Structure of Atom NEET Questions. We covered all the Structure of Atom NEET Questions in this post for free so that you can practice well for the exam.
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MCQ on Structure of Atom for NEET Students
Which formula gives the maximum number of electrons in a shell?
(a) n²
(b) 2n²
(c) 3n²
(d) 4n²
Option b – 2n²
Which one of the following is not needed in a nuclear fission reactor?
(a) Moderator
(b) Coolant
(c) Accelerator
(d) Control device
Option c – Accelerator
In which one of the following is the valence electronic configuration, ns²np³ found?
(a) Carbon
(b) Oxygen
(c) Nitrogen
(d) Argon
Option c – Nitrogen
Which one among the following statements about an atom is not correct?
(a) Atoms always combine to form molecules
(b) Atoms are the basic units from which molecules and ions are formed
(c) Atoms are always neutral in nature
(d) Atoms aggregate in large numbers to form the matter that we can see, feel and touch
Option d – Atoms aggregate in large numbers to form the matter that we can see, feel and touch
Which of the following pairs is/are correctly matched? 1. Isotopes: Atoms with the same atomic number but different atomic mass 2. Isobars: Atoms with the same number of neutrons but different atomic numbers 3. Isotones: Atoms with the same mass number but different atomic numbers Select the correct answer using the code given below: Code :
(a) 1, 2 and 3
(b) 1 only
(c) 1 and 2 only
(d) 2 only
Option b – 1 only
An oxide of nitrogen has a molecular weight of 30. What is the number of electrons in one molecule of the compound?
(a) 14
(b) 15
(c) 22
(d) 23
Option b – 15
The nucleus of a singly ionized carbon atom contains
(a) 6 protons and 6 neutrons
(b) 5 protons and 6 neutrons
(c) 6 protons, 6 neutrons and 6 electrons
(d) 12 protons, 6 neutrons and 6 electrons
Option a – 6 protons and 6 neutrons
Protons and neutrons are bound in a nucleus by the
(a) short-range ‘weak interaction’
(b) short-range ‘strong interaction’
(c) long-range ‘electromagnetic interaction’
(d) long-range ‘gravitational interaction”
Option b – short-range ‘strong interaction’
Which one among the following most correctly determines the atomic number of an element?
(a) Number of protons
(b) Number of protons and electrons
(c) Number of ions
(d) Number of nucleons
Option a – Number of protons
The number of protons in a negatively charged atom (anion) is
(a) more than the atomic number of the element
(b) less than the atomic number of the element
(c) more than the number of electrons in the atom
(d) less than the number of electrons in the atom
Option d – less than the number of electrons in the atom
What is the formula mass of anhydrous sodium carbonate? (Given that the atomic masses of sodium, carbon, and oxygen are 23 u, 12 u, and 16 u respectively)
(a) 286 u
(b) 106 u
(c) 83 u
(d) 53 u
Option c – 83 u
Which one of the following statements about the law of conservation of mass is correct?
(a) A given compound always contains exactly the same proportion of elements.
(b) When gases combine in a reaction, they do so in a simple ratio by volume, provided all gases are at room temperature.
(c) Matter can neither be created nor destroyed.
(d) Equal volumes of all gases at the same temperature and pressure contain equal numbers of molecules.
Option c – Matter can neither be created nor destroyed
Which of the following elements does not contain neutrons?
(a) Oxygen
(b) Nitrogen
(c) Hydrogen
(d) Copper
Option c – Hydrogen
The number of electrons and neutrons in an element is 18 and 20 respectively. Its mass number is
(a) 22
(b) 2
(c) 38
(d) 20
Option c – 38
Which one among the following is used as a moderator in nuclear reactors?
(a) Ozone
(b) Heavy hydrogen
(c) Heavy water
(d) Hydrogen peroxide
Option c – Heavy water
The age of fossils may be found by determining the ratio of two isotopes of carbon. The isotopes are
(a) C-12 and C-13
(b) C-13 and C-14
(c) C-12 and C-14
(d) C-12 and carbon black
Option c – C-12 and C-14
Which of the following radioactive substances enters/ enter the human body through the food chain and causes/ cause many physiological disorders?
(a) Strontium-90
(b) Iodine-131
(c) Cesium-137
(d) All of the above
Option d – All of the above
Rutherford’s alpha-particle scattering experiment was responsible for the discovery of
(a) Electron
(b) Proton
(c) Nucleus
(d) Helium
Option c – Nucleus
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