New chat PYQ Library Doubts Rank report

Sign in to see Recents

Sign in to save progress →

Atoms and Nuclei question

2014 · Shift 0 · Q50

Guest · try one question or challengeGuest · try one question or challenge

PYQ Library
JEE Main
Physics
Atoms and Nuclei
2014 · Shift 0 · Q50

Atoms and Nuclei question

2014 · Shift 0 · Q50

JEE MainPhysicsAtoms and NucleiMCQ+4 / −1

Hydrogen

\left( {{}_1{H^1}} \right)

, Deuterium

\left( {{}_1{H^2}} \right)

, singly ionised Helium

{\left( {{}_2H{e^4}} \right)^ + }

and doubly ionised lithium

{\left( {{}_3L{i^6}} \right)^{ + + }}

all have one electron around the nucleus. Consider an electron transition from

n=2

to

n=1.

If the wavelengths of emitted radiation are

{\lambda _1},{\lambda _2},{\lambda _3}

and

{\lambda _4}

respectively then approximately which one of the following is correct?

A
$4{\lambda _1} = 2{\lambda _2} = 2{\lambda _3} = {\lambda _4}$
B
${\lambda _1} = 2{\lambda _2} = 2{\lambda _3} = {\lambda _4}$
C
${\lambda _1} = {\lambda _2} = 4{\lambda _3} = 9{\lambda _4}$
D
${\lambda _1} = 2{\lambda _2} = 3{\lambda _3} = 4{\lambda _4}$

More from Atoms and Nuclei

In a hydrogen like atom electron make transition from an energy level with quantum number $n$ to another with quantum number $(n - 1)$ . If $n >> 1,$ the frequency of radiation emitted is proportional to :2013 · MCQ
A diatomic molecule is made of two masses $m_{1}$ and $m_{2}$ which are separated by a distance $r .$ If we calculate its rotational energy by applying Bohr's rule of angular momentum quantization, its energy will be given by: ( $n$ is an…2012 · MCQ
Assume that a neutron breaks into a proton and an electron. The energy released during this process is : (mass of neutron $= 1.6725 \times 1 0^{- 27} k g,$ mass of proton $= 1.6725 \times 1 0^{- 27} k g,$ mass of electron $= 9 \times 1 0^{- 31} k g$ …2012 · MCQ
Hydrogen atom is excited from ground state to another state with principal quantum number equal to $4.$ Then the number of spectral lines in the emission spectra will be :2012 · MCQ
Energy required for the electron excitation in $L i^{++}$ from the first to the third Bohr orbit is :2011 · MCQ
A nucleus of mass $M + Δ m$ is at rest and decays into two daughter nuclei of equal mass $\frac{M}{2}$ each. Speed of light is $c .$ The speed of daughter nuclei is2010 · MCQ
A nucleus of mass $M + Δ m$ is at rest and decays into two daughter nuclei of equal mass $\frac{M}{2}$ each. Speed of light is $c .$ The binding energy per nucleon for the parent nucleus is $E_{1}$ and that for the daughter nuclei is $E_{2} .$ …2010 · MCQ
The above is a plot of binding energy per nucleon $E_{b},$ against the nuclear mass $M; A, B, C, D, E, F$ correspond to different nuclei. Consider four reactions : $(i) A + B \to C + ε (ii) C \to A + B + ε (iii) D + E \to F + ε (i v) F \to D + E + ε,$ … Includes diagram2009 · MCQ