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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
An element has the atomic number 31. Which of the following statements about this element is incorrect?
(A) It contains one electron in the 4p orbital.
(B) It is a metallic element.
(C) It is categorized as a d-block element.
(D) It is placed in the 4th period.
Option c – It is categorized as a d-block element.
Elements X and Y combine to form two compounds, XY₂ and X₃Y₂. If 0.1 mole of XY₂ weighs 10 g and 0.05 mole of X₃Y₂ weighs 9 g, the atomic masses of X and Y respectively are:
(A) 30, 20
(B) 40, 30
(C) 60, 40
(D) 20, 30
Option b – 40, 30
Which of the following orbitals has a non-zero number of spherical nodes?
(A) 4f
(B) 3d
(C) 3s
(D) 2p
Option c – 3s
A proton and an electron are both moving with the same velocity. The ratio of their de Broglie wavelengths is:
(A) 1 : 2
(B) 2 : 1
(C) 1836 : 1
(D) 1 : 1836
Option d – 1 : 1836
What amount of As₂S₅ can be produced when 35.5 g of H₃ASO₄ reacts completely with excess H₂S in the presence of concentrated HCl?
(Atomic masses: As = 75, S = 32, O = 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 properties increases as we move down a group?
(A) Ionization enthalpy
(B) Non-metallic character
(C) Metallic character
(D) Valency
Option c – Metallic character
What happens to the kinetic energy of emitted photoelectrons when the frequency of incident Light is doubled?
(A) It doubles
(B) It becomes half
(C) It stays unchanged
(D) It increases by more than twice
Option d – It increases by more than twice
The wavelengths of electrons in two Bohr orbits are in a 2 : 3 ratio. What is the ratio of their kinetic energies?
(A) 9 : 4
(B) 4 : 9
(C) 2 : 3
(D) 3 : 2
Option a – 9 : 4
In the photoelectric effect, for a specific metal, the square of the ejected electron’s velocity is directly related to:
(A) The intensity of the incoming Light
(B) The frequency of the incoming Light
(C) The wavelength of the incoming Light
(D) None of the above
Option b – The frequency of the incoming Light
Which metal needs the highest frequency radiation to eject electrons?
(A) Na
(B) Mg
(C) K
(D) Ca
Option b – Mg
The quantum numbers for electrons are given as:
i. n = 4, l = 1
ii. n = 4, l = 0
iii. n = 3, l = 2
iv. n = 3, l = 1
Choose the correct order of increasing energy:
(A) iii < i < iv < ii
(B) iv < ii < iii < i
(C) iv < iii < i < ii
(D) ii < iv < i < iii
Option b – iv < ii < iii < i
A single-electron species has an ionization energy of 217.6 eV. How many protons does it contain?
(A) 3
(B) 4
(C) 5
(D) 16
Option b – 4
For which of the following elements is the principal quantum number (n) for the valence shell equal to 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 at 300 K is 38.3. How many moles of NO₂ are present in 100 g of this mixture?
(A) 0.218
(B) 0.437
(C) 1.736
(D) 0.868
Option b – 0.437
If the energy of an electron in the second Bohr orbit of hydrogen is -3.4 eV, what is the energy in the fourth orbit?
(A) -0.85 eV
(B) -13.6 eV
(C) -6.8 eV
(D) -54.4 eV
Option a – -0.85 eV
In hydrogen Atom transitions, the energy released when an electron falls from n = 2 to n = 1 is ……… times that released in a transition from n = 3 to n = 2.
(A) 0.18 times
(B) 5.4 times
(C) Equal
(D) Twice
Option b – 5.4 times
In the reaction: 4NH₃(g) + 5O₂(g) → 4NO(g) + 6H₂O(g),
If 1 mole of NH₃ reacts with 1 mole of O₂ completely, what will be the outcome?
(A) All oxygen is used up
(B) 1.0 mole of NO is formed
(C) 1.0 mole of H₂O is produced
(D) All ammonia is consumed
Option a – All oxygen is used up
An Organic compound containing only hydrogen and carbon has the empirical formula CH₂. If 1 liter of this gas weighs the same as 1 liter of N₂ under identical conditions, what is its Molecular formula?
(A) C₂H₄
(B) C₃H₆
(C) C₆H₁₂
(D) C₄H₈
Option a – C₂H₄
If different particles are moving at the same speed, which one will have the longest de Broglie wavelength?
(A) Electron
(B) Proton
(C) Neutron
(D) Alpha particle
Option a – Electron
A 5.82 g silver coin is dissolved in nitric Acid. On adding sodium chloride, all the silver precipitates as AgCl weighing 7.20 g. What is the percentage of silver in the coin?
(A) 60.3%
(B) 80.4%
(C) 93.1%
(D) 70%
Option c – 93.1%
Identify the incorrect statement regarding atomic spectra and theories:
(A) Each element displays a unique line emission Spectrum.
(B) Paschen series of hydrogen appears in the visible Light Spectrum.
(C) Bohr’s theory couldn’t explain spectral line splitting in electric/magnetic fields.
(D) Gaseous atomic emission spectra consist of bright lines separated by dark spaces.
25 mL of oxalic Acid completely reacts with 0.064 g of NaOH. What is the molarity of the oxalic Acid solution?
(A) 0.064 M
(B) 0.045 M
(C) 0.015 M
(D) 0.032 M
Option d – 0.032 M
If 20 g of each of the following gases are taken at the same temperature and pressure, which will occupy the smallest volume?
(A) CO₂
(B) N₂
(C) CH₄
(D) HCl
Option a – CO₂
When 30 mL of a hydrocarbon gas is completely combusted with 90 mL of oxygen at STP, and 60 mL of CO₂ is produced, what is the Molecular formula of the hydrocarbon?
(A) CH₂
(B) C₂H₂
(C) C₂H₄
(D) C₂H₆
Option c – C₂H₄
3 g of activated charcoal is added to 50 mL of a 0.06 M acetic Acid solution. After an hour, the concentration drops to 0.042 M. What is the amount of acetic Acid adsorbed per gram of charcoal?
(A) 18 mg
(B) 36 mg
(C) 42 mg
(D) 54 mg
Option a – 18 mg
We covered all the redox reaction NEET Questions above in this post for free so that you can practice well for the exam.
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