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#QuestionSubject and topicDifficulty
2161 What are the products when anisole is heated with HI? Chemistry
Ethers		 Easy
2162 Why do ethers have much lower boiling points than isomeric alcohols? Chemistry
Ethers		 Medium
2163 Which pair of reactants is best for preparing tert-butyl methyl ether by Williamson synthesis? Chemistry
Ethers		 Medium
2164 What are the main products when methyl tert-butyl ether, (CH₃)₃C–O–CH₃, is treated with HI? Chemistry
Ethers		 Hard
2165 Why is methanol called "wood spirit"? Chemistry
Commercially important alcohols		 Easy
2166 Which enzyme in yeast converts glucose into ethanol and carbon dioxide? Chemistry
Commercially important alcohols		 Easy
2167 What substances are added to make denatured alcohol? Chemistry
Commercially important alcohols		 Medium
2168 Why is air excluded during the fermentation of sugar to ethanol? Chemistry
Commercially important alcohols		 Medium
2169 Methanol is manufactured industrially by which reaction? Chemistry
Commercially important alcohols		 Hard
2170 What is the hybridisation of the carbonyl carbon atom in propanone? Chemistry
The carbonyl group		 Easy
2171 What is the IUPAC name of CH₃CH₂COCH₃? Chemistry
The carbonyl group		 Easy
2172 Why do nucleophiles attack the carbon atom of a carbonyl group? Chemistry
The carbonyl group		 Medium
2173 What is the IUPAC name of CH₃CH(CH₃)CH₂CHO? Chemistry
The carbonyl group		 Medium
2174 Which compound is named β-chlorobutyraldehyde in the common system? Chemistry
The carbonyl group		 Hard
2175 Which reagent converts benzoyl chloride into benzaldehyde? Chemistry
Preparation of aldehydes and ketones		 Easy
2176 What is the product when ethyne is passed into dilute H₂SO₄ containing HgSO₄? Chemistry
Preparation of aldehydes and ketones		 Easy
2177 In the Etard reaction, toluene is converted into benzaldehyde using which reagent? Chemistry
Preparation of aldehydes and ketones		 Medium
2178 Which combination gives propanone after hydrolysis? Chemistry
Preparation of aldehydes and ketones		 Medium
2179 Ozonolysis of an alkene followed by Zn/H₂O gives only propanone. What is the alkene? Chemistry
Preparation of aldehydes and ketones		 Hard
2180 Which compound gives a positive iodoform test? Chemistry
Reactions of aldehydes and ketones		 Easy