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WorksheetsExam buster module 2
Total questions: 15
Worksheet time: 32mins
A radioactive decay from 23290𝑇ℎ to 20882 𝑃𝑏 involves a series of alpha- and beta-particle emissions. The number of alpha-particle emissions involved in the series of radioactive decay is:
3
4
5
6
What is the electron configuration for Chromium?
[Ar] 4s1 3d5
[Ar] 4s2 3d5
[Ar] 4s1 4d4
[Ar] 4s2 3d4
Which of the following represent an unstable compound?
Si2H6
Si2H4
C2H6
C2H4
Which of the following is the most likely explanation why SF6 exists but OF6 does not?
Sulfur contains a d-orbital which allows it to expand its octet and form more than 2 bonds
Oxygen cannot form pi bonds due to its larger atomic radius
Oxygen is more electronegative than sulfur
Sulfur has multiple allotropes
Which species below is least likely to function as a ligand?
NH3
Na+
Cl-
CN
If an unstable isotope is located above the band of stability it will undergo:
Beta decay
Alpha emission
Positron emission
Electron capture
An ancient fossil was discovered on the Isle of Svalbard, back in the lab it was found to contain 3.0 x 10-15 C14:12. If living creatures contain 1.33x10-12 approximately how old is the fossil?
50 300 years old
400 years old
5 300 years old
40 000 years old
What is the maximum oxidation state of Carbon?
12
6
5
4
Which of these are not allotropes of carbon?
Fullerene
Carbonate
Diamond
Graphite
The source(s) of sulphur dioxide in the atmosphere is / are:
Fossil-fuel combustion to produce electricity
Fossil-fuel combustion in car engines
Production of zinc metal from sulphide ores
All of the above
A square planar complex contains bidentate ligands, what is its co ordination number?
2
4
8
There is not enough information to answer this
What is the oxidation state of copper in [Cu(NH3)3(CN)3]2-?
-1
+1
-2
+2
FeCl8 is likely to absorb what wavelength of light and why?
Short wave lengths, because it is high spin
Long wave lengths, because it is low spin
Short wavelengths, because it is low spin
Long wavelengths, because it is high spin
The half-life of tritium (hydrogen-3) is 12.3 yr. If 48.0 mg of tritium is released from a power plant during the course of an accident, how much will remain after 24.6 years?
48.0 mg
24.0 mg
12.0 mg
0 mg
Which atmospheric gases lead to the greenhouse effect?
CO2 and O3
H2O and CO2
H2O and O3
O3 and O2
