JEE Questions for Chemistry Class 11 P Block Elements Quiz 12 - MCQExams.com

Na+, Mg2+, Al3+ and Si4+ are isoelectronic, their ionic size will follow the order :
  • Na+ > Mg2+ < Al3+ < Si4+
  • Na+ > Mg2+ < Al3+ < Si4+
  • Na+ > Mg2+ > Al3+ >Si4+
  • Na+ < Mg2+ > Al3+ < Si4+
Which of the following shows bonds in silicones
  • Si – Si – Si – Si
  • Si – C – Si – O – Si
  • Si – C – Si – C – Si
  • – Si –O – Si – O – Si
Method used for obtaining highly pure silicon used as a semiconductor material, is
  • Oxidation
  • Electrochemical
  • Crystallization
  • Zone refining
Gun metal is an alloy of
  • Mg, Sn, Zn
  • Cu, Ni, Zn
  • Cu, Sn, Zn, Pb
  • Cu, Sb, Zn, Pb
The structure and hybridization of Si(CH3)4is
  • Bent, sp
  • Trigonal, sp2
  • Octahedral, d2 sp3
  • Tetrahedral, sp3
The ion that can be precipitated by HCl as well as H2 S is
  • Pb2+
  • Fe3+
  • Zn2+
  • Cu2+
Which of the following halides is least stable and has doubtful existence?
  • Cl4
  • GeI4
  • SnI4
  • PbI4
In laboratory, silicon can be prepared by the reaction of
  • SiO2 with Mg
  • By heating C in electric furnace
  • By heating potassium fluorosilicate with Potassium
  • None of these
Ge (II) compounds are powerful reducing agnets whereas Pb (IV) compounds are strong oxidants It can be due to
  • Pb is more electropositive than Ge
  • Ionization potential of lead is less than that of Ge
  • Ionic radii of Pb2+ and Pb4+ are larger than those of Ge2+ and Ge4+
  • More pronounced inert pair effect in lead than in Ge
Quartz is a crystalline variety of
  • Si
  • SiO2
  • Na2SiO3
  • SiC
An oxide of lead which is used in lead storage batteries, in safety matches and is a powerful oxidising agent is
  • PbO
  • PbO2
  • Pb3O4
  • 2PbO.PbO2
Which of the following sulphate is insoluble in water?
  • CuSO4
  • CdSO4
  • PbSO4
  • Bi2(SO4)3
The catenation tendency of C, Si and Ge is in the order Ge < Si < C. The bond energies (in kJ mol-1) of C – C, Si – Si and Ge – Ge bonds respectively are
  • 167,180, 348
  • 180, 167, 348
  • 348,167, 180
  • 348, 180, 167
Which of the following is most stable ?
  • Sn2+
  • Ge2+
  • Si2+
  • Pb2+
Which among CH4, SiH4 GeH4 and SnH4 is most volatile?
  • CH4
  • SiH4
  • GeH4
  • SnH4
Which of the following reactions occurs at the cathode during the charging of a lead storage battery?
  • Pb2+ + 2e- → Pb
  • 2)
    Chemistry-Class 11 p Block Elements-2313.png

  • Chemistry-Class 11 p Block Elements-2314.png

  • Chemistry-Class 11 p Block Elements-2315.png
Inert pair effect is exhibited by
  • Pb
  • B
  • Si
  • Al
Which of the following is not acidic ?
  • PCl3
  • SbCl3
  • BiCl3
  • CCl4
For making good quality mirrors, plates of flint glass are used. These are obtained by floating molten glass over a liquid metal which does not solidify before glass. The metal used can be
  • Tin
  • Sodium
  • Magnesium
  • Mercury
Which of the following is coloured ?
  • SnF4
  • SnCl4
  • SnBr4
  • SnI4
Quartz watches contain
  • A crystal of quartz as an essential component
  • A coating of quartz on the outer body
  • Hands made of quartz
  • Silica coated on the numbers
The correct increasing order of extent of hydrolysis in the following is
  • CCl4 < MgCl2 < AlCl3 < SiCl4 < PCl5
  • CCl4 < AlCl3 < MgCl2 < PCl5 < SiCl4
  • AlCl3 < MgCl2 < CCl4 < PCl5 < SiCl4
  • SiCl4 < MgCl2 < AlCl3 < PCl5 < CCl4
Which element-element bond has highest bond energy?
  • Sn – Sn
  • Ge – Ge
  • SiF4
  • Si – Si
Dry powder fire extinguisher contains
  • Sand
  • Sand and Na2CO3
  • Sand and baking soda
  • Sand and K2CO3
The first ionization enthalpy of aluminium is smaller than that of magnesium because
  • Atomic size of Al > Mg
  • Atomic size of Al < Mg
  • Al has one electron in the p-orbital
  • Atomic number of Al >Mg
Generally the atomic and ionic radii increase with increase in atomic number down the group . But the atomic size of aluminium and gallium is almost the same. This is because
  • The nuclear charge of Ga is higher than that of Al
  • Gallium contains inertvening d-electrons which do not screen the valence electrons effectively
  • The ionization enthalpies of Ga and Al are comparable
  • All the three above
In the commercial electrochemical process for Al extraction, the electrolyte used is
  • Al(OH)3 in NaOH solution
  • An aqueous solution of Al2(SO4)3
  • A molten mixture of Al2O3 and Na3AlF6
  • A molten mixture of AlO(OH) and Al(OH)3
Boron does not form B3+ ions whereas Al forms Al3+ ions. This is because
  • The size of B atom is smaller than that of Al
  • The sum of IE1+ IE2 +IE3 B is much higher than that of Al
  • The sum of IE1 + IE2 +IE3 of Al is much higher than that of B
  • Both (and (2)
The compound that is not a Lewis acid is
  • BF3
  • AlCl3
  • BeCl2.2H2O
  • SnCl4
The hydroxide of which of the following element is amphoteric
  • Al(OH)3
  • B(OH)3
  • In (OH)3
  • TIOH
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