Q.

The hydride ion, H-  is a stronger base than hydroxide ion, OH-, which of the following reactions will occur if sodium hydride is dissolved in H2O?

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a

H−+H2O→  H3O+aq+e−

b

H−+H2O→  OHaq−+H2g

c

H++H−→  H2Ol

d

H−+H2O→  H3Oaq−

answer is B.

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Detailed Solution

NaH+H2O→  NaOHaq+H2g↑. The reason for this reaction is hydride ion is a very strong base and abstracts hydrogen ion from water and converts itself into hydrogen.
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