While titrating dilute HCl solution with aqueous NaOH, which of the following will not be required?
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- Pipette and distilled water
- Clamp and phenolphthalein
- Burette and porcelain tile
- Bunsen burner and measuring cylinder
The Correct Option is D
Solution and Explanation
The reaction \(\mathrm{HCl + NaOH \to NaCl + H_2O}\) is a fast neutralisation at room temperature, so no heating (Bunsen burner) is needed. A measuring cylinder is also not required because volumes are measured accurately with a pipette and a burette.
Hence the pair that is not required is Bunsen burner and measuring cylinder.
Answer: (4) Bunsen burner and measuring cylinder
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