The catenation tendency of C, Si and Ge is in the order Ge < S

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 Multiple Choice QuestionsMultiple Choice Questions

121.

Name the type of the structure of silicate in which one oxygen atom of [SiO4]4- is shared?

  • Sheet silicate

  • Pyrosilicate

  • Three dimensional silicate

  • Linear chain silicate


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122.

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

  • 348, 167, 180

  • 348, 180, 167

  • 167, 180, 348

  • 180, 167, 348


B.

348, 180, 167

Catenation tendency decreases with the decrease in M-M bond energy. Thus, bond energies of C-C, Si-Si and Ge-Ge must be 348, 180 and 167 kJ mol-1 respectively.


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123.

Number of oxygen atoms shared per SiO44- tetrahedron in

I. two dimensional sheet structured silicates

II. cyclic silicates and

III. single strand chain silicates respectively are

  • 3, 3, 2

  • 3, 2, 2

  • 4, 3, 1

  • 4, 3, 2


124.

Red lead is

  • PbO

  • PbO2

  • Pb3O4

  • Pb2O3


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125.

Which will liberate bromine from a solution of potassium bromide?

  • I2

  • Cl2

  • SO2

  • HI


126.

SiO2 is reacted with sodium carbonate. What is the gas liberated ?

  • CO

  • O2

  • CO2

  • O3


127.

Pure silicon doped with phosphorus is a 

  • metallic conductor

  • insulator

  • n-type semiconductor

  • p-type semiconductor


128.

Dry ice is

  • solid CO2

  • solid camphor

  • solid SO2

  • solid NO2


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129.

Which of the following is the electron deficient molecule?

  • PH3

  • SiH4

  • C2H6

  • B2H6


130.

Which of the following compounds is carbondum?

  • Al2O3

  • SiO2

  • SiC

  • SnO2


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