Q.1. Match the following
(1)Principal Quantum Number (a)Orientation of Orbital
(2)Azimuthal Quantum Number (b)Energy and Size of Orbital
(3)Magnetic Quantum Number (c)Shape of Orbital
(4)Spin Quantum Number (d)Spin of Electron
Q.2. Match the following
(1)Photon (a)Always Positive Value
(2)Electron (b)Exhibits both Momentum and Wavelength
(3)Phi raise to power 2 (c)Probability Density
(4)Principal Quantum Number (d)Value is 4 for N shell
Q.3 Match the following
(1)J. J. Thomson (a)Indivisibility of Atom
(2)Rutherford (b)Water Melon Model of Atom
(3)Dalton (c)Nucleus
(4)Niel's Bohr (d)Stationary Shell
Q.4. Match the following
(1)J. J. Tomson (a)1808
(2)Rutherford (b)1899
(3)Dalton (c)1911
(4)Niel's Bohr (d)1913
MCQ
Q.1. Which of the follwing conclusions could not be derived from Rutherford's Alpha particle scattering experiment
(a) Most of the space is empty.
(b) The radius of atom is about much larger than that of nucleus.
(c) Electron moves in circular path of fixed energy called orbit.
(d) Electron and nucleus are held together by electrostatic force of attraction.
Q.2. Which of the following statement about electron is incorrect
(a) It is negatively charged particle
(b) The mass of electron is equal to mass of neutron
(c) It is basic constituent of all atom.
(d) It is constituent of cathode rays.
Q.3. Which of the following properties of atom could be explained correctly by Thomson Model of atom?
(a) Overall neutrallity of atom
(b) Spectra of hydrogen atom
(c) Position of electron, proton and neutron in atom
(d) Stability of atom
Q.4. Which of the following statement is not correct about characteristic of cathode rays
(a) They start from cathode and move towards anode.
(b) They travel in straight line in absence of electrical or magnetic field
(c) Characteristic of cathode rays do not depend on material of electrode in cathode ray tube.
(d) Characteristic of cathode rays depends on the nature of gas present in cathode ray tube.
Q.5. Total number of orbital associated with 3rd shell will be
(a) 2
(b) 4
(c) 9
(d) 3
Q.6. Orbital angular momentum of electron depends on
(a) l
(b) n and l
(c) n and m
(d) m and s
Q.7. The indivisibility of matter was proposed by
(a) Rutherford
(b) Dalton
(c) Bohr
(d) Einstein
Q. 8. Which is not correct according to Dalton's atomic theory
(a) Atoms are indivisible
(b) All atoms of an element may not have same mass
(c) Atoms always combine in simple whole number ratio.
(d) Atoms of different element have different mass
Q. 9. The thin layer of which metal was used in Rutherford's Alpha particle experiment
(a) Aliminum
(b) Gold
(c) Silver
(d) Zinc
Q.10. In Rutherford's experiment most of Alpha particle were observed to
(a) Pass Undeflected
(b) Be Deflected
(c) Be thrown back
(d) Be absorbed
Q.11. Rutherfords experiment on scattering of Alpha particle showed for first time that atom has
(a) Electron
(b) Proton
(c) Nucleus
(d) Neutrons
Q.12. In gold foil scattering experiments most of the Alpha particles passes straight through the foil
(a) Alpha particles are much smaller than electron
(b) Alpha particles are positively charged
(c) Most part of atom has empty space
(d) Alpha particle move with low velocity
Q.13. Alpha particle scattering experiment helped in estimating the relative size of
(a) Nucleus
(b) Atom
(c) Electron
(d) Neutron
Answers Match the following:- Q.1. (1) (b) (2) (c) (3) (a) (4) (d)
Q.2. (1) (b) (2) (c) (3) (a) (4) (d)
Q.3. (1) (b) (2) (c) (3) (a) (4) (d)
Q.4. (1) (b) (2) (c) (3) (a) (4) (d)
Answers MCQ:- Q.1. (c) Q.2. (b) Q.3. (a) Q.4. (d) Q.5. (c) Q.6. (b) Q.7. (b) Q.8. (b) Q.9. (b) Q.10. (a)
Q.11. (c) Q.12. (c ) Q.13. (a)
