MCQ
Which statement is wrong for $NO$
- ✓It is anhydride of nitrous acid
- BIts dipole moment in $0.22$ $D$
- CIt forms dimer
- Dit is paramagnetic
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The number of carbon atoms present in the product $B$ is $.....$

They were labelled $ A$ and $B$ for testing.
$A$ and $ B $ were separately taken in test tubes and boiled with $NaOH$ solution.
The end solution in each tube was made acidic with dilute $HN{O_3}$ and then some $AgN{O_3}$ solution was added.
Substance $B$ give a yellow precipitate.
Which one of the following statements is true for this experiment
The correct order of $S_N1$ reactivity is