AP EAMCET20226 Jul 2022Evening ShiftChemistrySurface ChemistryActual
In the following reaction for the preparation of gold sol, a, b, c, x, y and z are a AuCl ₃+b HCHO +c H ₂ O x Au (sol) +y HCO ₂ H +z HCl
Options
- Aa=2, b=3, c=3, x=2, y=3, z=6
- Ba=2, b=3, c=2, x=2, y=3, z=4
- Ca=2, b=2, c=2, x=2, y=2, z=4
- Da=3, b=2, c=2, x=3, y=2, z=6
Correct answer
A. a=2, b=3, c=3, x=2, y=3, z=6
Step-by-step solution
Gold sol is commercially prepared by Bredig's arc method. aligned 2 AuCl ₃+3 HCHO +3 H ₂ O & 2 Au (gold) & +3 HCO ₂ H +6 HCl aligned