MCQ
Most reducing agent is
- ✓$K$
- B$Mg$
- C$Al$
- D$Ba$
So, $Na\, <\, K ; Mg \,<\, Ca$
Alkali metals are strong reducing agents that alkaline earthmetals. so, $K\, >\, Mg$
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$($ given $=$ Atomic number of $\mathrm{Ni}: 28)$
$(a) ClO_4^-> ClO_3^-> ClO_2^-> ClO^-$ Stability order
$(b) Cl_2 > Br_2> F_2> I_2$ Bond energy
$(c) OF_2 < OH_2< OCl_2$ Bond angle
$(d) I^-> Br^-> Cl^-$ Reducing power