MCQ
Tollen's reagent is
- ✓${\left[ {Ag{{\left( {N{H_3}} \right)}_2}} \right]^ + }$
- B$A{g_2}O$
- C${\left[ {Cu{{\left( {OH} \right)}_4}} \right]^{2 - }}$
- D$C{u_2}O$
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What will be $B$ ?

| $List-I$ | $List-II$ |
| $A$ $\left( NH _{4}\right)_{2} Cr _{2} O _{7} \stackrel{\Delta}{\longrightarrow}$ | $I$ $H _{2}$ |
| $B$ $KMnO _{4}+ HCl \rightarrow$ | $II$ $N _{2}$ |
| $C$ $Al + NaOH + H _{2} O \rightarrow$ | $III$ ${ O _{2}}$ |
| $D$ $NaNO _{3} \stackrel{\Delta}{\longrightarrow}$ | $IV$ ${ Cl _{2}}$ |
Choose the correct answer from the options given below.