Structure and Bonding
Describe the structure of a metallic solid AND include the type of bond
A substance consisting of a 3D lattice of positive metal ions surrounded by a sea of delocalised valence electrons.
What homologous series consists of hydrocarbons containing at least one carbon-carbon double bond?
Alkenes
In redox chemistry, how are oxidation and reduction defined in terms of electron transfer?
Oxidation is the loss of electrons (LEO); reduction is the gain of electrons (GER)
Which radioactive isotope found naturally in high amounts makes bananas slightly radioactive?
Potassium-40 (40K)
Where was Ms Swift born?
What physical quantity, calculated by subtracting bonds formed from bonds broken, is denoted by the symbol ΔH?
Enthalpy Change
What color change occurs when bromine water (Br2) reacts with an unsaturated alkene?
Orange/Brown to Colourless
What colour change occurs when purple permanganate ions (MnO4-) act as an oxidising agent under acidic conditions?
From purple to colourless (forming Mn2+).
What unique geometric shape is wombat feces?
Cube-shaped
What senior sciences can Ms Swift teach?
Chemistry
Earth and Space Science
Agriculture/Horticulture
(EVERYTHING EXCEPT PHYSICS)
Diamond and graphite both contain covalent bonds, but why does graphite conduct electricity while diamond does not?
Graphite has delocalised valence electrons that can move and carry charge.
According to Markovnikov’s rule for asymmetrical alkene addition, which carbon atom receives the incoming hydrogen atom?
The carbon atom in the double bond that already has the greater number of hydrogen atoms attached ("rich get richer").
What is the oxidation number of sulfur in sulfur dioxide (SO2)
+4
Which two elements on the periodic table exist as liquids at standard room temperature and pressure?
Mercury (Hg) and Bromine (Br2)
What are the names of Ms Swifts pets?
Luna Lovegood
Rosalind Franklin
Why does a water molecule (H2O) have a bent molecular shape despite having four regions of electron density around the central oxygen atom?
It has 2 bonding pairs and 2 non-bonding lone pairs, which repel each other to form a bent shape.
What colour change indicates that a primary alcohol has been oxidised by acidified potassium dichromate (Cr2O72-/H+)?
From orange to green.
What observation occurs when chlorine gas (Cl2) is bubbled through a solution containing iodide ions (I-)?
The solution turns brown (or dark red/brown) as iodine (I2) is produced.
What extremely dense gas lowers the pitch of a person's voice when inhaled, making them sound deep and robotic?
Sulfur hexafluoride (SF6)
How long has Ms Swift been at Rolleston College?
8 years
Is bond breaking an endothermic or exothermic process, and what is the sign of its enthalpy change (ΔH)?
Endothermic (+ve ΔH).
What two conditions must be present for a molecule to exhibit cis/trans (geometrical) isomerism?
A double C=C bond to prevent rotation, and two different groups attached to each double-bonded carbon atom.
What species is formed when zinc metal (Zn) reacts with dilute acid, and what observation accompanies this reaction?
Zn2+ ions and hydrogen gas (H2); effervescence/fizzing is observed.
What type of organism accidentally contaminated Alexander Fleming's petri dishes, leading to the discovery of penicillin?
Mould (Penicillum fungus)
What are Ms Swifts TWO degree majors?
Human Nutrition
Biological Science