Arrange the following :

N₂, O₂, F₂, Cl₂ in increasing order of bond dissociation energy

Write down the balanced equation for the reaction when:
Carbon dioxide is passed through a concentrated aqueous solution of sodium chloride saturated with ammonia.

For two given events $$A$$ and $$B,$$ $$P\left( {A \cap B} \right)$$

One hundred identical coins, each with probability, $$p,$$ of showing up heads are tossed once. If $$0 < p < 1$$ and the probability of heads showing on $$50$$ coins is equal to that of heads showing on $$51$$ coins, then the value of $$p$$ is