St. Britto Hr. Sec. School - Madurai
12th Chemistry Monthly Test - 3 ( p-Block Elements-I )-Aug 2020
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What is inert pair effect?
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Describe briefly allotropism in p- block elements with specific reference to carbon
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What is oxo process?
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What are alums?
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Name the two important ores of Boron.
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(i) Silicones are used for making waterproof fabrics. Give reason.
(ii) Diamond - bad conductor of electricity. -
Draw the structure of borazole B3N3H6.
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Give the formula of chlorosilazanes. Explain its preparation from SiCI4.
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What is phosgene? How is it prepared?
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Find out the oxidation state of carbon in each of the following:
(i) CaC2
(ii) H2CO3
(iii) HCN
(iv) CO -
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Describe the structure of carbon nanotubes.
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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.\({ H }_{ 2 }{ B }_{ 4 }{ O }_{ 7 }\overset { Red\quad hot }{ \rightarrow } \)
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AlCl3 behaves like a lewis acid. Substantiate this statement.
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How is aluminium chloride prepared by McAfee process?
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Describe the structure of graphite.
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Describe the structure of diamond.
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Describe the structure of diborane
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Write a note on metallic nature of p-block elements
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Give one example for each of the following
(i) icosogens
(ii) tetragen
(iii) prictogen
(iv) chalcogen -
Give 3 uses of carbon monoxide.
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Distinguish between diamond and graphite.
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CO is a reducing agent . justify with an example.
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How will you identify borate radical?
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How will you convert boric acid to boron nitride?
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How are silicates classified? Give an example for each type of silicate.
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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.
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Write a note on zeolites.
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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.
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What are the various methods by which carbon-di-oxide is prepared?