Higher Chemistry Unit 1 - AB Test

In area X

• All molecules form an activated complex

• All reactions are successful

• Collisions always form products

• All molecules have the energy to form an activated comples

The activation energy for the reverse reaction is

• 30 kJmol

• 40 kJmol

• 10 kJmol

• -10 kJmol

What was the reaction time when the concentration of the reactant was 1mol/l

• 2.5s

• 5s

• 0.4s

• 1s

In the same period, as atomic number increases atomic size

• increases

• decreases

• remains unchained

• demonstrates no trend

Hydrogen bonds

• are the bond between to Hydrogen atoms

• are the weakest Van Der Waals force

• form between covalently bonded Hydrogen and the elements F, O and N

• Are covalent bonds

Which of the following elements has the capability to form covalent networks

• Sulfur

• Phosphorous

• Silicon

• Beryllium

Ionisation energy is defined as

• the energy required to discharge 1 mole of electrons from an element in a gaseous state

• the energy required to remove 1 shell of electrons

• the energy required to discharge 1/2 a mole of electrons

• The elements attraction for bonding electrons in a covalent bond

Which of the following chlorides would have the least ionic character

• PCl₃

• LiCl

• KCl

• HCl

Which of the following exist as discrete molecules

• Silicon Dioxide

• Sulfur

• Aluminium Hydroxide

• Neon

Fullerines (C₆₀) can be described as

• a covalent network

• discrete covalent molecules

• conductors of electricity

• ionic compounds