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Structure of the Atom (Set - III)

Structure of the Atom Set - III

12 Questions Published
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Questions

Question 1 Multiple Choice (Single Answer)

Which of the following is NOT a characteristic of cathode ray?

  1. It consists of charged particles.
  2. It always travels in a straight line.
  3. It moves towards cathode.
  4. It has mass.
  5. It originates from cathode plate.
Question 2 Multiple Choice (Single Answer)

Which of the following statements is incorrect?

  1. Magnitude of charge in canal rays may vary.
  2. Magnitude of charge in cathode rays does not vary.
  3. Mass of the particles in canal rays may vary.
  4. Mass of the particles in cathode rays may vary.
  5. Canal rays possess positive charge.
Question 3 Multiple Choice (Single Answer)

Which of the following limitations in Rutherford's model of atom leads to its failure?

  1. Inability to calculate size of nucleus
  2. Inability to find charge on nucleus
  3. Inability to determine radius of atom
  4. Inability to explain stability of atom
  5. Inability to determine distribution of charges in atom
Question 4 Multiple Choice (Single Answer)

Which of the following elements tend to have their atomic masses in decimals?

  1. Elements having different isotopes
  2. Elements having different isobars
  3. Elements with variable valencies
  4. Elements with tendency to form cations
  5. Elements with tendency to form anions
Question 5 Multiple Choice (Single Answer)

An element contains four shells K, L, M and N in its atoms. What is the maximum number of electrons that can be accommodated in the 'N' shell?

  1. 2
  2. 8
  3. 18
  4. 32
Question 6 Multiple Choice (Single Answer)

Which of the following was proved by Rutherford’s alpha particle scattering experiment?

  1. Presence of negative charge on electrons
  2. Presence of positive charge in the nucleus of an atom
  3. Presence of neutrons and protons in the nucleus
  4. Presence of electrons in an atom
Question 7 Multiple Choice (Single Answer)

Which of the following statements was included in Thomson's model of an atom?

  1. Nuclear arrangement in atom
  2. Neutrality of an atom
  3. Presence of neutron
  4. Nuclear size compared to atom
  5. Revolution of electrons around nucleus
Question 8 Multiple Choice (Single Answer)

Which of the following sub-atomic particles are responsible for generating anions or cations?

  1. Nucleons
  2. Protons
  3. Electrons
  4. Neutrons
  5. Protons and electrons
Question 9 Multiple Choice (Single Answer)

If valence electrons of Al and O are 3 and 6 respectively, which of the following compounds will be formed by reaction of aluminium and oxygen?

  1. AlO2
  2. Al2O3
  3. Al3O6
  4. Al6O3
  5. Al2O
Question 10 Multiple Choice (Single Answer)

Almost the entire mass of an atom is in the nucleus. Which of the following are present in the nucleus?

  1. Electrons
  2. Electrons and protons
  3. Protons
  4. Protons and neutrons
  5. Neutrons
Question 11 Multiple Choice (Single Answer)

In context to the model for the structure of an atom given by Neil Bohr in 1913, which of the following statements is not correct?

  1. There are three sub-atomic particles: electrons, protons and neutrons.
  2. There is no limit to the number of electrons which any energy level can hold.
  3. Protons and neutrons are located in a small nucleus at the centre of the atom.
  4. Electrons revolve rapidly round the nucleus in fixed circular paths called shells.
Question 12 Multiple Choice (Single Answer)

Which of the following statements is/are false? 

(a) If an element combines with another element by the loss or gain of electrons to form electrovalent compounds, its valency is known as electrovalency.

(b) The number of neutrons in one atom of an element is known as the atomic number of the element. 

(c) Electron arrangement of noble gases is very stable that they do not allow their outermost electrons to take part in chemical reactions.

  1. Only (a)
  2. Only (a) and (b)
  3. Only (b)
  4. Only (b) and (c)
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