Exercise

How many methylene units are extra in the formula of the fourth member than the third member of the homologous series of alcohols?

The molecular formula ethyne is ${\mathrm{C}}_2{\mathrm{H}}_2$. From this draw its structural formula and electron-dot structure.

How is the two stage process of protein synthesis advantageous?

Those biological factors which are used to destroy the insects, weeds and pathogens, are called

The high specific heat capacity of water is the reason why the ice floats on water.

Identify Dobereiner’s triads from the following groups of elements having similar chemical properties.
1. $\mathrm{Mg} (24.3), \mathrm{Ca} (40.1), \mathrm{Sr} (87.6)$

2. $\mathrm{S}(32.1), \mathrm{Se}(79.0), \mathrm{Te}(127.6)$

3. $\mathrm{Be}(9.0), \mathrm{Mg}(24.3), \mathrm{Ca}(40.1)$

Which of the following primitive man was nicknamed as a handyman?

Write note on Java man and Peking man.