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p-Block Elements (Group 15–18) · Question 4

JEE Advanced 2025 Paper 1MCQEasy📈 Topic in 17% papers+4−1
1

The heating of NH4NO2 at 60−70 °C and NH4NO3 at 200−250 °C is associated with the formation of nitrogen containing compounds X and Y, respectively. X and Y, respectively, are

  1. N2 and N2O
  2. NH3 and NO2
  3. NO and N2O
  4. N2 and NH3

Answer

(1) N2 and N2O

Solution

Both are thermal decompositions of ammonium salts with oxidising anions (intramolecular redox).

NH4NO2 N2 + 2H2O, so X = N2.

NH4NO3 N2O + 2H2O, so Y = N2O.

Answer: (A)

JEE Advanced 2025 Paper 1

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

2

The complete hydrolysis of ICl, ClF3 and BrF5, respectively, gives

  1. IO-, ClO2- and BrO3-
  2. IO3-, ClO2- and BrO3-
  3. IO-, ClO- and BrO2-
  4. IO3-, ClO4- and BrO2-
JEE Advanced 2025 Paper 2
3

The compound(s) with P–H bond(s) is(are)

  1. H3PO4
  2. H3PO3
  3. H4P2O7
  4. H3PO2
JEE Advanced 2025 Paper 2
4

At room temperature, disproportionation of an aqueous solution of in situ generated nitrous acid (HNO2) gives the species

  1. H3O+, NO3- and NO
  2. H3O+, NO3- and NO2
  3. H3O+, NO- and NO2
  4. H3O+, NO3- and N2O
JEE Advanced 2024 Paper 1
5

Based on VSEPR model, match the xenon compounds given in List-I with the corresponding geometries and the number of lone pairs on xenon given in List-II and choose the correct option.

  1. P-5, Q-2, R-3, S-1
  2. P-5, Q-3, R-2, S-4
  3. P-4, Q-3, R-2, S-1
  4. P-4, Q-2, R-5, S-3
JEE Advanced 2024 Paper 1
6

The species formed on fluorination of phosphorus pentachloride in a polar organic solvent are

  1. [PF4]+[PF6]- and [PCl4]+[PF6]-
  2. [PCl4]+[PCl4F2]- and [PCl4]+[PF6]-
  3. PF3 and PCl3
  4. PF5 and PCl3
JEE Advanced 2024 Paper 2
7

The compound(s) having peroxide linkage is(are)

  1. H2S2O7
  2. H2S2O8
  3. H2S2O5
  4. H2SO5
JEE Advanced 2024 Paper 2

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