One mole of the complex compound Co(NH₃)₅Cl₃, gives 3 moles of ions on dissolution in water. One mole of the same complex reacts with two moles of AgNO₃ solution to yield two moles of AgCl (s). The structure of the complex is :

When CH₂ = CH - COOH is reduced with LiAlH₄, the compound obtained will be

Complete hydrolysis of cellulose gives

The reason for double helical structure of $$DNA$$ is operation of