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Science

Carbon and its Compounds Quiz

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Question 1

Carbon's bonding choice

Difficulty: easySource: NCERT Section 4.1 alignedTopic: covalent-bonding-in-carbon

Why does carbon generally form covalent bonds?

1It has no valence electrons2Losing or gaining four electrons is energetically difficult3It can form only negative ions4Its outermost shell is already complete

Question 2

Nitrogen molecule

Difficulty: easySource: NCERT Figure 4.4 alignedTopic: covalent-bonding-in-carbon

How many shared electron pairs form the bond in N2?

1one2two3three4four

Question 3

Covalent properties

Difficulty: mediumSource: NCERT Section 4.1 and 2026 board-demand alignedTopic: covalent-bonding-in-carbon

Most covalent compounds have low melting points and conduct electricity poorly because they have:

1weak intermolecular attractions and no mobile charged particles2very strong ionic lattices3free metal electrons4only positive ions

Question 4

Versatility

Difficulty: easySource: NCERT Section 4.2 alignedTopic: versatile-nature-of-carbon

The two main properties responsible for carbon's huge number of compounds are:

1sonority and ductility2acidity and basicity3tetravalency and catenation4oxidation and reduction

Question 5

Pentane isomers

Difficulty: mediumSource: NCERT in-text Question alignedTopic: versatile-nature-of-carbon

How many structural isomers does pentane have?

1one2two3three4five

Question 6

Saturated hydrocarbon

Difficulty: easySource: NCERT Section 4.2.1 alignedTopic: hydrocarbons-and-homologous-series

Which compound is saturated?

1ethene2ethyne3ethane4propyne

Question 7

Homologous step

Difficulty: easySource: NCERT Section 4.2.4 alignedTopic: hydrocarbons-and-homologous-series

Successive members of a homologous series differ by:

1CH2CH2 and 14 u3C2H2 and 26 u4one functional group

Question 8

Physical trend

Difficulty: mediumSource: NCERT Section 4.2.4 and 2024 PYQ alignedTopic: hydrocarbons-and-homologous-series

Why does a higher member of a homologous series usually have a higher boiling point?

1Its functional group disappears2Greater molecular mass strengthens intermolecular attraction3It becomes ionic4It always has a triple bond

Question 9

Functional group

Difficulty: easySource: NCERT Table 4.3 alignedTopic: functional-groups-and-naming

Which group identifies a carboxylic acid?

1-OH2-CHO3>C=O4-COOH

Question 10

Naming

Difficulty: mediumSource: NCERT Table 4.4 and board-demand alignedTopic: functional-groups-and-naming

What is the name of CH3-CO-CH3?

1propanal2propanone3propanol4propanoic acid

Question 11

Sooty flame

Difficulty: easySource: NCERT Activities 4.3-4.4 alignedTopic: chemical-properties-of-carbon-compounds

A yellow flame that blackens a metal plate indicates:

1complete combustion with excess oxygen2incomplete combustion and soot formation3neutralisation4hydrogenation

Question 12

Oxidation of ethanol

Difficulty: easySource: NCERT Section 4.3.2 alignedTopic: chemical-properties-of-carbon-compounds

Which reagent can oxidise ethanol to ethanoic acid?

1alkaline potassium permanganate2sodium chloride3calcium carbonate4soap solution

Question 13

Addition reaction

Difficulty: mediumSource: NCERT Section 4.3.3 alignedTopic: chemical-properties-of-carbon-compounds

Which reaction is an addition reaction?

1CH4 + Cl2 -> CH3Cl + HCl2CH2=CH2 + H2 -> CH3CH33CH3COOH + NaOH -> CH3COONa + H2O4CH4 + 2O2 -> CO2 + 2H2O

Question 14

Substitution condition

Difficulty: easySource: NCERT Section 4.3.4 alignedTopic: chemical-properties-of-carbon-compounds

Methane reacts with chlorine by substitution in the presence of:

1darkness2sunlight3water only4nickel and hydrogen

Question 15

Ethanol with sodium

Difficulty: easySource: NCERT Activity 4.6 alignedTopic: ethanol-and-ethanoic-acid

The gas released when sodium reacts with ethanol is:

