AIEEE 2003 | Structure of Atom Question 216 | Chemistry

In Bohr series of lines of hydrogen spectrum, the third line from the red end corresponds to which one of the following inter-orbit jumps of the electron for Bohr orbits in an atom of hydrogen

5 $$\to$$ 2

4 $$\to$$ 1

2 $$\to$$ 5

3 $$\to$$ 2

AIEEE 2003

MCQ (Single Correct Answer)

-1

The orbital angular momentum for an electron revolving in an orbit is given by $$\sqrt {l(l + 1)} {h \over {2\pi }}$$. This momentum for an s-electron will be given by

zero

$${h \over {2\pi }}$$

$$\sqrt 2 {h \over {2\pi }}$$

$$ + {1 \over 2}{h \over {2\pi }}$$

AIEEE 2002

MCQ (Single Correct Answer)

-1

Uncertainty in position of a minute particle of mass 25 g in space is 10^-5 m. What is the uncertainty in its velocity (in ms^-1) (h = 6.6 $$\times$$ 10^-34 Js)

2.4 $$\times$$ 10^-34

0.5 $$\times$$ 10^-34

2.1 $$\times$$ 10^-28

0.5 $$\times$$ 10^-23

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