MCQ
A molecule of __________ contains a triple bond.
- ASulphur
- BNitrogen
- COxygen
- DCarbon
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| Ion | Colour | |
| (a) | $Ni ^{+2}$ | Yellow |
| (b) | $Fe ^{+3}$ | Yellowish - brown |
| (c) | $CrO _4{ }^{2-}$ | Yellow |
| (d) | $Fe ^{+2}$ | Green |