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G11 Chem SS #2 Flashcards | StudBud
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G11 Chem SS #2
G11 Chem SS #2
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1
All the following are giant ionic compounds EXCEPT:
SiO2
Al2O3
MgO
Na2O
2
Isotopes are atoms of the same element with different number of protons
False
True
3
Orbitals hold electrons that have
orbitals only hold 1 electron
parallel spin
no spin
opposite spin
4
Silicon dioxide has all the following properties except:
Strong/durable
High melting point
Insoluble in water
A good conductor of electricity
5
When both shared electrons come from one atom, it is called a :
Resonance bond
Hybridisation bond
Coordinate bond
Hydrogen bond
6
A spoon holds 0.5moles of H2PO4. How many molecules of H2PO4 are present?
12.04*10^23
3.01*10^23
1.285*10^12
6.02*10^23
7
Avogadro's law states:
The relationship between pressure and volume is inverse
equal volume of gases contain equal number of particles
PV=nRT
equal mass of gases contain equal number of particles
8
Real gases deviate from ideal gases the most at low temperatures and high pressure
True
False
9
Which one of these is a homogeneous mixture ?
oil in water
cereal in milk
salt in water
metal nails in molten lava
10
A non-polar substance is soluble in water
False
True
11
Aluminium oxide affects the pH when added to water
True
False
12
Here, A stands for:
Atomic Number
Mass Number
Isotope Number
Element Symbol
13
Label the 2 spectrums:
Top: Absorption Spectrum Bottom: Emission
Top: Emission Spectrum Bottom: Absorption
14
Hydrogen bonding occurs between H and all below except:
F
N
O
K
15
Halogens have higher electronegativity values than alkali metals
True
False
16
H2O has what type of geometry and bond angle?
Bent/v-shaped, 107degrees
Bent/v-shaped, 105degrees
Trigonal pyramidal, 105degrees
Trigonal pyramidal, 107degrees
17
The maximum amount of product able to be produced is the:
Hypothetical yield
Theoretical yield
Experimental yield
Actual yield
18
The Aufbau Principle states that electrons are placed in orbitals of lowest energy
False
True
19
All of these properties increase across a period EXCEPT:
First ionisation energy
Atomic radius
Electronegativity
Nuclear charge
20
Atomic orbitals are:
A region where there is a 100% probability of finding an electron
A region where electrons exist
A region where there is more than 50% probability of finding an electron
A region where there is a 90% probability of finding an electron
21
Number of moles * molar mass=
mass in cm^3
number of particles
number of moles
mass in grams
22
We are unable to determine where an electron is at any given time.
False
True
23
For isotopes: ________ properties are the same but ________ properties differ.
Chemical / physical
Incorrect: chemical and physical properties both differ
Incorrect: chemical and physical properties are the same
Physical / chemical
24
A resonance structure is when electrons are delocalised and able to spread themselves out over different bonds
False
True
25
When an electron falls back down to the ground state:
It absorbs chemical energy
It releases chemical energy
It releases electromagnetic radiation
It absorbs electromagnetic radiation
26
Ionic compounds have lattice structures that are:
Ductile
Able to conduct electricity in solid form
Brittle
Malleable
27
The 3d sublevel always falls below the 4s level
False
True
28
Which has the best thermal conductivity
Graphite
Fullerene
Graphene
Diamond
29
For PV=nRT, temperature MUST be in kelvin
True
False
30
The atomic nucleus comprises of protons and neutrons ONLY
True
False
31
Which intermolecular force is the strongest?
London Dispersion
Dipole-dipole
Dipole-induced dipole
Hydrogen bonding
32
All the oxides below are acidic EXCEPT:
SiO2
MgO
Cl2O
P4O10
33
Which intermolecular force is present in ALL molecules?
London Dispersion
Covalent bonding
Dipole-dipole
Dipole induced dipole
34
Which one of these formulas is incorrect:
n=rT
n=mass/molecular weight
n=Volume/molar volume
n=CV
35
As electron levels increase, energy levels:
Increase in size
Converge
Diverge
Decrease in size
36
Carbon dioxide is a polar molecule
True
False
37
Which shows a compound in the simplest ratio of atoms?
Ionic formula
Molecular formula
Empirical formula
Chemical formula
38
A polar bond involves one positive and one negative side
True
False
39
The 2p sub-level is able to hold _______ electrons
2
3
6
4
40
The relationship between volume and temperature:
Slight negative correlation
Inversely proportional
Directly proportional
Unrelated
41
Which molecule has pure covalent bonds?
CO2
H2SO4
H2O
O2
42
Gases have the properties of all below except:
strong inter-particle forces
no fixed shape
no fixed volume
particles move freely
43
Bond strength
increases with distance
increases with bond length
decreases with bond length
decreases when more electrons are involved