MCQ
The prefix zepto stands for
- A${10^9}$
- B${10^{ - 12}}$
- C${10^{ - 15}}$
- ✓${10^{ - 21}}$
$1$ zepto $ = {10^{ - 21}}$
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$2 Cu ^{2+}+4 X ^{-} \rightarrow Cu _2 X _2( s )+ X _2$