Structure of Atom – Chemistry | NEET Online Mock test

The specific charge on an electron is

1.  5.27 C/kg
2.  5.27  e.s.u./g
3.  1.758 x 10¹¹ C/g
4.  5.27 x 10¹⁷ e.s.u./g

The energy of a photon having a wavelength of 0.5Å would be

1. 3.98 x 10-15 J
2. 5.75 x 10-16 J
3. 5.25 x 10-18 J
4. 9 x 10-16 J

Which one is correct regarding the photoelectric effect?

The energy of an electron in the 5th orbit of the H-atom is

According to Bohr's atomic theory, which of the following is correct?

1.  Time Period α n⁴/Z²
2. K.E. of e^- α Z²/n²
3. T.E. α Z/n
4.  Frequency of revolution α Z²/n⁴

The intensity of spectral lines depends upon

An electron in H-atom jumps from the nth orbit to the 3rd orbit. If three spectral lines are possible for the transition, the value of n is

Which of the following is correct?

Uncertainty in the position of an electron is 'x' m and uncertainty in its velocity is 5.72 x 10⁷ x m/s then the value of x will be

1. 1.012 x 10^-10
2. 1.012 x 10^-12
3. 2.052 x 10^-8
4. 3.012 x 10^-12

Correct relationship regarding de Broglie's hypothesis.

The correct set of 4 quantum numbers of a 4d electron is

How many exchanges are possible for the d electrons present in vanadium [atomic no. 23] atom?

Which of the following has a maximum number of unpaired electrons?

1. Ca
2. Cs^-
3. Fe²⁺
4. Zn²⁺

Which is correct regarding wavefunction for 2p-orbital and distance from the nucleus?

The energy of a photon is 2 x 10^-15 x J Its wavelength will be nearly equal to

1. 100Å
2. 10Å
3. 1Å
4. 1000Å

At low pressure there is enough space between gaseous atoms of He so that ions can accelerate to such a high speed that when they strike another atom it can eject electrons of it, creating more

A light of frequency 10¹⁶ Hz is irradiated on a metal surface with threshold frequency equal to 5 x 10¹⁵ Hz What would be the maximum kinetic energy of photoelectrons emitted?

1. 3.313 x 10^-15  J
2. 3.313 x 10^-18  J
3. 1.02 x 10¹⁶  J
4. 4.316 x 10^-18  J

An electron is moving in nth orbit of radius 2.3758Å in He⁺ ion. Energy required to remove electron from this orbit of He⁺ is

Which of the following is correct?

Maximum number of spectral lines possible if electron is present in 4th shell and only two atoms are present in sample would be

Splitting of a spectral line in presence of magnetic field is known as

How many electrons in Argon atom have m_l =1

How many electrons in sodium atom have m_l = 0?

Which one of the following sets is correct?

Possible ways of exchange for d⁵ is

This graph is for

The magnetic moment of an ion M³⁺ is 5.92BM. The number of electrons in the d-orbital of M will be

A metal surface in 2 experiments is irradiated by 2-radiations of frequencies v₁ and v₂. If v₁ = 2v₂ then what is the correct relationship between the work function of metal in both experiments?

1. hv₀₁ > hv₀₂
2. hv₀₁ < hv₀₂
3. hv₀₁ = hv₀₂
4. Both (1) & (2)

The wave number of a spectral line in the emission spectrum of Hydrogen will be equal to 8/9 times the Rydberg's constant if the electron jumps from

In an atom, an e^- is moving with a speed of 600 ms^- with an accuracy of 0.005%. Certainly with which the position of e^- can be located is

1. 1.52 x 10^-4 m
2. 5.10 x 10^-3 m
3. 1.92 x 10^-3 m
4. 3.84 x 10^-3 m

If de-Broglie λ of a particle of mass m is 100 times Its velocity, then the value of λ in terms of mass (m and h  is

Which of the following electronic configurations for ₂₆Fe is violating Hund's rule?

When the light of frequency 2×10¹⁶ Hz is irradiated on a metal surface with the work function of 57.514x10^-19J, what will be its kinetic energy?

1. 10^-16 J
2. 7.5×10^-18 J
3. 8.5×10^-18 J
4. 300×10^-5 J

Which of the following equations is in accordance with de Broglie's hypothesis?

For which orbital it could not be the Radial distribution function?

Magnetic moment of Fe³⁺ is

The number of spectral lines obtained in the visible region when electrons de-excite from the 4th shell to the ground shell of hydrogen are:

Which of the following set of quantum numbers has maximum energy?

If E_1, E_2, E₃ and E₄ are the energy of the first, second third and fourth orbit of the H-atom respectively, then. The correct order of energy difference is

1. E₃ - E₂ > E₄ - E₃ > E₂ - E₁ 
2. E₂ - E₁ > E₃ - E₂ > E₄ - E₃
3. E₄ - E₃ > E₃ - E₂ > E₂ - E₁
4. E₄ - E₃ > E₂ - E₁ > E₃ - E₂

Electrons are emitted from a metal surface with zero velocity when it is exposed to radiation of wavelength 6000 Å. The threshold frequency of metal is

1. 5 x 10^-19 s^-1
2. 5 x 10¹⁴ s^-1
3. 5 x 10¹⁵ s^-1
4. 5.84 x 10⁵ s^-1

The total number of exchanges possible in d-electrons of chromium (Atomic number = 24) is

If the wave number of the spectral line associated with a particular transition in the H-atom is X cm^-1, then what will be the wave number for the same transition in He⁺ and Li²⁺?

If the sample contains only 1H atom in the M shell on de-excitation to the ground state it can give maximum spectral lines

If r is the radius of first Bohr's orbit of He⁺, the radius of n^th Bohr's orbit of He⁺ will be

Which of the statements about quantum numbers is wrong?

Correct statement regarding uncertainty principle

Which of the following orbitals has two spherical nodes?

The maximum number of electrons, that can be present in a d-orbital is

The total number of orbitals in any shell is given by

1. n
2. n²
3. 2n²
4. 2l + 1

Which of the following quantities are quantized for an electron in an atom, according to Bohr's model