Question bank

Filter questions by subject, topic and difficulty. Open any question to answer it and see the explanation.

Clear

245 questions found · practise this subject as a set Show 20 · 50 per page

#	Question	Subject and topic	Difficulty
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