1oxygen2carbon dioxide3hydrogen4chlorine

Question 16

Dehydration

Difficulty: mediumSource: NCERT Section 4.4.1 and 2024-2026 board-demand alignedTopic: ethanol-and-ethanoic-acid

At 443 K, concentrated sulphuric acid converts ethanol into:

1ethane2ethene3ethanoic acid4ethyl ethanoate

Question 17

Esterification

Difficulty: mediumSource: NCERT Activity 4.8 alignedTopic: ethanol-and-ethanoic-acid

Ethanol and ethanoic acid, warmed with concentrated sulphuric acid, form:

1ethyl ethanoate and water2methane and carbon dioxide3sodium ethanoate and hydrogen4ethene and oxygen

Question 18

Glacial acetic acid

Difficulty: easySource: NCERT Section 4.4.2 and 2026 PYQ alignedTopic: ethanol-and-ethanoic-acid

Pure ethanoic acid is called glacial acetic acid because it:

1boils at 290 K2freezes near 290 K into ice-like crystals3always contains ice4is a strong mineral acid

Question 19

Micelle orientation

Difficulty: easySource: NCERT Figures 4.12-4.13 and 2026 PYQ alignedTopic: soaps-and-detergents

In a soap micelle in water:

1hydrophobic tails point inward and hydrophilic heads face water2hydrophilic heads point inward into grease3every tail lies on the water surface4heads and tails point randomly

Question 20

Hard water

Difficulty: mediumSource: NCERT Section 4.5 alignedTopic: soaps-and-detergents

Why does detergent work better than soap in hard water?

1Detergent forms more calcium scum2Its charged end does not form insoluble calcium/magnesium precipitates3It has no hydrocarbon tail4It neutralises all minerals

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Question 1

Carbon's bonding choice

Difficulty: easySource: NCERT Section 4.1 alignedTopic: covalent-bonding-in-carbon

Why does carbon generally form covalent bonds?

1It has no valence electrons2Losing or gaining four electrons is energetically difficult3It can form only negative ions4Its outermost shell is already complete

Question 2

Nitrogen molecule

Difficulty: easySource: NCERT Figure 4.4 alignedTopic: covalent-bonding-in-carbon

How many shared electron pairs form the bond in N2?

1one2two3three4four

Question 3

Covalent properties

Difficulty: mediumSource: NCERT Section 4.1 and 2026 board-demand alignedTopic: covalent-bonding-in-carbon

Most covalent compounds have low melting points and conduct electricity poorly because they have:

1weak intermolecular attractions and no mobile charged particles2very strong ionic lattices3free metal electrons4only positive ions

Question 4

Versatility

Difficulty: easySource: NCERT Section 4.2 alignedTopic: versatile-nature-of-carbon

The two main properties responsible for carbon's huge number of compounds are:

1sonority and ductility2acidity and basicity3tetravalency and catenation4oxidation and reduction

Question 5

Pentane isomers

Difficulty: mediumSource: NCERT in-text Question alignedTopic: versatile-nature-of-carbon

How many structural isomers does pentane have?

1one2two3three4five

Question 6

Saturated hydrocarbon

Difficulty: easySource: NCERT Section 4.2.1 alignedTopic: hydrocarbons-and-homologous-series

Which compound is saturated?

1ethene2ethyne3ethane4propyne

Question 7

Homologous step

Difficulty: easySource: NCERT Section 4.2.4 alignedTopic: hydrocarbons-and-homologous-series

Successive members of a homologous series differ by:

1CH2CH2 and 14 u3C2H2 and 26 u4one functional group

Question 8

Physical trend

Difficulty: mediumSource: NCERT Section 4.2.4 and 2024 PYQ alignedTopic: hydrocarbons-and-homologous-series

Why does a higher member of a homologous series usually have a higher boiling point?

1Its functional group disappears2Greater molecular mass strengthens intermolecular attraction3It becomes ionic4It always has a triple bond

Question 9

Functional group

Difficulty: easySource: NCERT Table 4.3 alignedTopic: functional-groups-and-naming

Which group identifies a carboxylic acid?

1-OH2-CHO3>C=O4-COOH

Question 10

Naming

Difficulty: mediumSource: NCERT Table 4.4 and board-demand alignedTopic: functional-groups-and-naming

What is the name of CH3-CO-CH3?

