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Class 12 Chemistry (Part Ii) Chapter 12 Aldehydes Quiz 4 (25 MCQs)

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1. Carboxylic acids react with carbonates to release which gas?
2. Which test confirms the presence of carbon dioxide?
3. Which reagent is used in Fehling's test?
4. Hydrocarbons are formed when aldehydes and ketones are reacted with amalgamated zinc and conc. HCl. The reaction is called
5. Tollens' reagent shows the following colour change in an aldehyde
6. When reacted with an oxidising agent, primary alcohols initially turn into
7. Describe the physical state of carboxylic acids at room temperature.
8. When a secondary alcohol reacts with acidified dichromate:
9. Which of these are uses of alcohols?
10. Which of these compounds does not react with Benedicts reagent?
11. If propanal reacts with KCN in acidic conditions, which of the following is true?
12. Which substituent on an unsymmetrical carbonyl group would more rapidly undergo rearrangement in a Baeyer-Villiger Oxidation?
13. What charge do the orange potassium dichromate ions have?
14. Which of the following is a characteristic reaction of carboxylic acids?
15. What is the observation when Acetone is mixed with Sodium nitroprusside and NaOH?
16. What is the product of ozonolysis of alkenes that contain a double bond adjacent to a carbonyl group?
17. CH$_{3}$CH=CHCH$_{2}$CH$_{2}$OH $\rightarrow$ CH$_{3}$CH=CHCH$_{2}$COOHThe most suitable reagent for this reaction is
18. The general formula for an ester is:-
19. What is the primary method for the oxidation of primary alcohols to aldehydes?
20. Which of the following would undergo Cannizzaro reaction?
21. Which of the following is used in Rosenmund reduction?
22. Carboxylic acids can be prepared by
23. Upon oxidation with hot acidified KMnO$_{4, }$ aldehydes turn into .....
24. 2HCHO + conc. NaOH$\rightarrow$ CH$_{3}$OH + HCOONa is
25. Which reagent is commonly used for the reduction of carboxylic acids to aldehydes?
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