MCQ
Hard soaps are:
- ACalcium salts of higher fatty acids.
- BMagnesium salts of higher fatty acids.
- CPotassium salts of higher fatty acids.
- ✓Sodium salts of higher fatty acids.
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$C{u_{\left( s \right)}} + 2Ag_{\left( {aq} \right)}^ + \to Cu_{\left( {aq} \right)}^{2 + } + 2A{g_{\left( s \right)}}$
$(a)$ ${CrO}_{3}$ $(b)$ ${Fe}_{2} {O}_{3}$ $(c)$ ${MnO}_{2}$ $(d)$ ${V}_{2} {O}_{5}$ $(e)$ ${Cu}_{2} {O}$

$(i)$ $PtCl _{4} . 5 NH _{3}$ $(ii)$ $PtCl _{4} . 4 NH _{3}$ $(iii)$ $PtCl _{4} . 3 NH _{3}$ $(iv)$ $PtCl _{4}. 2 NH _{3}$
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