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Question

Colemanite is
  1. Na2B4O710H2O
  2. Ca2B6O115H2O
  3. NaBO2
  4. H3BO3

A
Na2B4O710H2O
B
NaBO2
C
H3BO3
D
Ca2B6O115H2O
Solution
Verified by Toppr

Colemanite, an ore of boron is Ca2B6O115H2O is a borate mineral found in evaporite deposits of alkaline lacustrine environments.

Colemanite is a secondary mineral that forms by alteration of borax and ulexite.

Hence, option B is correct.

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