Discussion
Match the following pertaining to paint sample :
| List - I (Paint Pigment) | List - II (Colour of Paint) |
|---|---|
| a. Titanium Dioxide | i. Red |
| b. Cobalt Salt | ii. Blue |
| c. Graphite | iii. White |
| d. Lead tetra-oxide | iv. Black |
Codes : a b c d
Answer: D
The correct pairing is a-iii, b-ii, c-iv, d-i. Titanium dioxide is the common white pigment, cobalt salts give blue, graphite is black, and lead tetroxide (red lead) is red.
The other code strings give titanium dioxide a non-white colour or make graphite red or white, which does not match the properties of these pigments. Pigment identification of this kind helps in comparing a paint chip from a scene with a suspect surface, because the pigment mixture and its colour give a class characteristic.
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