A solution of $$\mathrm{Cr O_5}$$ in amyl alcohol has a __________ colour.

According to MO theory the bond orders for $$\mathrm{O}$$$$_2^{2 - }$$, $$\mathrm{CO}$$ and $$\mathrm{NO^+}$$ respectively, are

When a hydrocarbon A undergoes combustion in the presence of air, it requires 9.5 equivalents of oxygen and produces 3 equivalents of water. What is the molecular formula of A?

A doctor prescribed the drug Equanil to a patient. The patient was likely to have symptoms of which disease?