1
AIEEE 2003
+4
-1
What would happen when a solution of potassium chromate is treated with an excess of dilute nitric acid?
A
$$Cr_2O^{2-}_7$$ and H2O are formed
B
$$CrO^{2-}_4$$ is reduced to +3 state of Cr
C
$$CrO^{2-}_4$$ is oxidized to +7 state of Cr
D
Cr3+ and $$Cr_2O^{2-}_7$$ are formed
2
AIEEE 2003
+4
-1
The atomic numbers of vanadium (V), Chromium (Cr), manganese (Mn) and iron (Fe) are respectively 23, 24, 25 and 26. Which one of these may be expected to have the highest second ionization enthalpy?
A
Cr
B
Mn
C
Fe
D
V
3
AIEEE 2003
+4
-1
Which one of the following nitrates will leave behind a metal on strong heating?
A
Copper nitrate
B
Manganese nitrate
C
Silver nitrate
D
Ferric nitrate
4
AIEEE 2003
+4
-1
The radius of La3+ (Atomic number of La = 57) is 1.06 Å. Which one of the following given values will be closest to the radius of Lu3+ (Atomic number of Lu = 71) ?
A
1.40 Å
B
1.40 Å
C
0.85 Å
D
1.60 Å
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