AIIMS Chemistry Hydrocarbons Class 11 Questions

The final product formed is shown below: Ph−CH₂−CH≡CH−CH₃ (i) Br₂ → Ph−CH₂−CH−CH−CH₃ | Br (ii) Alc.KOH −2HBr → Ph−CH₂−C≡C−CH₃

Assertion: Propene reacts with HI in presence of peroxide give¹⁻iodopropane. Reason: 1° free radical is less stable than 2° free radical

The complete reaction is shown below.

The chemical reaction is shown below:

The chemical reaction is shown below: H₂C=CH₂ + HOCl → H₂C(OH)−CH₂(Cl) (X) → NaHCO₃ → CH₂OH−CH₂OH (Y)

The reactions that give methanides are as follows. Be₂C + 4H₂O → 2Be(OH)₂ + CH₄ CaC₂ + 2H₂O → Ca(OH)₂ + C₂H₂ Mg₂C₃ + 4H₂O → 2Mg(OH)₂ + C₃H₄ SiC + H₂O → SiO₂ + CH₄

¹⁻Butyne has sp hybridisation and more electronegative than double bonded carbon (sp²) in¹⁻butene, therefore,¹⁻butyne has more dipole moment than 1 butene.¹⁻Butyne has (50% s-character) has more s-character than¹⁻butene (33% s-character).

How many structures of X is possible?

on ozonolysis gives. The structure of product is shown below:

Which of the following alkenes will give same product by any method out of hydration, hydroboration-oxidation and oxymercuration-demercuration?

CH₃−CH₂−CH=CH₂ + HBr ROOR (peroxide) Major (X) + Minor (Y) X and Y respectively are

How many structures of X is possible?

When trans^{-2}-butene is reacted with Br₂, then product formed is

But^{-1}-ene \(\xrightarrow{(CH_3COO)_2Hg} H_2O\) ? The product in the above reaction is

Nitrobenzene (PhNO₂) \(\xrightarrow{Zn + NH_4Cl}\) P. P will be

Assertion : Phenol is more reactive than benzene towards electrophilic substitution reaction. Reason : In the case of phenol, the intermediate carbocation is more resonance stabilised.

Maximum decarboxylation occurs in

Assertion : Toluene in presence of UV rays forms benzaldehyde. Reason : Dichlorotoluene is formed as an intermediate.

The product P is

Assertion: Benzene on heating with conc. H₂SO₄ gives benzenesulphonic acid which when heated with superheated steam under pressure gives benzene.

What is D?

Assertion : Cis^{-2}-butene gives meso^{-2},³⁻butanediol with dilute alkaline KMnO₄ solution. Reason : Dilute alkaline KMnO₄ solution gives trans addition with alkenes.

The product obtained is/are

Which of the following species participate in sulphonation of benzene ring?

Assertion : Acetylene on reacting with sodamide gives sodium acetylide and ammonia. Reason : sp hybridised carbon atoms of acetylene are considerably electronegative.

Which of the following sequence of reactions (reagents) can be used for the conversion of C₆H₅CH₂CH₃ into C₆H₅CH = CH₂?

Isopropyl benzene on air oxidation in the presence of dilute acid gives

The major product obtained on the monobromination (with Br₂/FeBr₃) of the following compound A is

Nitrobenzene on treatment with zinc dust and aqueous ammonium chloride gives

Assertion : Addition of HBr on²⁻butene gives two isomeric products. Reason : Addition of HBr on²⁻butene follows Markovnikov's rule.

Assertion : p-O₂N – C₆H₅COCH₃ is prepared by Friedel Crafts acylation of nitrobenzene. Reason : Nitrobenzene easily undergoes electrophilic substitution reaction.

The compound having only primary hydrogen atoms is

The treatment of benzene with isobutene in the presence of sulphuric acid gives

Nitrobenzene gives N⁻phenylhydroxylamine by

Rate determining step in nitration of benzene is

Gasoline is a mixture of hydrocarbons containing

Identify the product in the reaction. C₆H₆ + HNO₃/H₂SO₄ → intermediate compound → Sn/HCl → product.

Assertion: Alkenes and cycloalkanes series of hydrocarbons have same general formula. Reason: Either insertion of a double bond or formation of a ring reduce the number of hydrogen atoms of corresponding alkane by 2