NEET Questions - Physics - Atoms and Nucleus

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In each of the following question match column -I and column -II select correct Answer. (a) Bohr atom model (b) Ionisation potential (c) Rutherford atom modal (d) Thomson atom modal charge are distrited uniformely. (p) fixed for the atom (q) Nucleus (r) stationary orbits (s) In atom positive and negative

a-->s , b-->r , c -->q , d-->p
a-->r , b-->p , c -->q , d-->s
a -->p , b-->r , c -->s , d-->q
b-->p , c -->q , b-->r , d-->s

The diagram shows the energy levels for an electron in a certain atom. Which transition shown represents the emission of a photon with the most energy?

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IV

Each of the following question contain two statements.choose correct answer form the given below. statement-I:- Large angle scattering of alpha Particle led to discovery of atomic nucleus. statement-II :- Entire Positive charge of atom is concentrated in the central core.

statement -I and II are true. and statement II is correct explanation of statement-I
statement -I and II are true, but statement-II is not correct explanation of statement I
statement I is true, but statement II is false.
statement I is false but statement II is true

Each of the following question contain two statements.choose correct answer form the given below. statement-I:- Nuclei of different atoms have same size statement- I I :- $R =Ro(A)^{1/3}$

Energy leVels A , B , C of a certain atom corresponding values of energy i.e$E_A$<$E_B$<$E_C$ . If $\lambda_1$,$\lambda_2$,$\lambda_3$ are wave lengths of radition corresponding to the transition C-->B , B-->A and C-->A. which of the following is correct

$\lambda_3^2 = \lambda_3^2 +\lambda_3^2$
$\lambda_3 = \lambda_1 + \lambda_2$
$\lambda_3={ \lambda_1\lambda_2 \over\lambda_1+\lambda_2}$
$\lambda_1+\lambda_2+\lambda_3= 0$

According to Bohr's theory the radius of electron in an orbit described by Principal quantum number n and atomic number Z, is Proportional to.

$Z^2n^2$
$ { n^2\over z } $
${ Z^2\over n }$
$ {n^2\over Z^2 } $

The energy of electron in the nth orbit of hydogen atom is expressed as $E_n ={ - 13.6\over n^2} eV$ . The shortest and longest wave length of lyman series will be.

$ 910A ^\circ , 1213A ^\circ $
$ 1315 A ^\circ ,1530 A ^\circ $
$ 5463 A ^ \circ , 7858 A ^ \circ $
None of these

Number of spectral lines in hydrogen atom is.

6
8
15
Infinity

In the nuclear reaction $X (\eta ,\alpha)_3^7 $ Li the atom X will be

$ _2{He}^2$
$ _5{B}^11$
$ _5{B}^10$
$ _5{B}^9$

A nucleus of $_{84}^{210}{Po}$ originally at rest emits $\alpha$-particle with speed v what will be the recoil speed of the daughter nucleus

$ v\over214$
$ 4v\over214$
$ 4v\over206$
$ v\over206$

It the radius of a nucleus of mass number 3 is R. then the radius of a nucleus of mass number 81 is

27R
9R
3R
$ (27)^{1\over 2} R$

The nucleus of which of following Pairs of nuclei are isotones

$_{34}{Se}^{74}$ , $ _{31}{He}^{71}$
$_{42}{Mo}^{92}$, $ _{40}{Zr}^{92}$
$_{38}{Sr}^{81}$, $_{38}{Sr}^{86}$
$_{20}{Cd}^{40}$, $_{16}{S}^{32}$

The control rod in a nuclear reactor is made of

uranium
Cadmium
plutomium
graphite

which of the following isotopes normally fissonable

$_{92}{U}^{233}$
$_{92}{U}^{238}$
$_{92}{U}^{235}$
$_{93}{Np}^{239}$

which of the following statement is true

$ _{78}Pt^{192} has 78 neutrons $
$ _{90}Th^{234} --> _{91}Pa^{234}+ _{2}He^{4}$
$ _{92}U^{238} --> _{90}Th^{234}+ _{2}He^{4}$
$ _{84}Po^{214} --> _{82}Pb^{210}+\beta ^ {-}$

NEET Physics Questions: Atoms and Nucleus