CHEMISTRY OF HYDROCARBONS

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CHEMISTRY OF HYDROCARBONS

1 / 71

When CH3 is attached with the benzene ring, it makes the ring:

2 / 71

Acetophenone can be formed by which of the following reaction of benzene?

3 / 71

Electrophile in sulphonation of benzene is

4 / 71

Which derivative of benzene shows maximum reactivity in electrophilic substitution reactions?

5 / 71

Which of the following reactions is used for the production of alcohols on industrial scale?

6 / 71

Which of the following molecule shows cis- trans isomers? 

7 / 71

Alkenes undergo:

8 / 71

Treatment of ethene with cold sulphuric acid followed by reaction with boiling water yields:

9 / 71

An olefin "X" on ozonolysis gives CH3CH2COCH3 and CH3COCH3. The IUPAC name of X is:

10 / 71

A gas decolorizes alkaline KMnO4 solution but does not give any PPT with ammonical AgNO3

11 / 71

Select meta directing group of the following?

12 / 71

Which of the following compound react slower than benzene in electrophilic substitution reaction

13 / 71

The correct order of the reactivity of hydrocarbon given below is

14 / 71

Which catalyst is used in oxidation of benzene ring?

15 / 71

Acetone can be obtained by ozonolysis 

16 / 71

Order of reactivity of halogen toward alkane is

17 / 71

Homolysis of a covalent bond yields a very reactive species with incomplete octet in its valence shell. What is this species?

18 / 71

Which of the options show all possible products of combustion of Butene? 

19 / 71

In Fricdal Craft's Chlorination of Benzene, Iron III chloride acts as a catalyst, which is the initial reaction in the generation of an electrophile?

20 / 71

Which one of the following acts as a electrophile in the electrophilic substitution of benzene with bromine

21 / 71

Which compound is obtained by the elimination of bromopropane? 

22 / 71

Reaction mechanism of alkanes with halogens is known as

23 / 71

Among the following, which one has electron withdrawing effect: 

24 / 71

Chlorination and Bromination mostly uses:

25 / 71

For halogenation of benzene, which reagent is used:

26 / 71

Which of the following species are 3,5(meta directing groups when second group is introduced into the benzene ring

I = -NH2    II = -CHO    III = -COOH   IV = -CH3 

27 / 71

The reaction of benzene with bromine in the presence of FcBr3 follows the mechanism of ___ reaction

28 / 71

Which one of the following is a powerful electrophile used to attack on the electrons of benzene ring?

29 / 71

Order of reactivity of alkenes with hydrogen halide is

30 / 71

Addition of unsymmetrical reagent to an unsymmetrical alkene is governed by:

31 / 71

Ethene on polymerization, give the product polyethene, this reaction may be called as 

32 / 71

Benzene in presence of AICI3 gives acetophenone when reacts with

33 / 71

The substitution of -II group by -NO2 group in benzene is called 

34 / 71

Hydrogenation of unsaturated oils is done by using

35 / 71

Ethyne molecule is formed when two carbon atoms joined together to form a sig bond only: 

36 / 71

The introduction of NO2 group in the benzene ring is called nitration. The nitrate of benzene takes place when it is heated with a 1:1 mixture of ___ at 50-55°C 

37 / 71

When hydrogen atom is removed from benzene, group left is called: 

38 / 71

Most reactive compound among the following:

39 / 71

The oxidation of toluene by acidified KMnO4 produces 

40 / 71

Benzoic acid is the main product when ___ is oxidized by acidified K2Cr2O7

41 / 71

Benzoic acid is the only oxidation product along with formation H2O and CO2, of an organic compound A, when A is treated with neidified potassium dichrominte, A is

42 / 71

X is decolourized when alkyl benzene are readily oxidized to benzoic acid, X is

43 / 71

The conversion of benzene into cyclohexane is ____

44 / 71

Which of the following is produced by the action of CH3CI on benzene in presence of AICI3 followed by oxidation in the presence of acidified KMnO4 give

45 / 71

What is required other than anhydrous AlCl3 , when toluene is prepared by Friedal craft reaction?

46 / 71

How many a electrons are there in benzene to form delocalized electronic cloud?

47 / 71

The resonance energy of benzene is 

48 / 71

Total number of hybrid orbitals of all the carbon atoms in benzene are: 

49 / 71

Acetylene gives ___ precipitates with AgNO3 in ammonium hydroxide solution

50 / 71

Acetone is prepared by the hydration of 

51 / 71

Which of the following is most reactive to give electrophilic addition reactions 

52 / 71

Which of the following is not acidic in nature 

53 / 71

The only alkyne which gives an aldehyde upon addition of water

54 / 71

Baeyer's reagent is used in the laboratory for 

55 / 71

Which of the following is mono-ene 

56 / 71

In addition of HCl to CH3CH-CH2, which one will be added first: 

57 / 71

The test for unsaturation of organic compounds is carried out by treating alkenes with 1% dilute alkaline KMnO4 solution. The colour of KMnO4 is discharged with the formation of 

58 / 71

The preparation of vegetable ghee involves 

59 / 71

Hydroxylation of alkenes produce 

60 / 71

Which of the following test can be used for distinguishing an alkane and an alkene 

61 / 71

Which of the following will decolorize bromine water? 

62 / 71

What type of reaction occurs between ethene and hydrogen?

63 / 71

Which of the following is not used for the dehydration of alcohols? 

64 / 71

Dehydrohalogenation of RX occurs in the presence of

65 / 71

Elimination of a halogen atom together with a hydrogen atom from an alkyl halide produces:

66 / 71

Dehydration of alcohols with conc. H2SO4 at 180°C gives:

67 / 71

The ease of dehydration of alcohols to produce alkenes is of the order: 

68 / 71

Halogenation of alkane is believed to proceed through

69 / 71

The most probable products are ___ when Cl2 is supplied in very high to react with CH4:

70 / 71

Propagation of free radical mechanism takes place 

71 / 71

The extent of halogenation of alkanes depends upon the factors:

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