JEE Questions for Chemistry Class 11 P Block Elements Quiz 8 - MCQExams.com

The strongest base is
  • NH3
  • PH3
  • AsH3
  • SbH3
When AgNO3 is heated strongly, the products formed are
  • NO and NO2
  • NO2 and O2
  • NO2 and N2O
  • NO and O2
Which one of the following is not the characteristic property of carbon ?
  • It exhibits catenation
  • It forms compounds with multiple bonds
  • Its melting point and boiling point are exceptionally high
  • It shows semi-metallic character
Nitric acid on standing develops brownish colour which may be attributed to the presence of

  • Chemistry-Class 11 p Block Elements-2200.png
  • 2)
    Chemistry-Class 11 p Block Elements-2201.png
  • NO2
  • HNO2
Ozone is not
  • An allotrope
  • A powerful oxidising agent
  • Paramagnetic
  • A bent molecule
Pure nitrogen is prepared in the laboratory by heating a mixture of
  • NH4OH + NaCl
  • NH4NO3 + NaCl
  • NH4Cl + NaOH
  • NH4Cl + NaNO2
Which statement is not correct for nitrogen ?
  • It has a small size
  • It does not readily react with O2
  • It is a typical non-metal
  • d-Orbitals are available for bonding
Nitrogen is liberated by the thermal decomposition of only
  • NH4NO2
  • NaN3
  • (NH4)2Cr2O7
  • All the three
Aqueous solution of ammonia consists of
  • H+
  • OH-

  • Chemistry-Class 11 p Block Elements-2205.png

  • Chemistry-Class 11 p Block Elements-2206.png
Which of the following oxides of nitrogen is the anhydride of nitrous acid ?
  • NO
  • N2O3
  • N2O4
  • N2O5
On the addition of mineral acid to an aqueous solution of borax, the following compound is formed
  • Boron hydride
  • Orthoboric acid
  • Metaboric acid
  • Pyroboric acid
Identify the correct statement with respect to carbon monoxide ?
  • It combines with water to form carbonic acid
  • It reacts with haemoglobin in red blood cells
  • It is a powerful oxidising agent
  • It is used to prepare aerated drinks
Which of the following types of forces bind together the carbon atoms in diamond ?
  • Ionic
  • Covalent
  • Dipolar
  • van der Waals
Water gas is produced by
  • Passing steam through a red hot coke bed
  • Saturating hydrogen with moisture
  • Mixing oxygen and hydrogen in the ratio of 1 : 2
  • Heating a mixture of CO2 and CH4 in petroleum refineries
Number of electrons shared in the formation of nitrogen molecule is
  • 6
  • 10
  • 2
  • 8
Sugarcane on reaction with nitric acid gives
  • CO2 and SO2
  • (COOH)2
  • 2 HCOOH (two moles)
  • No reaction
Nitrogen dioxide is released by heating
  • Pb(NO3)2
  • KNO3
  • NaNO2
  • NaNO3
Which would quickly absorb oxygen ?
  • Alkaline solution of pyrogallol
  • Conc. H2SO4
  • Lime water
  • Alkaline solution of CuSO4
The cyanide ion, CN‒ and N2 are isoelectronic. But in contrast to CN‒, N2 is chemically inert because of
  • Low bond energy
  • Absence of bond polarity
  • Unsymmetrical electron distribution
  • Presence of more number of electrons in bonding orbitals
Nitrogen is relatively inactive element because
  • Its atom has a stable electronic configuration
  • It has low atomic radius
  • Its electronegativity is fairly high
  • Dissociation energy of its molecule is fairly high
When ammonia is passed over heated CuO, it is oxidised to
  • N2
  • NO2
  • N2O
  • HNO2
What is the product of the reaction shown ?
Chemistry-Class 11 p Block Elements-2215.png
  • H2SO4
  • S
  • SO2
  • HNO2
Ammonium compound which on heating does not give NH3 is
  • (NH4)2SO4
  • (NH4)2CO3
  • NH4NO2
  • NH4Cl
Blasting of TNT is done by mixing
  • NH4Cl
  • NH4NO3
  • NH4NO2
  • (NH4)2SO4
The least acidic in the series of BF3, BCl3 and BBr3 is BF3 because
  • F is most electronegative
  • F has a small size
  • B3+ has a very small size
  • Back donation of electrons form F to B occurs
Which of the following statements about H3BO3 is not correct ?
  • It is a strong tribasic acid
  • It is prepared by acidifying an aqueous solution of borax
  • It has a layer structure in which planar BO3 units are joined by hydrogen bonds
  • It does not act as proton donor but acts as a Lewis acid by accepting hydroxyl ion
Three centred bond is present in
  • NH3
  • B2H6
  • BCl3
  • AlCl3
Which of the following combines with haemoglobin of the blood to form carboxyhaemoglobin ?
  • CO
  • CO2
  • O2
  • N2
On heating a mixture of NH4Cl and KNO3 we get
  • N2
  • NO
  • N2O
  • NO2
When a vapour, at atmospheric pressure was gradually heated from 25ºC its colour was found to deepen at first and then to fade as the temperature was raised above 160ºC. At 600ºC, the vapour was almost colourless, but its colour deepened when the pressure was raised at this temperature. The vapour was
  • The bromine
  • A mixture of nitrogen dioxide and dinitrogen tetroxide
  • Pure nitrogen dioxide
  • Pure dinitrogen tetroxide
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