Question 1

A solution of potassium iodate (KIO3) has a concentration of 1.75 mol dm-3. What volume (in dm3) of solution contains exactly 50 g?

Accepted Answer

A)  1.335 × 10-4 . 
B)  0.134 
C)  0.0875 
D)  2.45 
A)  1.335 × 10-4 . 
B)  0.134 
C)  0.0875 
D)  2.45

Question 2

Match the description with the state of matter it describes.
-A rigid form of matter, it has a shape and occupies a fixed volume (at a particular temperature and pressure).

Accepted Answer

A)  solid 
B)  gas 
C)  liquid 
A)  solid 
B)  gas 
C)  liquid

Question 3

In the reaction of lithium with water lithium has been ________.
2 Li(s) + 2 H2O(l) → 2 LiOH(aq) + H2(g)

Accepted Answer

Question 4

Match the non-covalent interaction with an example of a molecule pair that the non-covalent interaction acts between.
-London dispersion

Accepted Answer

A)  C2H6, C4H10 
B)  CHCl3, CH3OH 
C)  Na+ and H2O 
D)  CH3OH, H2O 
A)  C2H6, C4H10 
B)  CHCl3, CH3OH 
C)  Na+ and H2O 
D)  CH3OH, H2O

Question 5

In the reaction between zinc and hydrogen chloride, what is the oxidation state change of zinc?
Zn (s) + HCl (l) → ZnCl2 (s) + H2 (g)

Accepted Answer

A)  +2. 
B)  -2. 
C)  0. 
D)  +1. 
A)  +2. 
B)  -2. 
C)  0. 
D)  +1.

Question 6

$\Delta_{T} H_{298}^{\theta}$ What information does this symbol convey about an enthalpy change? Please select all that apply.

Accepted Answer

A)  $\Delta_{T} H$ is measured at a pressure of 1 atm. 
B)  $\Delta_{T} H$ is measured at a temperature of 298 K. 
C)  $\Delta_{T} H$ is measured under standard conditions. 
D)  $\Delta_{T} H$ is the standard enthalpy change of formation. 
A)  $\Delta_{T} H$ is measured at a pressure of 1 atm. 
B)  $\Delta_{T} H$ is measured at a temperature of 298 K. 
C)  $\Delta_{T} H$ is measured under standard conditions. 
D)  $\Delta_{T} H$ is the standard enthalpy change of formation.

Question 7

Match the description with the state of matter it describes.
-A fluid form of matter, it occupies a fixed volume (at a particular temperature and pressure) but does not have a fixed shape.

Accepted Answer

A)  solid 
B)  gas 
C)  liquid 
A)  solid 
B)  gas 
C)  liquid

Question 8

In order to make a 500 cm3 solution of potassium chloride, concentration 2 mol dm-3, what mass (in g) of potassium chloride must be dissolved in water?

Accepted Answer

A)  1 g. 
B)  74550 g. 
C)  149.10 g. 
D)  74.55 g. 
A)  1 g. 
B)  74550 g. 
C)  149.10 g. 
D)  74.55 g.

Question 9

Match the transition between two states of matter with the enthalpy change for the process.
-ΔfreezingHo

Accepted Answer

A)  Liquid to gas 
B)  Liquid to solid 
C)  Gas to solid 
D)  Solid to liquid 
A)  Liquid to gas 
B)  Liquid to solid 
C)  Gas to solid 
D)  Solid to liquid

Question 10

The combustion of butane in oxygen at 298 K is given by the following thermochemical equation:
2 C4H10 (g) + 13 O2 → 8 CO2 (g) + 10 H2O (l) $\Delta_{T} H_{298}^{\theta}$ = -2878 kJ mol-1. How much heat energy (in kJ) is supplied when 775 g of butane burn in a plentiful supply of air so that combustion is complete?

Accepted Answer

A)  38370. 
B)  2878. 
C)  2230.45 
D)  2230450. 
A)  38370. 
B)  2878. 
C)  2230.45 
D)  2230450.

Question 11

The combustion of glucose in a plentiful of supply of air is given by the following equation: W C6H12O6 (s) + X O2(g) → Y CO2 (g) + Z H2O (l). What are the values of the stoichiometric coefficients W, X, Y, and Z?
Please select all that apply.

