Carbon and its Compounds Test

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Carbon and its Compounds Test - 22

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Weekly Quiz Competition

Question 1
1 / -0

The main reasons for the huge number of organic compounds are :

A
catenation property of carbon

B
tetravalency of carbon

C
tendency of carbon to form multiple bonds

D
all of these
Solution
- Properties of carbon responsible for huge number of organic compounds:
- Tetravalency - It has a valency of four. So, one carbon atom can bond with four other atoms or form four bond.
- Catenation - Carbon atom can form bond with other carbon atoms, they can for long chains of C atoms.
Due to these factors carbon will bond with anything and everything with four others at once.
Question 2
1 / -0

Crystalline fullerene has __________ properties.

A
semiconducting

B
insulating

C
both $$A$$ and $$B$$

D
none of these

Solution

Fullerene is an allotrope of carbon in the form of hollow sphere and called as buckyballs. $$C-60$$ is the crystalline form and is used as semiconductor.
Question 3
1 / -0

Which of the following does not belong to homologous series of alkanes?

A
$$C_2H_6$$

B
$$C_3H_4$$

C
$$C_4H_{10}$$

D
$$C_5H_{12}$$

Solution

Alkanes have the general formula $$C_{n}H_{2n+2}$$.

Thus, $$C_{3}H_{4}$$ does not belong to homologous series of alkanes.
Question 4
1 / -0

The general formula for saturated hydrocarbons is :

A
$$C_nH_{2n+2}$$

B
$$C_nH_{2n}$$

C
$$C_nH_{2n-2}$$

D
$$C_nH_{2n-n}$$

Solution

General formula of alkanes is $${ C }_{ n }{ H }_{ 2n+2 }$$, where n is the no. of carbon atoms.
Question 5
1 / -0

In order to form branching, a saturated organic compound must have a minimum of:

A
four carbon atoms

B
three carbon atoms

C
five carbon atoms

D
any number of carbon atoms

Solution

In order to form branching, a saturated organic compound must have a minimum of four carbon atoms.
Question 6
1 / -0

The most common fullerene is $$C_{60}$$. 60 carbon atoms are arranged in ______ pentagons and ______ hexagons.

A
$$12, 20$$

B
$$16, 26$$

C
$$12, 40$$

D
$$16, 40$$

Solution

60 carbon atoms are joined together by single and double bonds to form a hollow sphere with 12 pentagonal and 20 hexagonal faces, a design that resembles a football.
Question 7
1 / -0

Chemically, diamond is:

A
a mixture of metal carbonates

B
pure carbon

C
a pure form of sand

D
a mixture of calcium and magnesium phosphates

Solution

Diamond is an allotrope of carbon and it is present in pure form since it contains carbon atoms bonded to each other.
Question 8
1 / -0

Which of the following statement is true for graphite?
(a) In graphite, each carbon atom is bonded to four other carbon atoms.
(b) Graphite is very hard.
(c) It is a good conductor of electricity.
(d) It is a bad conductor of electricity.

A
a, b and d

B
only c

C
a and d

D
a and c

Solution

(a) In graphite, each carbon atom is bonded to three other carbon atoms.
(b) Graphite is soft and slippery.
(c) In, graphite only three out of four outer shell electrons form a covalent bond, thus leaving one free electron. These delocalized electrons can move freely and conduct electricity. Thus graphite is a good conductor of electricity. Thus out of the given statement only, statement C is correct.
Hence option B is the correct answer.
Question 9
1 / -0

The long hydrocarbon chain in soap is water-repelling (hydrophobic), which is called:

A
polar tail

B
ring chain

C
non-polar tail

D
none of the above
Question 10
1 / -0

Which of the following is used in making printer ink, shoe polish, and black varnish?

A
Lamp black

B
Bone black

C
Carbon black

D
None of the above

Solution

Lampblack is a type of carbon black obtained from the soot of burned fat, oil, tar, or resin. Lampblack is a soft brownish or bluish-black pigment that is very stable and unaffected by light, acids, and alkalies. Lampblack is used for all these purposes. Carbon black is used in making tires. Bone black is used for the decolorization of sugar.

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Re-Attempt Weekly Quiz Competition

Carbon and its Compounds Test - 22

Result

Carbon and its Compounds Test - 22

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SHARING IS CARING

Question 1

catenation property of carbon

tetravalency of carbon

tendency of carbon to form multiple bonds

all of these

Solution

Question 2

semiconducting

insulating

both $$A$$ and $$B$$

none of these

Solution

Question 3

$$C_2H_6$$

$$C_3H_4$$

$$C_4H_{10}$$

$$C_5H_{12}$$

Solution

Question 4

$$C_nH_{2n+2}$$

$$C_nH_{2n}$$

$$C_nH_{2n-2}$$

$$C_nH_{2n-n}$$

Solution

Question 5

four carbon atoms

three carbon atoms

five carbon atoms

any number of carbon atoms

Solution

Question 6

$$12, 20$$

$$16, 26$$

$$12, 40$$

$$16, 40$$

Solution

Question 7

a mixture of metal carbonates

pure carbon

a pure form of sand

a mixture of calcium and magnesium phosphates

Solution

Question 8

a, b and d

only c

a and d

a and c

Solution

Question 9

polar tail

ring chain

non-polar tail

none of the above

Question 10

Lamp black

Bone black

Carbon black

None of the above

Solution

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