1
NEET 2013
MCQ (Single Correct Answer)
+4
-1
Change Language
Which of the following lanthanoid ions is diamagnetic?
(At. nos. Ce = 58, Sm = 62, Eu = 63, Yb = 70)
A
Eu2+
B
Yb2+
C
Ce2+
D
Sm2+
2
NEET 2013
MCQ (Single Correct Answer)
+4
-1
Change Language
Which of the following statements about the interstitial compounds is incorrect?
A
They are much harder than the pure metal.
B
They have higher melting points than the pure metal.
C
The retain metallic conductivity.
D
They are chemically reactive.
3
AIPMT 2012 Mains
MCQ (Single Correct Answer)
+4
-1
Change Language
Which of the following exhibits only + 3 oxidation state?
A
U
B
Th
C
Ac
D
Pa
4
AIPMT 2012 Mains
MCQ (Single Correct Answer)
+4
-1
Change Language
The catalytic activity of transition metals and their compounds is ascribed mainly to
A
their magnetic behaviour
B
their unfilled $$d$$-orbitals
C
their ability to adopt variable oxidation states
D
their chemical reactivity
NEET Subjects
EXAM MAP