Which of the following compounds on reaction with ammonical silver nitrate solution forms precipitate of silver?

Which of the following polymers is used in electrophoresis in the form of gel?

An ideal gas on isothermal reversible compression from 10L to 5L performs 1730J of work at 300 K. Calculate number of moles of gas involved in compression? (R = 8.314 J K$$^{-1}$$ mol$$^{-1}$$)

Identify the correct statement about properties of interstitial compounds.