Carbon and it's Compounds - grade 10 ncert

Carbon

A versatile element that forms the basis for all living organisms and many things we use.

Covalent bond

A chemical bond formed by the sharing of electrons between two atoms.

Catenation

The ability of carbon to form long chains with other carbon atoms.

Saturated compounds

Compounds of carbon linked by only single bonds.

Unsaturated compounds

Compounds of carbon that contain double or triple bonds between carbon atoms.

Hydrocarbons

Organic compounds composed only of carbon and hydrogen.

Micelle

A structure formed by soap molecules in which the hydrophobic tails are in the interior and the ionic heads face outward.

Functional groups

Groups of atoms that confer specific properties to carbon compounds.

Homologous series

A series of compounds in which the same functional group substitutes for hydrogen in a carbon chain.

Ethanol

A colorless, flammable liquid, commonly known as alcohol.

Ethanoic acid

Also known as acetic acid, it is a carboxylic acid commonly used as a preservative.

Oxidation reaction

A chemical reaction that involves the addition of oxygen to a substance.

Hydrogenation

A chemical reaction in which hydrogen is added to an unsaturated hydrocarbon to make it saturated.

Esters

Compounds formed from the reaction of an acid and an alcohol, typically providing pleasant smells.

Substitution reaction

A chemical reaction where one atom or group of atoms is replaced by another atom or group.

Combustion

The chemical process of burning, producing carbon dioxide and releasing heat and light.

Carboxylic acids

Organic acids characterized by the presence of a carboxyl group (−COOH).

Alkanes

Saturated hydrocarbons that only contain single bonds between carbon atoms.

Alkenes

Unsaturated hydrocarbons that contain at least one double bond between carbon atoms.

Alkynes

Unsaturated hydrocarbons that contain at least one triple bond between carbon atoms.

Chains, Branches, and Rings

These refer to the different structural forms of carbon compounds; chains are linear structures, branches are side chains off the main chain, and rings are cyclic structures.

Properties of Saturated Compounds

Saturated compounds typically have higher melting and boiling points compared to unsaturated compounds due to their single bonds.

Examples of Saturated Hydrocarbons

Common examples include methane, ethane, and propane, which only contain single bonds.

Properties of Unsaturated Compounds

Unsaturated compounds have lower melting and boiling points and are generally more reactive than saturated compounds.

Examples of Unsaturated Hydrocarbons

Examples include ethylene (ethene) and acetylene (ethyne), which contain double and triple bonds, respectively.

Formation of Saturated Compounds

Saturated compounds can be formed through hydrogenation, where hydrogen is added to unsaturated compounds.

Reactivity of Saturated vs Unsaturated Compounds

Unsaturated compounds undergo reactions like addition reactions, while saturated compounds are less reactive.

Applications of Saturated Compounds

Saturated hydrocarbons are commonly used as fuels, such as in gasoline and heating oils.

Applications of Unsaturated Compounds

Unsaturated compounds are found in many natural oils, which are used in cooking and cosmetics.

Structural Differences

Saturated compounds have no double or triple bonds, while unsaturated compounds contain at least one double or triple bond in their structure.

Health Implications of Saturated vs Unsaturated Fats

Saturated fats are often linked to increased cholesterol levels, while unsaturated fats are considered healthier for heart health.

What is the versatility of carbon?

Carbon can form various compounds by bonding with different elements, making it the backbone of life.

Why is carbon known as the 'element of life'?

Carbon's ability to form stable bonds with many elements allows for the complex molecules necessary for biological processes.

How many covalent bonds can carbon typically form?

Carbon can form four covalent bonds with other atoms.

What are organic molecules?

Organic molecules are predominantly composed of carbon and are fundamental to living organisms.

What role do carbon chains play in organic compounds?

Carbon chains form the structural backbone of many organic compounds, affecting their properties and functions.

What is an example of a complex structure formed by carbon?

Glucose, a simple sugar, is a complex structure that demonstrates carbon's versatility.

What is the significance of isomerism in carbon compounds?

Isomerism allows for compounds with the same molecular formula to have different structures and properties.

How does the hybridization of carbon impact its bonding?

Carbon can undergo sp3, sp2, or sp hybridization, affecting the shape and reactivity of the molecules it forms.

What are some functions of carbon in living organisms?

Carbon is essential for forming DNA, proteins, carbohydrates, and lipids.

How does carbon contribute to the diversity of life?

Carbon's ability to form diverse structures leads to a vast array of biological molecules, contributing to the complexity of life.

IUPAC Nomenclature

A systematic method for naming organic chemical compounds established by the International Union of Pure and Applied Chemistry (IUPAC).

Alkane Naming

Alkanes are named using the prefix indicating the number of carbon atoms followed by the suffix '-ane'.

Alkene Naming

Alkenes are named similarly to alkanes, but use the suffix '-ene' to indicate the presence of a double bond.

Alkyne Naming

Alkynes are named using the same carbon prefix as alkanes and alkenes, with the suffix '-yne' for triple bonds.

Substituents

Groups attached to the main carbon chain that are named as prefixes in the compound name, such as methyl or ethyl.

Numbering Chains

Carbon chains are numbered to give the lowest possible locants for double or triple bonds and other functional groups.

Functional Group Priority

In IUPAC naming, functional groups are prioritized to determine the suffix of the compound name (e.g., alcohols use '-ol').

Cyclic Compounds

Cyclic organic compounds are named by adding the prefix 'cyclo-' before the alkane name that corresponds to the number of carbons.

