Kemistri Ki Kaksha Men: Techer: Pani Ka Formula Batao Pappu: H2O Mgcl2 Caso4 Alcl3 Naoh KOH HNO3 Hcl CO2 Techer: Ye Uttar Galat Hai Pappu: Madam Ye Nale Ka Pani Hai31 Dec 2017Hindi JokesPappu Jokes