Chalk and marble are different forms of
[amp_mcq option1=”Calcium hydrogen carbonate” option2=”Calcium carbonate” option3=”Calcium acetate” option4=”Sodium carbonate” correct=”option2″]
This question was previously asked in
UPSC NDA-2 – 2020
– Marble is a metamorphic rock composed primarily of recrystallized carbonate minerals, most commonly calcite.
– Chalk is a soft, white, porous sedimentary rock, a form of limestone composed primarily of the mineral calcite.
– Calcium carbonate is also the main component of shells of marine organisms, snails, and eggshells.