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

Earn 100

Why thallium have positive standard reduction potential while other elements in group 13 have negative reduction potential? $(M + 3 e^{-} \to M^{3 +})$

Important Questions on The p-Block Elements

HARD

Chemistry>Inorganic Chemistry>The p-Block Elements>Atomic and Physical Properties of Group 13 Elements

Choose the correct stability order of group

13

elements in their

+ 1

oxidation state.

MEDIUM

Chemistry>Inorganic Chemistry>The p-Block Elements>Atomic and Physical Properties of Group 13 Elements

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

EASY

Chemistry>Inorganic Chemistry>The p-Block Elements>Atomic and Physical Properties of Group 13 Elements

The alloy used in the construction of aircrafts is:

MEDIUM

Chemistry>Inorganic Chemistry>The p-Block Elements>Atomic and Physical Properties of Group 13 Elements

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

HARD

Chemistry>Inorganic Chemistry>The p-Block Elements>Atomic and Physical Properties of Group 13 Elements

Which one of the following elements will remain as liquid inside pure boiling water?

MEDIUM

Chemistry>Inorganic Chemistry>The p-Block Elements>Atomic and Physical Properties of Group 13 Elements

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>Atomic and Physical Properties of Group 13 Elements

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>Atomic and Physical Properties of Group 13 Elements

Identify the correct statements about Boron.
I. It has high melting point.
II. It has high density.
III. It has high electrical conductivity
IV.

B - 10

isotope of it has high ability to absorb neutrons

EASY

Chemistry>Inorganic Chemistry>The p-Block Elements>Atomic and Physical Properties of Group 13 Elements

Given below are two statements:

Statement I: Boron is extremely hard indicating its high lattice energy.

Statement II: Boron has highest melting and boiling point compared to its other group members.

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>Atomic and Physical Properties of Group 13 Elements

The stability of +1 oxidation state among

Al, Ga, In

and

Tl

increases in the sequence:

EASY

Chemistry>Inorganic Chemistry>The p-Block Elements>Atomic and Physical Properties of Group 13 Elements

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>Atomic and Physical Properties of Group 13 Elements

What is the atomicity of aluminium phosphate?

HARD

Chemistry>Inorganic Chemistry>The p-Block Elements>Atomic and Physical Properties of Group 13 Elements

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

MEDIUM

Chemistry>Inorganic Chemistry>The p-Block Elements>Atomic and Physical Properties of Group 13 Elements

The order of acidic strength of boron trihalides

HARD

Chemistry>Inorganic Chemistry>The p-Block Elements>Atomic and Physical Properties of Group 13 Elements

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:

MEDIUM

Chemistry>Inorganic Chemistry>The p-Block Elements>Atomic and Physical Properties of Group 13 Elements

Given below are two statements:

Statement I: The decrease in first ionization enthalpy from $B$ to $Al$ is much larger than that from $Al$ to $Ga$ .

Statement II: The d orbitals in $Ga$ are completely filled.

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

EASY

Chemistry>Inorganic Chemistry>The p-Block Elements>Atomic and Physical Properties of Group 13 Elements

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>Atomic and Physical Properties of Group 13 Elements

The metal that has very low melting point and its periodic position is closer to a metalloid is

EASY

Chemistry>Inorganic Chemistry>The p-Block Elements>Atomic and Physical Properties of Group 13 Elements

The increasing order of atomic radii of the following group

13

elements is

HARD

Chemistry>Inorganic Chemistry>The p-Block Elements>Atomic and Physical Properties of Group 13 Elements

Show how the following property of elements in group

13

will change with increasing atomic number-
Ionization enthalpy

Why thallium have positive standard reduction potential while other elements in group 13 have negative reduction potential?M+3e-→M3+

Important Questions on The p-Block Elements

Learn and Prepare for any exam you want !

Why thallium have positive standard reduction potential while other elements in group 13 have negative reduction potential? $(M + 3 e^{-} \to M^{3 +})$