When a red litmus paper is dipped in the aqueous solution of $X$ there is no change in colour.
When a blue litmus paper is dipped in the same solution it turns red.
Which among the following options can be the chemical $X$ ?

$N a_{2} O$

No worries! We‘ve got your back. Try BYJU‘S free classes today!

$S O_{2}$

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

$M g O$

No worries! We‘ve got your back. Try BYJU‘S free classes today!

$C a O$

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Open in App

Solution

The correct option is B
$S O_{2}$

We are given that the product made by reacting chemical $X$ with water did not react with red litmus paper it could be a neutral substance or an acidic substance. The next information tells us that the blue litmus turns red when it is dipped in the product, therefore, the product given to us is acidic in nature.

Among the given options only $S O_{2}$ gas can mix with water to produce an acidic solution of sulphuric acid. All other options are metallic oxides which produce basic solutions, therefore, cannot be the correct answer.

Hence the chemical $X$ is $S O_{2}$

Suggest Corrections

Similar questions

What happens when [5 MARKS]

a) A red litmus paper is dipped in a solution of calcium hydroxide.

b) A red litmus paper is dipped in a solution of sodium chloride.

c) A blue litmus paper is dipped in lemon juice.

d) A red litmus paper is dipped in distilled water.

e) A solution of sodium hydroxide is added to turmeric.

When blue litmus paper is dipped into the water, the colour of litmus paper remains same. Similarly, when a red litmus paper is dipped into the water, the colour remains same. By the above observation, we can conclude that:

Read the following statements

(i) When a red litmus paper is dipped into reaction mixture of a saponification reaction, it turns blue and the reaction is exothermic.

(ii) When a blue litmus paper is dipped into reaction mixture of a saponification reaction, its colour does not change and the reaction is exothermic

(iii) When a red litmus paper is dipped into reaction mixture of a saponification reaction, its colour does not change and the reaction is endothermic.

(iv) When a blue litmus paper is dipped into reaction mixture of a saponification reaction, its colour does not change and the reaction is endothermic.

Which of the above statements are correct

When a blue litmus paper is put in an acidic Solution, it turns red. Can the red litmus which has been formed used to indicate basicity?

In other words, can litmus paper which has changed its colour once be reused?

Q. Read the following statements:
I. When a red litmus paper is dipped into reaction mixture of a saponification reaction, it turns blue and the reaction is exothermic.
II. When a blue litmus paper is dipped into reaction mixture of a saponification reaction, its colour does not change and the reaction is exothermic.
III. When a red litmus paper is dipped into reaction mixture of a saponification reaction, its colour does not change and the reaction is endothermic.
IV. When a blue litmus paper is dipped into reaction mixture of a saponification reaction, its colour does not change and the reaction is endothermic.
Which of the above statements are correct?

Join BYJU'S Learning Program

When a red litmus paper is dipped in the aqueous solution of X there is no change in colour. When a blue litmus paper is dipped in the same solution it turns red. Which among the following options can be the chemical X?

When a red litmus paper is dipped in the aqueous solution of $X$ there is no change in colour.
When a blue litmus paper is dipped in the same solution it turns red.
Which among the following options can be the chemical $X$ ?