Carbon and its Compounds Test

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Carbon and its Compounds Test - 14

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Weekly Quiz Competition

Question 1
1 / -0

Which of the following is not an allotropic form of carbon?

A
Fluorine

B
Fullerene

C
Diamond

D
Graphite

Solution

Fullerene, graphite and diamond all are different allotropes of carbon.
Fluorine is an entirely different element, whose atomic number is $$9$$. So fluorine is not an allotrope of carbon.
Option A is the correct answer.
Question 2
1 / -0

Which symbol is used for the element carbon?

A
$$C$$

B
$$Ca$$

C
$$Cn$$

D
$$Co$$

E
$$Cu$$

Solution

Elemental carbon is represented by $$ C $$.

$$Ca$$ is calcium, $$Cn$$ is copernicium, $$Co$$ is cobalt and $$Cu$$ is copper.

Hence, the correct option is A.
Question 3
1 / -0

Carbon atom is _______ .

A
monovalent

B
Divalent

C
Trivalent

D
Tetravalent
Question 4
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Which of the following is a saturated hydrocarbon?

A
$$C_2H_2$$

B
$$C_2H_4$$

C
$$C_2H_6$$

D
$$C_4H_4$$

E
$$C_6H_{10}$$

Solution

In chemistry, a saturated compound is a chemical compound that has a chain of carbon atoms linked together by single bonds. Alkanes $$(C_nH_{2n+2})$$ are saturated hydrocarbons.
In the given options only $$C_2H_6$$ is a saturated hydrocarbon as it is an alkane.
Question 5
1 / -0

Which of the following carbon compounds are linked by only single bonds between carbon atoms?

A
saturated sompounds

B
unsaturated compounds

C
hydrocarbons

D
none of these

Solution

The carbon compounds in which all the carbon atoms are linked by single bonds are called saturated compounds.

The carbon compounds which contain at least one double or triple bond are known as unsaturated compounds.

A hydrocarbon is an organic chemical compound composed exclusively of hydrogen and carbon atoms. Hence it contains unsaturated compounds of carbon, that contain at least one double or triple bond between the carbon atoms, as well as saturated carbon compound.
Question 6
1 / -0

Oils on treating with hydrogen in the presence of palladium or nickel catalyst form fats. This is an example of_________.

A
addition reaction

B
substitution reaction

C
displacement reaction

D
oxidation reaction

Solution

Hydrogenation of oils in presence of palladium or nickel catalyst to form fat is an addition reaction. During hydrogenation, vegetable oils are reacted with hydrogen gas at about $$60^\circ C$$. A nickel catalyst is used to speed up the reaction. The double bonds are converted to single bonds in the reaction. In this way unsaturated fats can be made into saturated fats – they are hardened.
Question 7
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The formation of chains by atoms of the same element is known as:

A
catenation

B
nitration

C
chelation

D
condensation

Solution

Catenation is the linkage of atoms of the same element into longer chains. Catenation occurs most readily in carbon, which forms covalent bonds with other carbon atoms to form longer chains and structures.
This is the reason for the presence of the vast number of organic compounds in nature.
Hence, option A is correct.
Question 8
1 / -0

A saturated hydrocarbon is shown by $${ C }_{ n }{ H }_{ 20 }$$ . The value of $$n$$ in this compound is:

A
$$18$$

B
$$10$$

C
$$9$$

D
$$8$$

Solution

Alkanes are saturated hydrocarbons with general formula $${C}_{n} {H}_{2n+2}$$.
So, if $$n=9$$ , then $$2n+2$$ is $$20$$
Hence, option $$C$$ is correct.
Question 9
1 / -0

Hydrogen chloride molecule contains:

A
covalent bond

B
ionic bond

C
co-ordinate covalent bond

D
vander waal bond

Solution

Hydrogen chloride ($$HCl$$) is a gas at atmospheric conditions. $$H-Cl$$ bond is a covalent bond. A covalent bond is a chemical bond that involves the sharing of electron pairs between atoms.
Question 10
1 / -0

The soap molecule has a :

A
hydrophilic head and a hydrophobic tail

B
hydrophobic head and a hydrophilic tail

C
hydrophobic head and a hydrophobic tail

D
hydrophilic head and a hydrophilic tail

Solution

The basic structure of all soaps is essentially the same, consisting of a long hydrophobic (water-fearing) hydrocarbon chain tail and a hydrophilic (water-loving) anionic head.

Hence the correct option is A.

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Re-Attempt Weekly Quiz Competition

Carbon and its Compounds Test - 14

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Carbon and its Compounds Test - 14

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SHARING IS CARING

Question 1

Fluorine

Fullerene

Diamond

Graphite

Solution

Question 2

$$C$$

$$Ca$$

$$Cn$$

$$Co$$

$$Cu$$

Solution

Question 3

monovalent

Divalent

Trivalent

Tetravalent

Question 4

$$C_2H_2$$

$$C_2H_4$$

$$C_2H_6$$

$$C_4H_4$$

$$C_6H_{10}$$

Solution

Question 5

saturated sompounds

unsaturated compounds

hydrocarbons

none of these

Solution

Question 6

addition reaction

substitution reaction

displacement reaction

oxidation reaction

Solution

Question 7

catenation

nitration

chelation

condensation

Solution

Question 8

$$18$$

$$10$$

$$9$$

$$8$$

Solution

Question 9

covalent bond

ionic bond

co-ordinate covalent bond

vander waal bond

Solution

Question 10

hydrophilic head and a hydrophobic tail

hydrophobic head and a hydrophilic tail

hydrophobic head and a hydrophobic tail

hydrophilic head and a hydrophilic tail

Solution

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