Accepted Answer

A)  W = 2. 
B)  X = 6. 
C)  Y = 6. 
D)  Z = 6. 
A)  W = 2. 
B)  X = 6. 
C)  Y = 6. 
D)  Z = 6.

Question 12

In order to make a 750 cm3 solution of potassium iodate (KIO3), with concentration 2.5 mol dm-3, what mass (in g) of potassium iodate must be dissolved?

Accepted Answer

A)  401 g. 
B)  401241 g. 
C)  1.875 g. 
D)  535 g. 
A)  401 g. 
B)  401241 g. 
C)  1.875 g. 
D)  535 g.

Question 13

A standard solution of Ba(OH)2 (concentration 0.25 mol dm-3) was added to 50 cm3 of a HNO3 solution, concentration unknown. On addition of 28.35 cm3 Ba(OH)2, the equivalence point was reached. What is the concentration (in mol dm-3) of the sodium hydroxide solution?
Ba(OH)2 (aq) + 2 HNO3 (aq) → Ba(NO3)2 (aq) + 2 H2O (l)

Accepted Answer

A)  0.014 
B)  0.28 
C)  0.25 
D)  7.0875 × 10-3 
A)  0.014 
B)  0.28 
C)  0.25 
D)  7.0875 × 10-3

Question 14

Increasing the temperature of an endothermic reaction in dynamic equilibrium will favour the reactants.

Accepted Answer

A) True 
 B)False

Question 15

Chemists commonly use the Kelvin (T / K) and Celsius (θ / °C) temperature scales. Match the values in Celsius to the equivalent value on the kelvin temperature scale.
-0 °C

Accepted Answer

A)  373.15 K 
B)  273.15 K 
C)  0 K 
D)  298 K 
A)  373.15 K 
B)  273.15 K 
C)  0 K 
D)  298 K

Question 16

Isotopes of an element chemically react in the same manner but differ in their physical properties.

Accepted Answer

A) True 
 B)False

Question 17

Match the description with the state of matter it describes.
-A fluid form of matter, it does not have a fixed shape and will expand to fill the container it is in.

Accepted Answer

A)  solid 
B)  gas 
C)  liquid 
A)  solid 
B)  gas 
C)  liquid

Question 18

Chemists commonly use the Kelvin (T / K) and Celsius (θ / °C) temperature scales. Match the values in Celsius to the equivalent value on the kelvin temperature scale.
--273.15 °C

Accepted Answer

A)  373.15 K 
B)  273.15 K 
C)  0 K 
D)  298 K 
A)  373.15 K 
B)  273.15 K 
C)  0 K 
D)  298 K

Question 19

Match the non-covalent interaction with an example of a molecule pair that the non-covalent interaction acts between.
-Hydrogen bond

Accepted Answer

A)  C2H6, C4H10 
B)  CHCl3, CH3OH 
C)  Na+ and H2O 
D)  CH3OH, H2O 
A)  C2H6, C4H10 
B)  CHCl3, CH3OH 
C)  Na+ and H2O 
D)  CH3OH, H2O

Question 20

Match the transition between two states of matter with the enthalpy change for the process.
-ΔvapHo

Accepted Answer

A)  Liquid to gas 
B)  Liquid to solid 
C)  Gas to solid 
D)  Solid to liquid 
A)  Liquid to gas 
B)  Liquid to solid 
C)  Gas to solid 
D)  Solid to liquid

Exam 1: Fundamentals

A solution of potassium iodate (KIO3) has a concentration of 1.75 mol dm-3. What volume (in dm3) of solution contains exactly 50 g?

Match the description with the state of matter it describes. -A rigid form of matter, it has a shape and occupies a fixed volume (at a particular temperature and pressure).

In the reaction of lithium with water lithium has been ________. 2 Li(s) + 2 H2O(l) → 2 LiOH(aq) + H2(g)

Match the non-covalent interaction with an example of a molecule pair that the non-covalent interaction acts between. -London dispersion

In the reaction between zinc and hydrogen chloride, what is the oxidation state change of zinc? Zn (s) + HCl (l) → ZnCl2 (s) + H2 (g)

ΔTH298θ\Delta_{T} H_{298}^{\theta}ΔT​H298θ​ What information does this symbol convey about an enthalpy change? Please select all that apply.