Stereoisomer Naming

Stereoisomers are differentiated in names using prefixes like 'cis-' or 'trans-' for geometric isomers.

Common Names vs IUPAC Names

Common names are often used for well-known compounds, while IUPAC names follow formal rules for naming.

Homologous Series

A series of compounds with the same functional group and a differing number of CH2 units.

Functional Group

An atom or group of atoms that defines the characteristic reactions of a compound.

Aliphatic Compounds

Organic compounds that consist of carbon and hydrogen arranged in straight or branched chains.

Aromatic Compounds

Organic compounds that contain one or more benzene rings in their structure.

Branched Alkanes

Alkanes that have one or more carbon atoms branching off the main carbon chain.

Example of Functional Group

-OH (hydroxyl group) indicates the presence of alcohol in a compound.

Saturation

The number of hydrogen atoms in a compound; saturated compounds have no double or triple bonds.

Benzene Derivatives

Compounds formed by replacing one or more hydrogen atoms in benzene with other groups.

Parent Chain

The longest continuous chain of carbon atoms in a molecule, used as the base for naming.

Trivial Naming

An informal or common name used for organic compounds that may not follow IUPAC rules.

What is combustion?

The chemical reaction of a substance with oxygen, producing heat and light.

Types of combustion

Combustion can be classified as complete or incomplete, depending on the amount of oxygen present.

Complete combustion

Occurs when there is sufficient oxygen, producing carbon dioxide and water as products.

Incomplete combustion

Occurs when there is not enough oxygen, producing carbon monoxide and/or soot.

Products of combustion

The main products of combustion are carbon dioxide, water, and energy (heat and light).

Hydrocarbon combustion

Hydrocarbons typically combust to produce carbon dioxide and water along with energy.

Exothermic reaction

Combustion is an exothermic reaction, meaning it releases energy in the form of heat.

Applications of combustion

Combustion is used in engines, heating systems, and for producing electricity.

Carbon monoxide danger

Incomplete combustion can produce carbon monoxide, a toxic gas that is dangerous when inhaled.

Balancing combustion reactions

Combustion reactions can be balanced by ensuring the same number of each type of atom on both sides of the equation.

Addition Reaction

A chemical reaction in which two or more reactants combine to form a single product.

Substitution Reaction

A chemical reaction in which one atom or group of atoms in a molecule is replaced by another atom or group.

Example of Addition Reaction

The reaction between ethene and bromine to form dibromoethane.

Example of Substitution Reaction

The reaction of methane with chlorine to produce chloromethane and hydrogen chloride.

Saturated vs Unsaturated Compounds in Addition Reactions

Addition reactions typically occur with unsaturated compounds (like alkenes and alkynes).

Catalysts in Addition Reactions

Catalysts are often used to speed up addition reactions, particularly in hydrogenation processes.

Types of Addition Reactions

Common types include hydrogenation, halogenation, and hydration.

Significance of Substitution Reactions

Substitution reactions are essential in organic synthesis, allowing the modification of functional groups.

Reaction Mechanism of Addition Reactions

Addition reactions often involve the formation of a reactive intermediate, like a carbocation.

Reaction Mechanism of Substitution Reactions

Substitution reactions can occur through single displacement or double displacement mechanisms.

Properties of Ethanol

Ethanol is a colorless, flammable liquid with a pleasant odor, soluble in water.

Boiling Point of Ethanol

Ethanol has a boiling point of 78.37 °C (173.07 °F), which is relatively low compared to water.

Density of Ethanol

The density of ethanol is about 0.789 g/cm³ at 20 °C, making it less dense than water.

Uses of Ethanol

Ethanol is widely used in beverages, as a solvent, and in fuel (bioethanol).

Oxidation of Ethanol

Ethanol can be oxidized to form acetaldehyde and then further to acetic acid.

Combustion of Ethanol

The combustion of ethanol produces carbon dioxide and water, releasing energy.

Fermentation Process

Ethanol is produced via fermentation, where sugars are converted by yeast under anaerobic conditions.

Reaction with Sodium

Ethanol reacts with sodium metal to produce sodium ethoxide and hydrogen gas.

Dehydration of Ethanol

Ethanol can undergo dehydration to form ethylene (ethene) when heated with acid.

Solubility of Ethanol

Ethanol is highly soluble in water due to hydrogen bonding, making it an excellent solvent.

Properties of Ethanoic Acid

Ethanoic acid is a colorless liquid with a pungent smell, and it is soluble in water.

Boiling Point of Ethanoic Acid

The boiling point of ethanoic acid is 118.1 °C (244.6 °F).

Density of Ethanoic Acid

Ethanoic acid has a density of approximately 1.05 g/cm³ at 20 °C, making it denser than water.

pH of Ethanoic Acid

Ethanoic acid has a pH of around 2.4 in a 1M solution, indicating its acidic nature.

Reactions of Ethanoic Acid with Alcohols

Ethanoic acid can react with alcohols in a condensation reaction to form esters.

Oxidation of Ethanoic Acid

Oxidation of ethanoic acid leads to the formation of carbon dioxide and water.

Reaction with Metals

Ethanoic acid reacts with reactive metals to produce hydrogen gas and metal acetate.

Neutralization Reaction

Ethanoic acid can react with bases to form water and sodium acetate in a neutralization reaction.

Use as a Preservative

Ethanoic acid is commonly used as a food preservative due to its antimicrobial properties.