C-12-Q050mediumsingle_mcqপরীক্ষাগারে NH3\mathrm{NH_3}NH3 প্রস্তুতিতে ব্যবহৃত—aNH4Cl+CaO\mathrm{NH_4Cl + CaO}NH4Cl+CaObNaOH+Cl2\mathrm{NaOH + Cl_2}NaOH+Cl2cH2O+NaCl\mathrm{H_2O + NaCl}H2O+NaCldH2SO4+NH3\mathrm{H_2SO_4 + NH_3}H2SO4+NH3