JEE Questions for Chemistry Class 12 P Block Elements Quiz 13 - MCQExams.com

Which Nitrogen trihalides is least basic
  • NF3
  • NCl3
  • NBr3
  • NI3
P4O6 reacts with water to give
  • H3PO3
  • H4P2O7
  • HPO3
  • H3PO4
Which does not form complex
  • N
  • P
  • As
  • Bi
Nitrogen dioxide is released by heating
  • Pb(NO3)2
  • KNO3
  • NaNO2
  • NaNO3
Concentrated nitric acid oxidizes cane sugar to
  • CO2 and H2O
  • CO and H2O
  • CO, CO2 and H2O
  • Oxalicacid and water
Red P can be obtained from white P by
  • Melting it an pouring the liquid into water
  • Heating it with a catalyst in an inest atmosphere
  • Distilling it in an inert atmosphere
  • Dissolving it in carbon disulphide and crystalising
When aluminium phosphide is reacted with dil H2SO4
  • SO2 is liberated
  • PH3 is evolved
  • H2S is evolved
  • H2 is evolved
Cyanamide process is used in the formation of
  • N2
  • HNO3
  • NH3
  • PH3
Which statement is wrong for NO
  • It is anhydride of nitrous acid
  • It dipole moment in 0.22D
  • It forms dimer
  • It is paramagnetic
Solid PCl5 exists as

  • Chemistry-Class 12 p Block Elements-2766.png
  • 2)
    Chemistry-Class 12 p Block Elements-2767.png

  • Chemistry-Class 12 p Block Elements-2768.png

  • Chemistry-Class 12 p Block Elements-2769.png
How can you synthesise nitric oxide in the lab
  • Zinc with cold and dilute HNO3
  • Zinc with Conc. HNO3
  • Cu with cold and dil HNO3
  • Heating NH4NO3
Which of the following is a cyclic phosphate
  • H5P3O10
  • H6P4O13
  • H5P5O15
  • H7P5O16
Which catalyst is used in the haber process for the manufacture of NH3
  • Pt
  • Fe+Mo
  • CuO
  • Al2O3
Which of the following has the highest dipole moment
  • NH3
  • PH3
  • SbH3
  • ASH3
Which salt can be classified as an acid salt
  • Na2SO4
  • BiOCl
  • Pb(OH)Cl
  • Na2HPO4
Which of the following is manufactured from the molecular nitrogen by bacteria
  • NO3
  • NO2
  • Amino acids
  • Ammonia
Which of the following Tendencies remains unchanged on going down in the nitrogen family
  • Highest Oxi. State
  • Non - metallic character
  • Stability of hydrides
  • Physical state

Chemistry-Class 12 p Block Elements-2773.png
  • Heating NH4NO2
  • Heating NH4NO3
  • Treating H2O2 and NaNO2
  • Treating MF3N2 with H2O
When plants and animals decay, the organic N is converted in to inorganic N. The inorganic N is in the form is
  • NH3
  • Elements of N
  • Nitrates
  • Nitrides
In an organic compound , phosphorous in estimated as

  • Chemistry-Class 12 p Block Elements-2775.png
  • 2)
    Chemistry-Class 12 p Block Elements-2776.png

  • Chemistry-Class 12 p Block Elements-2777.png

  • Chemistry-Class 12 p Block Elements-2778.png
Producer gas is a mixture of
  • CO and N2
  • CO2 and H2
  • CO and H2
  • CO2 and N2
Ammonium nitrate decomposes on heating in to
  • NH3 and HNO3
  • Nitrous oxide and H2O
  • N, H, O3
  • Nitric Oxide, NO2, H2
Non - Combustible hydride is
  • NH3
  • PH3
  • ASH3
  • SbH3
The element which catches fire in air at 30oC and is stored under water is
  • Calcium
  • Sodium
  • Phosphorous
  • Zinc
Which of the following acid exist in polymeric form
  • HPO3
  • H4P2O7
  • H3PO4
  • None
Dehydrated phosphorous trichloride in H2O gives
  • HPO3
  • H3PO4
  • H3PO2
  • NF3
Which of the following is not hydrolysed
  • AsCl3
  • PF3
  • SbCl3
  • NF3
The strongest base is
  • NH3
  • PH3
  • AsH3
  • SbH3
The cyaide ion, CN–, N2 are iso electronic. But in contrast to CN–, N2 chemically inert because of
  • Low bond energy
  • Absence of bond polarity
  • Unsymmetrical electron distribution
  • Presence of more number of electron in bonding orbitals
When lighting flash is produced, which gas may form
  • Nitrous Oxide
  • Nitric Oxide
  • Dinitrogen in oxide
  • Nitrogen pentoxide
A mixture of ammonia and air at about 800oC in the presence of Pt gauze forms
  • N2O
  • NO
  • NH2OH
  • N2O3
Which of the following is the most basic oxide
  • Bi2O2
  • Seo2
  • Al2O3
  • Sb2O3
Ammonia gas can be collected by the displacemet of
  • Conc. H2SO4
  • Brine
  • Water
  • Mercury
The chemical used for cooling in refrigeration is
  • CO2
  • NH4OH
  • NH4Cl
  • Liquid NH3
Reaction of PCl3 and PhMgBr. Would give
  • Bromobanzene
  • Chlorobenzene
  • Triphenyl phosphine
  • Dichlorobenzene
Which of the following P is most stable
  • Red
  • White
  • Black
  • All stable
The least stable hydride of 75th group elements in
  • NH3
  • PH3
  • AsH3
  • BiH3
The chemical formula of Tear gas is
  • COCl2
  • CO2
  • Cl2
  • CCl3NO2
PH4I + NaOH forms
  • PH3
  • NH3
  • P4O6
  • P4O10
Which is not an acid salt
  • NaH2PO3
  • NaH2PO2
  • Na3HP2O6
  • Na4P2O7
The number of hydroxyl group in pyrophosphoric acid is
  • 3
  • 4
  • 5
  • 7
Which of the following has the highest proton affinity
  • Stilbine
  • Arsine
  • Phosphine
  • Ammonia
Which of the following has highest B.P
  • NH3
  • PH3
  • AsH3
  • SbH3
Which of the following exihibits highest solubility in H2O
  • NH3
  • PH3
  • AsH3
  • SbH3
HNO3 in aqueous solution yield

  • Chemistry-Class 12 p Block Elements-2784.png
  • 2)
    Chemistry-Class 12 p Block Elements-2785.png

  • Chemistry-Class 12 p Block Elements-2786.png

  • Chemistry-Class 12 p Block Elements-2787.png
The three important oxidation state of P are
  • –3, +3, +5
  • –3, +3, –5
  • –3, +4, –4
  • –3,+3,+4
Which show maximum valency
  • P
  • Tin
  • Sb
  • Bi
Which oxide of N is obtained on heating ammonium nitrate at 250oC
  • Nitric oxide
  • Nitrous oxide
  • Nitrogen dioxide
  • Dinitrogen oxide
The number of P–O–P bonds in cyclic metaphos phoric acid is
  • 0
  • 2
  • 3
  • 4
The product oblained by heating (NH4)2SO4 and KCNO is
  • Hydrocyanic acid
  • Ammonia
  • Ammonium cyanide
  • Urea
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