During the vulcanization of rubber, sulphur is added to
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2001
Which of the following metals burn with brick red flame?
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2001
The gas that can best be collected by downward displacement of air is
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2001
A burning candle produces water and
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2001
The pair of organic compounds that are isomers is
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2001
A characteristic reaction of the compounds with the general formula CnH2n is
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2001
When sodium reacts with water, the resulting solution is
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2001
C12H22O11(s) + H2SO4(aq) 12C(s) + 11H2O(l) + H2SO4(aq)In the reaction above, tetraoxosulphate (VI) acid function as
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2001
Which of the following represent hybridization in ethyne?
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2001
Which of the following gases contains the least number of atoms at s.t.p?
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2001
A concentrated solution containing H+, Cu2+, OH- and Cl- was electrolyzed using platinum electrodes.The ion that will be discharged at the cathode is
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2001
Which of the following decrease when a given mass of gas is compressed to half its initial volume?
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2001
A major factor considered in selecting a suitable method for preparing a simple salt is its
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2001
The diagram above represents the formation of
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2001
Use the graph above to answer this question.How long does it take all the solid to melt?`
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2001
Use the graph above to answer this question.If the gas is cooled, at what temperature will it start to condense?
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2001
Use the solubility curves below to answer questions. If 1 dm3 of a saturated solution of L at 600C is cooled to 250C, what amount in mole will separate out?
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2001
Which of the following metals burns with brick red
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2001
A particle that contains a protons, 10 neutrons and 10 electrons is