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Which of the following pairs of salts undergo hydrolysis?
AAlCI3 and NH4CI
BAICI3 and NaCI
CFeCI3 and KCI
DNa2SO4 and K2 SO4
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Question 502
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The method of collection of gases prepared in the laboratory depend on their
Aodour and atomicity
Bcolour and odour
Catomicity and density
Dsolubility and density
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Question 503
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Which of the following equipment is not used to detect radioactivity?
AWilson cloud chamber
BGeiger- muller counter
CMass spectrometer
DPhotographic plate
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Question 504
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A metal X forms two chlorides with the formulae XCI2 and XCI3. Where is X in the Periodic Table?
What type of bonding exists between X and chlorine in each of the chlorides?
Ametallic bonding
Bionic bonding
Ccovalent bonding
Ddative bonding
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Question 505
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A metal X forms two chlorides with the formulae XCI2 and XCI3. Where is X in the Periodic Table?
AGroup ll
BGroup llI
Cd-block
Ds-block
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Question 506
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One of the characteristics of transition metals is
Areducing ability
Bductility
Cability to conduct electricity
Dformation of coloured ions
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Question 507
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A nuclide emits a beta-particle (e) in the process, that atomic number
Aincreases by 1 while the mass numer remains constant
Bdecreases by 2 while the mass number remains constant
Cremains constant while the mass number decreases by 2
Dremains constant while the mass number increases by 1
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Question 508
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Which of the electrons in the following orbitals will experience the greatest nuclear attraction?
A1s electron of helium
B1s electron of potassium
C23 electron of boron
D2s electron of carbon
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Question 509
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Which of the following properties of elements deceases generally across a period in the Periodic Table?
AElectronegativy
BElectron affinity
CAtomic radluc
Dlonlzation energy
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Question 510
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Which of the following electron transition results in the emission of energy?
A3p to 3s
B3p to 4p
C2s to 2p
D1s to 2s
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Question 511
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The mass of an element is 27 and its atomic number is 13. What is the composition of the nucleus of its atom?
A13 electrons and 14 protons
B13 neutrons and 14 protons
C13 protons and 14 neutrons
D13 electrons and 14 neutrons
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Question 512
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Which of the following processes will pollute water?
AExposure of a body of water ultraviolet rays
BDischarge of industrial effluents effluents into water ways
CPassage of river water through a send bed
DAddition of a measured quantity of chlorine to water
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Question 513
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What are the two gases associated with the formation of acid rain?
ACO2 and HCI
BCO2 and N2
CCO2 and NO2
DHCI ans SO2
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Question 514
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When a sample of water was boiled, it lathered more readily with soap. it can be concluded that the sample most likely contained
Amagnesium tetraoxosulphate (VI)
Bsuspended solids
COrganic impurities
Dcalcium hydrogentrioxocarbonate (IV)
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Question 515
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What is the main impurity in haematite?
ACaSiO3
BCaCO3
CSiO3
DFe2O3
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Question 516
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Which of the following compound is used for removing impurities from bauxite?
ANaOH
BCaCO3
CNa3AIF6
DH2SO4
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Question 517
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What volume of 0.20 mol dm -3 NaOH solution would yield 5.0 g of NaOH on evaporation to dryness? [NaOH = 40g mol-1]
A400 cm3
B625 cm3
C1000 cm3
D1600 cm 3
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Question 518
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When excess ethene is shaken with acidified KMnO4 solution, the product obtained is
Aethane
Bethanal
Cethane - 1, 2 - diol
Dethanoic acid
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Question 519
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What process does the following equation represent ? n(C\(_{6}\)H\(_{10}\)O\(_{5}\)) + nH\(_{2}\)O → nC\(_{6}\)H\(_{12}\)O\(_{6}\) ?
APolymerization of glucose
BHydrolysis of starch
CFermentation of sugar
DDehydration of carbohydates
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Question 520
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The reaction of vegetable oil with a solution of wood ash is
