Question

How will you test that 'tea dust' is not adulterated with iron powder?

• A. Place a bar magnet near the mixture
• B. Heat the mixture
• C. Mix it in water
• D. Put the mixture under fan

Answer 1

The correct option is A

Place a bar magnet near the mixture

We can do a simple experiment to detect the presence of iron powder:
(i) Take tea dust on a paper.
(ii) Place a bar magnet over this dust.
(iii) If some particles are attracted strongly towards this magnet by clinging to it, then definitely tea dust will have iron powder.