The tendency of X in BX 3 X = F , Cl , OMe , NMe 2 to form a π -bond with boron follows the order

BCl 3 < BF 3 < B ( OMe ) 3 < B NMe 2 3

BF 3 < BCl 3 < B ( OMe ) 3 < B NMe 2 3

BCl 3 < B NMe 2 3 < B ( OMe ) 3 < BF 3

BCl 3 < BF 3 < B NMe 2 3 < B ( OMe ) 3

MEDIUM

Earn 100

Explain the trend of electron affinity in group $13$ elements.

Important Questions on The p-Block Elements

EASY

Chemistry>Inorganic Chemistry>The p-Block Elements>Group 13 Elements: The Boron Family

A group 13 element

^{'} X^{'}

reacts with chlorine gas to produce a compound

{XCl}_{3} . {XCl}_{3}

is electron deficient and easily reacts with

{NH}_{3} to form {Cl}_{3} X \leftarrow {NH}_{3}

adduct; however,

{XCl}_{3}

does not dimerize. X is:

EASY

Chemistry>Inorganic Chemistry>The p-Block Elements>Group 13 Elements: The Boron Family

Identify the correct statements

I)

Germanium exists only in traces.

II)

The order of electronegativity of

Si, Ge, Sn

Sn > Ge > Si

III)

All group

14

elements are available in solid state

MEDIUM

Chemistry>Inorganic Chemistry>The p-Block Elements>Group 13 Elements: The Boron Family

The stability of +1 oxidation state among

Al, Ga, In

and

Tl

increases in the sequence:

EASY

Chemistry>Inorganic Chemistry>The p-Block Elements>Group 13 Elements: The Boron Family

The alloy used in the construction of aircrafts is:

EASY

Chemistry>Inorganic Chemistry>The p-Block Elements>Group 13 Elements: The Boron Family

Good reducing nature of

H_{3} P O_{2}

is attributed to the presence of:

EASY

Chemistry>Inorganic Chemistry>The p-Block Elements>Group 13 Elements: The Boron Family

The correct statements among I to III regrading group 13 element oxides are,
(I) Boron trioxide is acidic.
(II) Oxides of aluminum and gallium are amphoteric.
(III) Oxides of indium and thallium are basic.

EASY

Chemistry>Inorganic Chemistry>The p-Block Elements>Group 13 Elements: The Boron Family

The increasing order of atomic radii of the following group

13

elements is

MEDIUM

Chemistry>Inorganic Chemistry>The p-Block Elements>Group 13 Elements: The Boron Family

The tendency of

X

{BX}_{3} (X = F, Cl, OMe, {NMe}_{2})

to form a

π

-bond with boron follows the order

EASY

Chemistry>Inorganic Chemistry>The p-Block Elements>Group 13 Elements: The Boron Family

{AlF}_{3}

is soluble in

HF

only in presence of

KF

. It is due to the formation of

MEDIUM

Chemistry>Inorganic Chemistry>The p-Block Elements>Group 13 Elements: The Boron Family

α -

chlorosodium acetate on boiling with aqueous sodium nitrite gives

MEDIUM

Chemistry>Inorganic Chemistry>The p-Block Elements>Group 13 Elements: The Boron Family

What is the atomicity of aluminium phosphate?

EASY

Chemistry>Inorganic Chemistry>The p-Block Elements>Group 13 Elements: The Boron Family

The product obtained as a result of a reaction of nitrogen with

C a C_{2}

is:

HARD

Chemistry>Inorganic Chemistry>The p-Block Elements>Group 13 Elements: The Boron Family

Choose the correct stability order of group

13

elements in their

+ 1

oxidation state.

MEDIUM

Chemistry>Inorganic Chemistry>The p-Block Elements>Group 13 Elements: The Boron Family

When metal

M

is treated with

NaOH

, a white gelatinous precipitate

X

is obtained, which is soluble in excess of

NaOH

. Compound

X

when heated strongly gives an oxide which is used in chromatography as an adsorbent. The metal

M

MEDIUM

Chemistry>Inorganic Chemistry>The p-Block Elements>Group 13 Elements: The Boron Family

The order of acidic strength of boron trihalides

EASY

Chemistry>Inorganic Chemistry>The p-Block Elements>Group 13 Elements: The Boron Family

Given below are two statements: one is labelled as Assertion $A$ and the other is labelled as Reason $R$ .

Assertion $A :$ In $T l I_{3},$ isomorphous to ${CsI}_{3}$ , the metal is present in $+ 1$ oxidation state.

Reason $R :$ $T l$ metal has fourteen $f$ electrons in its electronic configuration.

In the light of the above statements, choose the most appropriate answer from the options given below:

MEDIUM

Chemistry>Inorganic Chemistry>The p-Block Elements>Group 13 Elements: The Boron Family

Sodium borohydride upon treatment with iodine produces a Lewis acid

(X),

which on heating with ammonia produces a cyclic compound

(Y)

and a colorless gas

(Z) . X, Y

and

Z

are

EASY

Chemistry>Inorganic Chemistry>The p-Block Elements>Group 13 Elements: The Boron Family

Identify the incorrect statements from the following

I .

Tin in

+ 2

state acts as reducing agent while lead in

+ 4

state acts as strong oxidising agent.

II .

Silicon exists as both

{[{SiF}_{6}]}^{2 -}

and

{[{SiCl}_{6}]}^{2 -}

forms.

III .

The hybridisation of carbon in fullerene is

{sp}^{3}

IV .

Among

Ge, Sn

and

Pb

lowest melting point is for

Sn

EASY

Chemistry>Inorganic Chemistry>The p-Block Elements>Group 13 Elements: The Boron Family

Iodine reacts with concentrated

H N O_{3}

to yield

Y

along with other products. The oxidation state of iodine in

Y

, is:

MEDIUM

Chemistry>Inorganic Chemistry>The p-Block Elements>Group 13 Elements: The Boron Family

Which statements about Boron and its compounds, among the following are true?
(i) Boron has high density and good electrical conductivity.
(ii)

{}^{10}B

isotope metal borides are useful as protective shields in nuclear industry.
(iii) Borax and boric acid are used in the manufacture of glasses.
(iv) Orthoboric acid is toxic and hence not useful in antiseptic solutions.

Explain the trend of electron affinity in group 13 elements.

Important Questions on The p-Block Elements

Learn and Prepare for any exam you want !

Explain the trend of electron affinity in group $13$ elements.