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
The formula of barium phosphate is
(a) BaPO4
(b) Ba₂(PO4)3
(c) Ba(PO4)3
(d) Ba3(PO4)2
Option d – Ba3(PO4)2
If the formula of chloride of metal is MCl3, the formula of metal phosphate is
(a) M₂PO4
(b) MPO4
(c) M₂PO4
(d) M(PO4)3
Option b – MPO4
Which of the following is a binary compound of oxygen and hydrogen?
(a) H₂O
(b) H₂O₂
(c) Both H₂O and H₂O₂
(d) None of these
Option c – Both H₂O and H₂O₂
In a chemical change, the total weight of the reacting substances compared to the total weight of products is
(a) never the same
(b) always less
(c) always more
(d) always the same
Option d – always the same
The cathode ray experiment was done for the first time by
(a) J.J. Thomson
(b) John Dalton
(c) Goldstein
(d) Rutherford
Option a – J.J. Thomson
The nucleus of an atom contains
(a) protons
(b) electrons
(c) protons and neutrons
(d) neutrons
Option c – protons and neutrons
In an atom, valence electrons are present in
(a) the outermost orbit
(b) next to the outermost orbit
(c) the first orbit
(d) any one of its orbit
Option a – the outermost orbit
The maximum number of electrons that can be accommodated in the third shell (n = 3) is
(a) 2
(b) 8
(c) 18
(d) 10
Option c – 18
In an atom, the constituent electrons
(a) do not move
(b) are uniformly distributed
(c) move around the nucleus in fixed levels.
(d) move around the energy nucleus in a random way.
Option c – move around the nucleus in fixed levels
Ammonia (NH3) obtained from different sources always has the same proportion of Nitrogen and Hydrogen. It proves the validity of the law of
(a) Reciprocal proportion
(b) Constant proportion
(c) Multiple proportions
(d) None of the above
Option b – Constant proportion
Neon is
(a) monoatomic
(b) diatomic
(c) triatomic
(d) tetra atomic
Option a – monoatomic
Which of the following has an atomicity of 4?
(a) H₂O
(b) NH3
(c) PCl5
(d) CCl4
Option b – NH3
The element present in water and hydrogen peroxide is
(a) hydride and oxide
(b) hydrogen and oxide
(c) hydride and oxygen
(d) hydrogen and oxygen
Option d – hydrogen and oxygen
Avogadro’s law states that equal volumes of all gases under similar conditions of temperature and pressure contain an equal number of
(a) Molecules
(b) Atoms
(c) Valency
(d) Isotopes
Option a – Molecules
A combination of one volume of nitrogen with three volumes of hydrogen produces
(a) one volume of ammonia
(b) two volumes of ammonia
(c) three volumes of ammonia
(d) one and a half volumes of ammonia
Option b – two volumes of ammonia
Which of the following statements is incorrect for cathode rays?
(a) They move in a straight line
(b) Their nature depends upon the nature of the gas present in the discharge tube.
(c) They cost shadows of solid objects placed in their path
(d) They get deflected towards a positive charge.
Option b – Their nature depends upon the nature of the gas present in the discharge tube
The isotopes of an element have
(a) the same number of neutrons
(b) the same atomic number
(c) the same mass number
(d) None of these
Option b – the same atomic number
Which of the following statements is not correct for Bohr’s model of an atom?
(a) The nucleus of an atom is situated at its center
(b) The electrons move in circular orbits
(c) Electrons jump from one orbit to another
(d) An electron neither loses nor gains energy when it jumps from one orbit to another.
Option d – An electron neither loses nor gains energy when it jumps from one orbit to another
The atomic number of an element is 11 and its mass number is 23. The correct order representing the number of electrons, protons, and neutrons respectively in this atom is
(a) 11, 11, 12
(b) 11, 12, 11
(c) 12, 11, 11
(d) 23, 11, 23.
Option a – 11, 11, 12
Which of the following pairs are 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 that has a mass number of 14 and has a 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 of the following has an equal number of neutrons and protons?
(a) Hydrogen
(b) Deuterium
(c) Fluorine
(d) Chlorine
Option b – Deuterium
The relative atomic masses of many elements are not whole numbers because
(a) they cannot be determined accurately
(b) the atoms ionize during the determination of their masses
(c) the existence of isotopes
(d) the presence of impurities
Option c – the existence of isotopes
What is the number of valence electrons of Al?
(a) 1
(b) 2
(c) 3
(d) 4
Option c – 3
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