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Manipal MET2017Chemistryd and f Block Elements

K ₂ Cr ₂ O ₇ on heating with aqueous caustic soda gives

Options

  1. ACrO ₄²⁻
  2. BCr ( OH )₂
  3. CCr ( OH )₃
  4. DCr ₂ O ₇²⁻

Correct answer

A. CrO ₄²⁻

Step-by-step solution

K ₂ Cr ₂ O on heating with aqueous alkalies gives chromates K ₂ Cr ₂ O ₇+2 NaOH ~K ₂ CrO ₄+ Na ₂ CrO ₄+ H ₂ O

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