The increasing order of the reactivity of the following halides for the S_N1 reaction is :

Which of the following compounds will form significant amount of meta product during mono-nitration reaction?

Which of the following molecules is least resonance stabilized?

In the following reactions, ZnO is respectively acting as a/an :

(a) ZnO + Na₂O $$\to$$ Na₂ZnO₂

(b) ZnO + CO₂ $$\to$$ ZnCO₃