Provide the structures of the major resonance contributors when nitrobenzene reacts with an electrophile in electrophilic aromatic substitution at the meta position. Use -Cl as an electrophile.

See explanation

Explanation:

Benzene is less reactive to substitution reaction compared to the benzene containing a substituent group. A substituted benzene retains the aromatic ring while having a particular substituent which may facilitate or slow down the substitution reaction at specific positions on the benzene ring.

When chlorine is used as the electrophile, the structures that result from the substitution of C6H5NO2 at the stated position are shown in the image attached to this answer.

clouds form

solid ice forms on leaves.

water droplets form on grass.

answer : one can design an experiment using a liquid and an additive that can be added to the liquid and observe the chemical changes in the reaction species.

one would need a beaker which is filled with a known amount of the liquid in which thermometer is placed to measure the temperature changes; after addition of the additive to the liquid solution one can note down the temperature change and find whether the reaction is endothermic or exothermic in nature. by subtracting the initial temperature value with the final temperature one can find the temperature changes.

various combinations of liquid and additive can be used. liquid in this case can be a known quantity of water and additives can be epsom salt or without epsom salt the experiment can be conducted to notice the changes. water and ice, hydrogen peroxide and dry yeast, vinegar and baking soda,etc.