Elements>Potassium Dichromate and Potassium Permanganate

Name the gas that can readily decolourise acidified

{KMnO}_{4}

solution.

EASY

Chemistry>Inorganic Chemistry>Transition and Inner Transition Elements>Potassium Dichromate and Potassium Permanganate

The nature of oxides

V_{2} O_{3}

and

CrO

is indexed as

' X'

and

' Y'

type respectively. The correct set of

X

and

Y

is:

EASY

Chemistry>Inorganic Chemistry>Transition and Inner Transition Elements>Potassium Dichromate and Potassium Permanganate

To a solution of a colourless efflorescent sodium salt, when dilute acid is added, a colourless gas is evolved along with formation of a white precipitate. Acidified dichromate solution turns green, when the colourless gas is passed through it. The sodium salt is

EASY

Chemistry>Inorganic Chemistry>Transition and Inner Transition Elements>Potassium Dichromate and Potassium Permanganate

The number of hydrogen bonded water molecule(s) associated with stoichiometry

{CuSO}_{4} \cdot 5 H_{2} O

is __________.

EASY

Chemistry>Inorganic Chemistry>Transition and Inner Transition Elements>Potassium Dichromate and Potassium Permanganate

The fusion of chromite ore

({FeCr}_{2} O_{4})

with

{Na}_{2} {CO}_{3}

in air gives a yellow solution upon addition of water. Subsequent treatment with

H_{2} {SO}_{4}

produces an orange solution. The yellow and orange colours, respectively, are due to the formation of

EASY

Chemistry>Inorganic Chemistry>Transition and Inner Transition Elements>Potassium Dichromate and Potassium Permanganate

Consider the following statements.

1 .

The aqueous solution of

{FeCl}_{3}

is acidic in nature.

2 .

Anhyd.

{FeCl}_{3}

can be obtained by heating hydrated ferric chloride.

3 .

A solution of ferric chloride on standing gives a brown precipitate.
The correct statement (s) is/are

MEDIUM

Chemistry>Inorganic Chemistry>Transition and Inner Transition Elements>Potassium Dichromate and Potassium Permanganate

A metal

(A)

on heating in nitrogen gas gives compound

B .

B

on treatment with

H_{2} O

gives a colourless gas which when passed through

C u S O_{4}

solution gives a dark blue-violet coloured solution.

A

and

B

respectively, are:

EASY

Chemistry>Inorganic Chemistry>Transition and Inner Transition Elements>Potassium Dichromate and Potassium Permanganate

The sum of the total number of bonds between chromium and oxygen atoms in chromate and dichromate ions is ______________.

MEDIUM

Chemistry>Inorganic Chemistry>Transition and Inner Transition Elements>Potassium Dichromate and Potassium Permanganate

Which of the following statements is/are false?

Important Questions on Transition and Inner Transition Elements

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