Chapter # 8 Aliphatic Hydrocarbons MCQs
1. Valencies in alkanes are _____________
a.
Completely satisfied
b.
Partially satisfied
c.
No satisfied
d.
No general rules
2. Alkanes containing one branch on main
chain are called_________
a)
Iso b)
Normal
c)
Neo d)
Branched
3. When one hydrogen atom of alkane is replaced/removed, then it is
called
_________
a.
Alkene
b.
Alkyl
c.
Aldehyde
d.
Saturated hydrocarbon
4. Alkanes are also known as _______
a.
Saturated hydrocarbon
b.
Unsaturated hydrocarbon
c.
Paraffins
d.
a & c
5. Sabatier’s Sendren’s reaction involves
_________in presence of Ni
a)
alkene & H2 b)
alkene & O2
c)
alkene & N2 d)
alkene & Cl2
6.
Zn is a good___________
a)
Metal b)
Oxidizing agent
c)
Non-metal d) Reducing agent
7.
Removal of -COOH is
called______
a)
Carboxylation b) Decarboxylation
c)
Esterification d) Hydroxylation
8.
Soda lime is a mixture
of_____________
a.
CaO and KOH
b.
CaO and NaOH
c.
NaOH and NaO
d.
Nao and KOH
9.
Malozonide changes
into___________
a)
Epoxide b)
CO2 + H2O
c)
Ozonide d)
CO+H2O
10.
RCOONa+H2O
[Electrolysis] is known as _____
a) Bosch reaction b) Kolb
reaction
c)
Sabatier’s reactiuon d) Frankland reaction
11.
R-Mg-Br is called_________
a.
Grignard reagent
b.
Wurtz reaction
c.
Tollen’s reagent
d.
Pinacol pinacolour reagent
12.
Upto _____ C atoms, alkanes
are gases
a)
2 b)
3
c)
4 d)
6
13.
Alkanes are less reactive
than alkenes due to__________
a.
Presence of sigma bond
b.
Absence of pi bonds
c.
Presence of sigma and pi
bonds
d.
No justification available
14.
Introduction of nitro group
is called______
a)
Nitration b) Halogenation
c)
Sulphonation d) None
15.
Order of halogenation
is___________
a)
I>Cl>Br>F b)
F>Cl>I>Br
c)
F>Cl>Br>I d)
Cl>F>Br>I
16.
Gas is used in fertilizer
____________
a)
C2H6 b) C2H4
c)
C2H2 d)
CH4
17.
General formula of alkenes
is _______
a)
CnH2n+2 b) CnH2n-2
c)
CnH2n d) CnH2n-x
18.
The order of dehydration of
alcohol is____
a.
sec>pri>ter
b.
pri>sec>ter
c.
ter>sec>pri
d.
no specificity occurs
19.
Removal of halogen and
hydrogen atom is___
a.
Halogenation
b.
Dehalogenation
c.
Dehydrohalogenation
d.
Carbonations
20.
Alkenes are produced from
Dehalogenation of_______
a) di-halides alkane b)
tri-halides alkane
c)
vic. Di-halide d) vic. Trihalides
21.
Reactivity due to pi-
electrons is present in
____________
a)
Alkane b)
Alkene
c)
Alkyne d)
b and c
22.
π- electrons
favour____________
a.
Less reactivity
b.
Addition reactions
c.
Substitution reactions
d.
None
23.
Raney nickel is____________
a.
An alloy of Ni-Cu
b.
Alloy of Ni-Fe
c.
Alloy of Ni-Al
d.
Alloy of Ni-Mg
24.
Which member of IV A has
little tendency to form anions or cations?
a) Pb b)
Sn
c) Ge
d)
C
25.
Alkanes due to little
chemical reactivity are also called
a) Olefins b)
Paraffins
c)
Grignard’s reagent d) None of these
26.
Methane and other members
of paraffins do not react with aqueous solution of acids, alkalies, KMnO4
or other oxidizing agents this lack of reactivity is due to its nature
a) Polar b) Nonpolar
c)
Acidic d)
Basic
27.
