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The sulphate of a metal M contains 9.87% of M. This sulphate is isomorphous with ZnSO4.7H2O. The atomic weight of M isb
Anonymous Quiz
17%
6.3
28%
12.3
37%
18.3
18%
24.3
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The sulphate of a metal M contains 9.87% of M. This sulphate is isomorphous with ZnSO4.7H2O. The atomic weight of M is
Anonymous Quiz
16%
6.3
30%
12.3
38%
18.3
16%
24.3
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A gas absorbs a photon of 355 nm and emits at two wavelengths. If one of the emissions is at 680 nm, the other is at:
Anonymous Quiz
24%
543mm
38%
643mm
32%
743mm
6%
None
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Which of the following element has least number of electrons in its M-shell?
Anonymous Quiz
34%
K
26%
Mn
28%
Si
11%
None
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In the ground state, an element has 13 electrons in its M-shell. The element is_____.
Anonymous Quiz
20%
Copper
54%
Chromium
15%
Nickel
11%
Iron
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The displacement in metres of a body varies with time t in second as y = t2 β t β 2. The displacement is zero for a positive of t equal to
Anonymous Quiz
20%
1s
39%
2s
29%
3s
12%
4s
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A boy starts from a point A, travels to a point B at a distance of 3 km from A and returns to A. If he takes two hours to do so, his speed is
Anonymous Quiz
4%
1km/h
34%
1.5 km/h
26%
2.5km/h
35%
3 km/h
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In the ground state, an element has 13 electrons in its M-shell. The element is_____.
Anonymous Quiz
19%
Copper
49%
Chromium
24%
Nickel
7%
Iron
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Consider the ground state of Cr atom (Z = 24). The numbers of electrons with the azimuthal quantum numbers, l = 1 and 2 are, respectively:
Anonymous Quiz
30%
12 and 4
43%
12 and 5
21%
9 and 4
5%
9 and 5
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The number of nodal planes present in s Γ s antibonding orbitals is
Anonymous Quiz
18%
1
44%
2
31%
0
7%
3
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Shubham Jha - Class 9
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