Question # 1

Which reaction produces a free radical

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SN reaction

Homelytic fission reaction

Heterolytic fission reaction

Addition reaction

The percentage of methane in natural gas is

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50%

60%

85%

90%

The open chain compounds are also called

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Aliphatic

Alicylic

Aromatic

Both a and b

Similarity in properties of different organic compounds give rise to the under standing of ______

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Polymerization

Non-polar nature

Homologous series

Isomerism

Which gasoline is better?

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Of low boiling point

Of low molecular mass

Of high octane

All of these

Sp³hybridization occurs when carbon is bound to

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Four other atoms

Three other atoms

Two other atoms

One other atoms

At present oil refineries in Pakistan are:

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One

Two

Three

Four

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0

1

2

3

The chemist who synthesized urea from ammonium cyanate was

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Berzelius

Kolbe

Wholer

Lavoisier

Types of cracking are:

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Thermal

Catalytic

Steam

All a, b ,c

The self linking of carbon atoms is called

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Chelation

Isomerism

Catenation

None of the above

The formula of ketone is

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None of these

Select from the following which one is alcohol?

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CH₃-CH₂-OH

CH₃-O-CH₃

CH₃COOH

CH₂-CH₂-BR

The functional group isomer of dimethylether is

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Ethyl alcohol

Propyl alcohol

Diethyl ether

Butyl alcohol

The gasoline having octane No. 100 has ______

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More knocking

Less knocking

No knocking

Only knocking

A double bond consists of

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Two sigma bonds

One sigma and one Pi bond

One sigma and two Pi bonds

Two Pi bonds

Which of the following is complex?

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CaSO₄. 0.5H₂O

(C₆H₁₀O₅)_n

C₆H₁₂O₆

CH₄

In which molecule carbon atom is sp²hybridized

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CH₄

C₂H₄

C₂H₂

None of the above

The bond angle between hydrogen atoms and carbon in alkane is

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104.5°

107.5°

109.5°

120.5°

The chemist who synthesized urea form ammonia cyanate was:

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Berzelius

Kolbe

Wohler

Lavoiser

Gasoline is a mixture of hydrocarbons containing carbon atoms

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5 to 10

5 to 8

5 to 12

5 to 11

n-butane and iso butane are an example of

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Chain isomerism

Positional isomerism

Meta merism

Functional group isomerism

Which is the chain isomer of n-pentane

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Isopentane

Neopentene

N-pentene

Isopentene

When a carbon atom forms single bonds with other carbon atoms, these hybrid orbitals overlap with the orbitals of hydrogen to form four bonds which are

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Three sigma and one P_i

Two sigma and two P_i

One sigma and three P_i

sigma

Wohler synthesized first of all the organic compound:

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Carbohydrates

Urea

Aniline

Toluene

Which of the following is a product of destructive distillation of coal

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Ammonia

Coke

Cyanides

Kerosene

The gasoline with high octane No. has ______

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More knocking

Less knocking

No knocking

Only knocking

Replacement of hydrogen atom by - SO₃H group in benzene is called

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Nitration

Alkylation

Sulphonation

Acylation

In the presence of high temperature and pressure peat is converted to:

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Lignite

Polymorphism

Polymerization

Catenation

The rotation of two carbon atoms joined by double bond would happened only if

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Pi bond is broken

Sigma bond is broken

Both bonds are broken

None of above

A nuclophile must

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Be an atom

A group of atoms

Have a lone pair

Be negatively charged

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ECAT Chemistry Chapter 18 Fundamental Principles of Organic Chemistry Online Test MCQs With Answers

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