Match the description with the state of matter it describes. -A fluid form of matter, it occupies a fixed volume (at a particular temperature and pressure) but does not have a fixed shape.

In order to make a 500 cm3 solution of potassium chloride, concentration 2 mol dm-3, what mass (in g) of potassium chloride must be dissolved in water?

Match the transition between two states of matter with the enthalpy change for the process. -ΔfreezingHo

The combustion of glucose in a plentiful of supply of air is given by the following equation: W C6H12O6 (s) + X O2(g) → Y CO2 (g) + Z H2O (l). What are the values of the stoichiometric coefficients W, X, Y, and Z? Please select all that apply.

In order to make a 750 cm3 solution of potassium iodate (KIO3), with concentration 2.5 mol dm-3, what mass (in g) of potassium iodate must be dissolved?

Increasing the temperature of an endothermic reaction in dynamic equilibrium will favour the reactants.

Chemists commonly use the Kelvin (T / K) and Celsius (θ / °C) temperature scales. Match the values in Celsius to the equivalent value on the kelvin temperature scale. -0 °C

Isotopes of an element chemically react in the same manner but differ in their physical properties.

Match the description with the state of matter it describes. -A fluid form of matter, it does not have a fixed shape and will expand to fill the container it is in.

Chemists commonly use the Kelvin (T / K) and Celsius (θ / °C) temperature scales. Match the values in Celsius to the equivalent value on the kelvin temperature scale. --273.15 °C

Match the non-covalent interaction with an example of a molecule pair that the non-covalent interaction acts between. -Hydrogen bond

Match the transition between two states of matter with the enthalpy change for the process. -ΔvapHo

The Language of Organic Chemistry

Atomic Structure and Properties

Diatomic Molecules

Polyatomic Molecules

Solids

Acids and Bases

Gases

Reaction Kinetics

Molecular Spectroscopy

Analytical Chemistry

Molecular Characterisation

Energy and Thermochemistry

Entropy and Gibbs Energy

Electrochemistry

Phase Equilibrium and Solutions

Isomerism and Stereochemistry

Organic Reaction Mechanisms

Halogenoalkanes: Substitution and Elimination Reactions

Alkenes and Alkynes: Electrophilic Addition and Pericyclic Reactions

Benzene and Other Aromatic Compounds: Electrophilic Substitution Reactions

Aldehydes and Ketones: Nucleophilic Addition and Α-Substitution Reactions

Carboxylic Acids and Derivatives: Nucleophilic Acyl Substitution and Α-Substitution Reactions

Hydrogen

S-Block Chemistry

P-Block Chemistry

D-Block Chemistry

Filters

A solution of potassium iodate (KIO₃) has a concentration of 1.75 mol dm^-3. What volume (in dm³) of solution contains exactly 50 g?

In the reaction of lithium with water lithium has been ________. 2 Li(s) + 2 H₂O(l) → 2 LiOH(aq) + H₂(g)

In the reaction between zinc and hydrogen chloride, what is the oxidation state change of zinc? Zn (s) + HCl (l) → ZnCl₂ (s) + H₂ (g)

$\Delta_{T} H_{298}^{\theta}$ What information does this symbol convey about an enthalpy change? Please select all that apply.

In order to make a 500 cm³ solution of potassium chloride, concentration 2 mol dm^-3, what mass (in g) of potassium chloride must be dissolved in water?

Match the transition between two states of matter with the enthalpy change for the process. -Δ_freezingH^o

The combustion of glucose in a plentiful of supply of air is given by the following equation: W C₆H₁₂O₆ (s) + X O₂(g) → Y CO₂ (g) + Z H₂O (l). What are the values of the stoichiometric coefficients W, X, Y, and Z? Please select all that apply.

In order to make a 750 cm³ solution of potassium iodate (KIO₃), with concentration 2.5 mol dm^-3, what mass (in g) of potassium iodate must be dissolved?

Match the transition between two states of matter with the enthalpy change for the process. -Δ_vapH^o