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

HARD

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Fluorine is the most electronegative atom, though ${BF}_{3}$ is the strongest Lewis acid amongst ${BX}_{3}$ .

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Important Questions on The p-Block Elements

MEDIUM

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

Which of the following is incorrect about Borazine?

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

Borazine, also known as inorganic benzene, can be prepared by the reaction of

3

-equivalents of "

X

" with

6

-equivalents of "

Y

". "

X

" and "

Y

", respectively are

HARD

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

Among the following, the correct statement(s) is(are)

EASY

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

Which of the following molecules does not exist as monomer in its major form?

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

HARD

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

A molecular adduct is formed between

{BF}_{3}

and

{Et}_{2} O .

Which of the following values describe the coordination number

(CN)

, valency

(V)

and oxidation state

(OS)

B

atom in this adduct?

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.

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

{BF}_{3}

is planar and electron deficient compound. Hybridization and number of electrons around the central atom, respectively are:

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 Lewis acid strength of

B B r_{3}, B C l_{3}

and

B F_{3}

is in the order

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:

HARD

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

For compound having the formula

{GaAlCl}_{4}

, the correct option from the following is

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

What is the atomicity of aluminium phosphate?

EASY

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

The alloy used in the construction of aircrafts is:

MEDIUM

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

In which one of the following molecules strongest back donation of an electron pair from halide to boron is expected?

MEDIUM

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

The order of acidic strength of boron trihalides

HARD

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

The reaction of

H_{3} N_{3} B_{3} C l_{3} (A)

with

L i B H_{4}

in tetrahydrofuran gives inorganic benzene

(B)

. Further, the reaction of

(A)

with

(C)

leads to

H_{3} N_{3} B_{3} {(M e)}_{3}

. Compounds

(B)

and

(C)

respectively, are:

Fluorine is the most electronegative atom, though BF3 is the strongest Lewis acid amongst BX3.

Important Questions on The p-Block Elements

Learn and Prepare for any exam you want !

Fluorine is the most electronegative atom, though ${BF}_{3}$ is the strongest Lewis acid amongst ${BX}_{3}$ .