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Standard VII

Chemistry

Alkali and Bases

Among the oxi...

Question

Among the oxides, $M n_{2} O_{7} (I), V_{2} O_{3} (I I), V_{2} O_{S} (I I I), C r O (I V)$ and $C r_{2} O_{3} (V)$ the basic oxides are :

I

and

I I

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I I

and

I I I

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I I I

and

I V

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I I

and

I V

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Solution

The correct option is B $I I$ and $I V$
The oxides of metals in their lower oxidation states are basic,. e.g., $V_{2} O_{3}$ and $C r O$

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Similar questions

Identify the types of oxides:-

(i) $Z n O$

(ii) $H_{2} O$

(iii) $C O_{2}$

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I . T l_{2} O

I I . A l_{2} O_{3}

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I V . G a_{2} O_{3}

Q. Question 24
Which among the following are unsaturated hydrocarbons?

(a) (i) and (iii)
(b) (ii) and (iii)
(c) (ii) and (iv)
(d) (iii) and (iv)

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Question 10
Which among the following have scales?

(i) Amphibians
(ii) Pisces
(iii) Reptiles
(iv) Mammals

(a) (i) and (iii)
(b) (iii) and (iv)
(c) (ii) and (iii)
(d) (i) and (ii)

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Among the oxides, Mn2O7(I),V2O3(II),V2OS(III),CrO(IV) and Cr2O3(V) the basic oxides are :

The correct option is B II and IVThe oxides of metals in their lower oxidation states are basic,. e.g., V2O3 and CrO

Among the oxides, $M n_{2} O_{7} (I), V_{2} O_{3} (I I), V_{2} O_{S} (I I I), C r O (I V)$ and $C r_{2} O_{3} (V)$ the basic oxides are :

The correct option is B $I I$ and $I V$
The oxides of metals in their lower oxidation states are basic,. e.g., $V_{2} O_{3}$ and $C r O$