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p-Block Elements (Group 15–18)

AIPMT 2010 (Prelims)MCQEasy📈 Topic in 50% papers+4−1
Ques. 1AIPMT 2010 (Prelims)

Oxidation states of P in H4P2O5, H4P2O6, H4P2O7 are respectively

  1. +3, +5, +4
  2. +5, +3, +4
  3. +5, +4, +3
  4. +3, +4, +5

Answer

(4) +3, +4, +5

Solution

Let the oxidation state of P be x (H = +1, O = −2).

H4P2O5: 4 + 2x - 10 = 0 x = +3

H4P2O6: 4 + 2x - 12 = 0 x = +4

H4P2O7: 4 + 2x - 14 = 0 x = +5

+3, +4, +5

Answer: (4)

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

Ques. 2AIPMT 2009

Among the following which is the strongest oxidising agent?

  1. Br2
  2. I2
  3. Cl2
  4. F2
Ques. 3AIPMT 2008

Which of the following arrangements do not give the correct picture of the trends indicated against them?

  1. F2 > Cl2 > Br2 > I2 : Bond dissociation energy
  2. F2 > Cl2 > Br2 > I2 : Electronegativity
  3. F2 > Cl2 > Br2 > I2 : Oxidizing power
  4. F2 > Cl2 > Br2 > I2 : Electron gain enthalpy
Ques. 4AIPMT 2007

Which one of the following orders correctly represents the increasing acid strengths of the given acids?

  1. HOClO < HOCl < HOClO3 < HOClO2
  2. HOClO2 < HOClO3 < HOClO < HOCl
  3. HOClO3 < HOClO2 < HOClO < HOCl
  4. HOCl < HOClO < HOClO2 < HOClO3
Ques. 5AIPMT 2006

Which one of the following orders is not in accordance with the property stated against it ?

  1. F2 > Cl2 > Br2 > I2 : Bond dissociation energy
  2. F2 > Cl2 > Br2 > I2 : Oxidising power
  3. HI > HBr > HCl > HF : Acidic property in water
  4. F2 > Cl2 > Br2 > I2 : Electronegativity
Ques. 6AIPMT 2006

Which one of the following orders is not in accordance with the property stated against it?

  1. F2 > Cl2 > Br2 > I2 : Bond dissociation energy
  2. F2 > Cl2 > Br2 > I2 : Oxidising power
  3. HI > HBr > HCl > HF : Acidic property in water
  4. F2 > Cl2 > Br2 > I2 : Electronegativity.
Ques. 7AIPMT 2005

Which one of the following oxides is expected to exhibit paramagnetic behaviour?

  1. CO2
  2. SiO2
  3. SO2
  4. ClO2
Ques. 8AIPMT 2005

What is the correct relationship between the pH of isomolar solutions of sodium oxide, Na2O (pH1), sodium sulphide, Na2S (pH2), sodium selenide, Na2Se (pH3) and sodium telluride Na2Te (pH4)?

  1. pH1 > pH2 > pH3 > pH4
  2. pH1 > pH2 pH3 > pH4
  3. pH1 < pH2 < pH3 < pH4
  4. pH1 < pH2 < pH3 pH4
Ques. 9AIPMT 2005

Which one of the following orders correctly represents the increasing acid strengths of the given acids?

  1. HOClO < HOCl < HOClO3 < HOClO2
  2. HOClO3 < HOClO2 < HOClO < HOCl
  3. HOClO2 < HOClO3 < HOClO < HOCl
  4. HOCl < HOClO < HOClO2 < HOClO3
Ques. 10AIPMT 2003

Which one of the following statements is not true?

  1. Among halide ions, iodide is the most powerful reducing agent.
  2. Fluorine is the only halogen that does not show a variable oxidation state.
  3. HOCl is a stronger acid than HOBr.
  4. HF is a stronger acid than HCl.
Ques. 11AIPMT 2002

Which of the following statement is true?

  1. Silicon exhibits 4 coordination number in its compounds
  2. Bond energy of F2 is less than Cl2
  3. Mn(III) oxidation state is more stable than Mn(II) in aqueous state
  4. Elements of 15th group show only +3 and +5 oxidation states

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