ECAT Pre Engineering Chemistry Chapter 19 MCQ Test With Answer

A six membered ring containing one double bond called

• Cyclohexene A
• Cyclohexane B
• Cyclohexadiene C
• None 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

Aromatic hydrocarbons are the derivatives of

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

An organic compound, on treatment with Br2 in CC14 gives bromoderivative of an alkene. The compound will be

• CH3 - CH = Ch2 A
• CH3CH = CHCH3 B
• HC = CH C
• H2C = CH2 D

Alkenes combine readily with electrophillic reagents such as halogens giving

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

Which one of the following is (m-xylene)

• 1,2 dimethyl benzene A
• 1,3 dimethyl benzene B
• 1,5 dimethyl benzene C
• 1,4 dimethyl benzene D

Alkanes have functional group :

• ----X A
• --OH B
• ----COH C
• No functional group D

Synthetic rubber is made by polymerization of

• Chloroform A
• Acetylene B
• Divinlacetylene C
• Butene D

Hydrocarbon which is liquid at room temperature is

• Pentane A
• Butane B
• Propane C
• Ethane 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 correct order of reactivity of halogens with alkanes is

• l₂> Br₂> Cl₂> F₂ A
• l₂> Cl₂> F₂> Br₂ B
• F₂> Cl₂> l₂> Br₂ C
• F₂> Cl₂> Br₂> l₂ D

The hydrocarbons having double bonds normally end with suffix

• Ane A
• Ene B
• Yne C
• Oic D

Alkanes are generally not reactive towards acids, alkalis, oxidation or reuducing agents. They however undergo some reactions, which one is the reaction undergone by alkanes

• Elemination A
• Addition B
• Free radical substitution C
• Nucleophilic substation D

Which one gives acidic reactions?

• CH₃----C≡C-------CH₃ A
• CH₃-----CH₂-----HC=CH----CH₂ B
• CH₃----CH=CH₂ C
• CH₃-----C≡CH D

Which of the following is an ortho-para directing group

• 
  A
• 
  B
• 
  C
• 
  D

Preparation of vegetable ghee involves:

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

Free radical mechanism of halogenation of alkanes follow step:

• Initiation A
• Propagation B
• Termination C
• All of these D

Cyclohexane can be converted not benzene in the presence of

• Pt at 100°C A
• Pt at 250°C B
• Pd at room temperature C
• Pt at room temperature D

The difference between amount of heat actually released and that of calculated is called

• Bonding energy A
• Activation energy B
• Resonance energy C
• Transition energy D

To differentiate isomers we use

• n- A
• iso- B
• neo C
• All of them D

Alkenes normally have ______ geometry

• Tetrachedral A
• Linear B
• Planer C
• None D

Which one does not declourized KMnO₄

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

Eletronegativity difference in C-C bond in alkanes is:

• Zero A
• Double B
• Half C
• 4.0 D

Nitroalkane are used in

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

Which one of the following gases is used for artificial ripening of fruits ?

• Ethane A
• Ethyne B
• Methane C
• Propane D

Mustard gas is a :

• Gas A
• Liquid B
• Solid C
• High boiling point D

The Total coal resources of Pakistan are estimated to be

• 184 billion A
• 184 million tones B
• 1.84 billion tounes C
• 1.84 million tonnes D

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

Benzene reacts with ozone and gives

• Glycerin A
• Glyoxal B
• Maleic anhydride C
• Benzoic acid D

Mustard gas is a

• Gas A
• High boiling speed B
• High melting liquid C
• Steam D