MCQOPTIONS
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| 1. |
A blue litmus paper was first dipped I dilute hydrochloric acid and then in dilute sodium hydroxide solution. It was observed that the colour of the litmus paper: |
| A. | changed to red |
| B. | changed first to red and then to blue |
| C. | changed blue to colourless |
| D. | remained blue in both solutions. |
| Answer» C. changed blue to colourless | |