Unit 1 & 3 Higher Chemistry Quiz

What are the types of intermolecular forces?

• Van der Waals forces, ionic bonding, covalent bonding

• London dispersion forces, permanent dipole-permanent dipole interactions, and hydrogen bonding

• Ionic bonding, covalent bonding, metallic bonding

• London dispersion forces, ionic bonding, metallic bonding

Identify the reducing agent and oxidising agent in the following reaction: 2K + Cl₂ -> 2KCl

• KCl is the reducing agent and Cl₂ is the oxidising agent.

• K is the reducing agent and Cl₂ is the oxidising agent.

• K is the oxidising agent and Cl₂ is the reducing agent.

• Cl₂ is the reducing agent and K is the oxidising agent.

What is the purpose of chromatography in chemistry?

• To determine the color of a chemical substance

• To create new chemical compounds

• To measure the volume of a substance

• To separate and analyse mixtures of chemical substances

Explain how to calculate the enthalpy change for a chemical reaction using bond energies.

• Find the sum of the bond energies of the reactants and the products, then take the difference between the two sums.

• Multiply the molar mass of the reactants and products, then take the difference between the two products.

• Find the sum of the bond energies of the reactants and the products, then add the two sums together.

• Count the number of atoms in the reactants and products, then take the difference between the two counts.

What are the two factors which cause molecules to travel different distances in chromatography?

• Size of molecule and its polarity

• Temperature and pressure

• Polarity and Solubility

• Colour of molecule and its size

Name the element which exists as molecules with 8 atoms.

Calculate the enthalpy change for the following reaction: 2 H-Cl -> H-H + Cl-Cl

Which of the following is an environmental factor that affects process design?

• Cost of feedstocks

• Availability of feedstocks

• Minimising the production of toxic substances

• Percentage yield

Increasing the temperature on an ________ reaction will increase the concentration of products.

• Endothermic
• Exothermic
• Isothermic

For the reaction...
SO₂ + O₂  <=>  SO₃
If the concentration of SO₂ is increased, the equilibrium position of the reaction will shift ___________.

• to the left
• to the right
• to the left and right 
• neither left nor right