Dry ice is from Chemistry The p-Block Elements

Previous Year Papers

Download Solved Question Papers Free for Offline Practice and view Solutions Online.

Test Series

Take Zigya Full and Sectional Test Series. Time it out for real assessment and get your results instantly.

Test Yourself

Practice and master your preparation for a specific topic or chapter. Check you scores at the end of the test.
Advertisement

 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


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


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


Advertisement
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


Advertisement

128.

Dry ice is

  • solid CO2

  • solid camphor

  • solid SO2

  • solid NO2


C.

solid SO2

Solid CO2 is called dry ice because it changes to vapour state directly without changing to liquid state.


Advertisement
Advertisement
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


Advertisement