More Classes
5th Class
6th Class
7th Class
8th Class
9th Class
10th Class
11th Class
12th Class
NAT I
NAT II
CSS
IQ
General Knowledge
MDCAT
ECAT
GAT General
GAT Subject
Other Links
Go to Home
Online Tests
ECAT Chemistry Chapter 19 Aliphatic Hydrocarbons Online Test MCQs With Answers
Question # 1
Which gas is used for welding purposes
Choose an answer
Butane
Nitrogen
Methane
Acetylene
Previous
Skip
Next
Question # 2
Odour of alkene is:
Choose an answer
Fruity
Odourless
Zarlic like
Irritating
Previous
Skip
Next
Question # 3
The temp. used for the hydrogenation of alkenes using Ni is
Choose an answer
2000°C
400°C
200-- 300°C
1000°C
Previous
Skip
Next
Question # 4
Synthetic rubber is made by polymerization of
Choose an answer
Chloroform
Acetylene
Divinlacetylene
Butene
Previous
Skip
Next
Question # 5
Physical properties of alkanes increase with increase of all physical constants except
Choose an answer
Boiling points
Melting points
Density
Solubility
Previous
Skip
Next
Question # 6
A fuel has the same knocking property as a mixture of 70 isooctane (2, 2, 4- trimethyl pentane) and 30% n-heptane by volume the octane number of the fuel is
Choose an answer
100
70
50
40
Previous
Skip
Next
Question # 7
Choose an answer
2-bromonitrobenzene
2-nitrobromobenzene
1-bromonitrobenzene
1-nitrobromobenzene
Previous
Skip
Next
Question # 8
When methane reacts with Cl
2
in the presence of diffused light the products obtained are?
Choose an answer
Chloroform only
Carbon tetrachloride only
Chloromethane and dichloromethane
Mixture of a,b,c
Previous
Skip
Next
Question # 9
The order of reactivity of halogens in aliphatic substitution reactions is
Choose an answer
Br2 > C12 > F2
C12 > Br2 > F2
C12 C12 > Br2
F2 > Br2 > C12
Previous
Skip
Next
Question # 10
The sp
2
hybird orbitals are oriented in space at one angle
Choose an answer
180°
109.5°
100°
120°
Previous
Skip
Next
Question # 11
Alkyl halides when reduced with nascent hydrogen in the presence of Zn + HCI, are converted to
Choose an answer
Alkynes
Alkenes
Alkanes
Alcohol
Previous
Skip
Next
Question # 12
When acetylene is passed through a copper tube at 300°C, it polymerizes to
Choose an answer
Polyacetylene
polyethylene
Benzene
None of these
Previous
Skip
Next
Question # 13
The method involved for electrolysis of Na or K salts of carboxylic acids
Choose an answer
Sabatier's sendrens reaction
Kolbe's method
Clemmensen
Wolf kishner reduction
Previous
Skip
Next
Question # 14
B-B'-dichloroethyl sulphide is commonly known as
Choose an answer
Mustard gas
Laughing gas
Phosgene gas
Bio gas
Previous
Skip
Next
Question # 15
Which class of compound is more reactive
Choose an answer
Alkane
Alkene
Alkyne
None
Previous
Skip
Next
Question # 16
Hydrocarbon which is liquid at room temperature is
Choose an answer
Pentane
Butane
Propane
Ethane
Previous
Skip
Next
Question # 17
Which of the following is not an ortho-para directing group
Choose an answer
Previous
Skip
Next
Question # 18
Which of the following reaction is characteristic of benzene
Choose an answer
Electrophilic substitution reaction
Reduction
Oxidation
Ozonolysis
Previous
Skip
Next
Question # 19
Benzene is not prepared from
Choose an answer
Acetylene
Phenol
Benzoic acid
Bromo benzene
Previous
Skip
Next
Question # 20
Benzene has a -------- structure
Choose an answer
Pentagonal
Hexagonal
Heptagonal
Tetragonal
Previous
Skip
Next
Question # 21
Which of the following is not aromatic hydrogencarbon
Choose an answer
Benzene
Naphthalene
Toluene
Cyclohexene
Previous
Skip
Next
Question # 22
The reaction in which ketone is reduced to the alkane is called
Choose an answer
Kolb
Clemmensen
Cannizzaro
None
Previous
Skip
Next
Question # 23
Alkenes combine readily with electrophillic reagents such as halogens giving
Choose an answer
Haloalkanes
Gem-dihalides
Vicinal dihalides
Vinyl halides
Previous
Skip
Next
Question # 24
Benzene is obtained by fractional distillation of
Choose an answer
Heavy oil
Anthracene oil
Middle oil
Light oil
Previous
Skip
Next
Question # 25
Preparation of ethylbenzene by the reaction of bromobenzene, ethylbromide and sodium is called
Choose an answer
Wurtz reaction
Fitting reaction
Wurtz fitting reaction
None of these
Previous
Skip
Next
Question # 26
When sodium benzoate is treated with soda lime (NaOH) benzene is formed. What is the other product
Choose an answer
Na
2
CO
3
NaHCO
3
Ca(OH)
2
CaCO
3
Previous
Skip
Next
Question # 27
The process in which orbitals of different energies and shapes mix with each other to give equivalent hybrid orbitals is called
Choose an answer
Isomerization
polymerization
Hybridization
Resonance
Previous
Skip
Next
Question # 28
When alkyl is treated with chlorine in the presence of sunlight
Choose an answer
1,3 dichloroproduct is formed
1,4 dichloro product is formed
1,3,5 trichloro product is formed
Only alkyl group is substituted
Previous
Skip
Next
Question # 29
Paraffins are also called
Choose an answer
Alkanes
Alkynes
Alkenes
None of these
Previous
Skip
Next
Question # 30
Hydrocarbons are divided into aliphatic, alicyclic and aromatic which structure among the following show an alicyclic hydrocarbon
Choose an answer
Previous
Skip
Next
Question # 31
For preparing an alkane, a concentrated aqueous solution of sodium or potassium salt of saturated carboxylic acid is subjected to
Choose an answer
Hydrolysis
Oxidation
Hydrogenation
Electrolysis
Previous
Skip
Next
Back