Chemistry Past Questions

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87 questions JAMB 2505 WAEC 1623 NECO 168 CUSTOM 10
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Past Questions

87 questions
Question 1 of 20 87 total questions
Question 21
jamb 2010

The compound that is used as an anesthetic is?

ACCl4
BCH Cl3
CCH2Cl2
DCH3Cl
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Question 22
jamb 2010

Two hydrocarbons X and Y were treated with bromine water. X decolorised the solution and Y did not not. Which class of compound does Y belong?

ABenzene
BAlkynes
CAlkenes
DAlkanes
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Question 23
jamb 2010

The haloalkanes used in dry-cleaning industries are?

Atrichloromethane and tetrachloromethane
Bchloroethene and dichloroethene
Ctrichloroethene and tetrachloroethene
Dchloroethane and dichloroethene
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Question 24
jamb 2010

One of the major uses of alkane is?

Aas domestic and industrial fuel
Bin the hydrogenation of oils
Cin the textile industries
Din the production of plastics
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Question 25
jamb 2010

The correct order of increasing boiling points of the following compounds C3H7OH, C7H16 and C4H10 is?

AC3H7OH → C4H10 → C7H10
BC4H10 → C7H16 → C3H7OH
CC7H16 → C3H7OH → C4H10
DC4H10 → C3H7OH → C7H16
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Question 26
jamb 2010

The final products of the reaction between methane and chlorine in the presence of ultraviolet light are hydrogen chloride and?

Atricloromethane
Bdichloromethane
Ctetrachloromethane
Dchloromethane
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Question 27
jamb 2010

Which of the following is used to hasten the ripening of fruit?

AEthene
BEthanol
CEthyne
DEthane
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Question 28
jamb 2010

Benzene reacts with hydrogen in the presence of nickel catalyst at 180ºC to give?

Axylene
Btoluene
Ccyclopentane
Dcyclohexane
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Question 29
jamb 2010

Which of the following organic compounds is very soluble in water?

ACH3COOH
BC2H2
CC2H4
DCH3COOC2H5
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Question 30
jamb 2010

Which of the following is used as fuel in miners' lamp?

AEthanal
BEthyne
CEthene
DEthane
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Question 31
jamb 2010

The IUPAC nomenclature of the compound above is?

A4 - ethyloctane
B5 - ethyloctane
C5 - propylheptane
D3 - propylheptane
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Question 32
jamb 2010

The residual solids from the fractional distillation of petroleum are used as?

Acoatings of pipes
Braw materials for the cracking process
Cfuel for the driving tractors
Dfuel for jet engines
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Question 33
jamb 2010

Stainless steel is used for making?

Amagnets
Btools
Ccoins and medals
Dmoving parts of clocks
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Question 34
jamb 2010

A compound gives an orange-red color to non-luminous flame. This compound is likely to contain?

ANa+
BCa2+
CFe3+
DFe2+
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Question 35
jamb 2010

When iron is exposed to moist air, it gradually rusts. This is due to the formation of?

Ahydrate iron (III) oxide
Banhydrous iron (III) oxide
Canhydrous iron (II) oxide
Dhydrate iron (II) oxide
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Question 36
jamb 2010

A constituent common to bronze and solder is?

Alead
Bsilver
Ccopper
Dtin
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Question 37
jamb 2010

Which of the following is used in rocket fuels?

AHNO3
BCH3COOH
CH2SO4
DHCl
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Question 38
jamb 2010

To a solution of an unknown compound, a little dilute tetraoxosulphate (VI) acid was added with some freshly prepared iron (II) tetraoxosulphate (VI) solution. The brown ring observed after the addition of a stream of concentrated tetraoxosulphate (VI) acid confirmed the presence of?

ACO\(^{2-}_{3}\)
BCl-
CSO\(_{3}^{2-}\)
DNO\(^{2-}_{3}\)
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Question 39
jamb 2010

2H2(g) + O2(g) ⇌ 2H2O(g) ΔH = -ve
what happens to the equilibrium constant of the reaction above if the temperature is increased?

Ait is unaffected
Bit becomes zero
Cit decrease
Dit increase
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Question 40
jamb 2010

The graph above demonstrate the effect of?

Asurface area on the rate of reaction
Bcatalyst on the rate of reaction
Cpressure on the rate reaction
Dconcentration on the rate of reaction
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