MCQ
The percentage of copper and oxygen in samples of $CuO$ obtained by different methods were found to be the same. This illustrates the law of
- ✓Constant proportions
- BConservation of mass
- CMultiple proportions
- DReciprocal proportions
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| List$-I$ | List$-II$ |
| $A$ $H _3 O ^{+}$ | $I$ Tetrahedral |
| $B$ Acetylide anion | $II$ Linear |
| $C$ $NH _4^{+}$ | $III$ Pyramidal |
| $D$ $ClO _2^{-}$ | $IV$ Bent |
Choose the correct answer from the options given below :

Which conformer of above compound is most stable across $C_2 - C_3$ ?