Chemistry Chapter 6 Quiz
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Questions and Answers

What is the atomic number of the hypothetical element with an electron configuration of 1s22s22p63s23p5?

  • 10
  • 17 (correct)
  • 11
  • 18
  • Which biomolecules are excluded from being made of the same set of monomeric units?

  • Nucleic Acids
  • Proteins
  • Carbohydrates
  • Lipids and Fats (correct)
  • When radium undergoes alpha decay, what type of atom is formed?

  • Actinium Atom (Ac222) with 89 Protons
  • Barium Atom (Ba228) with 56 Protons
  • Francium Atom (Fr222) with 87 Protons
  • Radon Atom (Rn222) with 86 Protons (correct)
  • Which scenario is a correct application of Boyle’s Law?

    <p>A scuba diver notices a change in volume while ascending.</p> Signup and view all the answers

    What can be inferred about the properties of liquid A compared to liquids B and C?

    <p>Least dense and least viscous</p> Signup and view all the answers

    Which of the following illustrates a physical change?

    <p>Ice melting into water</p> Signup and view all the answers

    Why do farmers burn rice straw and hull during harvest?

    <p>To clear space for new planting</p> Signup and view all the answers

    What is the main result when an antacid tablet is dissolved in water?

    <p>Release of carbon dioxide bubbles</p> Signup and view all the answers

    What primary reaction results in acid rain?

    <p>Sulfur released from fossil fuels combines with water.</p> Signup and view all the answers

    Why is atmospheric nitrogen hard to assimilate into the nitrogen cycle?

    <p>Only a few organisms can directly use atmospheric nitrogen.</p> Signup and view all the answers

    Which statement about the greenhouse effect is incorrect?

    <p>The greenhouse effect absorbs light in the green spectrum.</p> Signup and view all the answers

    Why would a gardener cover a cutting with a perforated polythene bag?

    <p>To minimize the water demand of the cutting.</p> Signup and view all the answers

    Which biogeochemical cycle is linked to the increase in mushroom growth after lightning strikes?

    <p>Nitrogen cycle</p> Signup and view all the answers

    Which factors contribute to a rise in human population?

    <p>Immigration and natality</p> Signup and view all the answers

    What would occur if all snakes in a food web are eliminated?

    <p>Grasshopper population would increase.</p> Signup and view all the answers

    What role do mushrooms play in the ecosystem after a lightning strike?

    <p>Nitrogen fixers enriching the soil.</p> Signup and view all the answers

    Study Notes

    Element Identification

    • The hypothetical element with an electron configuration of 1s²2s²2p⁶3s²3p⁵ has an atomic number of 17, placing it in Group VIIA (or Group 17), called the Halogens.
    • It is located in the third period of the periodic table and at the third position in the p-block.

    Biomolecules in Organisms

    • All organisms are composed of biomolecules, primarily proteins, carbohydrates, nucleic acids, and lipids.
    • Lipids and fats differ as they are not derived from the same set of monomeric units.

    Alpha Decay of Radium Isotope

    • Radium (Ra) with atomic number 88 undergoes alpha decay to produce a Radon (Rn) atom with atomic number 86 and a total of 222 nucleons (86 protons, 136 neutrons).

    Boyle’s Law Application

    • Boyle's Law illustrates the inverse relationship between pressure and volume in gases.
    • A scuba diver experiences pressure changes when ascending and descending in water, demonstrating this principle.

    Liquid Properties

    • Liquid A, which floats over liquids B and C and flows the fastest, is least dense and least viscous among the three.

    Physical Changes

    • Melting of frozen mango juice at room temperature represents a physical change, as the substance remains the same despite a change in state.

    Rice Straw and Hull Burning

    • Farmers burn rice straw and hulls primarily to increase space for new crops, as the ashes produced enrich the soil with nutrients.

    Acid Rain Formation

    • Acid rain occurs when sulfur released from burning fossil fuels combines with water in the atmosphere, forming sulfuric acid.

    Nitrogen Cycle Integration

    • Difficulty in integrating atmospheric nitrogen into the nitrogen cycle arises from the fact that few organisms can utilize nitrogen gas directly.

    Greenhouse Effect Misconceptions

    • Greenhouse gases do not absorb the green region of sunlight; they primarily trap heat and are crucial for maintaining Earth's temperature.

    Plant Propagation Techniques

    • Covering cuttings with a perforated polythene bag helps reduce their water demand by creating a microenvironment that retains moisture.

    Lightning and Mushroom Growth

    • The nitrogen cycle facilitates mushroom growth following lightning strikes due to the availability of nitrogen compounds produced during the electrical discharge.

    Human Population Factors

    • Factors contributing to increased human population include immigration and natality rates, while emigration and mortality rates decrease it.

    Food Web Dynamics

    • If all snakes are eliminated from a food web, the populations of grass and grasshoppers would likely increase due to reduced predation pressure, affecting the overall ecosystem balance.

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    Quiz Team

    Description

    Test your understanding of electron configurations in this quiz focused on the periodic table. Identify the properties of a hypothetical element with a specified electron configuration and determine its correct placement. This quiz will enhance your grasp of atomic structure and group classification.

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