How can we obtain colour components from blue/black ink?

see full answer

Talk to JEE/NEET 2025 Toppers - Learn What Actually Works!

Real Strategies. Real People. Real Success Stories - Just 1 call away

An Intiative by Sri Chaitanya

By distillation

By evaporation

By sedimentation

By centrifugation

answer is B.

(Unlock A.I Detailed Solution for FREE)

Ready to Test Your Skills?

Check your Performance Today with our Free Mock Test used by Toppers!

Take Free Test

Detailed Solution

concept - Through the process of evaporation, we can separate the dye from the ink.
Ink is a mixture of dye in water, so the volatile solvent (water) can be separated from its non-volatile solute (dye) in a container by evaporation.
The colour component (dye) can be separated from the ink using the following procedure:
●       Take a watch glass with some ink
●       Now take the beaker of water
●       Place the watch glass over the mouth of the beaker
●       Now start heating the beaker.
●       As the beaker heats up, so does the ink in the watch glass on the beaker.
●       Evaporation starts from the hourglass.
●       Continue heating until evaporation continues and stop heating when no further change is seen on the watch glass.
●       We see that the water in the ink evaporates
●       However, the dye remains as a residue on the watch glass.
Hence, the correct option is (2).

Result Producing online coaching for JEE/NEET of south India

Largest All India Test Series for JEE/NEET

Best Books for IIT JEE

Best Books for NEET

How to Join IIT after 10th