HCl changes blue litmus red in its state.

solid

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aqueous

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gaseous

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Solution

The correct option is B aqueous
Acids always turn blue litmus red. But, this is true only when the acid is in its aqueous state. Free $H_{3} O^{+}$ ions are responsible for acids to turn blue litmus red. These are not available in solid and the gaseous (molecular) form.

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Similar questions

$H C l$ gas turns blue litmus paper red - True or False?

Choose the correct option regarding the statements given below:

Statement 1: Blue litmus changes into red in acidic medium.
Statement 2: Red litmus changes into blue in basic medium.
Statement 3: Blue litmus changes into red in basic medium.
Statement 4: Red litmus changes into blue in acidic medium.

Q. Which of the following statement is true for acids?
(a) Bitter and change red litmus to blue
(b) Sour and change red litmus to blue
(c) Sour and change blue litmus to red
(d) Bitter and change blue litmus to red

Q. Question 28.
Which of the following statement is true for acids?
(a) Bitter and change red litmus to blue
(b) Sour and change red litmus to blue
(c) Sour and change blue litmus to red
(d) Bitter and change blue litmus to red

Q. An indicator which changes its colour from blue to red in acids is litmus solution.

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HCl changes blue litmus red in its state.

The correct option is B aqueousAcids always turn blue litmus red. But, this is true only when the acid is in its aqueous state. Free H3O+ ions are responsible for acids to turn blue litmus red. These are not available in solid and the gaseous (molecular) form.

The correct option is B aqueous
Acids always turn blue litmus red. But, this is true only when the acid is in its aqueous state. Free $H_{3} O^{+}$ ions are responsible for acids to turn blue litmus red. These are not available in solid and the gaseous (molecular) form.