While titrating dilute HCl solution with aqueous NaOH, which of the following will not be required?
Redox Reactions · Class 11 · JEE Main Previous Year Question
While titrating dilute HCl solution with aqueous NaOH, which of the following will not be required?
- a
Burette and porcelain tile
- b
Pipette and distilled water
- c
Clamp and phenolphthalein
- d✓
Bunsen burner and measuring cylinder
Bunsen burner and measuring cylinder
Step 1 — Standard acid-base titration requirements:
A standard titration of HCl vs NaOH requires:
- Burette (to deliver NaOH) ✓
- Porcelain tile (white background to see colour change) ✓
- Pipette (to measure exact volume of HCl) ✓
- Distilled water (to rinse apparatus, dissolve solutions) ✓
- Clamp (to hold burette) ✓
- Phenolphthalein (indicator for HCl + NaOH titration) ✓
- Conical flask (to hold the acid solution)
Step 2 — What is NOT required:
- Bunsen burner: No heating is required in a simple acid-base titration. The reaction occurs at room temperature.
- Measuring cylinder: Volumetric measurements are done with pipette and burette, not measuring cylinders (which are less accurate).
Answer: Option (4) — Bunsen burner and measuring cylinder
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