MCQ - CHEMISTRY STD 8 Questions - Vidyadip

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16 questions · timed · auto-graded

MCQ 11 Mark

Choose the correct alternative. Carbon forms innumerable compounds becauseit has four electrons in its outermost shell. it behaves as a metal as well as a non $-$ metal. carbon atoms can form long chainsit combines with other elements to form covalent compounds.

A
it has four electrons in its outermost shell.
B
it behaves as a metal as well as a non- metal.
✓
carbon atoms can form long chains
D
it combines with other elements to form covalent compounds.

Answer

Correct option: C.

carbon atoms can form long chains

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MCQ 21 Mark

Choose the correct alternative. Diamond is used for

A
making the electrodes of electric furnaces.
B
making crucible for melting metals.
✓
cutting and drilling rocks and glass.
D
making carbon brushes for electric motors.

Answer

Correct option: C.

cutting and drilling rocks and glass.

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MCQ 31 Mark

Choose the correct alternative. Graphite is not found in

A
Bihar
✓
Maharashtra
C
Orissa
D
Rajasthan

Answer

Correct option: B.

Maharashtra

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MCQ 41 Mark

Choose the correct alternative. A crystalline form of carbon is

A
lampblack
B
gas carbon
C
sugar
✓
fullerene

Answer

Correct option: D.

fullerene

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MCQ 51 Mark

Choose the correct alternative. In combined state, carbon occurs as

A
coal
B
diamond
C
graphite
✓
petroleum

Answer

Correct option: D.

petroleum

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MCQ 61 Mark

Choose the correct alternative The purest form of the amorphous carbon is

A
wood charcoal
✓
sugar charcoal
C
bone charcoal
D
lampblack

Answer

Correct option: B.

sugar charcoal

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MCQ 71 Mark

Choose the correct alternative The process by which decayed plants slowly convert into coal is called.

A
petrification
✓
carbonisation
C
carbonification
D
fermentation

Answer

Correct option: B.

carbonisation

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MCQ 81 Mark

Choose the correct alternative Lamp black is

✓
an amorphous form of carbon
B
a crystalline form of carbon
C
a pure form of carbon
D
a cluster of carbon atoms

Answer

Correct option: A.

an amorphous form of carbon

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MCQ 91 Mark

Choose the correct alternative Destructive distillation of coal yields

A
coal tar
B
coal gas
C
coke
✓
all of the above

Answer

Correct option: D.

all of the above

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MCQ 101 Mark

Choose the correct alternative . Anthracite is

A
an inferior type of coal
✓
a superior type of coal
C
a cheapest form of coal
D
none of above

Answer

Correct option: B.

a superior type of coal

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MCQ 111 Mark

Fuel gases like water gas and producer gas are manufactured from

A
bone charcoal
B
wood charcoal
✓
coke
D
none of these

Answer

Correct option: C.

coke

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MCQ 121 Mark

Carbon has a great affinity for

A
sulphur
B
nitrogen
✓
oxygen
D
none of these

Answer

Correct option: C.

oxygen

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MCQ 131 Mark

Which form of carbon is a good conductor of electricity?

✓
graphite
B
diamond
C
coke
D
amorphous carbon

Answer

Correct option: A.

graphite

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MCQ 141 Mark

Which of the following is an amorphous form of carbon?

A
graphite
B
fullerenes
C
diamond
✓
coal

Answer

Correct option: D.

coal

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MCQ 151 Mark

Each molecule of Buckminster fulierene contains $60$ atoms of carbon arranged as balls consisting of $12$ pentagons and

✓
$20$ hexagons
B
$30$ hexagons
C
$40$ hexagons
D
$50$ hexagons

Answer

Correct option: A.

$20$ hexagons

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MCQ 161 Mark

Diamond and graphite are

A
metals
B
organic compounds
C
alkenes
✓
allotropes

Answer

Correct option: D.

allotropes

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MCQ - CHEMISTRY STD 8 Questions - Vidyadip