Chemistry

Chemical Nomenclature

67 Questions

Chemical nomenclature focuses on writing standard IUPAC names for organic and inorganic compounds. This topic is essential for chemistry sections across science exams. Regular practice helps in quickly identifying functional groups and structural priority.

organic compound naminginorganic compound namingIUPAC naming rulesfunctional groups

Chemical Nomenclature Questions

Multiple choice general knowledge science & technology

Full form of IUPAC is

  1. International Unity on Pure and Applied Chemistry

  2. International Union on Pure and Applied Chemistry

  3. International Union on Purity and Applied Chemistry

  4. International Union on Pure and Applicable Chemistry
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

IUPAC stands for International Union of Pure and Applied Chemistry. It's the global authority on chemical nomenclature, terminology, and standardized measurement, established to provide a common language for chemistry worldwide.

Multiple choice general knowledge

What is the chemical name of IF7 ?

  1. Iron hectafluoride

  2. Iron heptafluoride

  3. Iodine heptafluoride

  4. Iodine heptofluoride
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

IF7 is Iodine heptafluoride, where I is the chemical symbol for Iodine (not Iron, which is Fe). The prefix hepta- indicates seven fluorine atoms. Option D has a typo (heptofluoride instead of heptafluoride).

Multiple choice general knowledge science & technology

CH3CHO - Careful its IUPAC name

  1. Acetone

  2. Acetaldehyde

  3. Methanal

  4. Ethanal
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

CH3CHO is acetaldehyde, whose IUPAC name is ethanal. The 'eth-' prefix indicates two carbons, and '-al' suffix denotes an aldehyde functional group. Acetone is (CH3)2CO, methanal is HCHO (formaldehyde), so ethanal is the correct systematic name for CH3CHO.

Multiple choice general knowledge science & technology

CH3CH2CH2CH2COOH - Its IUPAC name

  1. Valeric acid

  2. Pentanoic acid

  3. Propanoic Acid

  4. None
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The structure CH3CH2CH2CH2COOH is a five-carbon straight-chain carboxylic acid, which is named pentanoic acid in IUPAC nomenclature (penta = 5 carbons). Option A 'Valeric acid' is a common name but not IUPAC. Propanoic acid has only 3 carbons, and 'None' is incorrect since pentanoic acid is a valid answer.

Multiple choice general knowledge science & technology

C6H5-OH - Its IUPAC name

  1. Phenol

  2. Hydroxy Benzene

  3. Benzene alcohol

  4. all the above
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

C6H5-OH is phenol. The correct IUPAC systematic name is hydroxybenzene, where the -OH substituent is named as 'hydroxy' attached to benzene. 'Phenol' (A) is the accepted common name but not the systematic IUPAC name. 'Benzene alcohol' (C) is incorrect terminology.

Multiple choice general knowledge science & technology

NAME OF -CONH2 GROUP

  1. FLORO

  2. OXIME

  3. AMIDE

  4. NITRO
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The -CONH2 functional group is called an amide. Amides are derived from carboxylic acids where the -OH group is replaced by -NH2. Fluoro (A) refers to -F, oxime (B) is =NOH, and nitro (D) is -NO2. The amide group is crucial in proteins (peptide bonds).

