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d- and f-Block Elements

JEE Advanced 2024 Paper 2NumericalMedium📈 Topic in 17% papers+4
Ques. 1JEE Advanced 2024 (Paper-2)

The number of zinc ions present in the molecular formula of Q is .

Answer

3

Solution

P = K4[Fe(CN)6]. With ZnCl2 in slightly acidic medium it forms the sparingly soluble double salt potassium zinc ferrocyanide:

2K4[Fe(CN)6] + 3ZnCl2 K2Zn3[Fe(CN)6]2 + 6KCl

Q = K2Zn3[Fe(CN)6]2 3 zinc ions.

Answer: 3

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Ques. 2JEE Advanced 2025 (Paper-1)

One of the products formed from the reaction of permanganate ion with iodide ion in neutral aqueous medium is

  1. I2
  2. IO3-
  3. IO4-
  4. IO2-
Ques. 3JEE Advanced 2025 (Paper-1)

The pair(s) of diamagnetic ions is(are)

  1. La3+, Ce4+
  2. Yb2+, Lu3+
  3. La2+, Ce3+
  4. Yb3+, Lu2+
Ques. 4JEE Advanced 2024 (Paper-2)

The number of moles of potassium iodide required to produce two moles of P is .

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