11th Grade Chemistry: Important Questions
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Questions and Answers

Which of the following is NOT a characteristic of a chemical element?

  • It consists of only one type of atom
  • It is listed in the periodic table
  • It can be broken down into simpler substances (correct)
  • It cannot be chemically transformed into a different element

What is the total number of valence electrons in the sulfur atom?

  • 10
  • 6
  • 8 (correct)
  • 4

What is the main role of a catalyst in a chemical reaction?

  • To increase the activation energy of the reaction
  • To lower the activation energy of the reaction (correct)
  • To change the stoichiometry of the reaction
  • To reduce the rate of the reaction

Which of the following statements is true about the octet rule?

<p>Transition metals do not follow the octet rule (D)</p> Signup and view all the answers

What is the significance of electronegativity in chemical bonding?

<p>High electronegativity difference leads to nonpolar covalent bonding (D)</p> Signup and view all the answers

What is the relationship between bond length and bond energy?

<p>Bond length and bond energy are inversely proportional (A)</p> Signup and view all the answers

What is the relationship between the atomic number and the number of protons in a chemical element?

<p>They are equal to each other (D)</p> Signup and view all the answers

What property of an element does the group number in the periodic table indicate?

<p>Number of valence electrons (D)</p> Signup and view all the answers

What is the significance of the Pauli exclusion principle in determining the electron configuration of an atom?

<p>It limits the maximum number of electrons that can occupy a single orbital (D)</p> Signup and view all the answers

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