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TA) this is because the oxides of these metals can be reduced to metals by heating alone. For example :cinnabar (HgS) when heated in air is converted to mercuric oxide.
B) this is because the highly reactive metals such as sodium, calcium, aluminium, etc... are used as reducing agents because they can displace metals of low reactivity from their compounds
C) the metals in the middle of the activity series such as zinc and Mercury are moderate reactive. so as they are usually present as sulphites are carbonates in nature. it is easier to obtain a metal from its oxide as compared to its sulphide and carbonate. therefore prior to reduction the metal sulfides and carbonates must be converted into metal oxides
D) yes we can store Sodium Hydroxide in zinc vessel because sodium is more reactive than zinc and therefore zinc cannot display sodium from sodium hydroxide solution.
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B) this is because the highly reactive metals such as sodium, calcium, aluminium, etc... are used as reducing agents because they can displace metals of low reactivity from their compounds
C) the metals in the middle of the activity series such as zinc and Mercury are moderate reactive. so as they are usually present as sulphites are carbonates in nature. it is easier to obtain a metal from its oxide as compared to its sulphide and carbonate. therefore prior to reduction the metal sulfides and carbonates must be converted into metal oxides
D) yes we can store Sodium Hydroxide in zinc vessel because sodium is more reactive than zinc and therefore zinc cannot display sodium from sodium hydroxide solution.
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