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Leaving Cert Chemistry Revision Mr. Scully Flashcards | StudBud
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Leaving Cert Chemistry Revision Mr. Scully
Leaving Cert Chemistry Revision Mr. Scully
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Answers
1
Octanol dissolves in water?
False
True
2
What is the formula of iron(II)carbonate?
FeCO3
Fe2CO3
FeCO4
FeCO2
3
The electronic configuration of Calcium is 2,8,8,2 How many electrons are in the valence shell?
none of the above
8
4
2
4
What shape are the p orbitals?
dumbbell
spherical
5
If you add heat to an exothermic reaction you favour the reverse reaction
False
True
6
What is this compound
2-methylethane
methylpropane
butane
pentane
7
If a stress is applied to a system at equilibrium, the system re-adjusts to relieve the stress applied
Le Chatelier's principle
Hooke's principle
The principle of conservation
Heisenberg's uncertainty principle
8
What type of radiation is being emitted?
Cathode rays
Gamma rays
Beta particles
Alpha particles
9
How many particles are in a mole?
6 x 1023
Avogadros number
none of the above
6,230 x 10
10
Potassium burns with a red flame
False
True
11
Which scientist discovered the nucleus? (gold foil experiment)
J.J. Thompson
Neils Bohr
Ernest Rutherford
John Dalton
12
What is this compound?
Benzaldehyde
Phenol
Benzoic acid
13
How many neutrons are in
45
21
Sc
3+
24
21
66
45
14
Premier Periclase manufactures what product?
Ammonia
Urea
Magnesium Oxide
Nitric Acid
15
Dmitri Mendeleev arranged the elements in order of increasing atomic number?
False
True
16
What shape is this molecule?
trigonal planar
Tetrahedral
Pyramidal
Bent, angular
17
The electron configuration of Copper is 1s
2
,2s
2
,2p
6
,3p
6
,4s
2
,3d
9
?
True
False
18
What contribution to the Periodic table did John Newlands make?
Triads
Periodic Law
Octaves
19
Who was the first scientist to explain the Hydrogen emission spectrum?
Neils Bohr
Robert Millikan
Ernest Schrodinger
James Chadwick
20
Atomic radii increase as you go down the group and decrease as you go across period
True
False
21
If you increase the pressure what direction do you push the equilibrium? (they are all gases)
to the right
to the left
22
What type of bonding is this?
Covalent bonding
Ionic bonding
Metallic bonding
Dative bonding
23
Electronegativity decreases as you go down the group and increases as you go across the period?
True
False
24
It is impossible to measure at the same time both the velocity and the position of an electron, who proposed this?
William Crookes
Robert Mosely
Werner Heisenberg
Ernest Schrodinger
25
pH + pOH = ?
1 x 10-7
14
pOH2
6 x 1023
26
What is a substance that only slightly dissociates in water to give hydroxide ions
weak base
strong acid
strong base
weak acid
27
How many electrons are in
45
21
Sc
3+
?
24
45
21
18
28
React a carboxylic acid with an alcohol and you get...
ketone
aldehyde
they don't react
ester
29
Which scientist discovered the electron?
Ernest Rutherford
Neils Bohr
J.J. Thompson
John Dalton
30
Which of the following is the feedstock for Magnesium oxide?
Ammonia
Seawater
Urea
Sulphuric acid
31
Which chemical is used to test for the nitrate ion?
HCl
Silver nitrate
FeSO4
BaCL2
32
If you have 84g of carbon, how many moles of carbon do you have?
6
72
12
7
33
Methane is a polar molecule?
True
False
34
Which of the following has the highest octane number?
pentane
2,2,4-trimethylpentane
cyclohexane
heptane
35
What type of radiation is being emitted?
Cathode rays
Beta particles
Alpha particles
Gamma rays
36
Which chemical is used to test for the sulphate/sulphite ion?
Silver nitrate
HCl
BaCL2
FeSO4
37
Which chemical is used to test for chloride ion?
BaCL2
Silver nitrate
FeSO4
HCl
38
The electronic configuration of Calcium is 2,8,8,2 How many shells are occupied?
4
none of the above
8
2
39
If you react ethanol with Al
2
O
3
you get
ethyne
ethanoic acid
ethene
ethane
40
________________ are atoms of the same element which have different mass number but the same atomic number.
Molecules
Isotopes
Ions
allotropes
41
Which describes the Balmer series of electron transitions?
n=3 dropping to n=1
n=5 dropping to n=3
n=4 dropping to n=2
n=2 dropping to n=1
42
What rule is being demonstrated by the electron arrangement in 2p
Heisenbergs uncertainty principle
Hund's rule of maximum multiplicity
Pauli exclusion principle
Aufbau principle
43
Which is the correct formula for calcium chloride?
CaCl2
CaCl
Ca2Cl
Ca2Cl2
44
Which scientist came up with the atomic theory?
John Dalton
Ernest Rutherford
Neils Bohr
J.J. Thompson
45
Who defined an acid as a substance that dissociates in water to produce H+ ions?
Bronsted-Lowry
Arrhenius
46
What shape is this molecule?
Tetrahedral
Pyramidal
trigonal planar
Bent, angular