p- block elements

Name:

class : I BBC / I GMC

Mobile No.

1. Diborane contains

• 2 bridge bonds
• 4 bridge bonds
• 6 bridge bonds
• 5 bridge bonds

2. Which of the following is Phoshphonitrilic halide?

• PCl5
• (PNCl2)3
• PCl3
• P2O5

3. The shape of IF7 is

• T-Shape
• Planar
• Square pyramidal
• Pentagonal bipyramidal

4. B3N3H6 is

• Borazine
• Borazole
• Inorganic benzene
• All

5. General formula of silicones

• -(R2SiO)n-
• -(RSiO)n-
• -(R3SiO)n-
• -(R2SiO2)n-

6. What is the first step in the preparation of silicones

• preparation of silanols
• preparation of dialkyl or diaryl silicon halides
• polymerization of silanols
• Hydrolysis of intermediate

7. Phospham is prepared from

• Phosphonitrilic halides
• silicones
• borazole
• diborane