Multiple choice general knowledge culture

Staying with chemical names, we meet the king of long words- 1,913 letters long! (Some say it's 1,909 letters long, but I don't have the patience to count.) methionylglutaminylarginyltyrosylglutamylserylleucylphenyl- alanylalanylglutaminylleucyllysylglutamylarginyllysyglutamyl- gycylalanylphenylalanylvalylprolylphenylalanylvalylthreonyl- leucylglycylaspartylprolylglycyllisoleucylglutamylglutaminyl- serylleucyllysylisoleucylaspartylthreonylleucylisoleucyl- glutamylalanylglycylalanylaspartylalanylleucylglutamylleucyl- glycylisoleucylprolylphenylalanylserylaspartylprolylleucyl- alanylaspartylglycylprolylthreonylisoleucylglutaminylasparaginyl- alanylthreonylleucylarginylalanylphenylalanylalanylalanyl- glycylvalylthreonylprolylalanylglutaminylcysteinylphenylalanyl- glutamylmethionylleucylalanylleucylisoleucylarginylglutaminyl- lysylhistidylprolylthreonylisoleucylprolylisoleucylglycylleucyl- leucylmethionyltyrosylalanylasparaginylleucylvalylphenylalanyl- asparaginyllysylglycylisoleucylaspartylglutamylphenylalanyl- tyrosylalanylglutaminylcysteinylglutamyllysylvalylglycylvalyl- aspartylsrylvalylleucylvalylalanylaspartylvalylprolylvalyl- glutaminylglutamylserylalanylprolylphenylalanylarginylglutaminyl- alanylalanylleucylarginylhistidylasparaginylvalylalanyl- prolylisoleucylphenylalanylisoleucylcysteinylprolylprolylaspartyl- alanylaspartylaspartylaspartylleucylleucylarginylglutaminyl- isoleucylalanylseryltyrosylglycylarginylglycyltyrosylthreonyl- tyrosylleucylleucylserylarginylalanylglycylvalylthreonylglycyl- alanylglutamylasparaginylarginylalanylalanylleucylleucyllysyl- glutamyltyrosylasparaginylalanylalanylprolylprolylleucylglutaminyl- glycylphenylalanylglysylisoleucylserylalanylprolylaspartylglutaminyl- valyllysylalanylalanylisoleucylaspartylalanylglycylalanylalanyl- glycylalanylisoleucylserylglycylserylalanylisoleucylvalyllysylisoleucyl- isoleucylglutamylglutaminylhistidylasparaginylisoleucylglutamyl- prolylglutamyllysylmethionylleucylalanylalanylleucyllysylvalylphenyl- alanylvalylglutaminylprolylmethionyllysylalanylalanylthreonylarginy- lserine Quite overwhelming, isn't it? It is the term for the formula C1289H2051N343O375S. What type of a compound is this chemical?

  1. carbohydrate

  2. protein

  3. vitamin

  4. lipid
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

This chemical is a protein, specifically the tryptophan synthase protein (or similar large protein structure). The sequence consists entirely of amino acid residues (methionyl, glutaminyl, arginyl, etc.) which are the building blocks of proteins. Proteins are long chains of amino acids, while carbohydrates, lipids, and vitamins have different chemical structures.

Multiple choice technology

Group Name for CMHDB

  1. GLJIMSP

  2. GLJIMDV

  3. GLJIMAR

  4. GLCMHDB
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

GLJIMDV is the designated group name identifier for the CMHDB system within the organization's system classification framework. The other options (GLJIMSP, GLJIMAR, GLCMHDB) represent group names for different systems or subsystems and are not the correct group identifier for CMHDB.

Multiple choice

The correct IUPAC name of the complex [Co(en)3](NO32 is

  1. tris(ethylenediamine)cobalt(II) dinitrate

  2. dinitratotris(ethylenediamine)cobalt(II)

  3. triethylenediaminecobalt(II) nitrate

  4. tris(ethylenediamine)cobalt(II) nitrate

  5. tris(ethylenediamine)cobalt(III) nitrate
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Correct IUPAC name of the complex [Co(en)3](NO32 is tris(ethylenediamine)cobalt(II) nitrate.

Multiple choice

The correct IUPAC name of complex [Mo(N2)2(dppe)2] is

  1. dinitrogen bis[1,2-bis(diphenylphosphino)ethane]molybdenum(0)

  2. bis(dinitrogen)bis[1,2-bis(diphenylphosphino)ethane]molybdenum(0)

  3. bis(dinitrogen)bis[1,2-bis(diphenylphosphino)ethane]molybdenum(II)

  4. bis(dinitrogen)bis[1,2-(diphenylphosphino)ethane]molybdenum(0)

  5. bis(dinitrogen)bis[1,2-bis(diphenylphosphino)ethane]molybdate(0)
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

It is the correct IUPAC name.

Multiple choice

The IUPAC name of [Pt(H2NCH2CH2NH2)2Cl2]Cl2 is

  1. tetrachlorobis(ethylenediamine)platinum(IV)

  2. dichlorodi(ethylenediamine)platinum(IV) chloride

  3. tetrachlorobis(ethylenediamine)platinum(II)

  4. dichlorobis(ethylenediamine)platinum(II) chloride

  5. dichlorobis(ethylenediamine)platinum(IV) chloride
Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

Correct answer

Multiple choice

IUPAC name of CH3-O-C2H5 is

  1. ethoxymethane

  2. methoxyethane

  3. ethylmethyl ether

  4. methyl ethyl ether

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

IUPAC name of CH3-O-C2H5 is methoxyethane.