Carbon and its Compounds Test

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Carbon and its Compounds Test - 26

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Weekly Quiz Competition

Question 1
1 / -0

Preceeding and succeeding homologous of ${C}_{10}{H}_{22}$ respectively:

A
${C}_{9}{H}_{20}, {C}_{11}{H}_{22}$

B
${C}_{9}{H}_{20}, {C}_{11}{H}_{24}$

C
${C}_{11}{H}_{24}, {C}_{9}{H}_{20}$

D
${C}_{8}{H}_{18}, {C}_{9}{H}_{20}$

Solution

Preceeeding homologue is $C_{9}H_{20}$ .
Succeeding homologue is $C_{11}H_{24}$ .
Thus, option B is correct.
Question 2
1 / -0

The molecular formula of butane is:

A
$C_4H_{10}$

B
$C_5H_{12}$

C
$C_4H_8$

D
$C_4H_6$

Solution

The general molecular formula of an alkane is $C_{n}H_{2n+2}$ . For butane, the value of n is 4. So the chemical formula of butane would be $C_{4}H_{2\times 4 + 2}=C_{4}H_{10}$ .
So, the correct option is A.
Question 3
1 / -0

A product obtained by mixing sodium hydroxide with vegetable oil is:

A
acid

B
base

C
soap

D
vinegar

Solution

When vegetable oil reacts with sodium hydroxide $(NaOH)$ , it produces sodium salt of carboxylic acid(soap).
$\implies Vegetable\ oil+NaOH\longrightarrow \underbrace {R-CO\overset {\circleddash}{O}Na}_{Soap}$
Question 4
1 / -0

Which of the following pairs are members of a homologous series?

A
$CH_3OCH_3; CH_3CH_2OH$

B
$CH_3CHO; CH_3CH_2CHO$

C
$CH_3CH_2COOH; CH_3COOCH_3$

D
$(CH_3)_2CHOH; CH_3CH_2OH$

Solution

Acetaldehyde i.e $CH_{3}CHO$ and propionaldehyde i.e $CH_{3}CH_{2}CHO$ belong from the aldehyde family hence they are homologous series.
Hence, option B is the correct answer.
Question 5
1 / -0

In double covalent bond, there is sharing of :

A
2 electrons

B
4 electrons

C
6 electrons

D
3 electrons

Solution

A double covalent bond is formed when two pairs of electrons are shared between them. For example, in an oxygen molecule, there is a double bond between two oxygen atoms as they share two pairs of electrons i.e. 4 electrons.
Question 6
1 / -0

Carbon in __________ form conducts electricity.

A
Diamond

B
Graphite

C
Coal

D
Petroleum

Solution

Graphite is an allotrope of carbon. It is a good conductor of electricity. This is because one valence electron of each carbon remains free, thus making it a good conductor of electricity.
Question 7
1 / -0

Following are the uses of a substance.

(i) It is used as an abrasive for cutting glass.

(ii) It is used as a tip of deep boring drills.

(iii) It is used for making dies for drawing wires.

(iv) It is used in generating laser beams in electronics.

What is the name of this substance?

A
Diamond

B
Buckminsterfullerene

C
Lampblack

D
Graphite
Solution
Diamond is an allotropic form of carbon. It is the hardest substance known. Uses of a diamond are:
It is used as an abrasive in cutting glass.
It is used for making dies for drawing wires.
It is used in generating laser beams in electronics.
It is used as a tip of deep boring drills.
It is ideal for grinding, cutting, drilling and polishing.
Hence, the correct option is $\text{A}$
Question 8
1 / -0

Which of the following is not an allotrope of carbon?

A
Buckyballs

B
Diamond

C
Graphite

D
Carbon dioxide

Solution

Buckyballs, diamond, and graphite are allotropes of carbon while carbon dioxide is a compound of carbon.
Hence, option D is correct.
Question 9
1 / -0

Covalent bonds are formed when electrons are ____________. Covalent compounds have ____________ electrical conductivity.

A
shared, high

B
shared, low

C
transferred, high

D
transferred, low

Solution

Sharing of electrons between two atoms during bond formation results in the formation of a covalent bond. Compounds containing covalent bonds have low electrical conductivity because electrons are shared between the atoms and no charged particles are formed, unlike ionic compounds.
Question 10
1 / -0

Which of the following statements are usually correct for carbon compounds?
(i) They are good conductors of electricity.
(ii) They are poor conductors of electricity.
(iii) They have strong forces of attraction between their molecules.
(iv) They do not have strong forces of attraction between their molecules.

A
(i) and (iii)

B
(ii) and (iii)

C
(i) and (iv)

D
(ii) and (iv)

Solution

Usually, the statements (ii) and (iv) are correct for carbon compounds.

(ii) They are poor conductors of electricity. They contain covalent bonds. Free electrons are not present which can conduct electricity.

(iv) They do not have strong forces of attraction between their molecules.

So, the correct option is $D$

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Carbon and its Compounds Test - 26

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Carbon and its Compounds Test - 26

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Question 1

C9H20,C11H22{C}_{9}{H}_{20}, {C}_{11}{H}_{22}C9​H20​,C11​H22​

C9H20,C11H24{C}_{9}{H}_{20}, {C}_{11}{H}_{24}C9​H20​,C11​H24​

C11H24,C9H20{C}_{11}{H}_{24}, {C}_{9}{H}_{20}C11​H24​,C9​H20​

C8H18,C9H20{C}_{8}{H}_{18}, {C}_{9}{H}_{20}C8​H18​,C9​H20​

Solution

Question 2

C4H10C_4H_{10}C4​H10​

C5H12C_5H_{12}C5​H12​

C4H8C_4H_8C4​H8​

C4H6C_4H_6C4​H6​

Solution

Question 3

acid

base

soap

vinegar

Solution

Question 4

CH3OCH3;CH3CH2OHCH_3OCH_3; CH_3CH_2OHCH3​OCH3​;CH3​CH2​OH

CH3CHO;CH3CH2CHOCH_3CHO; CH_3CH_2CHOCH3​CHO;CH3​CH2​CHO

CH3CH2COOH;CH3COOCH3CH_3CH_2COOH; CH_3COOCH_3CH3​CH2​COOH;CH3​COOCH3​

(CH3)2CHOH;CH3CH2OH(CH_3)_2CHOH; CH_3CH_2OH(CH3​)2​CHOH;CH3​CH2​OH

Solution

Question 5

2 electrons

4 electrons

6 electrons

3 electrons

Solution

Question 6

Diamond

Graphite

Coal

Petroleum

Solution

Question 7

Diamond

Buckminsterfullerene

Lampblack

Graphite

Solution

Question 8

Buckyballs

Diamond

Graphite

Carbon dioxide

Solution

Question 9

shared, high

shared, low

transferred, high

transferred, low

Solution

Question 10

(i) and (iii)

(ii) and (iii)

(i) and (iv)

(ii) and (iv)

Solution

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${C}_{9}{H}_{20}, {C}_{11}{H}_{22}$

${C}_{9}{H}_{20}, {C}_{11}{H}_{24}$

${C}_{11}{H}_{24}, {C}_{9}{H}_{20}$

${C}_{8}{H}_{18}, {C}_{9}{H}_{20}$

$C_4H_{10}$

$C_5H_{12}$

$C_4H_8$

$C_4H_6$

$CH_3OCH_3; CH_3CH_2OH$

$CH_3CHO; CH_3CH_2CHO$

$CH_3CH_2COOH; CH_3COOCH_3$

$(CH_3)_2CHOH; CH_3CH_2OH$