Carbon and its Compounds Test

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Carbon and its Compounds Test - 25

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Weekly Quiz Competition

Question 1
1 / -0

Which of the following types of forces bind together the carbon atoms in diamond?

A
Van der Waal's forces

B
Ionic

C
Covalent

D
Dipolar

Solution

Diamond is a covalent crystal. In diamonds, each carbon atom is $$sp^3$$ hybridized and strongly bonded to four adjacent carbon atoms located at the apices of a tetrahedron (a three-sided pyramid). The four valence electrons of each carbon atom participate in the formation of very strong covalent bonds. These bonds have the same strength in all directions. This gives diamonds their great hardness.
Question 2
1 / -0

Given compounds: propyne, acetylene, butane, butanol, propene, ethane, and ethene. How many of these compounds are unsaturated?

A
7

B
4

C
5

D
6

Solution

Unsaturated compounds have double or triple bonds in their structures.
Propyne- Triple bond
Acetylene-Triple bond
Propene- Double bond
Ethene-Double bond
Butane, butanol, and ethane have single bonds, hence are saturated compounds.
So, the correct option is B.
Question 3
1 / -0

Generally, non-metals are not good conductors of electricity.
Which of the following is a good conductor of electricity?

A
Diamond

B
Graphite

C
Buckminster fullerene

D
None of the above

Solution

Graphite has a layered planar structure. Carbon atoms in the plane are bonded covalently with only three of the four potential bonding sites. The fourth electron is free to migrate in the plane making graphite electrically conductive.
Question 4
1 / -0

The first three members of a homologous series are $$CH_4, C_2H_6, C_3H_8$$. The fifth member of this series will be:

A
$$C_5H_{10}$$

B
$$C_5H_{14}$$

C
$$C_5H_{12}$$

D
$$C_5H_{8}$$

Solution

General formula of homologous series is $$C_{n}H_{2n + 2}$$.
First member is methane i.e. $$CH_{4}$$
Second member is ethane i.e. $$C_{2}H_{6}$$
Third member is propane i.e. $$C_{3}H_{8}$$
Forth member is butane i.e. $$C_{4}H_{10}$$
Similarly, fifth member is pentane i.e $$C_{5}H_{12}$$
Question 5
1 / -0

Hydrocarbons having double or triple bonds are known as:

A
saturated

B
unsaturated

C
homologues

D
functional groups

Solution

The hydrocarbons containing only single bonds are called saturated hydrocarbons because each of the carbon atoms is bonded to a maximum number of atoms possible, i.e. you cannot add any other atom to it without replacing the existing one. Therefore, it is said to be saturated

Hydrocarbons containing double and triple bonds on other hand have the ability to still accept additional hydrogen / other atoms without replacing any of the existing atoms. The double/ triple bond can be cleaved and hydrogen/another atom can be added in its place without replacing the existing one. Hence, they are termed as ' unsaturated '.
Question 6
1 / -0

Which of the following is/are main component present in LPG?

A
methane

B
propane

C
butane

D
Both B and C
Solution
LPG is liquefied petroleum gas. The components are:
butane
propane
propene
butene
The main components are propane and butane. All the components are gases at normal temperature and pressures.
Question 7
1 / -0

The total no. of electrons that take part in forming a bond in $$N_2$$ is :

A
2

B
4

C
6

D
10

Solution

A triple bond is formed, when two atoms share 3 pairs of electrons between them. In a nitrogen molecule, there is a triple bond between two nitrogen atoms as they share three pairs of electrons.
Question 8
1 / -0

What is the combustion product of an organic substance that undergoes complete combustion?

A
$$H_2O$$

B
$$CO_2$$

C
Both A and B

D
$$CO$$

Solution

Organic compounds contain mainly carbon and hydrogen. They produce $$CO_2$$ and $$H_2O$$ on complete combustion.
Question 9
1 / -0

Sodium hydroxide is found in:

A
limewater

B
milk of magnesia

C
window cleaner

D
soap

Solution

When esters are treated with sodium hydroxide (an alkali) it forms alcohol and sodium salt of carboxylic acid. This reaction is known as the saponification reaction because it is used in the preparation of soap. Soaps are sodium or potassium salts of long-chain carboxylic acids. So we can say that sodium hydroxide is found in soap.
$$\bullet$$ Lime water has $$Ca(OH)_2$$
$$\bullet$$ Milk of magnesia has $$Mg(OH)_2$$
$$\bullet$$ Window cleaner has $$NH_4OH$$
Hence, option $$D$$ is correct.
Question 10
1 / -0

The property of self-linkage of carbon atoms is called:

A
addition

B
catenation

C
cracking

D
neutralisation

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 B is correct.

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Carbon and its Compounds Test - 25

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Carbon and its Compounds Test - 25

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SHARING IS CARING

Question 1

Van der Waal's forces

Ionic

Covalent

Dipolar

Solution

Question 2

7

4

5

6

Solution

Question 3

Diamond

Graphite

Buckminster fullerene

None of the above

Solution

Question 4

$$C_5H_{10}$$

$$C_5H_{14}$$

$$C_5H_{12}$$

$$C_5H_{8}$$

Solution

Question 5

saturated

unsaturated

homologues

functional groups

Solution

Question 6

methane

propane

butane

Both B and C

Solution

Question 7

2

4

6

10

Solution

Question 8

$$H_2O$$

$$CO_2$$

Both A and B

$$CO$$

Solution

Question 9

limewater

milk of magnesia

window cleaner

soap

Solution

Question 10

addition

catenation

cracking

neutralisation

Solution

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