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1
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 $$MC{l_4}$$.
2
AIEEE 2005
MCQ (Single Correct Answer)
+4
-1
Which of the following factors may be regarded as the main cause of lanthanide contraction?
A
Poor shielding of one of 4f electron by another in the subshell
B
Effective shielding of one of 4f electrons by another in the subshell
C
Poorer shielding of 5d electrons by 4f electrons
D
Greater shielding of 5d electrons by 4f electrons
3
AIEEE 2005
MCQ (Single Correct Answer)
+4
-1
The lanthanide contraction is responsible for the fact that :
A
Zr and Y have about the same radius
B
Zr and Nb have similar oxidation state
C
Zr and Hf have about the same radius
D
Zr and Zn have the same oxidation
4
AIEEE 2005
MCQ (Single Correct Answer)
+4
-1
The oxidation state of chromium in the final product formed the reaction between $$K{\rm I}$$ and acidified potassium dichromate solution is :
A
$$+3$$
B
$$+2$$
C
$$+6$$
D
$$+4$$
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