JEE Questions for Chemistry Class 11 P Block Elements Quiz 4 - MCQExams.com

Graphite is a soft solid lubricant extremely difficult to melt. The reason for this anomalous behaviour is that, graphite
  • is a non-crystalline substance
  • is an allotropic form of diamond
  • has molecules of variable molecular masses like polymers
  • has carbon atoms arranged in large plates of rings of strongly bound carbon atoms with weak interplate bonds
Which of the following is used in making printer's ink, shoe polish, black varnish and paint ?
  • Lamp black
  • Bone black
  • Carbon black
  • None of these
Calorific value of producer gas is low because of
  • high per cent of N2
  • low per cent of CO2
  • high per cent of CO
  • low per cent of N2

Chemistry-Class 11 p Block Elements-2117.png

  • Chemistry-Class 11 p Block Elements-2118.png
  • 2)
    Chemistry-Class 11 p Block Elements-2119.png

  • Chemistry-Class 11 p Block Elements-2120.png

  • Chemistry-Class 11 p Block Elements-2121.png
A metal, M forms chlorides in its + 2 and + 4 oxidation states. Which of the following statements about these chlorides is correct ?
  • MCl2 is more volatile than MCl4
  • MCl2 is more soluble in the anhydrous ethanol than MCl4
  • MCl2 is more ionic than MCl4
  • MCl2 is more easily hydrolysed than MCl4
The composition of the common glass is

  • Chemistry-Class 11 p Block Elements-2122.png
  • 2)
    Chemistry-Class 11 p Block Elements-2123.png

  • Chemistry-Class 11 p Block Elements-2124.png

  • Chemistry-Class 11 p Block Elements-2125.png
Addition of SnCl2 to HgCl2 gives precipitate
  • white turning to red
  • white turning to grey
  • black turning to white
  • None of these

Chemistry-Class 11 p Block Elements-2126.png

  • Chemistry-Class 11 p Block Elements-2127.png
  • 2)
    Chemistry-Class 11 p Block Elements-2128.png

  • Chemistry-Class 11 p Block Elements-2129.png

  • Chemistry-Class 11 p Block Elements-2130.png
Name of structure of silicates in which three oxygen atoms of [ SiO4]4- are shared is
  • pyrosilicate
  • sheet silicate
  • linear chain silicate
  • three dimensional silicate
When tin is treated with concentrated nitric acid
  • it is converted into stannous nitrate
  • it is converted into stannic nitrate
  • it is converted into metastannic acid
  • it becomes passive
The tendency for catenation in group 14 elements varies in the order
  • C >> Si > Ge = Sn > Pb
  • C << Si < Ge = Sn < Pb
  • C >> Si < Ge < Sn < Pb
  • C >> Si = Ge = Sn > Pb
The thermal stability of CF4 is
  • less than SiF4
  • more than SiF4
  • less than CCl4
  • less than SiCl4
Which of the following is not correct ?
  • SiO2 is used as acidic flux
  • The distance between the layers in graphite is 3.35 × 10-3 cm
  • SiO2 reacts with Na2 CO3 and liberates CO
  • The hybridisation of C in graphite is sp2
On controlled hydrolysis and condensation, R3 SiCl yields

  • Chemistry-Class 11 p Block Elements-2132.png
  • 2)
    Chemistry-Class 11 p Block Elements-2133.png

  • Chemistry-Class 11 p Block Elements-2134.png

  • Chemistry-Class 11 p Block Elements-2135.png
The most probable oxidation state of an element with the electronic configuration of 1s22s22p63s23p1 is
  • +1
  • +2
  • +3
  • -1
Group 13 elements exhibit
  • Only + 3 oxidation state
  • Only + 1 oxidation state
  • Both + 1 and +3 oxidation states
  • + 1, +2 and +3 oxidation states.
Which of the following does not react with water ?
  • Al
  • Na
  • TI
  • B
Which out of the following compounds give Cl2 above 40oC
  • BCl3
  • AlCl3
  • TICl3
  • None of these
Which of the following reactions takes place at the cathode in the electrolytic cell used for extraction of aluminum from alumina?

  • Chemistry-Class 11 p Block Elements-2136.png
  • 2)
    Chemistry-Class 11 p Block Elements-2137.png

  • Chemistry-Class 11 p Block Elements-2138.png

  • Chemistry-Class 11 p Block Elements-2139.png
The method used for refining of aluminium is
  • Hoope’s electrolytic process
  • Hall’s process
  • Baeyer’s process
  • Serpeck’s process
Name the process used for purification of white bauxite ore containing no iron oxide as impurity
  • Baeyer’s process
  • Hall’s process
  • Serpeck’s process
  • Hoope’s electrolytic process
Alums are not formed by

  • Chemistry-Class 11 p Block Elements-2141.png
  • Na+
  • Li+
  • Rb+
Which of the following reactions does not take place?
  • 4Al + 3O2 → 2Al2O3
  • 8Al + 3Mn3O4 → 4Al2O2 + 9Mn
  • 2Al + Fe2O3 → Al2O3 + 2Fe
  • Al2O3 + Cr → Cr2O3 + 2Al
Which of the statements about anhydrous AlCl3 is correct?
  • It exists as AlCl3 molecule
  • It is not easily hydrolysed
  • It sublimes at 100oC under vacuum
  • It is a strong Lewis base
Duraluminium is an alloy of
  • Al and Mg
  • Al, Mg and Ni
  • Al,Mg,Mn and Cu
  • Al and Ni
Which of the following statements is not true both for B and Al ?
  • They burn in oxygen to give oxides at high temperature
  • Their halides are Lewis acids
  • They combine with nitrogen to form nitrides
  • They react with HCl to form chlorides,
Which one of the following is strongest Lewis acid?
  • BF3
  • BCl3
  • BBr3
  • BI3
An example of a double salt is
  • Bleaching powder
  • K4[Fe(CN)6
  • Hypo
  • Potash alum
The chemical formula of bauxite is
  • Al2O3
  • Al2O3.2H2O
  • Na3AlF4
  • Al2Cl6
Anhydrous AlCl3 is prepared from
  • Conc. HCl and aluminium metal
  • Aluminium and Cl2
  • Dry HCl gas and heated aluminium metal
  • Dilute HCl and alumininum metal
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