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WorksheetsLanthanide
Total questions: 8
Worksheet time: 4mins
Name
Class
Date
1.
Which element is not in the rare earth metal family?
a)
B
b)
Gd
c)
Nh
d)
Pt
2.
Basic strength of oxides and hydroxides decrease with ……. atomic number
a)
Remain unchanged
b)
Increase
c)
Decrease
3.
What types of binary ionic compounds well known for all lanthanides
a)
Oxides,halides,nitrides and hydrides
b)
None of these
c)
Oxides and halides
d)
Hydrides and nitrides
4.
Oxidation state of Lanthanum (iii) oxide, La2O3 is
a)
-1
b)
-2
c)
+3
d)
+4
5.
Is lanthanum hydroxides soluble in water
a)
Yes
b)
No
6.
Choose the right chemical equation for burning of lanthanoid (Ln) in oxygen
a)
4Ln + 3O2 —> 2LnO
b)
4Ln + 3O2 —> Ln2O3
c)
Ln + O2 —> LnO
d)
4Ln + 3O2 —> 2Ln2O3
7.
Most basic hydrides among the following is
a)
Lu(OH)3
b)
Ce(OH)3
c)
Tb(OH)3
d)
Yb(OH)3
8.
What is the most reactive element in the lanthanide?
a)
Gadolinium
b)
Europium
c)
Lutetium
d)
Thulium
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