MCQ
Which of the following molecules represents resonance?
- AO3
- B$\text{CO}^{2-}_3$
- CCO2
- DAll of these.
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$(A)$ Stereochemistry of addition - SYN ONLY
$(B)$ Regiochemistry of addition- ANTI-MARKOVNIKOV OR ANTI-MARKOVNIKOV LIKE
$HA \to A^-+ H^+$ , $\Delta H = Z$
$H^+ + OH^-\to H_2O$, $\Delta H = X$
$HA + OH^-\to A^-+ H_2O$, $\Delta H = Y$
Assertion $A :$ The amphoteric nature of water is explained by using Lewis acid/base concept.
Reason $R$ : Water acts as an acid with $NH _{3}$ and as a base with $H _{2} S$.
In the light of the above statements choose the correct answer from the options given below :