NaNO2+HCl\mathrm{NaNO}_{2}+\mathrm{HCl}NaNO2+HCl
HNO3\mathrm{HNO}_{3}HNO3
গাঢ় H2SO4\mathrm{H}_{2} \mathrm{SO}_{4}H2SO4
H3COCl\mathrm{H}_{3} \mathrm{COCl}H3COCl