1. Which of the following is/are correct regarding structural aspects of an atom
- (A) Protons carry positive charge
- (B) Electrons carry negative charge
- (C) Neutrons are electrically neutral
- (D) All of the above are correct
2. Which of the following sub particles surround the nucleus
- (A) Protons
- (B) Neutrons
- (C) Electrons
- (D) All of these
3. Which of the following depicts in short hand the structures of the atom of each element
- (A) Periodic table
- (B) Sub-shell
- (C) Energy level
- (D) Orbitals
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4. The number in the upper left hand corner of each element symbol is the
- (A) Atomic number
- (B) Mass number
- (C) Both (A) and (B)
- (D) None of these
5. Elements can exist in different forms, called isotopes, that have
- (A) Different numbers of neutrons
- (B) Different numbers of protons
- (C) same number of neutrons
- (D) None of the above
6. which of the following depicts the interactions between atoms
- (A) Bohr’s model
- (B) Hund’s rule
- (C) Planck’s la
- (D) All of these
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7. An orbital is not a physical quantity, but a way of imaging or representing
- (A) Electron arrangement
- (B) Proton arrangement
- (C) Neutron arrangement
- (D) None of the above
8. Usually the outermost shell is filled with eight electrons, the tendency of an atom to fill its outermost shell is thus called the-
- (A) Hexane rule
- (B) Heptane rule
- (C) Octet rule
- (D) None rule
9 Groups of electron orbitals form levels of energy called-
- (A) Energy house
- (B) Energy shell
- (D) Entropy
- (C) Enthalpy
10. Electrons tend to occupy the lowest possible energy shell, ie., the shell-
- (A) Away from the nucleus
- (B) Near the outermost orbit
- (C) Closest to the nucleus
- (D) Inside the nucleus
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11. A substance consisting entirely of atoms of the same atomic number is called
- (A) Element
- (B) Bond
- (C) Shell
- (D) Orbit
12. Which of the following bonds is formed when hydrogen atoms covalently bonded to one atom are attracted to an atom in another molecule
- (A) Ionic bond
- (B) Covalent bond.
- (C) Hydrogen bond
- (D) None of these
13. Dynamic attractions between molecules that occur when oppositely charged regions approach one another, are called
- (A) Covalent bonds
- (B) Ionic bonds
- (C) Hydrogen bonds
- (D) Van der Waals attractions
14. The process of sharing and exchanging electrons creates attachments or-
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- (A) Ionic bond
- (B) Element
- (C) Compound
- (D) Both (B) and (C)
16. Many macromolecules are so large that they are termed
17. Molecular weight measures a molecule‘s-
- (A) Density
- (B) Size
- (C) All of these
- (D) pH
18. Which of the following is/are not considered as organic (s)
- (A) Carbon monoxide
- (B) Carbon dioxide
- (C) Both (A) and (B)
- (D) None of the above
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19. Many of the molecules of life are held together by covalent bonds, which form when two atoms share
- (A) Valence neutrons
- (B) Valence electrons
- (C) Non-valence electrons
- (D) Whole molecule
20. Methane illustrates a non-polar covalent bond, which means that the atoms share all of the
- (A) Electrons
- (B) Protons
- (C) Neutrons
- (D) All of these
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