19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
Assertion: Chloral reacts with phenyl chloride to form DDT. Reason: It is an electrophilic substitution reaction
Assertion: A dichlorobenzene is slightly more reactive than chlorobenzene towards an aromatic nucleophilic substitution reaction. Reason: Chlorine has electron withdrawing effect on aromatic ring.
Which of the following bases would give the best yield for the substitution product when reacted with 2-chloropropane?
Assertion: Consider the following synthesis CH3ONa + PhBr Path–II yields better yield of product than Path-I. Reason: CH3ONa is stronger base than PhONa.
Assertion: Benzyl bromide when kept in acetone – water, produces benzyl alcohol. Reason: The reaction follows SN2 mechanism.
Which of the following species is an electrophile?
Which of the following species is an electrophile?
Which of the following species is a nucleophile?
Which of the following species is a nucleophile? (a) CH O
Which of the following species is a nucleophile?
Which of the following species is a nucleophile?
The decreasing order of nucleophilicity among the nucleophiles
Consider the following groups (I) — OCOCH3 (II) — OCH3 (III) — OSO2CH3 (IV) — OSO2CF3 The decreasing order of their leaving ability is
Among these nucleophiles, which of the following orders is correct for their nucleophilicity order in gas phase? - CH , NH , OH ,F (a) - CH >NH >OH >F (b) F OH NH CH (c) - OH >NH >F >CH
Θ Θ Θ Θ C H , N H ,O H,F Among these nucleophiles, which of the following orders is correct for their nucleophilicity in acetone? (a) Θ Θ Θ Θ CH N H O H> F (b) F OH NH CH (c) Θ Θ Θ Θ O H> N H F CH
The order of reactivities of the following alkyl halides for a SN2 reaction is
Major product of the following reaction is: (a) (b) (c) (d)
(a) (b) (c) (d)
This reaction would follow which of the following pathway predominantly?
C6H6Cl6 is six membered cyclic compound in which each carbon carry one chlorine atom, on treatment with alcoholic KOH yields
1-pentene will be formed as major product when methoxide reacts with
What is true about the following reaction? (a)Only substitution product is formed. (b)Only elimination product is formed. (c)Both substitution and elimination products are formed and substitution dominates. (d)Both su…
The major alkene obtained when this alkyl halide is subjected to E1 reaction will be (a) (b) (c)
The major product obtained when this substrate is subjected to E1 reaction will (a) (b) (c)
The major product obtained when this substrate is subjected to E1 reaction will be (a) (b) (c)