One of the outstanding features of boron is its ability to form__________________?

Related Mcqs:

1. The molecules of CO2 in dry ice form__________________?

   A. Ionic crystal
   B. Covalent crystal
   C. Molecular crystal
   D. Any type of crystal

2. Boron is non metal while other elements of IIIA group are metals. This is because______________?

   A. it has small size
   B. it has high nuclear charge
   C. it forms molecular addition compounds
   D. all of the above

3. Boron is non-netal whereas A1 is metal. It is due to_______________________?

   A. Small size
   B. High nuclear charge
   C. Both A and B
   D. No authorized justification yet

4. Boron in soil has been considered micronutrient for_________________?

   A. Soil porocity
   B. Proper growth of plants
   C. Alkalinity of soil
   D. All

5. The type of hybridisation of boron in diborane is______?

   A. Sp- hybridisation
   B. Sp2- hybridisation
   C. Sp3- hybridisation
   D. Sp3d2- hybridisation

   Submitted by: Muhammad Ali Kunbhar

6. Because of its ability to combine with both oxygen and nitrogen aluminium metal is used_____________?

   A. As nitrometer
   B. To remove air bubbles from molten metal
   C. To produce alloy
   D. As insulator

7. Special features of borate glass is that it is_________________?

   A. Heat resistant
   B. Low melting
   C. Used to prepare chemical garden
   D. Green in colour

8. 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

9. When 0.01 moles of NaOH are added to a buffer solution, its PH changes from 4.745 to 4.832. What is its?

   A. 0.115
   B. 0.900
   C. 0.015
   D. 0.215

   Submitted by: Muhammad Ali Kunbhar

10. If temperature of gallium arsenide is increased then its conductivity will___________________?

    A. decrease
    B. increase
    C. remains constant
    D. first decreases then increases