5538245
Questão 1
Questão
Which of these atoms has the largest atomic radius?
Responda
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Ar
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Cl
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Mg
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Na
Questão 2
Questão
Which of these species is the best reducing agent?
Responda
Questão 3
Questão
Which of these pieces of apparatus has the lowest percentage uncertainty in the measurement shown?
Responda
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Volume of 25 cm^3 measured with a burette with an uncertainty of +-0.1cm^3
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Volume of 25cm^3 measured with a measuring cylinder with an uncertainty of +-0.5cm^3
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Mass of 0.150g measured with a balance with an uncertainty of +-0.001g
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Temperature change of 23.2 degrees C measured with a thermometer with an uncertainty of +-0.1 degrees C
Questão 4
Questão
A student is provided with a 5.00 cm^3 sample of 1.00 x 10^-2 mol dm^-3 hydrochloric acid. The student is asked to devise a method to prepare a hydrochloric acid solution with a concentration of 5.00 x 10^-4 mol dm^-3 by diluting the sample with water.
Which of these is the correct volume of water that should be added?
Responda
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45.0 cm^3
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95.0 cm^3
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100 cm^3
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995 cm^3
Questão 5
Questão
Which of these species has a trigonal planar structure?
Responda
Questão 6
Questão
Use your understanding of intermolecular forces to predict which of these compounds has the highest boiling point.
Responda
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HF
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HCl
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HBr
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HI
Questão 7
Questão
What type of bond is formed between N and B when a molecule of NH3 reacts with a molecule of BF3?
Responda
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Ionic
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Covalent
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Co-ordinate
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Van der Waals
Questão 8
Questão
Which of these atoms has the highest electronegativity?
Responda
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Na
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Mg
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Cl
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Ar
Questão 9
Questão
Which of these atoms has the smallest number of neutrons?
Responda
Questão 10
Questão
Which of these substances does NOT show hydrogen bonding?
Responda
Questão 11
Questão
What is the formula of Calcium Nitrate(V)?
Responda
Questão 12
Questão
Which of these elements has the highest second ionisation energy?
Responda
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Na
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Mg
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Ne
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Ar
Questão 13
Questão
Which of the following shows chlorine in its correct oxidation states in the compounds shown?
Responda
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-1 +3 +1
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+1 -5 -1
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-1 +5 +1
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+1 +5 -1
Questão 14
Questão
Which substance is NOT produced in a redox reaction when solid sodium iodide reacts with concentrated sulfuric acid?
Responda
Questão 15
Questão
Which of the following contains the most chloride ions?
Responda
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10 cm^3 of 3.30 x 10^-2 mol dm^3 aluminium chloride solution
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20 cm^3 of 5.00 x 10^-2 mol dm^3 calcium chloride solution
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30 cm^3 of 3.30 x 10^-2 mol dm^3 hydrochloric acid
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40 cm^3 of 2.50 x 10^-2 mol dm^3 sodium chloride solution
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