1
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
2
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
$$+4$$
3
AIEEE 2005
MCQ (Single Correct Answer)
+4
-1
On heating mixture of $$C{u_2}O$$ and $$C{u_2}S$$ will give :
A
$$C{u_2}S{O_3}$$
B
$$CuO + CuS$$
C
$$Cu + S{O_3}$$
D
$$Cu + S{O_2}$$
4
AIEEE 2005
MCQ (Single Correct Answer)
+4
-1
Calomel $$\left( {H{g_2}C{l_2}} \right)$$ on reaction with ammonium hydroxide gives :
A
$$HgO$$
B
$$H{g_2}O$$
C
$$N{H_2} - Hg - Hg - Cl$$
D
$$HgN{H_2}Cl$$
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