Question

An element X forms two oxides XO and XO2. The oxide XO has no action on litmus solution but oxide X02 turns litmus solution red.
(a) What is the nature of oxide XO ?
(b) What is the nature of oxide XO2 ?
(c) Would you call element X a metal or a non-metal ? Give reason for your choice.
(d) Can you give an example of element like X ?

Lakhmir Singh Chemistry Class 10

Answer 1

a=neutral
b=acidic
c=it is non metal because it forms acidic oxide
d=carbon

Answer 2

(a) The nature of oxide XO  is neutral as it has no changes on litmus solution.

(b) The oxide $XO_2$ is 'acidic in nature' as it turns 'litmus solution red'.

(c) X is a non-metal because it forms an 'acidic and neutral oxide', which is the property of a non-metal.

(d) 'Carbon' is a 'non-metal' like the element X.

Explanation:

• Neutral oxides which are considered as neither acidic nor basic.

• Because these oxides can able to react with both acids or bases.

• Acidic solutions are considered by dissolving the compounds in water.

• If it is dissolved means the pH will be less than 7.

• Non-metal is an element that mostly needs the 'characteristics of a metal'.

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