MCQ
Spiegeleisen is an alloy of
- ✓$Fe, C $ and $Mn$
- B$Fe, Mg$ and $C$
- C$Fe, Co$ and $Cr$
- D$Fe, Cu$ and $Ni$
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
$N_2H_5 ^+ + NH_3$ $\rightleftharpoons $ $NH_4^+ + N_2H_4$
$NH_3 + HBr $ $\rightleftharpoons $ $NH_4^+ + Br^-$
$N_2H_4 + HBr$ $\rightleftharpoons $ $N_2H_5^+ + Br^-$
Based on this information, what is the order of acidic strength -

Acidified $K _2 Cr _2 O _7$, alkaline $KMnO _4, CuSO _4, H _2 O _2, Cl _2, O _3, FeCl _3, HNO _3$ and $Na _2 S _2 O _3$. The total number of reagents that can oxidise aqueous iodide to iodine is
