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

Related Mcqs:

1. 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

2. Which electronic configuration corresponds to an element of group IIIA ?

   A. 1s2 2s2 2p3
   B. 1s2 2s2 2p6 3s2 3p1
   C. 1s2 2s2 2p4
   D. 1s2 2s2 2p6 3s2 3p6 4s2 3d1

3. Which of following metals can be displaced by all other metals from its solution ?

   A. Ag
   B. A
   C. Au
   D. Cu

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

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

5. Boron in soil has been considered micronutrient for_________________?

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

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

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

7. A elements are named as alkali metals because_______________?

   A. Their oxides are basic
   B. Their oxide and hydroxides are water soluble
   C. Both A & B
   D. They are found in earth

8. First ionization potential of alkaline earth metal is greater than alkali metals because___________________?

   A. They are more reactive
   B. They have greater atomic radii
   C. They have smaller atomic sizes
   D. All

9. 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

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

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