Identify the element having general electronic configuration $$\mathrm{ns}^2 \mathrm{np}^4$$ from following.

Identify the product $$\mathrm{A}$$ obtained in the following reaction.

Phenol + Conc. Nitric acid $$\stackrel{\text { conc, } \mathrm{H}_2 \mathrm{SO}_4}{\longrightarrow} \mathrm{A}$$

What is the value of specific rotation exhibited by glucose molecule?

What type of information is collected using scanning electron microscopy?