Which hybrid orbital will
form the compound CH3 – CH = CH – CH2 – CH3
a) SP2 and SP b) SP2 and SP3
c) SP
d)
SP3
28.
Which of the following
types of reactions occur when a reactant has a double bond?
a) Substitution b) Addition
c)
Photolysis d)
Polymerization
29.
Among the following orbital
bonds, the angle is minimum between
a) SP3 bond b)
Px and Py orbitals
c) H
– O – H in water d) SP bond
30.
The compound with highest
boiling point is
a) n – hexane
b) n – pentane
c) 2 – methyl butane
d) 2, 2 – dimethyl propane
31.
Alcoholic KOH solution is
used for
a) Dehydrogenation
b) Dehalogenation
c) Dehydrohalogenation
d) Dehydration
32.
Which is least soluble in
water?
a) Phenol b)
Benzene
c)
Benzoic acid d) Ethanol
33.
Baeyer’s test is use to
detect the bond in an organic compound
a) Single bond b) Double bond
c)
Triple bond d) All of these
34.
Ethylene reacts with
Baeyer’s reagent to form
a) CO2 and H2O b)
Ethyl alcohol
c)
Ethylene oxide d) Ethylene glycol
35.
When ethylene reacts with
chlorine to form an oily product. This oily product is called
a) Baeyer’s test b) Bromine water
c)
Dutch – liquid d) Glycol
36.
Which of them is used as
general anesthetic?
a) Ethane b)
Ethene
c)
Ethyne d)
Ether
37.
The positive part of the
adding molecule will go to that carbon which has greater number of hydrogen
atoms. This statement is called
a) Hoffmann’s Rule
b) Baeyer’s Strain theory
c) Thiele’s theory
d) Markownikoff’s rule
38.
Bromo Ethane on treatment
with alcoholic KOH yields
a) Propane b) Ethene
c)
Ethylene d)
Acetylene
39.
Metallic carbide on
treatment with water gives out a colourless gas which burns readily in air and
gives a red precipitate with Cu2Cl2 + NH4OH.
The gas is
a) CH4 b)
C2H6
c) C2H4 d)
C2H2
40.
When acetylene reacts with
10% H2SO4 in the presence of HgSO4 yields
a) CH3OH b)
CH3COOH
c)
CH3CHO d)
CH3OCH3
41.
Dehydration of Ethanol
gives
a) C2H4 b) C2H2
c) C2H6 d)
C2H4O
42.
Which of the following has
active hydrogen?
a) C2H2 b)
C2H4
c) C2H6 d)
CH4
43.
Treatment of propene with
cold concentrated H2SO4 followed by boiling water
forms
a) Propyne b)
Propanol
c)
Propanal d)
2 – Propanol
44.
Markownikoff’s rule
provides guidance for addition of HBr in
a) CH2 = CH – CH3
b) CH2 = CH2
c) CH3 – CH = CH – CH3
d) None of these
45.
The compound having both SP
and SP3 hybridized carbon atom is
a) Propene b)
Propane
c)
Propyne d)
All of these
46.
PVC is a polymer of
a) CH2 = CH2 b)
C2H6
c)
CH2 = CH Cl d) C2H2
47.
The structural formula of
the compound which yields ethylene upon reaction with Zinc is
a) CH2Br – CH2Br b) C2H3Br
c) C2H2 d) C2H5OH
48.
The major reactions occur
in alkanes are
a) Electrophilic addition reaction
b) Nucleophilic substitution reaction
c) Free radical substitution reaction
d) Free radical addition reaction
49.
Consider a reaction
CH3
– CH = CH2 + H – X → product
The
reaction occurs by obeying
a) Wurtz’s rule
b) Frankland’s rule
c) Markownikoff’s rule
d) Kekule’s rule
50.
