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Variation of Valency

The correct s...

Question

The correct statements among I to III regarding group 13 element oxides are:
I. Boron trioxide is acidic.
II. Oxides of aluminium and gallium are amphoteric.
III. Oxides of indium and thallium are basic.

I, II and III

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I and III only

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I and II only

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II and III only

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Solution

The correct option is A I, II and III
All the given statements are correct. For group 13 elements, the acidic nature of oxides decreases and the basic nature of oxides increases on moving from $B$ to $T l$ . This is because as we move down the group, the atomic size of elements goes on increasing, whereas the ionisation energy decreses, due to which the strength of metal oxide ( $M O$ ) bond goes on decreasing. Thus, boron trioxide or boron oxide is acidic and reacts with basic oxides to give metal borates. Aluminium and gallium oxides are amphoteric while oxides of indium and thallium are basic in nature.

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Similar questions

Q. The correct statements among I to III regarding group 13 elements oxide are:
(I) Boron trioxide is acidic
(II) Oxides of aluminium and gallium are amphoteric
(III) Oxides of indium and thallium are basic.

Q. Consider the following statements and arrange in the order of true/false as given in the codes:

S_{1}

: Oxides of boron

(B_{2} O_{3})

and silicon

(S i O_{2})

are acidic in nature.

S_{2}

: Oxides of aluminium

(A l_{2} O_{3})

and gallium

(G a_{2} O_{3})

are amphoteric in nature.

S_{3}

: Oxides of indium

(l n_{2} O_{3})

and thallium

(T l_{2} O_{3})

are basic in nature.

S_{4}

: Oxides of germanium

(G e O_{2})

and tin

(S n O_{2})

are acidic in nature.

Identify the types of oxides:-

(i) $Z n O$

(ii) $H_{2} O$

(iii) $C O_{2}$

(iv) $N O$

Select the correct statements among the following.

I)

V_{2} O_{5}

and

C r_{2} O_{3}

are amphoteric oxides.

I I)

Interstitial compounds of transition elements have an exact formulae.

I I I)

In its higher oxidation states, manganese forms stable compounds with oxygen and fluorine.

Q. The oxides of

15^{t h}

group elements of the type

M_{2} O_{3}

which will exhibit amphoteric or basic properties but no acidic properties are__________.

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Variation of Valency

Standard X Chemistry

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The correct statements among I to III regarding group 13 element oxides are: I. Boron trioxide is acidic. II. Oxides of aluminium and gallium are amphoteric. III. Oxides of indium and thallium are basic.

The correct statements among I to III regarding group 13 element oxides are:
I. Boron trioxide is acidic.
II. Oxides of aluminium and gallium are amphoteric.
III. Oxides of indium and thallium are basic.