The compound AgF2 is an unstable compound. However, if formed, the compound acts as a very strong oxidizing agent. Why?

An oxidising agent is a substance which gains hydrogen or loses oxygen during a chemical reaction. A reducing agent is a substance which gains oxygen or loses hydrogen during a chemical...

There is absence of atmosphere on the moon,so no part of heat remains trapped in its atmosphere. That is why in day time moon gets hot and in night it cools...

(a) Oxidised substance → C6H6O2  Reduced substance → AgBrO xidising agent → AgBr  Reducing agent → C6H6O2  (b)Oxidised substance → HCHO  Reduced [Ag(NH3)2]+ substance →  Oxidising agent → [Ag(NH3)2]+ Reducing agent → HCHO  (c) Oxidised substance → HCHO  Reduced substance...

[Hint : Metal hydroxides are dissolved in excess of NH4OH. Ammonia acts as a Lewis base. It can donate electron pair to central metal atom or ion.]

[Hint : Due to the ease with which it liberates atoms of nascent oxygen.] O3 => O2 + [O]

[Hint  :  High electronegativity and more negative electron gain enthalpies of halogens.]

Because Ce4+ is most stable in Ce+3 state in aqueous solution.

A : MnO2          B : K2MnO4           C : KMnO4

Substance oxidised  :HCI Substance reduced :MnO2 Oxidising agent       :MnO2 Reducing agent       :HCI

 (c) C element is oxidised by conc. H2SO4 into two gaseous products