CARBON AND ITS COMPOUNDS1

Draw

Write the electronic configuration of carbon

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is the ability of a substance to exist in various forms in the same physical states.

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Carbon atoms are arranged in a ------- , each carbon atom is joined to four other carbon atoms by strong covalent bond resulting in a 3- dimensional giant (macro) molecule which has a network of octahedral structure.

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Carbon atoms are arranged in parallel layers, each carbon atom is covalently bonded to three other atoms to produce an infinite two ---------- flat hexagonal layer structure which are held together by weak van der waals attractive forces.

Multiple Choice

Carbon belongs to which group on the periodic table?

• Group II

• Group III

• Group IV

• Group V

Multiple Choice

What is the atomic number of carbon?

• 4

• 6

• 8

• 12

Multiple Choice

Which of the following is a pure, naturally occurring form of carbon?

• Coal

• Charcoal

• Diamond

• Crude oil

Multiple Choice

The ability of an element to exist in more than one form in the same physical state is called:

• Isomerism

• Polymerization

• Allotropy

• Isomorphism

Multiple Choice

In diamond, each carbon atom is bonded to how many other carbon atoms?

• Two

• Three

• Four

• Six

Multiple Choice

The layers of carbon atoms in graphite are held together by:

• Strong covalent bonds

• Ionic bonds

• Metallic bonds

• Weak van der Waals forces

Multiple Choice

Which of the following is a physical property of diamond?

• Soft and black

• Conducts electricity

• Hard and colourless

• Low melting point

Multiple Choice

Graphite conducts electricity due to the presence of:

• Strong covalent bonds

• Mobile electrons

• A giant molecular structure

• High density

Multiple Choice

Due to its hardness, diamond is commonly used for:

• Making pencil lead

• As a dry lubricant

• Cutting glasses

• As black pigment in paints

Multiple Choice

Graphite is mixed with clay to make:

• Electrodes

• Crucibles

• Gemstones

• Pencil lead

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Wood charcoal can be obtained by burning wood in the absence of -------

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It is the ----- form of charcoal.

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It is used to ----- gases and to remove colors from colored solutions.

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It is also known as -------- charcoal

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---

---

-- is obtained when gaseous or liquid hydrocarbon fuels such as bottled cooking gas or when kerosene is burned in a limited supply of air.

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This is obtained when natural gas, mainly -----, is burned in an inadequate supply of air.

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Coke is obtained when coal is heated in the absence of air, a porous dark gray solid which is used as fuel and in the ----- of metals.

Multiple Choice

What is the electronic configuration of carbon?

• 1s²2s²2p¹

• 1s²2s²2p²

• 1s²2s¹2p³

• 1s²2s²2p³

Multiple Choice

Which of the following is NOT a natural form of pure carbon?

• Diamond

• Graphite

• Coal

• Both diamond and graphite

Multiple Choice

What is allotropy?

• The ability of a substance to change its chemical composition

• The existence of an element in different physical states

• The ability of a substance to exist in various forms in the same physical state

• The process of carbon formation

Multiple Choice

In diamond's structure, how many carbon atoms is each carbon atom bonded to?

• Two

• Three

• Four

• Five

Multiple Choice

What type of force holds the layers of graphite together?

• Ionic bonds

• Covalent bonds

• Van der Waals forces

• Metallic bonds

Multiple Choice

Why does graphite conduct electricity while diamond does not?

• Because graphite has a higher density

• Because graphite has mobile electrons

• Because graphite has a lower melting point

• Because graphite is softer

Multiple Choice

Which property is NOT characteristic of diamond?

• Hard

• Transparent

• Good conductor of electricity

• High refractive index

Multiple Choice

What makes graphite suitable for use as a lubricant?

• Its high melting point

• Its ability to conduct electricity

• Its layers can slide over each other

• Its black color

Multiple Choice

Which form of carbon is used in gas masks?

• Diamond

• Graphite

• Wood charcoal

• Carbon black

Multiple Choice

What is the purest form of charcoal?

• Wood charcoal

• Sugar charcoal

• Animal charcoal

• Lamp black

Multiple Choice

What is produced when carbon burns in excess air?

• Carbon monoxide

• Carbon dioxide

• Carbon tetrachloride

• Carbon disulfide

Multiple Choice

Which type of carbon is used in making pencil lead?

• Diamond

• Graphite

• Lamp black

• Carbon black

Multiple Choice

 What is producer gas composed of?

• CO and H₂

• CO and N₂

• CO₂ and N₂

• CO₂ and H₂

Multiple Choice

Which form of carbon is used for decolorizing solutions?

• Sugar charcoal

• Wood charcoal

• Animal charcoal

• Carbon black

Multiple Choice

 What is formed when calcium reacts with carbon?

• Calcium oxide

• Calcium carbonate

• Calcium carbide

• Calcium hydroxide

Multiple Choice

What happens when coke reacts with steam?

• Producer gas is formed

• Water gas is formed

• Carbon dioxide is formed

• Carbon monoxide is formed

Multiple Choice

Which of these is NOT a use of carbon black?

• In printer's ink

• In rubber manufacturing

• In gas masks

• In shoe polish

Multiple Choice

What is the density of diamond?

• 2.3 g/cm³

• 3.5 g/cm³

• 4.5 g/cm³

• 5.3 g/cm³

Multiple Choice

How is activated charcoal produced?

• By burning wood in excess air

• By treating wood charcoal with steam

• By heating sugar in absence of air

• By burning animal bones

Multiple Choice

Which reaction occurs when carbon reduces hot concentrated H₂SO₄?

• Only CO₂ is produced

• Only SO₂ is produced

• CO₂, SO₂, and H₂O are produced

• Only H₂O is produced