1propanal2propanone3propanol4propanoic acid

Question 11

Sooty flame

Difficulty: easySource: NCERT Activities 4.3-4.4 alignedTopic: chemical-properties-of-carbon-compounds

A yellow flame that blackens a metal plate indicates:

1complete combustion with excess oxygen2incomplete combustion and soot formation3neutralisation4hydrogenation

Question 12

Oxidation of ethanol

Difficulty: easySource: NCERT Section 4.3.2 alignedTopic: chemical-properties-of-carbon-compounds

Which reagent can oxidise ethanol to ethanoic acid?

1alkaline potassium permanganate2sodium chloride3calcium carbonate4soap solution

Question 13

Addition reaction

Difficulty: mediumSource: NCERT Section 4.3.3 alignedTopic: chemical-properties-of-carbon-compounds

Which reaction is an addition reaction?

1CH4 + Cl2 -> CH3Cl + HCl2CH2=CH2 + H2 -> CH3CH33CH3COOH + NaOH -> CH3COONa + H2O4CH4 + 2O2 -> CO2 + 2H2O

Question 14

Substitution condition

Difficulty: easySource: NCERT Section 4.3.4 alignedTopic: chemical-properties-of-carbon-compounds

Methane reacts with chlorine by substitution in the presence of:

1darkness2sunlight3water only4nickel and hydrogen

Question 15

Ethanol with sodium

Difficulty: easySource: NCERT Activity 4.6 alignedTopic: ethanol-and-ethanoic-acid

The gas released when sodium reacts with ethanol is:

1oxygen2carbon dioxide3hydrogen4chlorine

Question 16

Dehydration

Difficulty: mediumSource: NCERT Section 4.4.1 and 2024-2026 board-demand alignedTopic: ethanol-and-ethanoic-acid

At 443 K, concentrated sulphuric acid converts ethanol into:

1ethane2ethene3ethanoic acid4ethyl ethanoate

Question 17

Esterification

Difficulty: mediumSource: NCERT Activity 4.8 alignedTopic: ethanol-and-ethanoic-acid

Ethanol and ethanoic acid, warmed with concentrated sulphuric acid, form:

1ethyl ethanoate and water2methane and carbon dioxide3sodium ethanoate and hydrogen4ethene and oxygen

Question 18

Glacial acetic acid

Difficulty: easySource: NCERT Section 4.4.2 and 2026 PYQ alignedTopic: ethanol-and-ethanoic-acid

Pure ethanoic acid is called glacial acetic acid because it:

1boils at 290 K2freezes near 290 K into ice-like crystals3always contains ice4is a strong mineral acid

Question 19

Micelle orientation

Difficulty: easySource: NCERT Figures 4.12-4.13 and 2026 PYQ alignedTopic: soaps-and-detergents

In a soap micelle in water:

1hydrophobic tails point inward and hydrophilic heads face water2hydrophilic heads point inward into grease3every tail lies on the water surface4heads and tails point randomly

Question 20

Hard water

Difficulty: mediumSource: NCERT Section 4.5 alignedTopic: soaps-and-detergents

Why does detergent work better than soap in hard water?

1Detergent forms more calcium scum2Its charged end does not form insoluble calcium/magnesium precipitates3It has no hydrocarbon tail4It neutralises all minerals

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Carbon and its Compounds Quiz

Select your answers

Carbon's bonding choice

Nitrogen molecule

Covalent properties

Versatility

Pentane isomers

Saturated hydrocarbon

Homologous step

Physical trend

Functional group

Naming

Sooty flame

Oxidation of ethanol

Addition reaction

Substitution condition

Ethanol with sodium

Dehydration

Esterification

Glacial acetic acid

Micelle orientation

Hard water

Preparing your questions...

Select your answers

Carbon's bonding choice

Nitrogen molecule

Covalent properties

Versatility

Pentane isomers

Saturated hydrocarbon

Homologous step

Physical trend

Functional group

Naming

Sooty flame

Oxidation of ethanol

Addition reaction

Substitution condition

Ethanol with sodium

Dehydration

Esterification

Glacial acetic acid

Micelle orientation

Hard water