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JEE Main 20245 AprilEvening Shift
Exam
JEE Main
Year
2024
Date
5 April
Shift
Evening Shift
Subject
Chemistry
Chapter
d and f Block Elements

JEE Main 2024 · 5 April · Evening Shift · Chemistry · d and f Block Elements

The number of ions from the following that have the ability to...

The number of ions from the following that have the ability to liberate hydrogen from a dilute acid is _____. (\mathrm{Ti}^{2+}, \mathrm{Cr}^{2+}) and (\mathrm{V}^{2+})

Options

  1. A2
  2. B3
  3. C1
  4. D0

Correct answer

B. 3

Step-by-step solution

The ions Ti+2, V+2\mathrm{Ti}^{+2}, \mathrm{~V}^{+2}Cr+2\mathrm{Cr}^{+2}arestrongreducingagentsandwillliberatehydrogenfromadiluteacid,eg.are strong reducing agents and will liberate hydrogen from a dilute acid, eg.2 \mathrm{Cr}_{(aq.) \text{(aq.) }}^{+2}+2\mathrm{H}_{(aq.) \text{aq.) }}^{+} \longrightarrow 2 \mathrm{Cr}_{(aq.) \text{aq.) }}^{+3}+H2(\mathrm{H}_2( g\mathrm{~g})
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