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Structure of Atom MCQ for NEET. We covered all the Structure of Atom MCQ for NEET 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
What is the chemical formula of barium phosphate?
(a) BaPO₄
(b) Ba₂(PO₄)₃
(c) Ba(PO₄)₃
(d) Ba₃(PO₄)₂
Option d – Ba₃(PO₄)₂
If a metal forms a chloride with the formula MCl₃, what would be the formula of its phosphate?
(a) M₂PO₄
(b) MPO₄
(c) M₂PO₄
(d) M(PO₄)₃
Option b – MPO₄
Which of these represents a binary compound containing hydrogen and oxygen?
(a) H₂O
(b) H₂O₂
(c) Both H₂O and H₂O₂
(d) None of the above
Option c – Both H₂O and H₂O₂
In a chemical reaction, the combined mass of the products is
(a) never equal to the mass of the reactants
(b) always less than the mass of the reactants
(c) always more than the mass of the reactants
(d) always equal to the mass of the reactants
Option d – always equal to the mass of the reactants
Who first conducted the cathode ray tube experiment?
(a) J.J. Thomson
(b) John Dalton
(c) Goldstein
(d) Rutherford
Option a – J.J. Thomson
What particles are found in the atomic nucleus?
(a) Only protons
(b) Only electrons
(c) Protons and neutrons
(d) Only neutrons
Option c – Protons and neutrons
Where are the valence electrons located in an atom?
(a) Outermost energy level
(b) Second-to-last shell
(c) Innermost shell
(d) Any orbital randomly
Option a – Outermost energy level
How many electrons can the third energy level (n = 3) hold at maximum?
(a) 2
(b) 8
(c) 18
(d) 10
Option c – 18
How do electrons behave inside an atom?
(a) They remain stationary
(b) They spread uniformly throughout
(c) They orbit the nucleus in fixed paths
(d) They revolve randomly around the nucleus
Option c – They orbit the nucleus in fixed paths
Ammonia from different sources always contains the same ratio of nitrogen to hydrogen. Which law does this support?
(a) Law of reciprocal proportions
(b) Law of constant proportions
(c) Law of multiple proportions
(d) None of the above
Option b – Law of constant proportions
What is the atomic nature of neon?
(a) Monoatomic
(b) Diatomic
(c) Triatomic
(d) Tetra atomic
Option a – Monoatomic
Which compound has an atomicity of 4?
(a) H₂O
(b) NH₃
(c) PCl₅
(d) CCl₄
Option b – NH₃
Which elements are found in both water and hydrogen peroxide?
(a) Hydride and oxide
(b) Hydrogen and oxide
(c) Hydride and oxygen
(d) Hydrogen and oxygen
Option d – Hydrogen and oxygen
What does Avogadro’s law state?
(a) Equal volumes of gases contain the same number of molecules under similar conditions
(b) Equal volumes of gases contain the same number of atoms
(c) Equal volumes have equal valency
(d) Equal volumes contain the same number of isotopes
Option a – Equal volumes of gases contain the same number of molecules under similar conditions
Combining one part nitrogen with three parts hydrogen results in
(a) One part ammonia
(b) Two parts ammonia
(c) Three parts ammonia
(d) One and a half parts ammonia
Option b – Two parts ammonia
Which of the following is an incorrect description of cathode rays?
(a) Travel in straight lines
(b) Their properties depend on the gas used in the discharge tube
(c) Cast shadows when obstructed
(d) Are attracted to positively charged plates
Option b – Their properties depend on the gas used in the discharge tube
What is true about isotopes?
(a) Have the same number of neutrons
(b) Share the same atomic number
(c) Have identical mass numbers
(d) None of the above
Option b – Share the same atomic number
Which statement is false regarding Bohr’s atomic model?
(a) The nucleus is located at the center of the atom
(b) Electrons move in circular paths
(c) Electrons can jump between energy levels
(d) Energy remains unchanged during electronic transitions between orbits
Option d – Energy remains unchanged during electronic transitions between orbits
An element has an atomic number of 11 and a mass number of 23. Which of the following is the correct electron-proton-neutron count?
(a) 11, 11, 12
(b) 11, 12, 11
(c) 12, 11, 11
(d) 23, 11, 23
Option a – 11, 11, 12
Which of these are considered isotopes?
(a) Oxygen and ozone
(b) Ice and steam
(c) Nitric oxide and nitrogen dioxide
(d) Hydrogen and deuterium
Option d – Hydrogen and deuterium
An atom with mass number 14 and a single neutron is an
(a) Isotope of oxygen
(b) Isobar of oxygen
(c) Isotope of carbon
(d) Isobar of carbon
Option c – Isotope of carbon
Which substance contains equal numbers of protons and neutrons?
(a) Hydrogen
(b) Deuterium
(c) Fluorine
(d) Chlorine
Option b – Deuterium
Why are the relative atomic masses of elements often not whole numbers?
(a) They are difficult to determine precisely
(b) Atoms ionize during mass measurement
(c) Due to the existence of isotopes
(d) Because of impurities in the element
Option c – Due to the existence of isotopes
How many valence electrons does aluminum have?
(a) 1
(b) 2
(c) 3
(d) 4
Option c – 3
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