AIIMS Chemistry Hydrocarbons Class 11 Questions

Correct order for reaction with alcoholic KOH

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

Which of the following is a formula of methanides: $$\text{(a) }\text{Be}_2\text{C} \qquad \text{(b) }\text{CaC}_2 \qquad \text{(c) }\text{Mg}_2\text{C}_3 \qquad \text{(d) }\text{Al}_4\text{C}_3$$

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?

Toluene is nitrated and the resulting product is reduced with tin and hydrochloric acid. The product so obtained is diazotised and then heated with cuprous bromide. The reaction mixture so formed contains

The function of AlCl₃ in Friedel-Craft's reaction is to

Assertion: Anilinium chloride is more acidic than ammonium chloride. Reason: Anilinium chloride is resonance stabilised.

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