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The reaction between yttrium metal and d...

The reaction between yttrium metal and dilute `HCl` produces `H_(2) (g)` and `Y^(3+)` ions. The molar ratio of yttrium to that hydrogen produced is

A

`2 : 3`

B

`3 : 2`

C

` 1 : 2`

D

`2 : 1`

Text Solution

Verified by Experts

The correct Answer is:
A
`2 Y rarr 2Y^(3+) + 6e^(-) (Y rarr Y^(3+) + 3e^(-))`, (`n` factor = 3)
`6H^(o+) + 6e^(-) rarr 3H_(2) (2H^(O+) + 2e^(-) rarr H_(2))`, (`n` factor = 2)
1 eq of `Y = 1` eq of `H_(2)`
`(n = 3)` `(n = 2)`
`(1)/(3) "mol" Y = (1)/(2) "mol" H_(2)`
`:. Y : H_(2) 2 : 3`
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