19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
Assertion:1-butene on reaction with HBr in the presence of a peroxide produces 1-bromobutane. Reason: It involves the formation of a primary radical.
Assertion: The addition of HBr on 2-butene gives two isomeric products. Reason: Addition of HBr on 2-butene follows Markownikoff’s rule.
For the formation of toluene by Friedal Craft reaction, reactants used in presence of anhydrous AlCl3 are
Select the true statement about benzene amongst the following
Which among the following groups when attached to benzene ring will direct the incoming electrophile predominantly to the meta position? (I) – CH3 (II) –CH2Cl (III) (IV) –CCl3 (V) –NHCOCH3
Product The main product is (a) (b) (c) (d)
Ethylbenzene with bromine in presence of FeBr3, predominantly gives (a) (b) (c) (d)
An aromatic compound ‘X’ with molecular formula C8H10 on nitration gives one mononitro derivative and three dinitro derivatives. Compound ‘X’ would be
The compound X in the reaction, (a) (b) (c) (d)
Which of the following sequence of reactions (reagents) can be used for the conversion of C6H5CH2CH3 into C6H5CH=CH2?
Which is not aromatic compound? _
Among the following, the aromatic comopound is: (a) (b) (c) (d)
Reduction of 2-butyne with sodium in liquid ammonia gives predominantly :
The product A, is (a) (b) (c) (d)
Acetylenic hydrogens are acidic because
CH CH CH
A hydrocarbon A on chlorination gives B which on heating with alcoholic potassium hydroxide changes into another hydrocarbon C. The latter decolourises Baeyer's reagent and on ozonolysis forms formaldehyde only. A is
In the presence of platinum catalyst, hydrocarbon A adds hydrogen to form n-hexane. When hydrogen bromide is added to A instead of hydrogen, only a single bromo compound Is formed. Which of the following is A? (a) CH …
When 3, 3-dimethyl 2-butanol is heated with H2SO4, the major product obtained is
When hydrochloric acid gas is treated with propene in presence of benzoyl peroxide, it gives.
The reagent is Reagent R CH CCl R R C C R ->
Consider the following statements : A hydrocarbon of molecular formula C5H10 is a I. monosubstituted alkene II. disubstituted alkene III. trisubstituted alkene Which of the following statement(s) is(are) correct?
Which one of the following reactions is expected to readily give a hydrocarbon product in good yields? (a) Electrolytic RCOOK oxidation -> (b) Br2 RCOO Ag -> (c) Br2 RCOO Ag ->
In the given reactions : Br Na,ether Na,ether (i)CH Br X Y Z hv Br NaOH NaOH (ii)CH COOH X Y Z CaO hv -> -> -> -> -> -> Identify X, Y and Z. X Y Z
Match the column I with column II and mark the appropriate choice. Column I Column II (A) n-butane 2-methylpropane (i) Free radical substitution (B) hv CH Cl CH Cl -> (ii) Wurtz reaction (C) RCOONa + soda lime RH (…