12th Chemistry Monthly Test - 3 ( p-Block Elements-I )

St. Britto Hr. Sec. School - Madurai

12th Chemistry Monthly Test - 3 ( p-Block Elements-I )-Aug 2020

Time : 2.30 Hours

Part - A

Generic 2 - Answer All Question

What are the uses of silicon tetra chloride?

What is catenation ? describe briefly the catenation property of carbon

Among group 14 elements, name
(i) the most electro negative element
(ii) the most metallic element

What is tetraethoxy silane? How is it obtained?

What is water gas equilibrium?

Starting from Sicl₄, prepare the following in steps not exceeding the number given in parentheses.
(i) Silicon
(ii) Linear silicon containing methyl groups only
(iii) Na₂SiO₃

What are the uses of boron trifluoride?
Boron does not react directly with hydrogen. Suggest one method to prepare diborane from BF₃.

What is inert pair effect?

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

What is oxo process?
What are alums?

Name the two important ores of Boron.

(i) Silicones are used for making waterproof fabrics. Give reason.
(ii) Diamond - bad conductor of electricity.

Draw the structure of borazole B₃N₃H₆.

Give the formula of chlorosilazanes. Explain its preparation from SiCI₄.

What is phosgene? How is it prepared?

Part - B

Generic 3 - Answer All Question

Find out the oxidation state of carbon in each of the following:
(i) CaC₂
(ii) H₂CO₃
(iii) HCN
(iv) CO

Describe the structure of carbon nanotubes.
Complete the following reactions
a.\(B(OH)+NH_{ 3 }+NH\longrightarrow \)
b.\(Na_{ 2 }B_{ 2 }{ O }_{ 7 }+{ { H }_{ 2 }{ SO }_{ 4 }+{ H }_{ 2 }O\longrightarrow }\)
c.\({ B }_{ 2 }{ H }_{ 6 }+2NaOH+2{ H }_{ 2 }O\longrightarrow \)
d.\({ B }_{ 2 }{ H }_{ 6 }+{ CH }_{ 3 }OH\longrightarrow \)
e.\({ BF }_{ 3 }+9{ H }_{ 2 }O\longrightarrow \)
f.\(HCOOH+{ H }_{ 2 }{ SO }_{ 4 }\)
g.\(SiCl_{ 4 }+{ C }_{ 2 }{ H }_{ 5 }OH\longrightarrow \)
h.\(SiCl_{ 4 }+{ NH }_{ 3 }\longrightarrow \)
i.\(B+NaOH\longrightarrow \)
j.\({ H }_{ 2 }{ B }_{ 4 }{ O }_{ 7 }\overset { Red\quad hot }{ \rightarrow } \)

AlCl₃behaves like a lewis acid. Substantiate this statement.

How is aluminium chloride prepared by McAfee process?

Describe the structure of graphite.

Describe the structure of diamond.

Describe the structure of diborane

Write a note on metallic nature of p-block elements

Give one example for each of the following
(i) icosogens
(ii) tetragen
(iii) prictogen
(iv) chalcogen

Give 3 uses of carbon monoxide.

Part - C

Generic 5 - Answer All Question

Distinguish between diamond and graphite.

CO is a reducing agent . justify with an example.
How will you identify borate radical?

How will you convert boric acid to boron nitride?

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

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.

Write a note on zeolites.

A hydride of 2^nd period alkali metal (A) on reaction with compound of Boron (B) to give a reducing agent (C). identify A , B and C.

What are the various methods by which carbon-di-oxide is prepared?

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12th Chemistry Monthly Test - 3 ( p-Block Elements-I )

St. Britto Hr. Sec. School - Madurai

12th Chemistry Monthly Test - 3 ( p-Block Elements-I )-Aug 2020

Part - A

Generic 2 - Answer All Question

What are the uses of silicon tetra chloride?

What is catenation ? describe briefly the catenation property of carbon

Among group 14 elements, name (i) the most electro negative element (ii) the most metallic element

What is tetraethoxy silane? How is it obtained?

What is water gas equilibrium?

Starting from Sicl4, prepare the following in steps not exceeding the number given in parentheses. (i) Silicon (ii) Linear silicon containing methyl groups only (iii) Na2SiO3

What are the uses of boron trifluoride?

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

What is inert pair effect?

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

What is oxo process?

What are alums?

Name the two important ores of Boron.

(i) Silicones are used for making waterproof fabrics. Give reason. (ii) Diamond - bad conductor of electricity.

Draw the structure of borazole B3N3H6.

Give the formula of chlorosilazanes. Explain its preparation from SiCI4.

What is phosgene? How is it prepared?

Part - B

Generic 3 - Answer All Question

Find out the oxidation state of carbon in each of the following: (i) CaC2 (ii) H2CO3 (iii) HCN (iv) CO

Describe the structure of carbon nanotubes.

AlCl3 behaves like a lewis acid. Substantiate this statement.

How is aluminium chloride prepared by McAfee process?

Describe the structure of graphite.

Describe the structure of diamond.

Describe the structure of diborane

Write a note on metallic nature of p-block elements

Give one example for each of the following (i) icosogens (ii) tetragen (iii) prictogen (iv) chalcogen

Give 3 uses of carbon monoxide.

Part - C

Generic 5 - Answer All Question

Distinguish between diamond and graphite.

CO is a reducing agent . justify with an example.

How will you identify borate radical?

How will you convert boric acid to boron nitride?

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

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.

Write a note on zeolites.

A hydride of 2nd period alkali metal (A) on reaction with compound of Boron (B) to give a reducing agent (C). identify A , B and C.

What are the various methods by which carbon-di-oxide is prepared?

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Among group 14 elements, name
(i) the most electro negative element
(ii) the most metallic element

Starting from Sicl₄, prepare the following in steps not exceeding the number given in parentheses.
(i) Silicon
(ii) Linear silicon containing methyl groups only
(iii) Na₂SiO₃

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

(i) Silicones are used for making waterproof fabrics. Give reason.
(ii) Diamond - bad conductor of electricity.

Draw the structure of borazole B₃N₃H₆.

Give the formula of chlorosilazanes. Explain its preparation from SiCI₄.

Find out the oxidation state of carbon in each of the following:
(i) CaC₂
(ii) H₂CO₃
(iii) HCN
(iv) CO

AlCl₃behaves like a lewis acid. Substantiate this statement.

Give one example for each of the following
(i) icosogens
(ii) tetragen
(iii) prictogen
(iv) chalcogen

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.

A hydride of 2^nd period alkali metal (A) on reaction with compound of Boron (B) to give a reducing agent (C). identify A , B and C.