Objective Questions

Questions (2006)

#	Question	Topic	Actions
1701	The separation of a mixture of two immiscible liquids can also be achieved by s…	Isolation and Purification of Organic Compounds	View
1702	Which of the following is NOT a typical use of separation techniques in organic…	Isolation and Purification of Organic Compounds	View
1703	What percentage s-character does an sp² hybrid orbital have?	Electronic Theory in Organic Chemistry	View
1704	What percentage s-character does an sp hybrid orbital have?	Electronic Theory in Organic Chemistry	View
1705	Which type of bond is stronger?	Electronic Theory in Organic Chemistry	View
1706	What is the product when benzaldehyde is treated with alkaline KMnO₄?	Carbonyl Compounds	View
1707	What does VSEPR theory stand for?	Electronic Theory in Organic Chemistry	View
1708	During recrystallization, if colored impurities are present, what can be added …	Isolation and Purification of Organic Compounds	View
1709	In VSEPR theory, which repels more strongly?	Electronic Theory in Organic Chemistry	View
1710	What is the molecular geometry of a central atom with four bonding pairs and ze…	Electronic Theory in Organic Chemistry	View
1711	Which type of chromatography separates based on molecular size (sieving effect)?	Isolation and Purification of Organic Compounds	View
1712	What is the mobile phase in column chromatography?	Isolation and Purification of Organic Compounds	View
1713	Which of the following is a common drying agent used to remove traces of water …	Isolation and Purification of Organic Compounds	View
1714	The process of converting a solid directly to a gas without passing through the…	Isolation and Purification of Organic Compounds	View
1715	How many π bonds are present in a carbon‑carbon triple bond?	Alkynes: Structure, Bonding, and Nomenclature	View
1716	What is the IUPAC name for CH₃CH₂C≡CH?	Alkynes: Structure, Bonding, and Nomenclature	View
1717	Why is the C–H bond of a terminal alkyne more acidic than the C–H bonds of alka…	Alkynes: Structure, Bonding, and Nomenclature	View
1718	Which reagent is used to test for terminal alkynes by forming a white precipita…	Alkynes: Structure, Bonding, and Nomenclature	View
1719	What product is obtained from the reaction of calcium carbide (CaC₂) with water?	Alkynes: Structure, Bonding, and Nomenclature	View
1720	What type of isomerism exists between 1‑butyne and 2‑butyne?	Alkynes: Structure, Bonding, and Nomenclature	View
1721	What is the approximate pKa of a terminal alkyne (e.g., ethyne)?	Alkynes: Structure, Bonding, and Nomenclature	View
1722	What is the product when 1‑butyne is treated with NaNH₂ in liquid NH₃?	Alkynes: Structure, Bonding, and Nomenclature	View
1723	Which reaction allows an internal alkyne to be prepared from a terminal alkyne?	Alkynes: Structure, Bonding, and Nomenclature	View
1724	Which test gives a yellow precipitate of iodoform (CHI₃) with methyl ketones?	Qualitative and Quantitative Analysis in Organic Chemistry	View
1725	What is the major product of the hydration of 1‑butyne (CH₃CH₂C≡CH) with HgSO₄/…	Alkynes: Structure, Bonding, and Nomenclature	View
1726	Which catalyst is used for the partial hydrogenation of an alkyne to a cis‑alke…	Alkynes: Structure, Bonding, and Nomenclature	View
1727	What is the product when an internal alkyne is reduced with sodium in liquid am…	Alkynes: Structure, Bonding, and Nomenclature	View
1728	How many equivalents of H₂ are required to fully hydrogenate an alkyne to an al…	Alkynes: Structure, Bonding, and Nomenclature	View
1729	What is the product of ozonolysis (O₃ followed by H₂O) of 2‑butyne (CH₃C≡CCH₃)?	Alkynes: Structure, Bonding, and Nomenclature	View
1730	Why do alkynes react with Br₂ but alkanes do not under normal conditions?	Alkynes: Structure, Bonding, and Nomenclature	View
1731	What is the major product when propyne (CH₃C≡CH) reacts with one equivalent of …	Alkynes: Structure, Bonding, and Nomenclature	View
1732	Which base is strong enough to deprotonate a terminal alkyne (pKa ≈ 25)?	Alkynes: Structure, Bonding, and Nomenclature	View
