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p-Block Elements (Group 15–18)

JEE Main 2024 (Online) 27th January Morning ShiftMCQEasy📈 Topic in 10% papers+4−1
Ques. 1JEE Main 2024, 27 January (Morning Shift)

Element not showing variable oxidation state is :

  1. Bromine
  2. Iodine
  3. Chlorine
  4. Fluorine

Answer

(4) Fluorine

Solution

F is the most electronegative element and has no d orbitals in its valence shell (n = 2)

⇒ it cannot expand its octet and never shows a positive oxidation state ⇒ only −1 in compounds

∵ Cl, Br, I have vacant d orbitals ⇒ −1, +1, +3, +5, +7 (variable)

Answer: (4)

Keep practising — p-Block Elements (Group 15–18)

Ques. 2JEE Main 2024, 27 January (Evening Shift)

Given below are two statements : In the light of the above statements, choose the most appropriate answer from the options given below :

  1. Statement I is correct but Statement II is incorrect
  2. Both Statement I and Statement II are incorrect
  3. Statement I is incorrect but Statement II is correct
  4. Both Statement I and Statement II are correct
Ques. 3JEE Main 2024, 27 January (Evening Shift)

1 mole of PbS is oxidised by "X" moles of O3 to get "Y" moles of O2. X + Y = .

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