ECAT Chemistry MCQ's Test For Full Book With Answers

ECAT Chemistry MCQ's Test For Full Book

Sr. # Questions Answers Choice
1 Tripple bond is present in O<sub>2</sub> H<sub>2</sub> N<sub>2</sub> Cl<sub>2</sub>
2 Coordinate covalent bond is present in the molecules H<sub>2</sub>O BF<sub>3</sub> SiO<sub>2</sub> SO<sub>2</sub>
3 The bond order O2molecule is 1 2 3 Zero
4 Which is made by coordinate covalent bond H<sub>3</sub>O<sup>+</sup> H<sub>2</sub>O CH<sub>4</sub> HCl
5 When the electron jumps form second third, fourth orbit to the fist orbit, the transitions are known as Balmer series Lyman series Pfund series Brackett series
6 When the electron jumps form third, fourth, fifth orbits to the second orbit, the transitions are known as Paschen Pfund Balmer Brackett
7 Photons of yellow colour are ______ energetic than violet colour More Less Equal None
8 The quantum number which describe the orientation of the orbitals is Spin quantum number Principle quantum number Azimathal quantum number Magnetic quantum number
9 The quantum number which describes the shape of the orbital is Principle quantum number Spin quantum number Azimathal quantum number Magnetic quantum number
10 Balmer's series is in ______ region Visible U V I. R. None
11 The range of visible spectrum is 300 - 600 nm 600 - 900 nm 400 - 750 nm 100 - 300 nm
12 n + l value for 4f will 2 5 7 9
13 Neutrons was discovered by Mosely Milliken Chadwick Ruherford
14 Charge to mass ratio (e/m) of the electron is determined by R. A. Millikan J. J. Thompson G. J, Stoney None of these
15 Cathode rays emitted from cathode are Canal rays Protons Electrons Positrons
16 The value of R (Rydberg's constant) is _______ m-1 1.0974 x 107 1.0842 x 107 1.082 x 10-7 Both a and b
17 Which of the atoms has 1s2, 2s2, 2px22p1y2p1zconfiguration Nitrogen Carbon Fluorine Oxygen
18 Electrons in degenerate orbitals are placed in separate orbitals with same spin according to Hund's rule Pauli exclusion principle Aufbau principle Mosley's law
19 An electron with n = 3 , l = 2 will be in the sub-shell 3p 3d 3f 3s
20 If the value of azimuthal quantum number is 3, then values of m the magnetic quantum no. will be 0, 1, 2, 3 +3, +2, +1, -1, -2, -3 0, -1, -2 ,-3 -3, 0, +3
21 The order of frequency of the following radiations unltraviolet, visible, infrared and microwave is Microwave &gt; infrared &gt; visible &gt; ultraviolet Visible &gt; ultraviolet &gt; microwave &gt; infrared Ultraviolet &gt; visible &gt; infrared &gt; microwave Infrared &gt; microwave &gt; ultraviolet &gt; visible
22 Which have better penetrating power Alpha rays Beta rays Gamma rays X-rays
23 The radiations with wavelength shorter than violet light are called Ultraviolet Infrared Microwave Radio frequency
24 Spectrum of white light is continuous becuase Colors separated by dark spaces There are no boundary lines between the colours The radiations are in infrared region The radiatins fall in ultraviolet region
25 The number of isotopes of gold is 3 1 2 4
26 Isotopes of an element differ in Number of protons Number of electrons Number of neutrons Number of electrons and protons
27 The phenomenon of isotropy was first discovered by Soddy Rutherford Bohr Dalton
28 The isotopes of an element Possess same mass number Possess same number of protons Do not possess same chemical properties May or may not possess same chemical properties
29 The negatively charged particles are called Cation Radical Anion Positron
30 Macromolecules are organic molecules High molecular mass molecules Natural compounds Rarely occurring molecules
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