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WorksheetsIB Chemistry SL - Round 2
Total questions: 10
Worksheet time: 8mins
When an aqueous solution of sulfuric acid is added to an aqueous solution of potassium hydroxide the temperature increases. Which describes the reaction taking place?
Exothermic, sign of ΔH +
Exothermic, sign of ΔH −
Endothermic, sign of ΔH +
Endothermic, sign of ΔH −
Which is an appropriate unit for the rate of a reaction?
mol dm-3 s
mol dm-3 s-1
mol dm-3
s
What is the best definition of rate of reaction?
The time it takes to use up all the reactants
The rate at which all the reactants are used up
The increase in concentration of a product per unit time
The time it takes for one of the reactants to be used up
What is the pH of 1.0 x 10-4 mol dm-3 sulfuric acid?
−4
between 3 and 4
4
between 4 and 5
The value of Kc for the reaction between hydrogen and bromine in the gas phase to produce hydrogen bromide is 4.0 x 10-2. What is the value of Kc for dissociation of gaseous hydrogen bromide into hydrogen and bromine?
4.0 x 10-2
2.0 x 10-2
25
400
Which of the following is not a conjugate acid-base pair?
HNO3 / NO3−
H2SO4 / HSO4−
NH3 / NH2−
H3O+ / OH−
What is the IUPAC name for C(CH3)3CH2CH3?
2-methyl-2-ethylpropane
hexane
2,2-dimethylbutane
2-methylpentane
The reaction between bromine and ethene in the dark is an example of:
free radical substitution
esterification
nucleophilic substitution
addition
Which compound is an ester?
CH3COOH
CH3OCH3
C2H5CHO
HCOOCH3
The mass spectrum of a compound shows peaks with m/z values of 88, 73, 59 and 43. Which compound could give this spectrum?
HCOCH2CH2CH3
CH3CH2COOCH2CH3
CH(CH3)2COOH
CH3CH2CH2COOH
