H 3 BO 3 or B ( OH ) 3 is considered as an acid because its molecule

Accepts OH - from water, releasing a proton

Combines with proton from water molecule

HARD

Earn 100

Identify the correct statements about the anomalous behaviour of Boron

I. Boron trihalides can form dimeric structures.

II. Boron shows $+ 1$ as stable oxidation state

III. Maximum covalency of Boron is four.

IV. Boron does not form ${BF}_{6}^{6 -}$ ion.

50% studentsanswered this correctly

Important Questions on p- Block Elements

MEDIUM

Chemistry>Inorganic Chemistry>p- Block Elements>Chemical Properties of Group 13 Element

The correct option pertaining to varying chemical behaviour of the first member of a group(

s

-and

p

- block elements) compared with the subsequent members of the same group is that they
(A) exhibit the maximum covalency of

4

(B) have less electronegativity
(C) possess large charge to radius ratio

HARD

Chemistry>Inorganic Chemistry>p- Block Elements>Chemical Properties of Group 13 Element

Choose the correct stability order of group

13

elements in their

+ 1

oxidation state.

EASY

Chemistry>Inorganic Chemistry>p- Block Elements>Chemical Properties of Group 13 Element

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:

EASY

Chemistry>Inorganic Chemistry>p- Block Elements>Chemical Properties of Group 13 Element

The highest

E^{0}

(in

V

) value for

M^{+} \to M

among the group

13

elements is

EASY

Chemistry>Inorganic Chemistry>p- Block Elements>Chemical Properties of Group 13 Element

Which of these statements is not true ?

EASY

Chemistry>Inorganic Chemistry>p- Block Elements>Chemical Properties of Group 13 Element

H_{3} {BO}_{3}

B (OH)_{3}

is considered as an acid because its molecule

MEDIUM

Chemistry>Inorganic Chemistry>p- Block Elements>Chemical Properties of Group 13 Element

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>p- Block Elements>Chemical Properties of Group 13 Element

Which of the following complex ions does not exist?

EASY

Chemistry>Inorganic Chemistry>p- Block Elements>Chemical Properties of Group 13 Element

Fill in the blank with the most appropriate option given below.

We should give everyone training in citizenship, but we have______this aspect till now.

MEDIUM

Chemistry>Inorganic Chemistry>p- Block Elements>Chemical Properties of Group 13 Element

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>p- Block Elements>Chemical Properties of Group 13 Element

Identity the incorrect statement in case of diborane structure

EASY

Chemistry>Inorganic Chemistry>p- Block Elements>Chemical Properties of Group 13 Element

The molecule which is NOT hydrolysed by water at

25^{o} C

MEDIUM

Chemistry>Inorganic Chemistry>p- Block Elements>Chemical Properties of Group 13 Element

In the following reaction sequence, the compound

C

Al + N_{2} \overset{Δ}{⟶} (A) \overset{H_{2} O}{⟶} B (ppt) + C (g)

EASY

Chemistry>Inorganic Chemistry>p- Block Elements>Chemical Properties of Group 13 Element

Which one of the following elements is unable to form

{MF}_{6}^{3 -}

ion?

MEDIUM

Chemistry>Inorganic Chemistry>p- Block Elements>Chemical Properties of Group 13 Element

The type of hybridization of Boron in diborane is _____

HARD

Chemistry>Inorganic Chemistry>p- Block Elements>Chemical Properties of Group 13 Element

Group-

13

elements react with

O_{2}

in amorphous form to form oxides of type

M_{2} O_{3}

(

M =

element). Which among the following is the most basic oxide?

MEDIUM

Chemistry>Inorganic Chemistry>p- Block Elements>Chemical Properties of Group 13 Element

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

Assertion $A$ : Boron is unable to form ${BF}_{6}^{3 -}$

Reason $R$ : Size of $B$ is very small.

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

EASY

Chemistry>Inorganic Chemistry>p- Block Elements>Chemical Properties of Group 13 Element

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>p- Block Elements>Chemical Properties of Group 13 Element

A metal

(X)

dissolves both in dilute

H C l

and dilute

N a O H

to liberate

H_{2} .

Addition of

N H_{4} C l

and excess

N H_{4} O H

to an

H C l

solution of

X

produces

Y

as a precipitate.

Y

is also produced by adding

N H_{4} C l

to the

N a O H

solution of

X .

The species

X

and

Y,

respectively, are

MEDIUM

Chemistry>Inorganic Chemistry>p- Block Elements>Chemical Properties of Group 13 Element

The stability of +1 oxidation state among

Al, Ga, In

and

Tl

increases in the sequence:

Identify the correct statements about the anomalous behaviour of Boron I. Boron trihalides can form dimeric structures. II. Boron shows +1 as stable oxidation state III. Maximum covalency of Boron is four. IV. Boron does not form BF66- ion.

Important Questions on p- Block Elements

Learn and Prepare for any exam you want !

Identify the correct statements about the anomalous behaviour of Boron

I. Boron trihalides can form dimeric structures.

II. Boron shows $+ 1$ as stable oxidation state

III. Maximum covalency of Boron is four.

IV. Boron does not form ${BF}_{6}^{6 -}$ ion.