#nomenclature

CHEMISTRY

What is the IUPAC name of [Cr(H₂O)6]Cl₃ ?

Given: What is the IUPAC name of [Cr(H₂O)6]Cl₃ ? Formula: The complex ion is [Cr(H₂O)6]^{3+. Substitution & Calculation: Ligand: aqua (H₂O). Cr is +3 (3 Cl⁻ balance +3 charge). Name: hexaaquachromium(III) chloride. Final Result: The computed value matches expected outcome and confirms correct choice as per latest NCERT 2026-27.

Ref: NCERT Chemistry Textbook - Latest Edition for Academic Session 2026-27 (Rationalized Textbook for Class XI and XII), Chapter: Electrochemistry (Latest NCERT 2026-27), Topic: Faraday's laws, charge required to reduce Al³⁺, 3F = 3 × 96500 C

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CHEMISTRY

What is the IUPAC name of [Co(NH₃)5(NO₂)]Cl₂ ?

Given: What is the IUPAC name of [Co(NH₃)5(NO₂)]Cl₂ ? These values define the system as per NCERT data. Formula: The complex ion is [Co(NH₃)5(NO₂)]^{2+. This is standard NCERT relation. Substitution & Calculation: Ligands: ammine (NH₃), nitrito-N (NO₂). Co is +3 (2 Cl⁻ balance +2 charge). Name: pentaamminenitrito-N-cobalt(III) chloride. Result: The computed value matches expected outcome and confirms correct choice as per NCERT.

Ref: NCERT Chemistry Textbook for Class XI and XII, Chapter: Some Basic Concepts, Structure of Atom, Periodicity and relevant Chemistry topic, Topic: Mole concept and periodic trends.

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Classification and Nomenclature and Structures of Alcohols Phenols Ethers

What is the IUPAC name of CH₃-CH(OH)-CH(OH)-CH₃?

The compound has a 4-carbon chain with -OH groups on carbons 2 and 3, named butane-2,3-diol in IUPAC nomenclature.

Ref: NCERT Class 12 Chemistry > Chapter 7: Alcohols, Phenols and Ethers > Topic: Classification and Nomenclature and Structures of Alcohols Phenols Ethers

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Classification and Nomenclature and Structures of Alcohols Phenols Ethers

What is the IUPAC name of CH₃-CH(OH)-CH₂-CH(OH)-CH₃?

The compound has a 5-carbon chain with -OH groups on carbons 2 and 4, named pentane-2,4-diol in IUPAC nomenclature.

Ref: NCERT Class 12 Chemistry > Chapter 7: Alcohols, Phenols and Ethers > Topic: Classification and Nomenclature and Structures of Alcohols Phenols Ethers

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Polyhalogen Compounds - Chloroform Iodoform DDT Freons

What is the IUPAC name of CH₃CH₂CH₂CH(Cl)CH₃ ?

The compound has a five-carbon chain (pentane) with chlorine on the fourth carbon. The name is 4-chloropentane.

Ref: NCERT Class 12 Chemistry > Chapter 6: Haloalkanes and Haloarenes > Topic: Polyhalogen Compounds - Chloroform Iodoform DDT Freons

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Polyhalogen Compounds - Chloroform Iodoform DDT Freons

What is the IUPAC name of CH₃CH₂CH₂CH₂Cl ?

The compound has a four-carbon chain with chlorine on the first carbon. The parent chain is butane, so the name is 1-chlorobutane.

Ref: NCERT Class 12 Chemistry > Chapter 6: Haloalkanes and Haloarenes > Topic: Polyhalogen Compounds - Chloroform Iodoform DDT Freons

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Physical Properties - Boiling Point Dipole Moment Solubility

Which compound has the IUPAC name 2-bromo-3-methylbutane?

2-Bromo-3-methylbutane is a four-carbon chain (butane) with Br on C₂ and a methyl group on C₃: CH₃CHBrCH(CH₃)CH₃ .

Ref: NCERT Class 12 Chemistry > Chapter 6: Haloalkanes and Haloarenes > Topic: Physical Properties - Boiling Point Dipole Moment Solubility

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Physical Properties - Boiling Point Dipole Moment Solubility

What is the IUPAC name of the compound CH₃CH₂CH(Cl)CH₃ ?

The compound has a four-carbon chain with a chlorine atom on the second carbon. The parent chain is butane, and the chlorine is a substituent, so the name is 2-chlorobutane.

Ref: NCERT Class 12 Chemistry > Chapter 6: Haloalkanes and Haloarenes > Topic: Physical Properties - Boiling Point Dipole Moment Solubility

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Classification and Nomenclature and Isomerism of Haloalkanes

What is the IUPAC name of CH₃CH(CH₃)CH₂Cl ?

The longest chain is four carbons (butane), with a methyl group on the second carbon and chlorine on the fourth. The name is 1-chloro-2-methylbutane.

Ref: NCERT Class 12 Chemistry > Chapter 6: Haloalkanes and Haloarenes > Topic: Classification and Nomenclature and Isomerism of Haloalkanes

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Systematics and Taxonomy Concepts

Which branch of biology deals with the characterisation, identification, nomenclature and classification of organisms?

Taxonomy includes characterisation, identification, classification and nomenclature of organisms.

Ref: NCERT Class 11 Biology Chapter 1: The Living World Systematics and Taxonomy Concepts

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Taxonomical Aids - Zoological Parks and Keys

A student writes the mango’s biological name by hand as Mangifera indica and underlines both words together. Which corre

When a biological name is handwritten, the generic name and specific epithet are underlined separately. The generic name begins with a capital letter, while the specific epithet begins with a small letter.

Ref: NCERT Class 11 Biology Chapter 1: The Living World Taxonomical Aids - Zoological Parks and Keys

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Taxonomical Aids - Herbarium and Botanical Gardens

A scientist assigns a biological name before determining exactly which organism the name represents. Which essential pro

Nomenclature is possible only when the organism has been correctly described and the organism to which the name is attached is known. This process is identification.

Ref: NCERT Class 11 Biology Chapter 1: The Living World Taxonomical Aids - Herbarium and Botanical Gardens

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