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p-Block Elements (Group 15–18) · Question 49

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

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)

AIPMT 2010 (Prelims)

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

2

Among the following which is the strongest oxidising agent?

  1. Br2
  2. I2
  3. Cl2
  4. F2
AIPMT 2009
3

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
AIPMT 2008
4

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
AIPMT 2007
5

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
AIPMT 2006
6

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.
AIPMT 2006
7

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

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

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
AIPMT 2005
9

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
AIPMT 2005
10

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.
AIPMT 2003
11

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
AIPMT 2002

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