Question

The correct order of increasing $pH$ values of the aqueous solutions of baking soda, rock salt, washing soda and slaked lime is:

• A. Baking soda $<$ Rock salt $<$ Washing Soda $<$ Slaked lime
• B. Rock Salt $<$ Baking Soda $<$ Washing Soda $<$ Slaked lime
• C. Slaked lime $<$ Washing Soda $<$ Rock Salt $<$ Baking Soda
• D. Washing Soda $<$ Baking Soda $<$ Rock Salt $<$ Slaked lime

Answer 1

The correct option is B Rock Salt $<$ Baking Soda $<$ Washing Soda $<$ Slaked lime

Rock salt $=NaCl$,
Baking soda $=NaHC{O}_3$
Washing soda $=N{a}_{2}C{O}_3$
Slaked lime $=Ca(OH{)}_2$
Increasing order of $pH$ values
Rock Salt $<$ Baking Soda $<$ Washing Soda $<$ Slaked lime.