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Chemistry (2016) QUIZ STUDY
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1.
In an electrochemical cell, polarization is caused by
.
A. Oxygen
B. Hydrogen
C. Tetraoxosulphate(IV) acid
D. Chlorine

2.
The condition required for corrosion to take place is the presence of
.
A. Oxygen and Carbon (IV) oxide
B. Water and Oxygen
C. Water and Carbon (IV) oxide and Oxygen
D. Water and Carbon (IV) oxide

3.
The enzyme used in the hydrolysis of starch to dextrin and maltose is
.
A. Zymase
B. Sucrase
C. Amylase
D. Lactase

4.
In the laboratory preparation of chlorine from concentrated hydrochloric acid in the presence of potassuim tetraoxomanganate(VII) the produced is dried by passing it through
.
A. Concentrated tetraoxosulphate (VI) acid
B. Anhydrous calcium chloride
C. Calcium oxide
D. Sodium hydroxide

5.
The monomer of nylon is
.
A. Hydroxybenzene
B. Hexanedioic acid
C. Benzene -1,-4-dicarboxylic acid
D. Ethane-1,2-diol

6.
The principle of column chromatography is based on th ability of the constituents to
.
A. React with the solvent in the column
B. React with each other in the solvent in the column
C. Dissolve in each other in the column
D. Move at different speeds in the column

7.
Ammonium chloride can be separated from its mixture with common salt by
.
A. Distillation
B. Evaporation
C. Decantation
D. Sublimation

8.
The ability of carbon to form long chains is referred to as
.
A. Alkylation
B. Acylation
C. Carbonation
D. Catenation

9.
The industrial preparation of hydrogen gas from water gas is referred to as
.
A. Bosch process
B. Contact process
C. Haber process
D. Bayer Process

10.
The relative atomic mass of a naturally occurring lithium consisting of 90%\(\frac{7}{3}\)Li and 10%\(\frac{6}{3}\)Li is
.
A. 6.2
B. 6.8
C. 7.1
D. 6.9
Explanation.
(\(\frac{90}{100}\) x 7) + (\(\frac{10}{100}\) x 6)

= 6.3 + 0.6 = 6.9

11.
The colour of litmus in an alkaline medium is
.
A. Red
B. Yellow
C. Pink
D. Blue

12.
The compounds CH3CH2CHO and CH3COCH3 can be distinguished from each other using
.
A. Dilute ammonia
B. Benedict's solution
C. Tollen's reagent
D. Sodium hydroxide solution

13.
Which of the following statements is true about 2-methylpropane and butane
.
A. They have different number of carbon atoms
B. They are members of same homologous series
C. They have the same boiling points
D. They have the same chemical properties

14.
The process that requires the use of hardwater in its operation is
.
A. Tanning
B. Bottling
C. Laundry
D. Dyeing

15.
What is the concentration of a solution containing 2g of NaOH in 100cm3 of solution?
[Na=23, O=16, H=1]
.
A. 0.05 moldm-3
B. 0.30 moldm-3
C. 0.50 moldm-3
D. 0.40 moldm-3
Explanation.
2g NaOH is contained in 100cm3
Xg NaOH is contained in 1000cm3

Xgram = \(\frac{2\times 1000}{100}\) = 20g

Mole = \(\frac{20}{40}\) = 0.50mol/dm3

16.
The radioisotope used in industrial radiography for the rapid checking of faults in welds and casting is
.
A. Phosphorus-32
B. Cobalt-60
C. Carbon-14
D. Iodine-131

17.
The compound produced when sodium peroxide is heated with excess sodium is
.
A. Na2CO3
B. Na2O
C. NaNO2
D. NaOH

18.
The pollutant that contributes to the depletion of the ozone layer is
.
A. CFCs
B. NO2
C. SO2
D. CO

19.
Which of the following properties is not peculiar to matter?
.
A. Kinetic energy of particles increases from solid to gas
B. Random motion of particles increases from gas to solid
C. Orderliness of particles increases from gas to liquid
D. Random motion of particles increases from liquid to gas

20.
Cast iron is used in making
.
A. Chains and agricultural implements
B. Iron sheets and retort stand
C. Nails and iron rods
D. Stoves and cookers

21.
Which of the following compounds is used as a gaseous fuel?
.
A. CH3 -CH2 -CHO2 -COOH
B. CH3 -C = CH
C. CH3 -CH2 -CH2 -CH3
D. CH2 -CH2 -CH3

22.
The product formed when propanol is heated over a copper catalyst in the absence of oxygen are
.
A. CH3CH2CHO and H2
B. CH3CHO and CO2
C. CH3CH2COOH and H2
D. CH3COOH and CO2

23.
Alkanols have the general molecular formula
.
A. C1H2n-2
B. C1H2n-1CHO
C. C1H2n-2OH
D. C2H2n+1OH

24.
Which of the following is not an alkali?
.
A. Ca(OH)2
B. NH3
C. NaOH
D. Al(OH)3
Explanation.
Both NH3 and Al(OH)3 are not alkali

