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Worksheetsquiz 4 general properties
Total questions: 25
Worksheet time: 2hrs 5mins
The compounds FeCl2, FeCl3 and Fe2(SO4)3 are ……………
paramagnetic and coloured
diamagnetic and colourless.
paramagnetic and colourless
diamagnetic and coloured
Which of the following ions has colored aqueous solutions?
Fe3+ only
Al3+ only
Fe3+ and Ni2+ only
Al3+, Fe3+ and Ni2+
In which of the following equations (M) represents scandium?
FeO(s) + M(s) → Fe(s) + MO(s)
2M(s) + 6H2O(l) → 2M(OH)3(aq) + 3H2(g)
M(s) + H2SO4(aq) → MSO4(aq) + H2(g)
2M(s) + O2(g) → 2MO(s)
Which of the following compounds when heated does not lead to the evolution of O2 gas?
KMnO4
(NH4)2Cr2O7
K2Cr2O7
H2O2
Which of the following compounds its aqueous solution is colored?
Zn(NO3)2
LiNO3
Co(NO3)2
Ba(NO3)2
CuSO4.5H2O is blue because …
SO4 2– ions absorb the red light from the visible spectrum
Cu2+ ions absorb all the spectrum colors except red
Cu2+ ions absorb all the orange light from the visible spectrum
Each CuSO4 molecule combines with 5H2O molecules
Two iron ores : (A) is preferred than (B) , the reason is ……….
(A) contains more ratio of sulphur, phosphors & iron
(B) contains less ratio of sulphur , phosphors & iron
(A) contains less ratio of sulphur , phosphors & arsenic
(B) contains more ratio of iron
The correct order of magnetic moment is:
FeCl3 > TiO2 > Cr2O3
Cr2O3 > FeCl3 > TiO2
FeCl3 > Cr2O3 > TiO2
TiO2 > FeCl3 > Cr2O3
The magnetic moment of … is 4
Cu +2
Mn+6
Fe+2
Zn+2
The chromium compound that have a green color has ….. free electrons in its ions
1
2
3
4
An element X is located in the fifth vertical column of the periodic table. The formula of its oxide that repel with the external magnetic field is …..
XO
XO2
X2O3
X2O5
If a substance absorbs both yellow and green colors in certain ratio, it will appear to the eye as …....
Yellowish orange
Reddish yellow
Greenish blue
Reddish violet
All the following describes scandium excepts …...
Forms colorless compounds
Rare transition element in the earth crust
Metal react with water through a vigorous reaction
Forms compound in oxidation state 4+
All transition metals are characterized by …
Ability to be magnetized
Several oxidation states
Forming colored solutions
Electric conductivity
Which of the following pairs of hydrated ions has relatively close colors?
Al 3+ and Mn 2+
Ti3+ and V2+
Cr3+ and Fe2+
Cu+ and Ni2+
Which of the following compounds is used in providing the glass with green color?
Cu2O
TiO2
MnO2
Cr2O3
Which of the following hydrated ions is yellow?
Fe3+
Zn2+
Cu+
Cr3+
If the melting point of nickel = 1492°C and of chromium = 1890°C, so the melting point of alloy which is formed by combination of the two metals = …... °C
1700
1900
3500
2000
All these compounds are colored except …
MnO
ZnSO4
TiCl2
V2O3
Which of the following statements that compare two d-block elements is correct?
Titanium is denser than nickel but has a smaller atomic radius.
Titanium is less dense than nickel but has a larger atomic radius.
Titanium is denser than nickel and has a larger atomic radius.
Titanium is less dense than nickel and has a smaller atomic radius.
.All the following compounds are attracted to the external magnetic field, except ……………
FeCl3
MnO2
ZnCl2
CuSO4
The element which has the electronic configuration [Kr], 5s2 , 4d10 is ……………
paramagnetic in its atomic state
paramagnetic at oxidation state (+2)
diamagnetic in its atomic state
No correct answer
Which of the following ions is diamagnetic and uncolored?
Ti 4+
Mn2+
Fe2+
V 2+
The following compounds are paramagnetic and colored , except .......
ScCl3
FeCl3
FeCl2
CuCl2
When the d-sublevel is empty in the ion configuration that indicate for………
The substance is colorless solution
The substance is diamagnetic
The substance is active
a & b are correct
