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

Related Mcqs:

1. 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

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

   A. Molecular addition compounds
   B. Molecular crystals
   C. Semiconductors
   D. Ionic compounds

3. Boron in soil has been considered micronutrient for_________________?

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

4. 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

5. The element of group VIA which is a non-metal is________________?

   A. S
   B. Se
   C. Te
   D. Po

6. The only non metal exists in liquid state is ___________?

   A. Mercury
   B. Bromine
   C. Phosphorus
   D. Iodine

   Submitted by: Aamir khan Hullio

7. 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

8. The metal which is used in thermite process because of its activity is____________________?

   A. iron
   B. copper
   C. aluminium
   D. zinc

9. Fruit juices and fizzy drinks such as lemonade are often sold in aluminium cans. What is the most important reason aluminium is a suitable metal ?

   A. aluminium can be recycled
   B. aluminium has very low density
   C. aluminium is the most abundant metal in the earth crust
   D. aluminium is resistant to corrosion by organic acids.

10. The oxidation number of central metal atom in [Ni(CO)4] is_________________?

    A. 0
    B. 2
    C. 4
    D. 6