Can we use the same blue litmus paper that turned into red when poured a drop of acid, again to obtain blue litmus paper again.

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Solution

When we add a drop of base on the litmus paper that turned red on adding acid, it turns blue.

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Similar questions

Q. What do we observe on pouring acetic acid on red blue litmus papers ?
(a) Red litmus remains red and blue litmus turns red.
(b) Red litmus turns blue and blue litmus remains blue.
(c) Red litmus turns blue and blue litmus turns red.
(d) Red litmus becomes colourless and blue litmus remains blue.

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:

A drop of colourless liquid is poured over blue litmus paper and it turns to red. The colourless liquid is:

Q. Acids, acidic oxide and acidic salts :
(a) will turn red litmus blue
(b) will turn blue litmus red
(c) will turn pH paper orangish red
(d) will turn pH paper green

Q. What do we observe on pouring acetic acid on red and blue litmus paper?

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Can we use the same blue litmus paper that turned into red when poured a drop of acid, again to obtain blue litmus paper again. ​​

When we add a drop of base on the litmus paper that turned red on adding acid, it turns blue.

Can we use the same blue litmus paper that turned into red when poured a drop of acid, again to obtain blue litmus paper again.