1
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.
2
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
3
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
4
AIPMT 2012 Mains
MCQ (Single Correct Answer)
+4
-1
Change Language
Four successive members of the first series of the transition metals are listed below. For which one of them the standard potential $$\left( {E_{{M^{2 + }}/M}^o} \right)$$ value has a positive sign?
A
Co (Z = 27)
B
Ni (Z = 28)
C
Cu (Z = 29)
D
Fe (Z = 26)
NEET Subjects
EXAM MAP