Exercise

How can Chargaff’s rule be used to infer that the genetic material of an organism is double- helix or single- helix?

An organic compound (A) with molecular formula ${\mathrm{C}}_2{\mathrm{Cl}}_3{\mathrm{O}}_2\mathrm{H}$ is obtained when (B) reacts with red $\mathrm{P}$ and ${\mathrm{Cl}}_2$. The organic compound (B) can be obtained on the reaction of methyl magnesium chloride with dry ice followed by acid hydrolysis. Give any one method by which organic compound B can be prepared from its corresponding acid chloride.

An organic compound (A) with molecular formula ${\mathrm{C}}_2{\mathrm{Cl}}_3{\mathrm{O}}_2\mathrm{H}$ is obtained when (B) reacts with red $\mathrm{P}$ and ${\mathrm{Cl}}_2$. The organic compound (B) can be obtained on the reaction of methyl magnesium chloride with dry ice followed by acid hydrolysis. Which will be the more acidic compound (A) or (B)? Why?

An organic compound (A) with molecular formula ${\mathrm{C}}_2{\mathrm{Cl}}_3{\mathrm{O}}_2\mathrm{H}$ is obtained when (B) reacts with red $\mathrm{P}$ and ${\mathrm{Cl}}_2$. The organic compound (B) can be obtained on the reaction of methyl magnesium chloride with dry ice followed by acid hydrolysis. Write down the reaction to prepare methane from the compound (B).

Why are all copper(II) halides known except that copper(II) iodide?

Why is the ${\mathrm{E}}_{({\mathrm{V}}^{+3}/{\mathrm{V}}^{+2})}^{\circ }$ value for vanadium comparatively low?

Why $\mathrm{HCl}$ should not be used for potassium permanganate titrations?

Explain the observation, at the end of each period, there is a slight increase in the atomic radius of d block elements.