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NTA Abhyas JEE Main2020Chemistryd and f Block ElementsPractice

X + K 2 CO 3 + Air ⟶ heat Y Y + Cl 2 ⟶ Z Pink Which of the following is correct ?

Options

  1. AX= black, MnO 2 , Y= Blue, K 2 CrO 4 ,       Z=KMnO 4
  2. BX= green, Cr 2 O 3 ,   Y= Yellow, K 2 CrO 4 ,   Z=K 2 Cr 2 O 7
  3. CX= black, MnO 2 , Y= green, K 2 MnO 4 , Z=KMnO 4
  4. DX= black; Bi 2 O 3 , Y= colourless KBiO 2 , Z= KBiO 3

Correct answer

C. X= black, MnO 2 , Y= green, K 2 MnO 4 , Z=KMnO 4

Step-by-step solution

2 MnO 2 X + 2 K 2 CO 3 + O 2 air ⟶ Δ 2 K 2 MnO 4 green Y + 2 CO 2 (g) 2 K 2 MnO 4 Y + Cl 2 ⟶ 2 KMnO 4 (Z) Pink + 2 KCl

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