Objective Questions

Questions (2006)

#	Question	Topic	Actions
1601	Which component of the IUPAC name specifies the identity, location, and number …	IUPAC Nomenclature	View
1602	If an alkane contains 7 carbon atoms in its longest chain, what is its parent n…	IUPAC Nomenclature	View
1603	What is the IUPAC name for a straight-chain alkane with 10 carbon atoms?	IUPAC Nomenclature	View
1604	Which of the following is the correct suffix for a molecule belonging to the al…	IUPAC Nomenclature	View
1605	When two different carbon chains have the same length, how is the parent chain …	IUPAC Nomenclature	View
1606	In what direction should the parent chain be numbered to locate substituents?	IUPAC Nomenclature	View
1607	How is a branch formed from an alkane by removing one hydrogen atom named?	IUPAC Nomenclature	View
1608	Which substituent is abbreviated as 'Et-'?	IUPAC Nomenclature	View
1609	What is the name of the $C_6H_5-$ substituent group?	IUPAC Nomenclature	View
1610	If the first substituent is equidistant from both ends, how is the numbering di…	IUPAC Nomenclature	View
1611	Which prefix is used to indicate the presence of three identical substituents?	IUPAC Nomenclature	View
1612	How are substituents ordered when writing the final IUPAC name?	IUPAC Nomenclature	View
1613	Which punctuation is used to separate two numbers in an IUPAC name?	IUPAC Nomenclature	View
1614	Which of the following prefixes is NOT ignored when alphabetizing substituents?	IUPAC Nomenclature	View
1615	Between an alcohol and an alkene, which functional group has higher priority fo…	IUPAC Nomenclature	View
1616	What must the parent chain of an alkene always contain?	IUPAC Nomenclature	View
1617	What is the term for a compound containing both a double bond and a hydroxyl gr…	IUPAC Nomenclature	View
1618	When an alcohol group is on a ring, which carbon is always designated as C1?	IUPAC Nomenclature	View
1619	What is a compound with two hydroxyl groups called?	IUPAC Nomenclature	View
1620	In alkene stereochemistry, what does 'cis' indicate?	IUPAC Nomenclature	View
1621	Which letter represents the 'Z' isomer in the E/Z nomenclature system?	IUPAC Nomenclature	View
1622	How are higher priority groups positioned in an 'E' isomer?	IUPAC Nomenclature	View
1623	What is the name for a compound containing both a double bond and a triple bond?	IUPAC Nomenclature	View
1624	How is the numbering direction determined for an enyne?	IUPAC Nomenclature	View
1625	Which functional group has the general formula RCHO?	IUPAC Nomenclature	View
1626	What is the suffix for a carboxylic acid?	IUPAC Nomenclature	View
1627	Which group uses the suffix '-one'?	IUPAC Nomenclature	View
1628	What is the structure of an ether?	IUPAC Nomenclature	View
1629	Which substituent is abbreviated as 'Ph-'?	IUPAC Nomenclature	View
1630	In the name '2-chloro-5-methylheptane', which substituent comes first alphabeti…	IUPAC Nomenclature	View
1631	What does a 'triol' contain?	IUPAC Nomenclature	View
1632	What is the parent name for a 12-carbon alkane?	IUPAC Nomenclature	View
1633	What happens if there is no free rotation about a bond?	IUPAC Nomenclature	View
1634	Which multiplier prefix means four?	IUPAC Nomenclature	View
1635	If substituents are at C3 and C5 when numbering from the left, and C3 and C5 wh…	IUPAC Nomenclature	View
1636	What is an alkyl group?	IUPAC Nomenclature	View
1637	What is the correct punctuation between a number and a letter in a name?	IUPAC Nomenclature	View
1638	What is the name for a 2-carbon alkyl group?	IUPAC Nomenclature	View
1639	Which of these is the correct general formula for an alkane?	IUPAC Nomenclature	View
1640	What is the suffix for an ester?	IUPAC Nomenclature	View
1641	What functional group is represented by $-NH_2$?	IUPAC Nomenclature	View
1642	In the name '3-methylcyclohexanol', why is there no '1' before 'ol'?	IUPAC Nomenclature	View
1643	How are two triple bonds in one molecule indicated?	IUPAC Nomenclature	View
1644	Which group has the suffix '-al'?	IUPAC Nomenclature	View
1645	What is the parent name for a 20-carbon alkane?	IUPAC Nomenclature	View
1646	How many bonds must every carbon atom have in a structural drawing?	IUPAC Nomenclature	View
1647	What is the suffix for an amide?	IUPAC Nomenclature	View
1648	What is the priority order for numbering if an alcohol and alkane are present?	IUPAC Nomenclature	View
1649	Which prefix means 'opposite' in E/Z nomenclature?	IUPAC Nomenclature	View
1650	What is the identity of a $CH_3-$ group?	IUPAC Nomenclature	View
1651	How is a triple bond indicated in a name?	IUPAC Nomenclature	View
1652	What is the term for two different longest chains of the same length?	IUPAC Nomenclature	View
1653	Which multiplier prefix is used for two identical groups?	IUPAC Nomenclature	View
1654	What functional group is represented by $-NO_2$?	IUPAC Nomenclature	View
1655	What is the common name for 1,2-ethanediol?	IUPAC Nomenclature	View
1656	What is the definition of organic chemistry?	Introduction to Organic Chemistry and Allotropes of Carbon	View
1657	What was the vital force theory?	Introduction to Organic Chemistry and Allotropes of Carbon	View
