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AP EAMCET20226 Jul 2022Morning ShiftChemistryd and f Block ElementsActual

Which of the following ions can reduce dilute acid to give hydrogen gas?

Options

  1. ATi ²⁺, Cr ²⁺
  2. BMn ³⁺, Ti ²⁺
  3. CMn ³⁺, Cr ²⁺
  4. DCo ³⁺, Cr ²⁺

Correct answer

A. Ti ²⁺, Cr ²⁺

Step-by-step solution

Many of transition metals are sufficiently electropositive to react with dilute acid in order to produce hydrogen gas. But those having lower standard reduction potential are not able to liberate H ₂ from dilute acid.

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