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JEE CHEMISTRY MCQ: 13 TH GROUP ELEMENTS (P-BLOCK)

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\begin{aligned} & {Na}_2 {B}_4 {O}_7 \cdot 10 {H}_2 {O} \stackrel{\Delta}{\longrightarrow} {X}+{NaBO}_2+{H}_2 {O} \\ & {X}+{Cr}_2 {O}_3 \stackrel{\Delta}{\longrightarrow} {Y}(\text { Green coloured }) \\ & {X} \text { and } {Y} \text { are } \end{aligned}

View answer and explanation

Correct option: C

{B}_2 {O}_3 \text { and } {Cr}_2\left({BO}_2\right)_3

Option D (

B_2O_3

and

CrBO_3

) is incorrect. The correct products are

B_2O_3

and

Cr(BO_2)_3

.

More Questions from 13 TH GROUP ELEMENTS (P-BLOCK)

Practice All Chapter MCQs →

Duralumin is an alloy of: Assertion (A) : In aqueous solution

{AlCl}_3

{Al}_2 {Cl}_6

.
Reason (R) : The high enthalpy of hydration is sufficient to break the covalent dimer into

\left[M\left({H}_2 {O}\right)_6\right]^{3+}

{Cl}^{-}

{Al}_2\left({SO}_4\right)_3

is used in the following but not Which metal will give blue colour metaborate in borax bead test? Consider the following statements about boric acid.

I. It is a weak monobasic acid

II. It is not a protonic acid

III. It acts as a lewis acid

The correct statement(s) among the following is/are The correct statements from the following are:

(A) The decreasing order of atomic radii of group 13 elements is

{Tl}>{In}>{Ga}>{Al}>{B}

(B) Down the group 13 electronegativity decreases from top to bottom

(C)

{Al}

dissolves in dil.

{HCl}

{H}_2

{HNO}_3

{Al}

passive by forming a protective oxide layer on the surface

(D) All elements of group 13 exhibits highly stable +1 oxidation state

(E) Hybridisation of

{Al}

\left[{Al}\left({H}_2{O}\right)_6\right]^{3+}

\mathrm{sp}^3 \mathrm{d}^2

Choose the correct answer from the options given below: