What is de Broglie's wavelength for a particle having mass $6.64 \times 10^{-27} \mathrm{~kg}$ moving with velocity of $3 \times 10^3 \mathrm{~ms}^{-1} ?\left[\mathrm{~h}=6.63 \times 10^{-34} \mathrm{Js}\right]$

Identify the product formed in the following reaction.

What is the IUPAC name of the following compound?

Calculate the pH of 0.02 M monobasic acid having $2 \%$ dissociation.