NEET Chemistry - New - p-Block Elements

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Question - 1

The correct order of N-compounds in its decreasing order of oxidation states is :

  • A HNO3, NH4Cl, NO, N2
  • B HNO3, NO, NH4Cl, N2
  • C HNO3, NO, N2, NH4Cl
  • D NH4Cl, N2, NO, HNO3

Question - 2

When copper is heated with cone. HNO3 it produces:

  • A Cu(NO3)2, NO and NO2
  • B Cu(NO3)2 and N2O
  • C Cu(NO3)2 and NO2
  • D Cu(NO3)2 and NO

Question - 3

Which of the following statements is not valid for oxoacids of phosphorus?

  • A Orthophosphoric acid is used in the manufacture of triple superphosphate.
  • B Hypophosphorous acid is a diprotic acid.
  • C Alloxoacids contain tetrahedral four coordinated phosphorus
  • D All oxoacids contain at least one P=O unit and one P-OH group.

Question - 4

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

  • A +3, +5, +4
  • B +5, +3, +4
  • C +5, +4, +3
  • D +3, +4, +5

Question - 5

How many bridging oxygen atoms are present in P4O10?

  • A 6
  • B 4
  • C 2
  • D 5

Question - 6

The electronegativity difference between N and F is greater than that between Nand H yet the dipole moment of NH3(1.5 D) is larger than that of NF3  (0.2 D). This is because:

  • A in NH3 the atomic dipole and bond dipole are in the opposite directions whereas in NF3 these are in the same direction.
  • B in NH3 as well as in NF3 the atomic dipole and bond dipole are in the same direction.
  • C in NH3 the atomic dipole and bond dipole are in the same direction where as in NF3 these are in opposite directions.
  • D in NH3 as well as in NF3 the atomic dipole and bond dipole are in opposite directions.

Question - 7

Which of the following oxides is most acidic?

  • A As2O5
  • B P2O5
  • C N2O5
  • D Sb2O5

Question - 8

Which of the following phosphorus is the most reactive?

  • A Scarlet phosphorus
  • B White phosphorus
  • C Red phosphorus
  • D Violet phosphorus

Question - 9

Repeated use of which one of the following fertilizers would increase the acidity of the soil?

  • A Ammonium sulphate
  • B Superphosphate of lime
  • C Urea
  • D Potassium nitrate

Question - 10

Which of the following has the highest dipole moment?

  • A SbH3
  • B AsH3
  • C NH3
  • D PH3