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

The colour of K M n O 4 is due to: [where M → metal, L → ligand]

L → M charge transfer transition

M → L charge transfer transition

EASY

Earn 100

Explain the heating effect on $K_{2} {Cr}_{2} O_{7}$ .

Important Questions on d- and f-Block Elements

MEDIUM

Chemistry>Inorganic Chemistry>d- and f-Block Elements>Some Important Compounds of Transition Metals

Thermal decomposition of a Mn compound

(X)

513 K

results in compound

Y,

M n O_{2}

and a gaseous product.

M n O_{2}

reacts with

N a C l

and concentrated

H_{2} S O_{4}

to give a pungent gas

Z

X, Y

and

Z,

respectively, are:

EASY

Chemistry>Inorganic Chemistry>d- and f-Block Elements>Some Important Compounds of Transition Metals

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

MEDIUM

Chemistry>Inorganic Chemistry>d- and f-Block Elements>Some Important Compounds of Transition Metals

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).

MEDIUM

Chemistry>Inorganic Chemistry>d- and f-Block Elements>Some Important Compounds of Transition Metals

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:

MEDIUM

Chemistry>Inorganic Chemistry>d- and f-Block Elements>Some Important Compounds of Transition Metals

Which of the following statements is/are false?

MEDIUM

Chemistry>Inorganic Chemistry>d- and f-Block Elements>Some Important Compounds of Transition Metals

When a mixture of manganese dioxide, potassium hydroxide and potassium chlorate is fused, the product obtained is

MEDIUM

Chemistry>Inorganic Chemistry>d- and f-Block Elements>Some Important Compounds of Transition Metals

The manganate and permanganate ions are tetrahedral, due to:

EASY

Chemistry>Inorganic Chemistry>d- and f-Block Elements>Some Important Compounds of Transition Metals

A solid

' X'

on reaction with

dil HCl

liberates a gas

' Y'

, which decolorises acidified

{KMnO}_{4}

X, Y

respectively are:

MEDIUM

Chemistry>Inorganic Chemistry>d- and f-Block Elements>Some Important Compounds of Transition Metals

When

X O_{2}

is fused with an alkali metal hydroxide in presence of an oxidizing agent such as

{KNO}_{3}

; a dark green product is formed which disproportionate in acidic solution to afford a dark purple solution.

X

is:

EASY

Chemistry>Inorganic Chemistry>d- and f-Block Elements>Some Important Compounds of Transition Metals

How many peroxy linkages are present in

C r O_{5}

MEDIUM

Chemistry>Inorganic Chemistry>d- and f-Block Elements>Some Important Compounds of Transition Metals

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 ?

MEDIUM

Chemistry>Inorganic Chemistry>d- and f-Block Elements>Some Important Compounds of Transition Metals

The colour of

K M n O_{4}

is due to: [where

M \to

metal,

L \to

ligand]

EASY

Chemistry>Inorganic Chemistry>d- and f-Block Elements>Some Important Compounds of Transition Metals

When dil. sulphuric acid reacts with aqueous solution of potassium chromate, the colour changes from yellow to orange. This shows that

EASY

Chemistry>Inorganic Chemistry>d- and f-Block Elements>Some Important Compounds of Transition Metals

The ionic charges of manganate and permanganate ion are respectively

EASY

Chemistry>Inorganic Chemistry>d- and f-Block Elements>Some Important Compounds of Transition Metals

Aqueous solution of a salt

(A)

forms a dense white precipitate with

{BaCl}_{2}

solution. The precipitate dissolves in dilute

HCl

to produce a gas

(B)

which decolourises acidified

{KMnO}_{4}

solution.

A

and

B

respectively are :

EASY

Chemistry>Inorganic Chemistry>d- and f-Block Elements>Some Important Compounds of Transition Metals

Which is the correct equation for the reaction of

AgCl

with

{NH}_{4} OH ?

EASY

Chemistry>Inorganic Chemistry>d- and f-Block Elements>Some Important Compounds of Transition Metals

Which one of the following titrations of permanganate does not give satisfactory results?

MEDIUM

Chemistry>Inorganic Chemistry>d- and f-Block Elements>Some Important Compounds of Transition Metals

Name the gas that can readily decolourise acidified

{KMnO}_{4}

solution.

HARD

Chemistry>Inorganic Chemistry>d- and f-Block Elements>Some Important Compounds of Transition Metals

Which one of the following statements is correct when

S O_{2}

is passed through acidified

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

solution?

EASY

Chemistry>Inorganic Chemistry>d- and f-Block Elements>Some Important Compounds of Transition Metals

Which of the following compounds is formed when a mixture of

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

and

NaCl

is heated with concentrated

H_{2} {SO}_{4}

Explain the heating effect on K2Cr2O7.

Important Questions on d- and f-Block Elements

Learn and Prepare for any exam you want !

Explain the heating effect on $K_{2} {Cr}_{2} O_{7}$ .