Redox Reaction NEET Questions. We covered all the Redox Reaction NEET Questions in this post for free so that you can practice well for the exam.
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MCQ on Redox Reaction for NEET Students
The atomic number of an element is 31. Which of the following statements is INCORRECT with respect to this element?
(A) It has one electron in its 4p orbital.
(B) It is metal.
(C) It is a d-block element.
(D) It belongs to period 4.
Option c – It is a d-block element.
Suppose elements X and Y combine to form two compounds, XY2 and X3Y2. When 0.1 mole of XY2 weighs 10 g and 0.05 mole of X3Y2 weighs 9 g, the atomic weights of X and Y are respectively ………
(A) 30, 20
(B) 40,30
(C) 60,40
(D) 20,30
Option b – 40,30
For which of the following orbitals the number of spherical nodes is NOT equal to zero?
(A) 4f
(B) 3d
(C) 3s
(D) 2p
Option c – 3s
Consider proton and electron, both moving with equal velocity. The wavelength ratio of the proton to the electron is ……..
(A) 1 : 2
(B) 2 : 1
(C) 1836 : 1
(D) 1 : 1836
Option d – 1 : 1836
The amount of arsenic pentasulphide (As2S5) that can be obtained when 35.5 g of arsenic acid (H3ASO4) is treated with excess H₂S in the presence of conc. HCI (assuming 100% conversion) is ……….. (Atomic mass of As = 75, S = 32, 0 = 16)
(A) 0.25 mol
(B) 0.50 mol
(C) 0.125 mol
(D) 0.333 mol
Option c – 0.125 mol
Which of the following periodic property increases down the group with an increase in atomic number?
(A) Ionization enthalpy
(B) Non-metallic character
(C) Metallic character
(D) Valence
Option c – Metallic character
When the frequency of incident light is doubled, the kinetic energy of an emitted photon from a metal surface will be ……….
(A) doubled
(B) halved
(C) remain unaffected
(D) more than doubled
Option d – more than doubled
The ratio of wavelengths of electrons in two Bohr’s orbits is 2 : 3. The ratio of their kinetic energy is ……….
(A) 9 : 4
(B) 4 : 9
(C) 2 : 3
(D) 3 : 2
Option a – 9 : 4
In the photoelectric effect for a particular metal, the square of the velocity of the ejected electron is directly proportional to ……..
(A) the intensity of the incident beam
(B) the frequency of the incident beam
(C) the wavelength of the incident beam
(D) none of these
Option b – the frequency of the incident beam
Which of the following metals requires radiation of the highest frequency to cause the emission of electrons?
(A) Na
(B) Mg
(C) K
(D) Ca
Option b – Mg
The quantum numbers for electrons are given as, i. n = 4,7 = 1 ii. n = 4,1 = 0 iii. n = 3,1 = 2 iv. n = 3,1 = 1 The CORRECT order of increasing energy is ……….
(A) iii<i<iv<ii
(B) iv<ii <iii <i
(C) iv <iii<ji<i
(D) ii <iv<i<iii
Option b – iv
The ionization energy of a single electron species is 217.6 eV. The number of protons in the species is ……….
(A) 3
(B) 4
(C) 5
(D) 16
Option b – 4
For which of the following element, the value of the principal quantum number (n) for the valence shell is 5?
(A) Si (Z = 14)
(B) S (Z=16)
(C) Cs (Z = 55)
(D) Sr (Z = 38)
Option d – Sr (Z = 38)
The average vapor density of a mixture of NO₂ and N₂O4 is 38.3 at 300 K. The number of moles of NO₂ in 100 g of the mixture is ……….
(A) 0.218
(B) 0.437
(C) 1.736
(D) 0.868
Option b – 0.437
If the energy of an electron of a hydrogen atom in the second Bohr’s orbit is -3.4 eV. What will be the energy of an electron in the fourth Bohr’s orbit?
(A) -0.85 eV
(B) -13.6 eV
(C) -6.8 eV
(D) -54.4 eV
Option a – -0.85 eV
In a hydrogen atom, the energy emitted by an electron when it jumps from n = 2 to n = 1 is ……… the energy emitted when it jumps from 3 to n = 2.
(A) 0.18 times
(B) 5.4 times
(C) equal to
(D) twice
Option b – 5.4 times
In the reaction, 4NH3(g) +502(g) → 4NO(g) + 6H₂0 when 1 mole of ammonia and 1 mole of O₂ are made to react to completion, then it will lead to ……..
(A) consumption of all the oxygen
(B) formation of 1.0 mole of NO
(C) formation of 1.0 mole of H₂O
(D) consumption of all ammonia
Option a – consumption of all the oxygen
The empirical formula of an organic compound containing only carbon and hydrogen is CH₂. Under identical conditions of temperature and pressure, the mass of one liter of this organic gas is exactly equal to that of one liter of N₂. Therefore, the molecular formula of the organic gas will be ……..
(A) C₂H4
(B) C3H6
(C) C6H12
(D) C4H8
Option a – C₂H4
Which of the following particles will have the longest wavelength if the velocity of all the given particles is equal?
(A) Electron
(B) Proton
(C) Neutron
(D) Alpha particle
Option a – Electron
A 5.82 g silver coin is dissolved in nitric acid. When sodium chloride is added to the solution, all the silver is precipitated as AgCl. The AgCl precipitate weighs 7.20 g. The mass percentage of silver in the coin is ……….
(A) 60.3%
(B) 80.4%
(C) 93.1%
(D) 70%
Option c – 93.1%
The INCORRECT statement is ………. ( Redox Reaction NEET Questions )
(A) Each element has a unique line emission spectrum.
(B) The Paschen series of lines in the hydrogen spectrum appear in the visible region of the electromagnetic spectrum.
(C) Bohr’s theory could not explain the splitting of spectral lines in the presence of the magnetic or electric field.
(D) The emission spectra of atoms in the gas phase show bright lines of specific wavelengths with dark spaces between them.
Option b – The Paschen series of lines in the hydrogen spectrum appear in the visible region of the electromagnetic spectrum.
25 cm³ of oxalic acid completely neutralizes 0.064 g of sodium hydroxide. The molarity of an oxalic acid solution is ………
(A) 0.064 M
(B) 0.045 M
(C) 0.015 M
(D) 0.032 M
Option d – 0.032 M
Which of the following gases will occupy the least volume if 20 g of each gas is taken at the same temperature and pressure?
(A) CO₂
(B) N₂
(C) CH4
(D) HCl
Option a – CO₂
30 mL of a gaseous hydrocarbon requires 90 mL oxygen for complete combustion at STP. In of process, 60 mL of CO₂ is formed. The molecular formula of the hydrocarbon is ……..
(A) CH₂
(B) C₂H₂
(C) C₂H4
(D) C₂H6
Option c – C₂H4
3 g of activated charcoal was added to 50 mL of an acetic acid solution of strength 0.06 M, in a flask. After an hour, the solution was filtered and the strength of the filtrate was found to be 0.042 M. The amount of acetic acid adsorbed per gram of charcoal is ………..
(A) 18 mg
(B) 36 mg
(C) 42 mg
(D) 54 mg
Option a – 18 mg
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