transition metals Exam
Quiz
•
Chemistry
•
12th Grade
•
Hard
Mohamed Awaad
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23 questions
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1.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
One of the following compounds its aqueous solution The chemists uses it in chemical reactions while The doctor uses in clinics.
Fehling's solution
MnO2
K2Cr2O7
KMnO4
2.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
To make a safe for saving money, it is preferable to use …
Titanium
steel _ vanadium
Iron _ Manganese
Nickel _ Steel
3.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
aluminum is a representative element with atomic number 13 that can form alloys of certain properties with many elements.
Element A forms with it an alloy that maintains durability in even high temperatures
Element B is an alloy that resists corrosion.
Which of the following statements is true ?
A as element used to protect the skin from sunlight
Element B in its pure state has no uses
It is used in very bright lamps for television photography
B With the preceding one, resists corrosion at high temperatures
4.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
All that has a role in protection against corrosion (rust), except
Ni
Cr
Mn
Zn
5.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Study the following figure and choose the following
All manganese oxides are basic oxides
scandium has both basic and acidic oxides
Fe2O3 reacts with diluted acids better than FeO
CrO reacts with diluted acids better than CrO3
6.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Any of the following solutions appear blue
ScCl3
CrCl3
VCl3
ZnCl2
7.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
The transitional element ion A+x the number of electrons missing from the sublevel 4s is equal to that missing from sublevel 3d and the number of its single electrons in this case is 3 . The oxide formula in the highest oxidation state is….
AO2
AO
A2O7
A2O5
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