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#	Question	Subject and topic	Difficulty
151	What is the main product of acid-catalysed hydration of propene?	Chemistry Preparation of alcohols and phenols	Easy
152	Which pair of products is formed in the cumene process?	Chemistry Preparation of alcohols and phenols	Easy
153	Which method converts propene into propan-1-ol?	Chemistry Preparation of alcohols and phenols	Medium
154	Which carbonyl compound gives a primary alcohol other than methanol when treated with CH₃MgBr followed by hyd…	Chemistry Preparation of alcohols and phenols	Medium
155	A student wants 2-methylpropan-2-ol using a Grignard reagent. Which combination is suitable?	Chemistry Preparation of alcohols and phenols	Hard
156	Why does ethanol have a much higher boiling point than methoxymethane, although both are C₂H₆O?	Chemistry Properties of alcohols	Easy
157	Which alcohol gives turbidity immediately with Lucas reagent at room temperature?	Chemistry Properties of alcohols	Easy
158	What product is obtained when propan-2-ol vapour is passed over heated copper at 573 K?	Chemistry Properties of alcohols	Medium
159	Which reagent oxidises a primary alcohol to an aldehyde without further oxidation to a carboxylic acid?	Chemistry Properties of alcohols	Medium
160	Arrange methanol, propan-2-ol and 2-methylpropan-2-ol in decreasing order of acidity.	Chemistry Properties of alcohols	Hard
161	What is formed when phenol is treated with bromine water?	Chemistry Properties of phenols	Easy
162	Which product is obtained in the Reimer–Tiemann reaction of phenol?	Chemistry Properties of phenols	Easy
163	Why is phenol more acidic than ethanol?	Chemistry Properties of phenols	Medium
164	Which compound is the most acidic?	Chemistry Properties of phenols	Medium
165	Why can o-nitrophenol be separated from p-nitrophenol by steam distillation?	Chemistry Properties of phenols	Hard
166	What is the reaction of an alkyl halide with a sodium alkoxide to form an ether called?	Chemistry Ethers	Easy
167	What are the products when anisole is heated with HI?	Chemistry Ethers	Easy
168	Why do ethers have much lower boiling points than isomeric alcohols?	Chemistry Ethers	Medium
169	Which pair of reactants is best for preparing tert-butyl methyl ether by Williamson synthesis?	Chemistry Ethers	Medium
170	What are the main products when methyl tert-butyl ether, (CH₃)₃C–O–CH₃, is treated with HI?	Chemistry Ethers	Hard
171	Why is methanol called "wood spirit"?	Chemistry Commercially important alcohols	Easy
172	Which enzyme in yeast converts glucose into ethanol and carbon dioxide?	Chemistry Commercially important alcohols	Easy
173	What substances are added to make denatured alcohol?	Chemistry Commercially important alcohols	Medium
174	Why is air excluded during the fermentation of sugar to ethanol?	Chemistry Commercially important alcohols	Medium
175	Methanol is manufactured industrially by which reaction?	Chemistry Commercially important alcohols	Hard
176	What is the hybridisation of the carbonyl carbon atom in propanone?	Chemistry The carbonyl group	Easy
177	What is the IUPAC name of CH₃CH₂COCH₃?	Chemistry The carbonyl group	Easy
178	Why do nucleophiles attack the carbon atom of a carbonyl group?	Chemistry The carbonyl group	Medium
179	What is the IUPAC name of CH₃CH(CH₃)CH₂CHO?	Chemistry The carbonyl group	Medium
180	Which compound is named β-chlorobutyraldehyde in the common system?	Chemistry The carbonyl group	Hard
181	Which reagent converts benzoyl chloride into benzaldehyde?	Chemistry Preparation of aldehydes and ketones	Easy
182	What is the product when ethyne is passed into dilute H₂SO₄ containing HgSO₄?	Chemistry Preparation of aldehydes and ketones	Easy
183	In the Etard reaction, toluene is converted into benzaldehyde using which reagent?	Chemistry Preparation of aldehydes and ketones	Medium
184	Which combination gives propanone after hydrolysis?	Chemistry Preparation of aldehydes and ketones	Medium
185	Ozonolysis of an alkene followed by Zn/H₂O gives only propanone. What is the alkene?	Chemistry Preparation of aldehydes and ketones	Hard
186	Which compound gives a positive iodoform test?	Chemistry Reactions of aldehydes and ketones	Easy
187	Which reagent distinguishes ethanal from propanone?	Chemistry Reactions of aldehydes and ketones	Easy
188	Which aldehyde undergoes the Cannizzaro reaction with concentrated NaOH?	Chemistry Reactions of aldehydes and ketones	Medium
189	What mass of silver (Ag = 108 g mol⁻¹) is deposited when 0.1 mol of ethanal is fully oxidised by Tollens' rea…	Chemistry Reactions of aldehydes and ketones	Medium
190	What is the final product when ethanal is warmed with dilute NaOH?	Chemistry Reactions of aldehydes and ketones	Hard
191	Which test distinguishes ethanoic acid from phenol?	Chemistry Carboxylic acids	Easy
192	What product is obtained when sodium propanoate is heated with soda-lime?	Chemistry Carboxylic acids	Easy
193	Which of these acids is the strongest?	Chemistry Carboxylic acids	Medium
194	What mass of CO₂ is released when 6.0 g of ethanoic acid reacts completely with excess NaHCO₃?	Chemistry Carboxylic acids	Medium
195	Ethylbenzene is heated with alkaline KMnO₄ and then acidified. What is the product?	Chemistry Carboxylic acids	Hard
196	Formalin, used to preserve biological specimens, is an aqueous solution of which compound?	Chemistry Uses	Easy
197	Which compound is commonly used as a food preservative?	Chemistry Uses	Easy
198	Which carboxylic acid is a monomer used in the manufacture of nylon-6,6?	Chemistry Uses	Medium
199	A factory needs a carbonyl compound to react with phenol to make Bakelite. Which should it use?	Chemistry Uses	Medium
200	Which acid is used in the leather, textile and electroplating industries?	Chemistry Uses	Hard