ECAT Pre Engineering Chemistry Chapter 19 MCQ Test With Answer

MCQ's Test For ECAT Chemistry Chapter 19 Aliphatic Hydrocarbons

Try The MCQ's Test For ECAT Chemistry Chapter 19 Aliphatic Hydrocarbons

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ECAT Chemistry Chapter 19 Aliphatic Hydrocarbons

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Question # 1

How many isomeric disubtituted products are obtained by the introducing of second group in the ring

Question # 2

When alkyl is treated with chlorine in the presence of sunlight

Question # 3

Hydrocarbon which is liquid at room temperature is

Question # 4

Which of the following is not an electrophitic substitution reaction of benzene

Question # 5

The method used only for the production of symmetrical alkanes

Question # 6

The addition of unsymmetrical reagent to unsymmetrical alkene is in accordance with the rule:

Question # 7

Kolb's method is not useful for the production of

Question # 8

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

Question # 9

The order of reactivity of halogen acids towards alkenes

Question # 10

The compound prepared by a substitution reaction of benzene is

Question # 11

Substitution of halogen in the benzene ring requires catalyst

Question # 12

Which is the used as test for the presence of alkenes

Question # 13

During the preparation of alkanes the hydrogenation of alkenes or alkynes the catalyst may be

Question # 14

Alkyl benzenes are readily oxidized by axidfied

Question # 15

Benzene does not undergo polymerization and it is also resistant to

Question # 16

The carbon, carbon bond length in benzene is

Question # 17

Alkanes are soluble in all except

Question # 18

Alkynes are colourless & odouless except

Question # 19

During nitration of benzene, the active nitrating agent is

Question # 20

Which of the following decolorized Br2-water

Question # 21

Which gas is used for welding purposes

Question # 22

How many molecules of chlorine adds in benzene in the presence of sunlight

Question # 23

For preparing an alkane, a concentrated aqueous solution of sodium or potassium salt of saturated carboxylic acid is subjected to

Question # 24

All are ortho & Para directing except

Question # 25

In Friedal-Craft's alkylation besides AlCl3 the other reactants are

Question # 26

Hybridization in alkanes is:

Question # 27

When benzene is burnt in free supply of air, it is completely oxidized to

Question # 28

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

Question # 29

The hydrocarbons having double bonds normally end with suffix

Question # 30

Polymerization of ethane take place at pressure of 100 atm and a temperature of

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ECAT Chemistry Chapter 19 Important MCQ's

Sr.# Question Answer
1 Substitution of halogen in the benzene ring requires catalyst
A. AlCl3
B. FeCl3
C. SiO2
D. Organo - nickel
2 The sp2hybird orbitals are oriented in space at one angle
A. 180°
B. 109.5°
C. 100°
D. 120°
3 Incomplete oxidation of alkanes yields
A. CO2& carbon black
B. CO2+ heat
C. CO and carbon black
D. CO + heat
4 Which of the following is an ortho-para directing group
5 The term aromatic was derives from
A. Greek word
B. Latin
C. Russian
D. English
6 Which one does not declourized KMnO4
A. Alkenes
B. Alkynes
C. Bezene
D. All above
7 The elimination of HX from adjacent carbon atoms is called
A. Halogenations
B. Hydrohalogenation
C. Dehydrohalogenation
D. Hydration
8 Hybridization in alkanes is:
A. sp
B. sp2
C. sp3
D. dsp2
9 Complete combustion of alkane yields
A. CO2+ H2O
B. CO2+ heat
C. CO + H2O heat
D. CO2+ H2O + heat
10 Alkanes are gases :
A. C1-C4
B. C5-C10
C. C11-C15
D. C10-C20

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