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

Paraffins are also called

Question # 2

The method used only for the production of symmetrical alkanes

Question # 3

To differentiate isomers we use

Question # 4

The treatment of benzene with isobutene in the presence of sulphuric acid give

Question # 5

Alkenes normally have ______ geometry

Question # 6

A salt producing hydrocarbon among these compounds is

Question # 7

Odour of alkene is:

Question # 8

Acetylene when treated with 10% H2SO4in the presence of HgSO4adds one molecule of water to form

Question # 9

The hydrocarbons having double bonds normally end with suffix

Question # 10

Synthesis rubber is made by polymerization :

Question # 11

De halogenatiion of tetrahalides happens in the presence of active metal like

Question # 12

Acetylene is used in the manufacture of

Question # 13

What is not a common use of methane

Question # 14

Eletronegativity difference in C-C bond in alkanes is:

Question # 15

Alkyl benzenes are readily oxidized by axidfied

Question # 16

The presence of a double bond in a compound is the sign of

Question # 17

Preparation of vegetable ghee involves

Question # 18

The three alternate single and double bonds in the benzene ring are called

Question # 19

The benzene molecule contains

Question # 20

C18and onward hydrocarbons are normally

Question # 21

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

Question # 22

Which of the following reaction is characteristic of benzene

Question # 23

Benzene does not undergo

Question # 24

The stability of acromatic compounds decreases with ------- in the no. of its resonance structure

Question # 25

Mustard gas is a

Question # 26

A six membered ring containing one double bond called

Question # 27

Formula of chloroform is

Question # 28

Replacement of hydrogen by NO2group is called

Question # 29

Benzene can be obtained by heating either benzoic acid with X or phenol with Y. X and Y are respectively

Question # 30

All are ortho & Para directing except

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Sr.# Question Answer
1 Which of the following decolorized Br2-water
A. Methane
B. Ethane
C. Ethene
D. Propane
2 Th IUPAC name of the compound having formula (CH3) 3 C - CH = CH2 is
A. 1, 1-Dimethyl-3-butene
B. 1,1,1-Trimethyl-3-propene
C. 3,3,-Dimenthyl-1-butene
D. 3,3,3,-Trimethyl-1-propene
3 Paraffins are also called
A. Alkanes
B. Alkynes
C. Alkenes
D. None of these
4 Meta directing group decreased the ----------- of benzene ring
A. Physical activity
B. Chemical reactivity
C. Density
D. None
5 Alkanes have functional group :
A. ----X
B. --OH
C. ----COH
D. No functional group
6 Acetylene gives
A. White ppt. with ammonical AgNO3 and red ppt. with ammonical Cu(NO3)2
B. White ppt. with ammonical AgNO3 and red ppt. with ammonical Cu2C12
C. White ppt. with both
D. Red ppt. with both
7 Benzene has a -------- structure
A. Pentagonal
B. Hexagonal
C. Heptagonal
D. Tetragonal
8 Benzene can be obtained by heating either benzoic acid with X or phenol with Y. X and Y are respectively
A. Zinc dust and soda lime
B. Soda time and zinc dust
C. Zinc dust and sodium hydroxide
D. Soda lime and copper
9 An alkane is produced when an alkyle halide reacts with zinc in the presence of
A. HCl
B. CH3COOH
C. Both a & b
D. None
10 Alkanes are least reactive towards:
A. Acids and bases
B. Reducing agents
C. Oxidizing agents
D. All of these
11 The geometry of acetylene is
A. Angular
B. Bent
C. Trigonal
D. Linear
12 Benzene does not undergo
A. Substitution reaction
B. Addition reaction
C. Oxidation reaction
D. Elimination reaction
13 Alkene general formula :
A. CnH2n+2
B. CnH2n
C. CnH2n-2
D. CnH2n+1
14 Which class of compound is more reactive
A. Alkane
B. Alkene
C. Alkyne
D. None
15 Which one of the following gases is used for artificial ripening of fruits ?
A. Ethane
B. Ethyne
C. Methane
D. Propane
16 Marsh gas was the name given to
A. Methane
B. Ethane
C. Propane
D. Butane
17 Alkyl benzenes are readily oxidized by axidfied
A. KMnO4
B. K2CO3
C. MnO4
D. H2SO4
18 Which of the following method is most appropriate for the manufacture of methane?
A. By reduction of CH2CL2
B. Wurtz reaction
C. Liquification of natural gas
D. None of these
19 Benzene was discovered by Michael Faraday's in
A. 1824
B. 1825
C. 1826
D. 1827
20 The saturated hydrocarbons usually end with suffix ______
A. Ane
B. Ene
C. Yne
D. Oic
21 Which one of the following is (m-xylene)
A. 1,2 dimethyl benzene
B. 1,3 dimethyl benzene
C. 1,5 dimethyl benzene
D. 1,4 dimethyl benzene
22 "Each different compound should have a different name" was published by IUPAC system of nomenclature in
A. 1892
B. 1830
C. 1947
D. 1979
23 During reaction of O2and alkenes, a product:
A. Glycol
B. Epxide
C. Halohydrin
D. Ethylene glycol
24 The electron releasing effect of methyl group is significant and it makes ring a good
A. Electrophilic
B. Nucleophilic
C. Nucleophobic
D. Hydrophobic
25 Benzene is obtained by fractional distillation of
A. Heavy oil
B. Anthracene oil
C. Middle oil
D. Light oil
26 Kolb's method is not useful for the production of
A. Methane
B. Ethane
C. Propane
D. Butane
27 The sp2hybird orbitals are oriented in space at one angle
A. 180°
B. 109.5°
C. 100°
D. 120°
28 Hydrocarbons are organic compounds which contain elements such as
A. Hydrogen
B. Carbon
C. Hydrogen and carbon
D. Halogens
29 C18and onward hydrocarbons are normally
A. Gases
B. Liquids
C. Solids
D. Plasma
30 The addition of unsymmetrical reagent to an unsymmetrical alkene is in accordance with the rule
A. Hund's rule
B. Markowvikov's rule
C. Pauli's exclusion principle
D. Auf ban principle

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