1658	Why is graphite a good conductor of electricity?	Introduction to Organic Chemistry and Allotropes of Carbon	View
1659	Which allotrope of carbon is used in cutting tools and jewelry because it is th…	Introduction to Organic Chemistry and Allotropes of Carbon	View
1660	Which allotrope of carbon is used as a moderator in nuclear reactors?	Introduction to Organic Chemistry and Allotropes of Carbon	View
1661	What is the melting point of diamond?	Introduction to Organic Chemistry and Allotropes of Carbon	View
1662	Which field has fullerenes significantly impacted in the 21st century?	Introduction to Organic Chemistry and Allotropes of Carbon	View
1663	Why is organic chemistry important in medicine?	Introduction to Organic Chemistry and Allotropes of Carbon	View
1664	What is the hybridization of carbon atoms in fullerenes like C₆₀?	Introduction to Organic Chemistry and Allotropes of Carbon	View
1665	Which physical property is common to both graphite and fullerenes?	Introduction to Organic Chemistry and Allotropes of Carbon	View
1666	What is the significance of the unhybridized p orbital in sp² hybridized carbon?	Electronic Theory in Organic Chemistry	View
1667	The principle of crystallization relies on the fact that:	Isolation and Purification of Organic Compounds	View
1668	Which chromatographic technique is most useful for quickly checking the purity …	Isolation and Purification of Organic Compounds	View
1669	What is the general formula for carbonates formed by alkali metals?	Sblock elements	View
1670	What is hydrated sodium carbonate (Na₂CO₃.10H₂O) commonly known and used as?	Sblock elements	View
1671	Which of the following is a common laboratory method for preparing aldehydes?	Carbonyl Compounds	View
1672	When performing a recrystallization, if crystals do not form upon cooling, what…	Isolation and Purification of Organic Compounds	View
1673	In steam distillation, the total vapor pressure equals:	Isolation and Purification of Organic Compounds	View
1674	What is the product when an aldehyde reacts with Tollens' reagent?	Carbonyl Compounds	View
1675	Which of the following is an advantage of steam distillation over simple distil…	Isolation and Purification of Organic Compounds	View
1676	In liquid-liquid extraction, if a compound is more soluble in the organic layer…	Isolation and Purification of Organic Compounds	View
1677	What is the name of the glassware used for liquid-liquid extraction?	Isolation and Purification of Organic Compounds	View
1678	Which of the following pairs are commonly separated by simple distillation?	Isolation and Purification of Organic Compounds	View
1679	In chromatography, the mobile phase is:	Isolation and Purification of Organic Compounds	View
1680	In recrystallization, if too much solvent is used, what will happen?	Isolation and Purification of Organic Compounds	View
1681	Filtration is often used in conjunction with which other purification technique?	Isolation and Purification of Organic Compounds	View
1682	What is the product when an aldehyde reacts with Fehling's solution?	Carbonyl Compounds	View
1683	Which of the following statements about Rf values is TRUE?	Isolation and Purification of Organic Compounds	View
1684	What is the bond length of a typical C=O bond?	Carbonyl Compounds	View
1685	In distillation, what is the purpose of the condenser?	Isolation and Purification of Organic Compounds	View
1686	What is the purpose of adding boiling chips or stones to a distillation flask?	Isolation and Purification of Organic Compounds	View
1687	Which technique would be best for separating a mixture of a solid that sublimes…	Isolation and Purification of Organic Compounds	View
1688	In vacuum distillation, the pressure is reduced to:	Isolation and Purification of Organic Compounds	View
1689	What is the bond energy of a typical C=O bond?	Carbonyl Compounds	View
1690	Which of the following is an example of a stationary phase in gas chromatograph…	Isolation and Purification of Organic Compounds	View
1691	Why are aldehydes more reactive than ketones toward nucleophilic addition?	Carbonyl Compounds	View
1692	What is the product when an aldehyde reacts with an alcohol in the presence of …	Carbonyl Compounds	View
1693	What is a hemiacetal?	Carbonyl Compounds	View
1694	Which of the following is a meta-directing group in electrophilic aromatic subs…	Carbonyl Compounds	View
1695	What is the product of the Friedel-Crafts acylation of benzene with acetyl chlo…	Carbonyl Compounds	View
1696	What is the bond angle in an sp hybridized carbon?	Electronic Theory in Organic Chemistry	View
1697	What is the industrial preparation of ethanal (acetaldehyde) from ethyne?	Carbonyl Compounds	View
1698	What is the industrial preparation of propanone (acetone)?	Carbonyl Compounds	View
1699	Which of the following statements about the polarity of the carbonyl group is T…	Carbonyl Compounds	View
1700	What percentage s-character does an sp³ hybrid orbital have?	Electronic Theory in Organic Chemistry	View

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Questions (2006)