ECAT Pre Engineering Chemistry Chapter 19 MCQ Test With Answer

Alkenes combine readily with electrophillic reagents such as halogens giving

• Haloalkanes A
• Gem-dihalides B
• Vicinal dihalides C
• Vinyl halides D

Complete combustion of alkane yields

• CO₂+ H₂O A
• CO₂+ heat B
• CO + H₂O heat C
• CO₂+ H₂O + heat D

Ethylene combines with water in the presence of H₂SO₄+ HgSO₄and forms

• Ethyle chloride A
• Ethyle alcohol B
• Carboxylic acid C
• None of these D

When methane reacts with Cl₂in the presence of diffused light the products obtained are?

• Chloroform only A
• Carbon tetrachloride only B
• Chloromethane and dichloromethane C
• Mixture of a,b,c D

Nitroalkane are used in

• Fuel A
• Solvents B
• Organic synthesis C
• All of them D

Boiling point of n-butane is:

• -102°C A
• -75°C B
• -55°C C
• 55°C D

Which of the following is an ortho-para directing group

• 
  A
• 
  B
• 
  C
• 
  D

Alkyl halides when reduced with nascent hydrogen in the presence of Zn + HCI, are converted to

• Alkynes A
• Alkenes B
• Alkanes C
• Alcohol D

Which one does not declourized KMnO₄

• Alkenes A
• Alkynes B
• Bezene C
• All above D

Kolb's method of alkanes production, is actually

• Hydrolysis A
• Catalysis B
• Electrolysis C
• Hydrogenation D

Amongst the following the compound that can be most readily sulphonated is

• Toluene A
• Benzene B
• Nitrobenzene C
• Chlorobenzene D

Incomplete oxidation of alkanes yields

• CO₂& carbon black A
• CO₂+ heat B
• CO and carbon black C
• CO + heat D

Which of the following acid can be used as a catalyst in Friedal Craft's reactions

• AlCl₃ A
• HNO₃ B
• BeCl₂ C
• NaCl D

Preparation of vegetable ghee involves

• Halogenations A
• Hydrogenation B
• Hydroxylation C
• Dehydrogenation D

When sodium benzoate is treated with soda lime (NaOH) benzene is formed. What is the other product

• Na₂CO₃ A
• NaHCO₃ B
• Ca(OH)₂ C
• CaCO₃ D

Which of the following reaction is characteristic of benzene

• Electrophilic substitution reaction A
• Reduction B
• Oxidation C
• Ozonolysis D

Which gas is produced by treating CaC₂with water

• Methane A
• Ethane B
• Acetylene C
• HCI D

The compound prepared by a substitution reaction of benzene is

• Acetophenone A
• Glyoxal B
• Cyclohexame C
• Hexabromo cyclohexane D

Aromatic hydrocarbons are the derivatives of

• Normal series of paraffins A
• Alkene B
• Benzene C
• Cyclohexane D

The hydrocarbons having double bonds normally end with suffix

• Ane A
• Ene B
• Yne C
• Oic D

The method involved for electrolysis of Na or K salts of carboxylic acids

• Sabatier's sendrens reaction A
• Kolbe's method B
• Clemmensen C
• Wolf kishner reduction D

The saturated hydrocarbons usually end with suffix ______

• Ane A
• Ene B
• Yne C
• Oic D

Most common reactions of benzene and its derivatives are

• electrophilic addition reactions A
• electrophilic substitution reactions B
• Nucleophilic addition reactions C
• Nucleophilic subtitution reactions D

CnH_2nis the general formula of

• Alkanes A
• Alkanes B
• alkynes C
• None of above D

• 4-methyl pentene A
• 2-methyle-1-butene B
• 2-methyl propane C
• None of the above D

Hydrogenation of alkenes/alkynes inthe presence of Ni as catalyst at 3000°C result in the formation of corresponding alkanes. This reaction is known as

• Sabatier-senderens reaction A
• kolbes reaction B
• Cannizaro's reaction C
• Haloform reaction D

In which one of the following compound rings are not fused together at ortho positions

• Phenanthrene A
• Naphthalene B
• Diphenyemethane C
• Anthracene D

The four bonds of carbon in methane are directed towards the corners of

• Cube A
• Pentagon B
• Hexagon C
• Tetrahedron D

"Each different compound should have a different name" was published by IUPAC system of nomenclature in

• 1892 A
• 1830 B
• 1947 C
• 1979 D

A single benzene ring can have ______ ortho position maximally

• One A
• Two B
• Three C
• Four D