The diagram given below represents an experiment to demonstrate a particular aspect of photosynthesis. The letter ‘A’ indicates a certain condition inside the flask. Answer the questions: The diagram given below represents an experiment to demonstrate a particular aspect of photosynthesis. The letter ‘A’ indicates a certain condition inside the flask. Answer the questions:
An alternative chemical that can be used instead of KOH is:
Topic: Alternative to KOH
Try it
Pick an option and check your answer. The full worked answer is below either way.
Answer
(a) Sodium hydroxide..
SODIUM HYDROXIDE (NaOH) is also a strong ALKALI and absorbs carbon dioxide just as potassium hydroxide does, so it serves the same purpose.
THE REASONING: the chemical must be an alkali, because carbon dioxide is acidic and is absorbed by alkalis. Check the options on that test: SODIUM HYDROXIDE — an alkali. CORRECT. SODIUM CHLORIDE — common salt, neutral. Absorbs nothing. POTASSIUM CHLORIDE — a neutral salt. POTASSIUM PERMANGANATE — an oxidising agent, not an alkali.
Notice the trap in the option list: two options contain POTASSIUM and two contain a HYDROXIDE-like look. What matters is not the metal but the HYDROXIDE part — it is the OH that makes it an alkali.
Sodium hydroxide..