25.
Which of the following statements is correct about the periodic table?
.
A. Elements in the same group have the same number of electron shells
B. The non-metallic properties of the elements tend to decrease across each period
C. Elements in the same period have the same number of valence electrons
D. The valence electrons of the elements increase progressively across the period

26.
The metal whose ore can be concentrated by passing it through a magnetic separator is
.
A. Zn
B. Sn
C. Cn
D. Ca

27.
An example of an acidic oxide is
.
A. NO
B. CO
C. SO2
D. CuO

28.
What volume of 0.5 MH2SO4 will exactly neutralize 20cm3 of 0.1 MNaOH Solution?
.
A. 2.0cm 3
B. 5.0cm 3
C. 6.8cm 3
D. 8.3cm 3

29.
Diamond cannot be used
.
A. In making bicycle chains
B. As abrasives
C. In cutting glass and metals
D. As dies for drawing wires

30.
Ethanol is soluble in water due to the presence of a
.
A. Carbonyl group
B. Hydroxyl groupd
C. Phenyl group
D. Methyl group

31.
The number of electronic shells contained in an atom with electron configuration 1s22s22p63s23p64s2 is
.
A. 3
B. 2
C. 4
D. 5

32.
The drying agent suitable for drying ammonia is
.
A. Calcium Chloride
B. Calcium Oxide
C. Phosphorus(V) Oxide
D. Concentrated H2SO4

33.
The arrangement of particles in crystal lattices can be studied using
.
A. X-rays
B. \(\beta\)-rays
C. \(\alpha\)-rays
D. \(\gamma\)-rays

34.
In the extraction of iron, the waste gas from the furnace is a mixture of
.
A. PH3 CO and CO2
B. CO and C
C. N2 CO and CO2
D. PH3 and CO

35.
In a neutralization reaction involving HCI and NaOH using litmus as indicator, the colour at the end point is
.
A. Blue
B. Red
C. Orange
D. Purple

36.
An example of a solid emulsion is
.
A. Butter
B. Hair cream
C. Milk
D. Cod-liver oil

37.
An isotope has an atomic number of 15 and a mass number of 31. The number of proton it contains is
.
A. 16
B. 15
C. 31
D. 46

38.
Calculate the volume in cm3 of oxygen evolved at s.t.p when a current of 5A is passed through acidified water for 193s?
[F = 96500 C mol1. Molar volume of a gas at s.t.p = 22.4dm3]
.
A. 0.056dm3
B. 0.224dm3
C. 224.000dm3
D. 56.000dm3
Explanation.
Q = 193 x 5 = 965C
40H \(\mapsto\) 2H2O + O2 + 4e
4 x 96500C = 22.4dm3
965C = x

x = \(\frac{22.4 \times 965}{4 \times 96500}\)
= 0.056dm3

39.
The gas that is used for the treatment of cancer is
.
A. Neon
B. Radon
C. Xenon
D. Argon

40.
A chemical reaction in which the hydration energy is greater than the lattice energy is referred to as
.
A. A reversible reaction
B. A spontenous reaction
C. An endothermic reaction
D. An exothermic reaction

41.
MnO4(aq) + Y 5Fe2+ (aq) \(\mapsto\) Mn2+ (aq) + 5Fe 2+ (aq) + 4H2O(1)

In the equation above, Y is
.
A. 10H+ (aq)
B. 5H+ (aq)
C. 8H+ (aq)
D. 4H+ (aq)

42. q-image

The compound above exhibits

.
A.

Geometric isomerism

B.

Positional isomerism

C.

Structural isomerism

D.

Optical isomerism


43.
n monosaccharide \( \underset{Q}{\stackrel{P}{\rightleftharpoons}} \) polysaccharide -n water.

In the process above, P and Q respectively represent
.
A. Condensation and hydrolysis
B. Fermentation and condensation
C. Polymerization and hydrolysis
D. Polymerization and condensation

44. q-image

The functional groups present in the compound above are

.
A.

Alkene and halo-group

B.

Hydroxyl and chloro-group

C.

Alkene and chloro-group

D.

Hydroxyl and halo-group


45. q-image

In the diagram above, X is the

.
A.

Enthalphy

B.

Activated complex

C.

Activation energy

D.

Enthalphy change


46. q-image

The diagram represents

.
A.

A spontaneous reaction

B.

An exothermic reaction

C.

A non-spontaneous

D.

An endothermic reaction


47. q-image

The curve depicts titration between

.
A.

Strong acid and strong base

B.

Strong acid and weak base

C.

Weak acid and weak base

D.

Weak acid and strong base


48. q-image

From the diagram above, an ideal gas can be represented by

.
A.

K

B.

M

C.

L

D.

N


49.
CH4(g) + CI2(g) \(\to\) CH2CI(s) + HCIg

The major factor that influences the rate of the reaction above is
.
A. Concentration
B. Catalyst
C. Temperature
D. Light

50.
N2O4(aq) \(\rightleftharpoons\) 2NO2(g) \(\bigtriangleup\)H = +ve

In the reaction above, an increase in temperature will
.
A. Increase the reactant production
B. Increase the value of the equilibrium constant
C. Shift the equilibrium to the left
D. Decrease the value of the equilibrium constant

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