Question

Study the given flowchart carefully.

$P,Q,R$ and $S$ are respectively :

• A. Salt, sawdust, iron dust, camphor
• B. Sawdust, iron dust, camphor, salt
• C. Iron dust, camphor, sawdust, salt
• D. Camphor, iron dust, sawdust, salt

Answer 1

Answer: (D)

Camphor, iron dust, sawdust, salt

P. Magnetic substances like iron dust are separated by magnetic separation.

Q. Camphor sublimes on heating whereas salt does not sublime.

R. Sawdust can be removed from salt by mixing with water followed by sedimentation and decantation.

S. The supernatant liquid contains salt which on evaporation gives salt whereas the sediment contains sawdust.

Thus, $P$ is camphor, $Q$ is iron dust, $R$ is sawdust and $S$ is salt.

Option D is correct.