ECAT Pre Engineering Chemistry Chapter 5 MCQ Test With Answer

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ECAT Chemistry Chapter 5 Important MCQ's

Sr.#	Question	Answer
1	Positive particle in discharged tube is produced by ionization of gas molecules, which is caused by	A. Gas molecules collide with anode B. Gas molecules are at high temperature C. Gas molecules produce X-rays D. Cathode rays remove electrons from gas molecules
2	For which of the following sets of quantum numbers and electron will have the highest energy?	A. 3,2,1,1/2 B. 4,2,-1,1/2 C. 4,1,0,-1/2 D. 5,0,0,1/2
3	The wave number of light emitted by a certain source is 2 x 10⁵m. The wavelength of this light will be:	A. 500 NM. B. 500 M. C. 200 NM. D. 5 x 10⁷m
4	The radius of first orbit of H-atom is	A. 4.75 A° B. 3.84 A° C. 8.4 A° D. 0.529 A°
5	The energy of ionization of an atom is the energy difference between orbital
6	1 erg of energy corresponds to	A. 6.02 x 10²³J/mol B. 6.02 x 10¹⁶J/mol C. 1 erg/mol D. 10^-7J/mol
7	An electron with n = 3 , l = 2 will be in the sub-shell	A. 3p B. 3d C. 3f D. 3s
8		A. Plank's equations B. de Broglie's equations C. Heisenburg's equation D. None
9	n + l value for 4f will	A. 2 B. 5 C. 7 D. 9
10	The wave number of the light emitted by a certain source is 2 x 10⁶m^-1. The wavelength of this light will be	A. 500 nm B. 500 m C. 200 nm D. 5 x 10⁷m

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ECAT Pre Engineering Chemistry Chapter 5 MCQ Test With Answer

MCQ's Test For ECAT Chemistry Chapter 5 Atomic Structure

ECAT Chemistry Chapter 5 Atomic Structure

When the electron jumps form second third, fourth orbit to the fist orbit, the transitions are known as

The mass of the neutron is of the order of

The quantum number which describe the orientation of the orbitals is

When 3p orbital is complete, the entering electron goes into

When electron jumps from n2= 2,3,4,5,.... orbit to n1= 1 orbit in the hydrogen atom, the radiations emitted give the spectral lines

The rules which describe the distribution of electron in atomic energy levels are Auf-ban principle, Pauli's exclusion principle. Hunds rule. The pauli exclusion principle refers to the

When electrons revolve in stationary orbits

The third line of the Balmer series, in the emission spectrum of the hydrogen atom,is due to the transition from the

Charge on electron was discovered by:

The wave number of the light emitted by a certain source is 2 x 106m-1. The wavelength of this light will be

An electron has principal quantum number 3. The number of its 1 subshell and 2 orbitals would be respectively

Azimuthal quantum number of last electron of 11Na is

The electron in an atom

Effective magnetic moment of Sc3+ion is

The number of electrons in the M shell of the element with atomic number 24 is

Orbital having same energy is called:

Which one of the following particles has amass 1/1836 time, that of hydrogen?

The size of electronic shell is described by

In Bohr model of hydrogen atom the distance between adjacent orbits increases away from the nucleus, the energy difference between the orbits

The divisibility of atom was shown by

When 6s orbital is complete then next electron goes to

The configuration 1s22s22p53s1shows

The wave number of the line emitted is 109.678 x 105m-1in the Lyman series when electron transition occurs

When cathode rays strike the anode metal X-rays are emitted and not the positive rays because

Proton was discovered by:

Which is not true with respect to cathode rays?

The degenerate orbitals p-sub shell are

Neutrons was discovered by

The orbitals having n + l = 5 are

The atomic number of an element is 35 what is the total number of electrons present in all the p-orbitals of the ground state atom of that element?

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ECAT Chemistry Chapter 5 Important MCQ's

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When electron jumps from n₂= 2,3,4,5,.... orbit to n₁= 1 orbit in the hydrogen atom, the radiations emitted give the spectral lines

The wave number of the light emitted by a certain source is 2 x 10⁶m^-1. The wavelength of this light will be

Azimuthal quantum number of last electron of ₁₁Na is

Effective magnetic moment of Sc³⁺ion is

The configuration 1s²2s²2p⁵3s¹shows

The wave number of the line emitted is 109.678 x 10⁵m^-1in the Lyman series when electron transition occurs