MCQ
How many stereo isomers are possible for the following molecule .


- A$1$
- B$2$
- C$3$
- ✓$4$

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${H_2}(g) + \frac{1}{2}{O_2}(g) \to {H_2}O(g)$ is $\Delta {H_1}$ and that of
${H_2}(g) + \frac{1}{2}{O_2}(g) \to {H_2}O(l)$ is $\Delta {H_2}$. Then