1733	What hybridization change occurs when an alkyne is partially hydrogenated to an…	Alkynes: Structure, Bonding, and Nomenclature	View
1734	What is the product of the reaction of sodium acetylide (HC≡CNa) with 1‑bromopr…	Alkynes: Structure, Bonding, and Nomenclature	View
1735	Which alkyne is also known as dimethylacetylene?	Alkynes: Structure, Bonding, and Nomenclature	View
1736	What is the product when 2‑butyne is treated with excess Br₂?	Alkynes: Structure, Bonding, and Nomenclature	View
1737	Which method is used to prepare an alkyne from a vicinal dihalide?	Alkynes: Structure, Bonding, and Nomenclature	View
1738	What is the molecular geometry of a central atom with three bonding pairs and o…	Electronic Theory in Organic Chemistry	View
1739	What does the 2,4-dinitrophenylhydrazine (2,4-DNPH) test detect?	Qualitative and Quantitative Analysis in Organic Chemistry	View
1740	What product is formed when ethylmagnesium bromide (CH₃CH₂MgBr) reacts with pro…	Alkynes: Structure, Bonding, and Nomenclature	View
1741	What type of precipitate is formed when a terminal alkyne reacts with Cu₂Cl₂ in…	Alkynes: Structure, Bonding, and Nomenclature	View
1742	What is the molecular formula of a cyclic alkyne with 5 carbons (e.g., cyclopen…	Alkynes: Structure, Bonding, and Nomenclature	View
1743	Which reaction is used to synthesize higher alkynes from lower alkynes?	Alkynes: Structure, Bonding, and Nomenclature	View
1744	What is the common name for HC≡C–CH₂–CH₂–CH₃?	Alkynes: Structure, Bonding, and Nomenclature	View
1745	What is the product when 2‑butyne is hydrogenated with H₂ / Lindlar’s catalyst?	Alkynes: Structure, Bonding, and Nomenclature	View
1746	What is the product when 2‑butyne is reduced with Na/NH₃ (liquid)?	Alkynes: Structure, Bonding, and Nomenclature	View
1747	What type of products are obtained from the reductive ozonolysis of an alkyne?	Alkynes: Structure, Bonding, and Nomenclature	View
1748	What is the molar mass of barium sulfate (BaSO₄) used in sulfur calculations?	Qualitative and Quantitative Analysis in Organic Chemistry	View
1749	Why do only terminal alkynes react with AgNO₃/NH₃?	Alkynes: Structure, Bonding, and Nomenclature	View
1750	What is the product when acetylene reacts with two equivalents of HBr?	Alkynes: Structure, Bonding, and Nomenclature	View
1751	Which statement about the carbon–carbon triple bond is FALSE?	Alkynes: Structure, Bonding, and Nomenclature	View
1752	What is the major product when ethylamine is treated with excess CH₃I?	Alkynes: Structure, Bonding, and Nomenclature	View
1753	What is the name of the rule that predicts the major product in elimination rea…	Alkynes: Structure, Bonding, and Nomenclature	View
1754	Which reagent converts an alkene to an aldehyde with one fewer carbon (oxidativ…	Alkynes: Structure, Bonding, and Nomenclature	View
1755	What stereochemistry results from syn hydroxylation of an alkene with OsO₄?	Alkynes: Structure, Bonding, and Nomenclature	View
1756	What is the molecular geometry of a central atom with two bonding pairs and two…	Electronic Theory in Organic Chemistry	View
1757	What is the major product from the reaction of 2‑methylpropene with H₂O in the …	Alkynes: Structure, Bonding, and Nomenclature	View
1758	What is the common name for (CH₃)₂C=CH₂?	Alkynes: Structure, Bonding, and Nomenclature	View
1759	What is the name of the rule that predicts the major product of elimination as …	Alkynes: Structure, Bonding, and Nomenclature	View
1760	What is the product when an unsymmetrical alkene undergoes anti‑Markovnikov add…	Alkynes: Structure, Bonding, and Nomenclature	View
1761	What is the product of catalytic hydrogenation of 2‑butene?	Alkynes: Structure, Bonding, and Nomenclature	View
1762	What is the test for unsaturation that involves decolorization of brown bromine…	Alkynes: Structure, Bonding, and Nomenclature	View
1763	What is the 3D shape around the carbon atoms in an alkyne?	Alkynes: Structure, Bonding, and Nomenclature	View
1764	What is the correct IUPAC name for the compound CH₃CH₂C≡CCH₃?	Alkynes: Structure, Bonding, and Nomenclature	View
