ChemistryMedium73×since 2002Q132220 mL20 \mathrm{~mL}20 mL of 0.1 M NH4OH0.1\, \mathrm{M} \,\mathrm{NH}_{4} \mathrm{OH}0.1MNH4OH is mixed with 40 mL40 \mathrm{~mL}40 mL of 0.05MHCl0.05 \mathrm{M} \mathrm{HCl}0.05MHCl. The pH\mathrm{pH}pH of the mixture is nearest to : (Given : Kb(NH4OH)=1×10−5,log2=0.30,log3=0.48,log5=0.69,log7=0.84,log11=1.04)\mathrm{K}_{\mathrm{b}}\left(\mathrm{NH}_{4} \mathrm{OH}\right)=1 \times 10^{-5}, \log 2=0.30, \log 3=0.48, \log 5=0.69, \log 7=0.84, \log 11= 1.04)Kb(NH4OH)=1×10−5,log2=0.30,log3=0.48,log5=0.69,log7=0.84,log11=1.04)A3.2B4.2C5.2D6.2Check answerSkip