Why is `I_2` less reactive that ICl?

Why is H_(2) more reactive than D_(2) ?

Give reason: Why Lanthanoids are less reactive than actinoids.

Aryl halides are less reactive than alkyl halides towards nucleophilic substitution reactions because of :

Why is potassium more reactive than sodium?

Why is potassium more reactive than sodium?

Which of the following statements are not correct ? (I) PCl_5 is known but PBr_3 is not known. (II) In S_2F_10 , sulphur atoms have octahedral geometry. (III) SF_4 is much less reactive than SF_6 . (IV) Bleaching action of chlorine is permanent because it bleaches by reduction.

Which method will you use to reduce the following ? (i) Oxides of less reactive metals (ii) Oxides of moderately reactive metals (iii) Oxides of highly reactive metals. explain by giving a suitable example.