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Earn 100

Which of the following respond(s) to borax bead test?

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Important Questions on The p-Block Elements

EASY

Chemistry>Inorganic Chemistry>The p-Block Elements>Some Important Compounds of Boron

Identify the reaction which does not liberate hydrogen

EASY

Chemistry>Inorganic Chemistry>The p-Block Elements>Some Important Compounds of Boron

In the structure of borax, the numbers of boron atoms and B - O - B units, respectively, are

EASY

Chemistry>Inorganic Chemistry>The p-Block Elements>Some Important Compounds of Boron

The Lewis acid strength of

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

and

B F_{3}

is in the order

MEDIUM

Chemistry>Inorganic Chemistry>The p-Block Elements>Some Important Compounds of Boron

Diborane

(B_{2} H_{6})

reacts independently with

O_{2}

and

H_{2} O

to produce, respectively:

MEDIUM

Chemistry>Inorganic Chemistry>The p-Block Elements>Some Important Compounds of Boron

The number of

2

-centre-

2

-electron and

3

-centre-

2

-electron bonds in

B_{2} H_{6}

, respectively, are:

HARD

Chemistry>Inorganic Chemistry>The p-Block Elements>Some Important Compounds of Boron

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

MEDIUM

Chemistry>Inorganic Chemistry>The p-Block Elements>Some Important Compounds of Boron

Hydrolysis of

B C l_{3}

gives X which on treatment with sodium carbonate produces

Y, X

and

Y

respectively, are

EASY

Chemistry>Inorganic Chemistry>The p-Block Elements>Some Important Compounds of Boron

A mixture of Boron trichloride and hydrogen is subjected to silent electric discharge to form

x

and

HCl

x

is mixed with

{NH}_{3}

and heated to

200^{0} C

to form

y

. The formula of

y

HARD

Chemistry>Inorganic Chemistry>The p-Block Elements>Some Important Compounds of Boron

The crystalline form of borax has

EASY

Chemistry>Inorganic Chemistry>The p-Block Elements>Some Important Compounds of Boron

A l_{2} {(S O_{4})}_{3}

is used for a variety of purposes but not

MEDIUM

Chemistry>Inorganic Chemistry>The p-Block Elements>Some Important Compounds of Boron

The green colour produced in the borax bead test of a chromium(III) salt is due to -

EASY

Chemistry>Inorganic Chemistry>The p-Block Elements>Some Important Compounds of Boron

Boric acid is an acid because its molecule

HARD

Chemistry>Inorganic Chemistry>The p-Block Elements>Some Important Compounds of Boron

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:

HARD

Chemistry>Inorganic Chemistry>The p-Block Elements>Some Important Compounds of Boron

The correct statement(s) for orthoboric acid is/are

HARD

Chemistry>Inorganic Chemistry>The p-Block Elements>Some Important Compounds of Boron

Choose the correct statements about diborane;
I. It is prepared by the oxidation of sodium borohydride with iodine.
II. It undergoes cleavage reactions with Lewis bases to give borane adducts.
III. It is produced on an industrial scale by the reaction of