JEE Questions for Chemistry Class 11 P Block Elements Quiz 7 - MCQExams.com

A hydride of nitrogen which is acidic is
  • NH3
  • N2H4
  • N2H2
  • N3H
On strongly heating Pb(NO3)2 crystals, the gas formed is
  • NO2
  • O2
  • NO2 + O2
  • NO
Oxygen molecule exhibits
  • Paramagnetism
  • Diamagnetism
  • Ferromagnetism
  • Ferrimagnetism
The element which is essential in nitrogen fixation is
  • Zinc
  • Copper
  • Molybdenum
  • Boron
Carborundum is obtained when silica is heated at high temperature with
  • Carbon
  • Carbon monoxide
  • Carbon dioxide
  • Calcium carbonate
Moderate electrical conductivity is shown by
  • Silica
  • Graphite
  • Diamond
  • Carborundum
Which of the following is a good conductor of heat and electricity
  • Anthracite
  • Diamond
  • Charcoal
  • Graphite
Aqua regia is a mixture of
  • 3 HCl + 1 HNO3
  • H3PO4 + H2SO4
  • 3 HNO3 + 1 HCl
  • HCl + CH3COOH
Which is the most explosive ?
  • NCl3
  • PCl3
  • AsCl3
  • All
Ammonia is a Lewis base. It forms complexes with cations. Which one of the following cation does not form complex with ammonia ?
  • Ag+
  • Cu2+
  • Cd2+
  • Pb2+
Synthesis gas is a mixture of
  • Steam and CO
  • CO and N2
  • H2and CO
  • H2 and CH4
Which of the following does not give NO2 on heating ?
  • KNO3
  • Pb(NO3)2
  • Cu(NO3)2
  • AgNO3
Isotopes of oxygen are
  • O16, O17 and O18
  • O15, O16 and O17
  • O16, O18 O32
  • None
An important method for fixation of atmospheric N2 is
  • Fischer Tropsch process
  • Haber process
  • Frasch process
  • Solvay process
By which of the following nitrogen dioxide can’t be obtained on heating ?
  • KNO3
  • Pb (NO3)2
  • Cu(NO3)2
  • AgNO3
Laughing gas is
  • Nitrous oxide
  • Nitric oxide
  • Nitrogen trioxide
  • Nitrogen pentoxide
The bonds present in N2O5 are
  • Only ionic
  • Covalent and coordinate
  • Only covalent
  • Covalent ionic
The compound which gives off oxygen on moderate heating is
  • Cupric oxide
  • Mercuric oxide
  • Zinc oxide
  • Aluminium oxide
Amongst the trihalides of nitrogen, which one is least basic ?
  • NF3
  • NCl3
  • NBr3
  • NI3
Which of the following oxides of nitrogen is a brown coloured gas ?
  • NO2
  • NO
  • N2O
  • N2O5
Which of the following is a nitric acid anhydride ?
  • NO
  • NO2
  • N2O5
  • N2O3
Boron compounds behave as Lewis acids because of their
  • Acidic nature
  • Covalent nature
  • Electron deficient character
  • Ionization property
Oxygen will directly react with each of the following elements except
  • P
  • Cl
  • Na
  • S
Nitrogen (I) oxide is produced by
  • Thermal decomposition of ammonium nitrate
  • Disproportionation of N2O4
  • Thermal decomposition of ammonium nitrite
  • Interaction of hydroxyl amine and nitrous acid
Ammonia gas can be collected by the downward displacement of
  • Conc. H2SO4
  • Brine
  • Water
  • Mercury
The gases respectively absorbed by alkaline pyrogallol and oil of cinnamon are
  • O3, CH4
  • O2, O3
  • SO2, CH4
  • N2O, O3
Oxygen does not react with
  • P
  • Na
  • S
  • Cl
Boric acid is polymeric due to
  • Its acidic nature
  • The presence of hydrogen bonds
  • Its monobasic nature
  • Its geometry
Amongst the compounds Mg3N2, NH3 and N2O3 nitrogen shown an oxidation state of + 3 in
  • N2O3 only
  • NH3 only
  • NH3 and N2O3
  • All the three compounds
Nitrogen is essential constituent of all
  • Proteins
  • Fats
  • Proteins & Fats
  • None of these
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