MCQ
Water turns blue cobalt chloride paper:
- ANo change
- BRed
- ✓Pink
- DOrange
✓
Answer
Correct option: C.
Pink
Cobalt chloride, $\ce{CoCl_2}$, is a fascinating compound that changes color in response to humidity. Ashumidity increases, cobalt chloride changes color from sky blue to purple to pink. Such striking changes in color make cobalt chloride useful as a humidity indicator in weather instruments.
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