General Organic Chemistry: JEE Main Chemistry Previous Year Questions

724 previous year questions from General Organic Chemistry. Here are the 25 most important ones; open any question for the correct answer and a full step-by-step solution.

1. 1.In Carius method of estimation of halogen, 0.25 g of an organic compound gave 0.15 g of silver bromide $\text{(}\text{AgBr}\text{)}$. The percentage of Bromine in the or…
2. 2.The compound that will react most readily with NaOH to form methanol is
3. 3.Which of the following compounds is not chiral ?
4. 4.Which among the following purification methods is based on the principle of "Solubility" in two different solvents?
5. 5.The correct pair(s) of the ambident nucleophiles is (are): (A) $\text{AgCN}/\text{KCN}$ (B) $\text{RCOOAg}/\text{RCOOK}$ $\text{(}C\text{)}$…
6. 6.The correct decreasing order of priority for the functional groups of organic compounds in the IUPAC system of nomenclature is:
7. 7.Following Kjeldahl's method, $1g$ of organic compound released ammonia, that neutralised $10\text{mL}$ of $2{\text{MH}}_2{\text{SO}}_4$. The percentage of nitrogen…
8. 8.From the following, the least stable structure is:
9. 9.Phenyl magnesium bromide reacts with methanol to give –
10. 10.Given below are two statements: Statement I: Hyperconjugation is not a permanent effect. Statement II: In general, greater the number of alkyl groups attached to a positi…
11. 11.Which of the following is used in the estimation of carbon monoxide?
12. 12.Which of the following has the shortest $C$ - $\text{Cl}$ bond?
13. 13.In the estimation of bromine, 0.5 g of an organic compound gave 0.40 g of silver bromide. The percentage of bromine in the given compound is _________% (nearest integer)…
14. 14.The order of decreasing reactivity towards an electrophilic reagent, for the following would be (i) benzene (ii) toluene (iii) chlorobenzene (iv) phenol
15. 15.The correct order of basic strength of CH3NH2(I), (CH3)2NH(II), (CH3)3N(III), C6H5CH2NH2(IV) in gaseous phase is -
16. 16.An organic compound is estimated through Dumas method and was found to evolve 6 moles of ${\text{CO}}_2$, 4 moles of $H_{2}O$ and 1 mole of nitrogen gas. The formul…
17. 17.In Dumas method one gram of carbon compound gives $50\text{mL}$ of $N_2$ at $300K$ and $740\text{mmHg}$ pressure. If the aqueous tension at $300K$ is…
18. 18.CORRECT order of stability for the following is ${\text{CH}}_2={\text{CH}}^{-}\text{,}{\text{CH}}_3-{\text{CH}}_2^{-}\text{,}\text{CH}\text{≡}{C}^{-}$
19. 19.Using Kjeldahl's method over $1g$ of a soil sample, the ammonia evolved could neutralise $25\text{mL}$ of $1{\text{MH}}_2{\text{SO}}_4$. Then, the percentage of ni…
20. 20.The adsorbent used in adsorption chromatography is/are – A. silica gel B. alumina C. quick lime D. magnesia Choose the most appropriate answer from the options given belo…
21. 21.${\text{CH}}_3-\text{CH}=\text{CH}-{\text{CH}}_2\text{OH}\to \text{PCC}{\text{CH}}_3-\text{CH}=\text{CH}-\text{CHO}$Hybridisation change involved at $C-1$ in the…
22. 22.Which of the following is not explained by hyperconjugation?
23. 23.Which of the following is the most stable carbocation (carbonium ion)?
24. 24.On a thin layer chromatographic plate, an organic compound moved by $3.5\text{cm}$, while the solvent moved by $5\text{cm}$. The retardation factor of the organic compo…
25. 25.Using column chromatography, mixture of two compounds 'A' and 'B' was separated. 'A' eluted first, this indicates 'B' has