1
AIEEE 2007
MCQ (Single Correct Answer)
+4
-1
Identify the incorrect statement among the following :
A
d-Block elements show irregular and erratic chemical properties among themselves
B
La and Lu have partially filled d orbitals and no other partially filled orbitals
C
The chemistry of various lanthanoids is very similar
D
4f and 5f orbitals are equally shielded
2
AIEEE 2007
MCQ (Single Correct Answer)
+4
-1
The actinoids exhibits more number of oxidation states in general than the lanthanoids. This is because :
A
the 5f orbitals are more buried than the 4f orbitals
B
there is a similarity between 4f and 5f orbitals in their angular part of the wave function
C
the actinoids are more reactive than the lanthanoids
D
the 5f orbitals extend further from the nucleus than the 4f orbitals
3
AIEEE 2006
MCQ (Single Correct Answer)
+4
-1
Lanthanoid contraction is caused due to :
A
the appreciable shielding on outer electrons by 4f electrons from the nuclear charge
B
the appreciable shielding on outer electrons by 5d electrons from the nuclear charge
C
the same effective nuclear charge from Ce to Lu
D
the imperfect shielding on outer electrons by 4f electrons from the nuclear charge
4
AIEEE 2006
MCQ (Single Correct Answer)
+4
-1
A metal, $$M$$ forms chlorides in its $$+2$$ and $$+4$$ oxidation states. Which of the following statements about these chlorides is correct?
A
$$MC{l_2}$$ is more ionic than $$MC{l_4}$$
B
$$MC{l_2}$$ is more easily hydrolysed than $$MC{l_4}$$
C
$$MC{l_2}$$ is more volatile than $$MC{l_4}$$
D
$$MC{l_2}$$ is more soluble in anhydrous ethanol than $$MC{l_4}$$.
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