Which of these properties gives a solid its definite shape?
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2005
The shape of the hydrocarbon compound CH4 is
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2005
How many moles of limestone will be required to produce 5.6g of CaO?[Ca = 40, C = 12, O= 16]
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2005
Natural water collected from rivers and ponds contain oxygen, carbon (IV) oxide and
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2005
The gas that is the most dangerous pollutant to human is
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2005
The pressure of 100cm3 of oxygen at 35oC is 750mmHg. What will be the volume of gas if the pressure is reduced to 100mmHg without changing the temperature?
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2005
A heterogenous mixture can be defined as any mixture
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2005
An element wil readily form an electrovalent compound if it electron configuration is
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2005
The component of an atom that contributes least to its mass is the
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2005
Sugar is separated from its impurities by
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2005
A dense white fume is formed when ammonia gas reacts with
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2005
When pure aluminium metal is heated to red hot in the presence of nitrogen gas, the compound formed is
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2005
The density of a certain gas is 1.98gdm-3 at s.t.p. What is the molecular mas of the gas?
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2005
What is the valence shell electron configuration of the element with atomic number 17?
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2005
I. Treatment of cancerII. Detection of leakages in water mainsIII. Detection of the ages of ancient toolsIV. Preparation of drugsWhich combination of the above refers to the uses of radioactive isotopes?
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2005
In the diagram above which of the cures illustrates Arrhenius' law?
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2005
The most suitable metal that can be used as lightning conductor is
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2005
NH4Cl(s) ↔ NH3(g) + HCL(g)The reaction above can only attain equilibrium if
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2005
The gas that can be dried using concentrated tetraoxosulphate (VI) acid is
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2005
N2(g) + 3H2(g) ↔ 2NH3(g) ΔH = -90 kJIn the equation above, the yield of ammonia can be decreased by