1765	What is the functional group present in amines?	Fundamentals of Amines: Nomenclature, Isomerism, and Synthesis	View
1766	What is the IUPAC name for CH₃CH₂CH₂NH₂?	Fundamentals of Amines: Nomenclature, Isomerism, and Synthesis	View
1767	What is the common name for (CH₃)₃N?	Fundamentals of Amines: Nomenclature, Isomerism, and Synthesis	View
1768	What type of amine is aniline (C₆H₅NH₂)?	Fundamentals of Amines: Nomenclature, Isomerism, and Synthesis	View
1769	For the ammonolysis of alkyl halides to proceed efficiently via SN₂, the alkyl …	Fundamentals of Amines: Nomenclature, Isomerism, and Synthesis	View
1770	What is the product of the reduction of a nitrile (R-C≡N) with LiAlH₄?	Fundamentals of Amines: Nomenclature, Isomerism, and Synthesis	View
1771	Reduction of nitroalkanes (R-NO₂) with Sn/HCl produces:	Fundamentals of Amines: Nomenclature, Isomerism, and Synthesis	View
1772	In the carbylamine reaction, what is the product when methylamine reacts with C…	Fundamentals of Amines: Nomenclature, Isomerism, and Synthesis	View
1773	Which of the following amines has the highest boiling point for similar molecul…	Fundamentals of Amines: Nomenclature, Isomerism, and Synthesis	View
1774	According to the document, what is the definition of radioactivity?	Radioactivity	View
1775	Which of the following elements are mentioned as examples of unstable atoms tha…	Radioactivity	View
1776	Based on the 'Properties of radiation' table, what is the nature of alpha (α) r…	Radioactivity	View
1777	What is the penetrating power of gamma (γ) rays compared to alpha and beta rays…	Radioactivity	View
1778	What material is typically used to stop beta (β) rays, as indicated in the 'Pro…	Radioactivity	View
1779	What is the definition of a Becquerel (Bq) as a unit of radioactivity?	Radioactivity	View
1780	According to the document, what is the quality factor for an alpha (α) ray?	Radioactivity	View
1781	What is the primary characteristic that distinguishes a nuclear reaction from a…	Radioactivity	View
1782	In any nuclear reaction, what must be conserved on both sides of the equation?	Radioactivity	View
1783	Which of the following is NOT listed as equipment used for the detection and me…	Radioactivity	View
1784	What is the definition of half-life in the context of radioactive isotopes?	Radioactivity	View
1785	Is the value of half-life dependent on the amount of isotope present?	Radioactivity	View
1786	During an alpha (α) decay, how are the atomic mass and atomic number of the par…	Radioactivity	View
1787	In beta (β) decay, how does the atomic number of the parent nucleus change?	Radioactivity	View
1788	Which of the following is listed as an application of radioactivity?	Radioactivity	View
1789	According to the provided document, what is the nature of an alpha (α) particle?	Radioactivity	View
1790	Based on the properties of radiation, how is the penetrating power of gamma (γ)…	Radioactivity	View
1791	What material is typically used to stop beta (β) particles, according to the do…	Radioactivity	View
1792	According to the 'Units of radioactivity' table, what does one Becquerel (Bq) r…	Radioactivity	View
1793	What is the quality factor for alpha (α) rays, as specified in the document?	Radioactivity	View
1794	In a nuclear reaction, which quantities must be the same on both sides of the e…	Radioactivity	View
1795	Which of the following is NOT listed as a type of equipment used for the detect…	Radioactivity	View
1796	What specific aspect does the 'half-life' of a radioactive isotope refer to?	Radioactivity	View
1797	How does the amount of a radioactive isotope (e.g., 1 g vs. 1000 g of ²⁴	Radioactivity	View
1798	In the radioactive decay law equation, N_t = N₀ × exp(-λt)…	Radioactivity	View
1799	What is the mathematical relationship between the half-life (t_1/2) a…	Radioactivity	View
1800	During alpha (α) decay, how do the atomic mass number and atomic number of the …	Radioactivity	View

Page 18 of 21

Quick Actions

Practice

Learning Tools

Stats & Progress

Community

Questions (2006)