StudyBeacon

Hyperconjugation in Organic Chemistry — Concept-Based Question Question 65: 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 positively charged carbon atom, greater is the hyperconjugation interaction and stabilization of the cation. In the light of the above statements, choose the correct answer from the options given below: (1) Statement I is true but Statement II is false (2) Both Statement I and Statement II are false (3) Statement I is false but Statement II is true (4) Both Statement I and Statement II are true See Answer Correct Answer: (3) Explanation: Hyperconjugation is a permanent electronic effect because no external reagent is required for its operation. Therefore, Statement I is false . As the number of alkyl groups i...

Essential Organic Reagents for JEE Advanced Understanding organic reagents and their functions is crucial for acing the JEE Advanced exam. These reagents are the key to mastering organic chemistry, and they play a significant role in various chemical transformations. In this post, we've compiled a comprehensive list of essential organic reagents that you'll need to be familiar with for your exam. Each reagent is explained with its function, example reactions, and chemical structure to help you get a clearer understanding. Reagent Function Example Reaction Structure Grignard Reagent (RMgX) Forms carbon-carbon bonds by acting as a nucleophile. Reaction with aldehydes to form secondary alcohols. Lithium Aluminum Hydride (LiAlH 4 ) Strong reducing agent; reduces esters, carboxylic acids, and amides to alcohols. Reduction of ethyl acetate to ethanol. ...

 Q. Among the following, total number of meta directing functional groups is - OCH3, NO2, CN, CH3-NHCOCH3, - COR, -OH, - COOH, -CI                                                             ( JEE mains 2024)  Show Answer Sol. (4)   -NO2,C=N, -COR, -COOH are meta directing. GOC PYQ

 Q. Among the given organic compounds, the total  number of aromatic compounds is                                                         ( JEE mains 2024)   Ans:- (3)    B.C and D are Aromatic Hydrocarbon

 Q. In final product number of methylene group (-CH 2-)                                                             ( JEE advance 2022) Show Answer Ans:- (2)

 Q. Which of the following statement is correct for paper chromatography?                                                         (JEE mains 2023) 1. Water present in the mobile phase gets absorbed by the paper which then forms the stationary phase. 2. Water present in the pores of the paper forms the stationary phase.  3. Paper sheet forms the stationary phase. 4.Paper and water present in its pores together form the stationary phase. Show Answer Ans: (2) Sol. In paper chromatography, a special quality paper known as chromatography paper is used. Paper contains water trapped in it, which acts as the stationary phase.

  Chemistry PYQ  Q. Which of the Phosphorus oxoacid can create silver mirror from AgNO3 solution ?                                                         (jee mains 2023) 1.  (HPO3)n  2. H4P2O5 3. H4P2O6 4.H4P2O7 Show Answer Oxyacid having P-H bond can reduce AgNO3 to Ag .

 Q. The correct statement regarding nucleophilic substitution reaction in a chiral alkyl halide is;                                                         (JEE mains 2024) 1. Retention occurs in S₁l reaction and inversion occurs in SN2 reaction. 2. Racemisation occurs in Snl reaction and retention occurs in SN2 reaction. 3. Racemisation occurs in both SN1 and SN2 reactions. 4.Racemisation occurs in SN1 reaction and inversion occurs in SN2 reaction. Show Answer (4)  SN¹- Racemisation   SN² - Inversion More Questions