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In which of the following reactions, Hyd...

In which of the following reactions, Hydrogen is liberated?
(a ) Al(s) + HCl(aq) `rightarrow` .
(b) Al(s) + `NaOH_(aq) rightarrow` .
(c ) `NaBH_4 + I_2 rightarrow`

A

a,c

B

a,b

C

b,c

D

a,b,c

Text Solution

Verified by Experts

The correct Answer is:
D
Answer(4) (a) 2Al(s) + 6HCl(aq) `rightarrow 2AlCl_3(aq) + 3H_2(g)` (b) 2Al(s) + 6NaOH(aq) `rightarrow 2Na_3AlO_3(aq) + 3H_2(g)` (c) `2NaBH_4(s) + I_2`(s) `rightarrow B_2H_6(g) + 2NaI(s) + H_2(g)` In all reactions, hydrogen gas is liberated.
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