- Remaining Timing :-
(1). Superconductros are derived from compounds of
- (a). p-Block elements
- (b). lanthanides
- (c). actinides
- (d). transition elements
- (e). None of these
Answer : transition elements
Explanation:
(2). Which of the following oxidation states is the most common among the lanthanoids ?
- (a). 4
- (b). 2
- (c). 5
- (d). 3
- (e). None of these
Answer : 3
Explanation:
(3). The catalytic activity of transition metals and their compounds is ascribed mainly to
- (a). their magnetic behavior
- (b). their unfilled d-orpitals
- (c). their ability to adopt variable oxidation states
- (d). their chemical reactivity
- (e). None of these
Answer : their ability to adopt variable oxidation states
Explanation:
(4). Reason of lanthanoid contraction is
- (a). negligible screening effect of ‘f ’-orbitals
- (b). increasing nuclear charge
- (c). decreasing nuclear charge
- (d). decreasing screening effect
- (e). None of these
Answer : negligible screening effect of ‘f ’-orbitals
Explanation:
(5). Which one of the following ions is coloured ?
- (a). 1
- (b). 2
- (c). 3
- (d). 4
- (e). None of these
Answer : 4
Explanation:
(6). 
- (a). 1
- (b). 2
- (c). 3
- (d). 4
- (e). None of these
Answer : 1
Explanation:
(7). 
- (a). 0
- (b). 2
- (c). 4
- (d). 8
- (e). None of these
Answer : 2
Explanation:
(8). 
- (a). 1
- (b). 2
- (c). 3
- (d). 4
- (e). None of these
Answer : 4
Explanation:
(9). Which one of the following does not correctly represent the correct order of the property indicated against it ?
- (a). 1
- (b). 2
- (c). 3
- (d). 4
- (e). None of these
Answer : 3
Explanation:
(10). Magnetic moment 2.83 BM is given by which of the following ions ? (At.nos. Ti = 22, Cr = 24, Mn = 25, Ni = 28)
- (a). 1
- (b). 2
- (c). 3
- (d). 4
- (e). None of these
Answer : 2
Explanation:
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