In diborane, the number of electrons that accounts for banana bonds is ________.

The element that does not show catenation among the following p-block elements is ________.

The repeating unit in silicone is_______.

The geometry at which carbon atom in diamond are bonded to each other is _______.

AlF₃ is soluble in HF only in the presence of KF. It is due to the formation of _________.

Describe briefly allotropism in p- block elements with specific reference to carbon.

Boron does not react directly with hydrogen. Suggest one method to prepare diborane from BF₃.

Explain the formation of boron trifluoride.

Mention the physical properties of boranes.

What are the uses of boron trifluoride?

Complete the following reactions.
a. \(B(OH)_3 + NH_3\longrightarrow \)
b. \(Na_{ 2 }B_{ 4 }{ O }_{ 7 }+{ { H }_{ 2 }{ SO }_{ 4 }+{ 5H }_{ 2 }O\longrightarrow }\)
c. \({ B }_{ 2 }{ H }_{ 6 }+2NaOH+2{ H }_{ 2 }O\longrightarrow \)
d. \({ B }_{ 2 }{ H }_{ 6 }+6{ CH }_{ 3 }OH\longrightarrow \)
e. \(4{ BF }_{ 3 }+3{ H }_{ 2 }O\longrightarrow \)
f. \(HCOOH+{ H }_{ 2 }{ SO }_{ 4 }\longrightarrow \)
g. \(2SiCl_{ 4 }+NH\)₃
h. SiCl₄ + 4C₂H₅OH \(\rightarrow\)
i. 2\(B+6NaOH\longrightarrow \)
j. \({ H }_{ 2 }{ B }_{ 4 }{ O }_{ 7 }\overset { Red\ hot }{ \rightarrow } \)

How is aluminum chloride prepared from aluminum?

Give 3 uses of aluminium chloride

Describe the structure of graphite.

How is CO₂ manufactured?

How will you convert boric acid to boron nitride?

A double salt which contains fourth period alkali metal (A) on heating at 500K gives (B). Aqueous solution of (B) gives white precipitate with BaCl₂ and gives a red colour compound with alizarin. Identify A and B.

How are silicates classified? Give an example for each type of silicate.

Distinguish between diamond and graphite.