Question 1
The alkanes are called paraffins because
(a) They are unstable
(B) They have little affinity for reaction✅
(C)They combust easily
(D) They are used as fuel industrially
Question 2
Alkanes can be synthesized by any of these methods except
(a) Reaction of zinc-copper couple with ethanol and ethyl iodide
(b) Reaction of aluminum carbide and cold water
(C) Reaction of sodium alkanoate with soda lime
(D) Heating benzoic acid with calcium oxide✅
Question 3
Gobar gas is used as an industrial fuel,it’s constituents are
(a)Propane and pentane
(B) Phosphine and methane
(C) Methane and carbon dioxide✅
(D) Phosgene and butane
Question 4
In the pyrolysis of alkanes,which of these is not a suitable catalyst
(a) Manganese dioxide
(b) Alumina
(C)Silica
(D) Platinum✅
Question 5
In the alkane synthesis,quick lime is added to the caustic soda due to what reason
(a)Caustic soda is deliquescent
(B) Caustic soda attacks glass
(C) Both✅
(D) Neither
Question 6
The chlorination of methane occurs in the presence of ultraviolet light but it can be made to occur in the dark in the presence of…….. Catalyst
(a) Tetraethyl lead✅
(B) Carbon disulfide
(C) Ammonia
(D) Palladium
Question 7
The Halo alkane used to preserve biological specimens is
(a)Monochloro methane
(B)Dichloro methane
(C) Trichloromethane✅
(D)Tetrachloro methane
Question 8
The Halo alkane with an antiseptic odour is
(a)Iodoform✅
(B)Chloroform
(C)Fluoroform
(D)Bromoform
Question 9
The product of the combustion of alkanes are
(A)Soot and steam
(B) Carbon dioxide and steam✅
(C)Carbon dioxide and water
(D)Carbon monoxide and steam
Question 10
The vital force theory was proposed by
(a)Jons Berzelius✅
(B) Frederick wöhler
(C)Kolbe
(D) Berthelot
Question 11
A mixture of methane and oxygen is heated in the presence of…… Catalyst to yield methanal
(A)Alumina
(B) Molybdenum✅
(C) Chromium
(D) Carbon
Question 12
Methane is also called
(A)Biogas
(B)Carbogen
(C)Dephilogisted air
(D)Marsh gas✅
Question 13The gas used as domestic cookers (liquified petroleum gas)is a mixture of
(A)Propane and methane
(B) Propane and butane✅
(C)Propane and Ethane
(D)Hexane and eicosane
Question 14Bromoethane is used as….
(A) An additive to petrol as an anti knock agent✅
(B)A dessicator
(C)Cooling agent
(D)Solvent for grease,wax and fat
Question 15
Freons are used as……
(A) Refrigerant✅
(B) Organic disintegrators
(C) Extinguishers
(D)As an anti-eutrophication agent
Question 15
In the octane rating system for petrol
The compound with the highest rating is
(A)2,2,4-trimethylpentane✅
(B) n-heptane
(C)Octane
(D)Neopentane
Question 16
In diesel,the compound with the highest rating is
(A) Hexadecane✅
(B)Methyl naphthalene
(C)Iso octane
(D) Propyl decane
Question 17
The reaction of alkyl halides and magnesium in the presence of dry ether produces
(A)Tollen’s reagent
(B) Luca’s reagent
(C)Grignard’s reagent✅
(D) Huble’s reagent
Question 18
The process of reforming that involves the conversion of aliphatic to aromatic compounds is called
(A) Aromatization✅
(B) Isomerization
(C) Platforming
(D) Cracking
Question 19
The quality of petroleum products is increased by
(A) Reforming✅
(B) Cracking
(C) Pyrolysis
(D)Grading
Question 20
The anti knock agent added to petrol has what major disadvantage
(A) Lead is dispersed to the surrounding which causes lead poisoning and dyslexia✅
(B)The environs becomes sooty
(C)Lead paints are darkened due to production of hydrogen sulphide
(D)It causes acid rain
Question 21
Which of these is not a cracking type
(A)Thermal cracking
(B) Catalytic cracking
(C) Steam cracking
(D) Condensed cracking✅
Question 22
The petroleum fraction used in road surfacing is
(A)Ligroin
(B) Asphalt✅
(C) Petroleum ether
(D)Pyroligneous acid
