Question

Why hydrogen and carbon are added in reactivity series of metal

Answer 1

Explanation:

It is useful to place carbon and hydrogen into the reactivity series because these elements can be used to extract metals. Note that zinc and iron can be displaced from their oxides using carbon but not using hydrogen. However, copper can be extracted using carbon or hydrogen.

Answer 2

Answer:

Q on reacting with hydrogen in presence of catalyst forms a saturated compound. Hence, Q will be an unsaturated compound. P is an alcohol which on dehydration with conc. H

2SO4

forms an alkene. Alkene on combustion forms CO2 and H2O.

P:- CCH CH 2 OH

Q:- CH2

=CH 2

R:- CH 3 CH3

CH 3 CH 2

OH →conc.H 2 SO 4

CH 2 =CH 2 +HH OCH 2

=CH 2 +H 2→Ni CH 3 CH 3

CH 3 CH 3 +O 2

→2CO 2 +3H 2 O

Explanation:

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