A blue litmus paper was first dipped in dilute HCl and then in dilute NaOH solution. What was observed in the colour of the litmus paper?

changed first to red and then no change in color

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changed first to red and then to blue.

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unchanged in first and then to red.

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remained blue in both the solutions.

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Solution

The correct option is B changed first to red and then to blue.
Acid changes blue litmus paper to red and then base changes it again to blue.

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A blue litmus paper was first dipped in dil. Hcl and then in dil NaoH solution what can be observed?

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A blue litmus paper was first dipped in dilute HCl and then in dilute NaOH solution. What was observed in the colour of the litmus paper?

The correct option is B changed first to red and then to blue.Acid changes blue litmus paper to red and then base changes it again to blue.

The correct option is B changed first to red and then to blue.
Acid changes blue litmus paper to red and then base changes it again to blue.