Alcohols, Phenols & Ethers: JEE Main Chemistry Previous Year Questions

406 previous year questions from Alcohols, Phenols & Ethers. Here are the 25 most important ones; open any question for the correct answer and a full step-by-step solution.

1. 1.A better reagent to oxidize primary alcohols into aldehyde is
2. 2.Statements I : Bromination of phenol in solvent with low polarity such as ${\text{CHCl}}_3$ or ${\text{CS}}_2$ requires Lewis acid catalyst. Statements II : The Lew…
3. 3.The catalyst used in the preparation of an alkyl chloride by the action of dry $\text{HCl}$ on an alcohol is
4. 4.1-Propanol can be distinguished from 2-propanol by which test?
5. 5.Catalytic dehydrogenation of a primary alcohol gives a
6. 6.Which of the following has more ${\text{pK}}_a$ value?
7. 7.Formic acid is a stronger acid than acetic acid. This can be explained using
8. 8.Arrange the following phenols in decreasing order of their ${\text{pK}}_a$(A) Phenol(B) ortho-Nitrophenol(C) meta-Nitrophenol(D) para-Nitrophenol
9. 9.Match List-I with List-II (matching question)
10. 10.Phenolic group can be identified by a positive:
11. 11.Given below are two statements : Statement I : On heating with $KHS{O}_4$, glycerol is dehydrated and acrolein is formed. Statement II : Acrolein has fruity odour and can…
12. 12.Reaction by which benzaldehyde cannot be prepared is
13. 13.Reduction of ketones cannot be carried out with which of the following reagents?
14. 14.Given below are two statements: Statement (I): The boiling points of alcohols and phenols increase with increase in the number of C-atoms. Statement (II): The boiling poi…
15. 15.Given below are two statements. Statement I: Phenols are weakly acidic. Statement II: Therefore they are freely soluble in NaOH solution and are weaker acids than alcohol…
16. 16.The compound which gives turbidity immediately with Lucas reagent at room temperature is
17. 17.Which among the following reactions occurs by breaking of $C-O$ bond in alcohol?
18. 18.Given below are two statements: One is labelled as Assertion A and the other is labelled as Reason R: Assertion A: Alcohols react both as nucleophiles and electrophiles.…
19. 19.Which one is the most acidic compound? [NEET 2017]
20. 20.Which of the following compound has no reaction with sodium metal?
21. 21.Ceric ammonium nitrate and ${\text{CHCl}}_3/$alc.KOH are used for the identification of functional groups present in _______ and ______ respectively.
22. 22.Which one of the following phenols does not give colour when condensed with phthalic anhydride in presenceof conc. $H_{2}S{O}_4$?
23. 23.Increasing order of acid strength among $p$‐methoxyphenol, $p$ ‐methylphenol and $p$‐nitrophenol is
24. 24.Which of the following orders is true regarding the acidic nature of phenol?
25. 25.An organic compound ' $A$ ' burns with a sooty flame. It is negative towards Tollens' reagent test and positive for Borsche's reagent test. 'The compound ' $A$ ' is