WorksheetsIB Chemistry Mock Exam Review #1
Total questions: 20
Worksheet time: 41mins
Which one of the following is the electron arrangement of the strongest reducing agent?
1s2 2s2 2p5
1s2 2s2 2p6 3s2
1s2 2s2 2p6 3s2 3p5
1s2 2s2 2p6 3s2 3p6 4s2
The removal of silicon dioxide with limestone in the Blast Furnace can be represented by the following equation.
CaCO3(s) + SiO2(s) → CaSiO3(l) + CO2(g)
The minimum mass of calcium carbonate needed to remove 1.00 tonne (1000 kg) of silicon dioxide is
0.46 tonne
0.60 tonne
1.67 tonne
2.18 tonne
The removal of silicon dioxide with limestone in the Blast Furnace can be represented by the following equation.
CaCO3(s) + SiO2(s) → CaSiO3(l) + CO2(g)
The volume of carbon dioxide, measured at 298 K and 1.01 × 105 Pa, formed in this reaction during the removal of 1.00 tonne (1000 kg) of silicon dioxide is
24.5 dm3
408 dm3
24.5 m3
408 m3
Which one of the following statements is not correct?
The atomic radii of Period 3 elements decrease from sodium to chlorine.
The hydroxides of Group II metals increase in solubility as the group is descended.
In water, aluminium chloride is hydrolysed more than magnesium chloride.
SiO2 has a higher melting point than P4O10 because of stronger London dispersion forces.
Molecules with a permanent dipole include
1 NH3
2 PCl3
3 SCl2
4 SiCl4
1, 2 and 3 only are correct.
1 and 3 only are correct.
2 and 4 only are correct.
4 only is correct.
The percentage by mass of the elements in a compound is
C=72%, H=12%, O=16%.
What is the mole ratio of C : H in the empirical formula of this compound?
1:1
1:2
1:6
6:1
Which of the reactions below occur as written?
I. Br2 +2I− →2Br− +I2
II. Br2 +2Cl− →2Br− +Cl2
I only
II only
Both I and II
Neither I nor II
Based on electronegativity values, which bond is the most polar?
B⎼C
C⎼O
N⎼O
O⎼F
Which of the quantities in the enthalpy level diagram below is (are) affected by the use of a catalyst?
I only
III only
I and II only
II and III only
In the reaction below
N2(g)+3H2(g) →2NH3(g) ∆H =−92kJ
which of the following changes will increase the amount of ammonia at equilibrium?
I. Increasing the pressure
II. Increasing the temperature
III. Adding a catalyst
I only
II only
I and II only
II and III only
What is the coefficient for H+ when the equation below is balanced?
⎽⎽ Pb(s)+ ⎽⎽ NO3−(aq) + ⎽⎽ H+(aq) →
⎽⎽ Pb2+(aq)+ ⎽⎽NO(g)+⎽⎽H2O(l)
2
4
6
8
Which statement about neighbouring members of all homologous series is correct?
They have the same empirical formula.
They differ by a CH2 group.
They possess different functional groups.
They differ in their degree of unsaturation.
Which of the following atoms has/have one or more unpaired electrons?
I. Iron
II. Copper
III. Zinc
I only
III only
I and II only
I, II and III
Atomic line spectra provide information about the ⎽ I ⎽ in atoms through the ⎽ II ⎽ .
I. energy levels
II. distance between lines
I. atomic mass
II. pattern of the lines
I. number of electrons
II. number of lines
I. nuclear charge
II. intensity of the lines
In which pair is the first species larger than the second?
Cl and Cl−
Na+ and Na
Na and K
Si and Cl
The carbon-carbon-carbon bond angle in CH3CHCH2 is closest to
180°
120°
109°
90°
The molar mass of an unknown gas is to be determined by weighing a sample. As well as its mass, which of the following must be known?
I. Pressure
II. Temperature
III. Volume
I only
II only
I and II only
I, II and III
Using the information below:
H2 (g) + O2 (g) → H2O2 (l) ∆H = −187.6kJ
2H2 (g) + O2 (g) → 2H2O(l) ∆H = −571.6kJ
what is the value of ∆H (in kJ) for the following reaction?
2H2O2 (l) → 2H2O(l) + O2 (g)
-196.4
-384.0
-759.2
-946.8
CaCO3 (s) + 2HCl (aq) → CaCl2 (aq) + H2O (l) + CO2 (g)
Which change will increase the rate of the above reaction when 50 cm3 of 1.0 moldm−3 HCl is added to 1.0 g of CaCO3?
The volume of HCl is increased.
The concentration of HCl is decreased.
The size of the CaCO3 solid particles is decreased.
The pressure of the CO2 is increased.
The rate of a chemical reaction increases with increasing temperature. This increase in reaction rate is due to
I. an increase in the collision rate.
II. a decrease in the activation energy.
III. an increase in the number of molecules that react.
I only
II only
I and III only
I, II and III
