Doubt from purification of organic compounds

#1


Q19
Answer is 3

#2

Answer (3)

Step1: Balance the Neutralization of NH3 and HCl.
Step2: Find the number of moles in 200ml 1N HCl
Step3: Determine the number of moles of NH3 to be used for neutralization
Step4: The number of NH3 to be used against HCl is taken from reaction of organic compound and NaOH and thus calculate weight of N in the mixture.
Step5: Determine the percentage of N in the mixture