Question

Marble is the most decorative and highly-valued, natural stone for floors, tiles, pillars and bathing rooms. It is snow-white when pure. Coloured marble is formed due to the presence of some minerals which impart beautiful coloured lines, streaks and shades. Pick the false one.

• A. Zinc oxide may give a brown colour
• B. Ferrous silicates give green shade to marble
• C. Iron oxide gives a red colour to marble
• D. Graphite may give red and black lines

Answer 1

The correct option is A Zinc oxide may give a brown colour

$ZnO$ doesn't give a brown colour (white colour is given).