1
JEE Main 2019 (Online) 9th January Morning Slot
+4
-1
The highest value of the calculated spin- only magnetic moment (in BM) among all the transition metal complexes is :
A
5.92
B
6.93
C
3.87
D
4.90
2
JEE Main 2019 (Online) 9th January Morning Slot
+4
-1
For emission line of atomic hydrogen from ni = 8 to nf = n, the plot of wave number $$\left( {\overline v } \right)$$ against $$\left( {{1 \over {{n^2}}}} \right)$$ will be (The Rydberg constant, RH is in wave number unit)
A
Linear with intercept $$-$$RH
B
Non linear
C
Linear with slope RH
D
Linear with slope $$-$$RH
3
JEE Main 2018 (Online) 16th April Morning Slot
+4
-1
Which of the following statements is false ?
A
Photon has momentum as well as wavelength.
B
Splitting of spectral lines in electrical field is called Stark effect.
C
Rydberg constant has unit of energy.
D
Frequency of emitted radiation from a black body goes from a lower wavelength to higher wavelength as the temperature increases.
4
JEE Main 2018 (Online) 15th April Evening Slot
+4
-1
The de-Broglie's wavelength of electron present in first Bohr orbit of 'H' atom is :
A
0.529 $$\mathop {\rm A}\limits^ \circ$$
B
2$$\pi$$ $$\times$$ 0.529 $$\mathop {\rm A}\limits^ \circ$$
C
$${{0.529} \over {2\pi }}$$ $$\mathop {\rm A}\limits^ \circ$$
D
4 $$\times$$ 0.529 $$\mathop {\rm A}\limits^ \circ$$
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