Silicon differ from silica by a group of__________________?

Related Mcqs:

1. In network of silica (SiO2) each silicon atom is surrounded by _____________ atoms of osygen?

   A. 4
   B. 2
   C. 1
   D. 6

2. Which of the following is not a use of silicon ?

   A. Lubricants
   B. Hydraulic brakes
   C. Antifreeze
   D. Water repellent

3. Silica gel and alumina are used as __________________?

   A. Mobile phase
   B. Stationary phase
   C. Mixed phase
   D. Single phase

4. Isotopes differ in_________________?

   A. properties which depend upon mass
   B. arrangement of electrons in orbitals
   C. chemical properties
   D. all of the above

5. Melting points of VII-A group elements down the group ____________________?

   A. Increase
   B. Decrease
   C. Remain constant
   D. No regular trend

6. In solids the temperature is the measure of__________________?

   A. Average kinetic energy of molecules
   B. Vibrational kinetic energy
   C. Translational kinetic energy
   D. None of the above

7. The quantity of heat required to convert one mole of liquid into its vapours at its boiling point is called molar heat of__________________?

   A. vaporization
   B. evaporation
   C. crystallization
   D. sublimation

8. Bucky balls is an allotropic from of__________________?

   A. Sulphur
   B. Carbon
   C. Silica
   D. Tin

9. Pi bonds are produced by overlapping of__________________?

   A. Un-hybrid orbitals
   B. Hybrid orbitals
   C. Hybrid and un hybrid orbitals
   D. atomic orbital and hybrid orbital

10. In diaphragm cell hydrogen is discharged by the reduction of__________________?

    A. Water
    B. HCI
    C. Na+
    D. NaCl