JEE Chemistry - P-block elements

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Question - 1

Which of the following does not form a pentachloride?

  • A P
  • B As
  • C Sb
  • D N

Question - 2

Which of the following on heating does not give nitrogen gas?

  • A NH4NO3
  • B NH4NO2
  • C Ba(N3)2
  • D (NH4)2Cr2O7

Question - 3

The element which forms oxides in all oxidation states +I to +V is

  • A N
  • B P
  • C As
  • D Sb

Question - 4

Which of the following elements is kept in water?

  • A White P
  • B Na
  • C S
  • D Si

Question - 5

For H3PO3 and H3PO4, the correct choice is 

  • A H3PO3 is dibasic and reducing
  • B H3PO4 is dibasic and non-reducing
  • C H3PO4 is tribasic and reducing
  • D H3PO3 is tribasic and non-reducing

Question - 6

Which of the following is the increasing order of enthalpy of vaporisation?

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

Question - 7

The number of P-O-P bonds in the structure of phosphorus pentoxide and phosphorus trioxide are respectively

  • A 6,6
  • B 5,5
  • C 5,6
  • D 6,5

Question - 8

Which o the following is not hydrolysed?

  • A AsCl3
  • B PF3
  • C SbCl3
  • D NF3

Question - 9

The value o oxidation number of S in S8, S2F2 and H2S are respectively

  • A -2,+1 and -2
  • B -2, -1 and +2
  • C 0,+1 and +2
  • D 0,+1 and -2

Question - 10

Which one of the following arrangements represents the correct order of electron gain enthalpy (with negative sign) of the given atomic species?

  • A F<Cl<O<S
  • B S<O<Cl>F
  • C O<S<F<Cl
  • D Cl<F<S<O