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Which of the following factors will affect the rate of the reaction represented by the following equation?
2HCl(aq) + CaCO3(s) \(\rightarrow\) CaCl2(aq) + H2O(1) + CO2(g)
I. Pressure
II.Concentration
III. Nature of reactants
IV. Temperature
AI and II only
BII, III and IV only
CI, II and III only
DI, II. III and IV
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Question 12
waec2016
Chemical equilibrium is attained when
AAll the reactants have been completely used up
BThe reaction goes to completion
CThe concentration of reactants and products remain constant
DThe concentration of reactants and products are equal
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Question 13
waec2016
The refreshing characteristic taste of fizzy drinks is due ot the presence of
ACarbon(IV)oxide
BGlucose
CHydrogen
DSodium Citrate
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Question 14
waec2016
Consider the following reaction equation
H3O+(aq) + OH(aq) \(\rightarrow\) 2H2O(1)
The reaction represents
AEsterification
BHydrolysis
CNeutralization
DRedox
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Question 15
waec2016
The pH of four solutions M,N,Q and R are 2,6,8 and 11 respectively.
Which of the following deductions about the solutions is correct?
AThe pH of N is increased when the solution is diluted
BThe pH of Q is increased when the solution is evaporated
CM is the most alkaline solution
DR is the most acidic solution
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Question 16
waec2016
When NH4Cl(s) is dissolved in water, the container feels cold to touch. This implies
AThe process is endothermic
BThe process is exothermic
CNH4Cl forms a saturated solution
DNH4Cl is highly soluble in water
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Question 17
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An aqueous solution of (NH4)2 SO4 is
AAcidic
BAlkaline
CAmphoteric
DNeutral
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Question 18
waec2016
The energy which accompanies the addition of an electron to an isolated gaseous atom is
AAtomization
BElectronegativity
CElectron affinity
DIonization
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Question 19
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Propane carbon(IV)oxide diffuse at the same rate because [H = 1.00, C = 12.0, O = 16.0]
AThey are both gases
BTheir molecules contain carbon
CThey have the same relative molecular mass
DBoth are denser than air
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Question 20
waec2016
The spreading of the scent of a flower in a garden is an example of_____?
ABrownian motion
BDiffusion
COsmosis
DTynadal effect
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Question 21
waec2016
The general gas equation \(\frac{PV}{T}\) = K is a combination of
ABoyle's and Charles' laws
BBoyle's and Graham's laws
CCharles' and Graham's laws
DDalton's and Graham's laws
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Question 22
waec2016
Which of the following apparatus can be used to measure a specific volume of a liquid accurately?
ABeaker
BConical flask
CMeasuring cyclinder
DPipette
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Question 23
waec2016
Which of the following statements about solids is correct?
ASolid particles are less orderly than those of a liquid
BSolid have lower densities than liquids
CSolid particles have greater kinetic energies than those of liquids
DSolid particles cannot be easily compressed
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Question 24
waec2016
How many moles of oxygen would contain 1.204 x 1024 molecules?
[Avogadro's constant (NA) = 6.02 x 1023]
A1
B2
C3
D4
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Question 25
waec2016
An element X froms the following oxides X2O, XO and XO2. This phenomenon illustrates the law of________?
AConservation of mass
BDefinite proportion
CMass action
DMultiple proportion
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Question 26
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The bond formed between H2O and H+ to form the hydroxonium H3O+ is
ADative
BCovalent
CElectrovalent
DIonic
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Question 27
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The minimum amount of energy required for effective collisions between reacting particles is known as
AActivation energy
BBond energy
CKinetic energy
DPotential energy
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Question 28
waec2016
Which of the following elements would produce coloured ion in agueous solution?
ACalcuim
BCopper
CMagnesuim
DSodium
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Question 29
waec2016
The shape of the water molecule is_______?
ALinear
BPyramidal
CTetrahedral
DV-shaped
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Question 30
waec2016
Which of the following arrangements shows increasing order of reactivity of the halogens?