Acetylene is used as a
starting material for the preparation of Plastics, Synthetic rubber and
Synthetic fibre called
a) Orlon b)
Narlon
c)
Corlon d)
Forlon
51.
The high polymer of
chloroprene is
a) Polythene b)
Benzene
c)
Neoprene d)
Vinyl acetylene
52.
Which one of the following
gives Ethyne on electrolysis?
a) Sodium Acetate b) Sodium
Succinate
c)
Sodium Formate d) Sodium Fumerate
53.
Ethene on interaction with
hypochlorous acid gives
a) Dichloro acetaldehyde
b) Dichlorohydrin
c) Ethylene chlorohydrin
d) Ethylene Dichlorohydrin
54.
The compounds having Pi
bonds are in general
a) More reactive b) Less
reactive
c)
Neutral d)
Both a & b
55.
Which one will not
decolourize bromine water?
a) Ethene b)
Ethyne
c)
Propene d)
Butane
56.
Acetylene adds on to HCN to
give
a) Acetylene cyanide
b) Cyanoacetylene
c) Vinyl ethane
d) Acrylonitrile
57.
Action of HOCl with ethene
to give ethylene chlorohydrin is an example of
a) Displacement reaction
b) Substitution reaction
c) Addition reaction
d) Polymerization reaction
58.
Chloroform is stored in
dark coloured bottles because in light it is
a) Reduced to CCl4
b) Oxidized to CCl4
c) Reduced to phosgene
d) Oxidized to a poisonous phosgene
59.
Formation of alkane by the
action of zinc on alkyl halide is called ________
a) Frankland reaction
b) Wurtz reaction
c) Cannizzaro’s reaction
d) Kobe’s reaction
60.
The alkynes have _______
a) Tetrahedral frame work
b) Planar molecules
c) Linear structure
d) None of these
61.
The alkenes have _______
a) Tetrahedral frame work
b) Planar molecule
c) Linear structure
d) None of these
62.
Alkenes undergo _______
a) Addition reaction
b) Substitution reaction
c) Both addition & substitution reaction
d) None of these
63.
_______ does not react with
aqueous solution of acids, alkalies, or potassium
permanganate or other oxidizing agents and most of the usual laboratory
reagents.
a) Benzene b)
Ether
c)
Methane d)
Acetic acid
64.
The IUPAC name for the
following compound
is
CH3
CH2CH2CH3
│ │
CH3 –
CH – CH
– CH – CH = CH2
│
CH3
a) 4, 5 – dimethyl – 3 – propyl – 2 – hexene
b) 4, 5 – dimethyl – 3 – propyl – 1 – hexene
c) 3– propyl – 3 – dimethylpropyl – 1 – hexane
d) 2, 3 – dimethyl – 4 – propyl – 5 – hexane
65.
Markovnikov addition of KCl
to propene
involves,
a) Initial attack by a chloride ion
b) Isomerization of 1 – chloropropane
c) Formation of n – propyl cation
d) Formation of isopropyl cation
66.
When an aqueous solution of
sodium or potassium salt of mono carboxylic acid is subjected
to electrolytic, corresponding alkane
is
formed. This reaction is called ________
a)
Sabatier Senderens
Reaction
b)
Kolbe’s Electrolysis
c)
Polymerization
d)
Chlroination
67.
The elimination of hydrogen
halide (HX) from adjacent carbon atoms is called ________
a)
Pyrolysis b) Chlorination
c)
Dehydrohalogenation d) None
68.
When a mixture of ethane
and air is passed over heated silver under pressure, we
get
_____
a)
Epoxide b)
Super oxide
c)
Suboxide d)
None
69.
The process used for the
preparation of acetylene is _______
a)
Berthelot Process
b) Sabatier – Senderns Reaction
c)
Kolbe’s Process
d)
Haber’s process
70.
A simple chemical test to
distinguish 1, 3- butadiene and 1-
butyne is
a)
Br2│CCl4 b)
Ag(NH3)2OH
c)
KMnO4 d)
None
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