Chemical Reactions and Plant Propagation Quiz
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Questions and Answers

What occurs when magnesium ribbon is heated?

  • It burns with a white dazzling flame. (correct)
  • It does not burn at all.
  • It melts without igniting.
  • It burns with a blue flame.

    • Which potato pieces are capable of growing into fresh green shoots?

  • Potato pieces with few leaves.
  • Potato pieces with buds. (correct)
  • Potato pieces that are fully sprouted.
  • Potato pieces without any buds.

    • What can be concluded about the money plant with green leaves?

  • It relies entirely on water for growth.
  • It can synthesize food through photosynthesis. (correct)
  • It is unable to grow into a plant.
  • It cannot photosynthesize.

    • What is the role of spores in reproduction?

    <p>To disperse and germinate on suitable substratum.</p> Signup and view all the answers

    What happens to potato pieces without buds?

    <p>They display no growth or development.</p> Signup and view all the answers

    Which metal reacts most vigorously with steam?

    <p>Magnesium</p> Signup and view all the answers

    Which surfaces can be compared to mirrors based on the content?

    <p>Curved surfaces like convex and concave mirrors.</p> Signup and view all the answers

    What is the result of vegetative propagation in plants?

    <p>It results in the fragmentation and growth of new individuals.</p> Signup and view all the answers

    What observation indicates the presence of hydrogen gas when collected in a jar?

    <p>It gives a 'pop' sound.</p> Signup and view all the answers

    What can be inferred about the effect of heating magnesium ribbon?

    <p>It produces Magnesium Oxide when burned in air.</p> Signup and view all the answers

    Which metal shows the fastest reaction with dilute hydrochloric acid?

    <p>Magnesium</p> Signup and view all the answers

    When iron reacts with copper sulfate solution, what color change occurs after a reaction?

    <p>Blue to green</p> Signup and view all the answers

    In terms of reactivity with dilute acids, what is the correct order for magnesium, aluminium, zinc, and iron?

    <p>Mg &gt; Al &gt; Zn &gt; Fe</p> Signup and view all the answers

    Which of the following metals does not react with water or steam?

    <p>Lead</p> Signup and view all the answers

    What is the outcome when a clean copper wire is placed in iron sulfate solution?

    <p>No reaction occurs.</p> Signup and view all the answers

    Which statement correctly reflects the relationship between the reactivity series and metal displacement reactions?

    <p>More reactive metals displace less reactive metals.</p> Signup and view all the answers

    What happens to lime water when carbon dioxide is produced during fermentation?

    <p>It turns milky.</p> Signup and view all the answers

    What is the primary gas produced during the fermentation process described?

    <p>Carbon dioxide.</p> Signup and view all the answers

    In the described experiment, what substance is used to clean the magnesium ribbon?

    <p>Sand paper.</p> Signup and view all the answers

    Which combination of materials is mixed to start the fermentation in the experiment?

    <p>Sugar solution and yeast.</p> Signup and view all the answers

    What is observed when the mixture is heated in the test tube?

    <p>A white dazzling flame is produced.</p> Signup and view all the answers

    How long does it generally take for lime water to turn milky after the introduction of carbon dioxide?

    <p>It takes a significant amount of time and effort.</p> Signup and view all the answers

    What is the primary purpose of using a bent glass tube in the experiment?

    <p>To pass air into the lime water.</p> Signup and view all the answers

    What is the expected outcome when magnesium is burned in the experiment?

    <p>It produces magnesium oxide powder.</p> Signup and view all the answers

    What is necessary for the rusting of iron to occur?

    <p>Both air and moisture are needed</p> Signup and view all the answers

    Which of the following is a displacement reaction?

    <p>Fe(s) + CuSO4(aq) -&gt; FeSO4(aq) + Cu(s)</p> Signup and view all the answers

    What is the molecular mass of C3H7OH?

    <p>60 u</p> Signup and view all the answers

    What is the difference in molecular formulae between C2H5OH and C3H7OH?

    <p>CH2</p> Signup and view all the answers

    Why do alcohols burn with a clean blue flame?

    <p>They are saturated hydrocarbons</p> Signup and view all the answers

    What can be deduced from the molecular mass differences in the homologous series of alcohols?

    <p>They differ by 14 u</p> Signup and view all the answers

    Which of the following statements correctly describes the observation of iron nails in test tubes?

    <p>Nails rust when exposed to both air and water</p> Signup and view all the answers

    What type of flame do unsaturated hydrocarbons like camphor and naphthalene produce?

    <p>A yellow flame with lots of black smoke</p> Signup and view all the answers

    What phenomenon is demonstrated by the experiment with the magnesium ribbon and the glass slab?

    <p>Refraction</p> Signup and view all the answers

    Why does the part of the line under the glass slab not appear bent?

    <p>The ray of light is perpendicular to the slab.</p> Signup and view all the answers

    What result is observed when the magnesium ribbon is heated and ignites?

    <p>It produces magnesium oxide powder.</p> Signup and view all the answers

    What happens to the light rays as they pass through the glass slab in this experiment?

    <p>They slow down and bend.</p> Signup and view all the answers

    What is the characteristic feature of the flame produced by burning magnesium?

    <p>It is a white dazzling flame.</p> Signup and view all the answers

    Why does the line beneath the glass slab appear raised?

    <p>Due to the effect of refraction.</p> Signup and view all the answers

    What should be done to the magnesium ribbon before heating it?

    <p>Clean it with sand paper.</p> Signup and view all the answers

    Where should the magnesium oxide powder be collected during the experiment?

    <p>Over a watch glass.</p> Signup and view all the answers

    How does the resistance of a conductor affect the motion of electrons?

    <p>Resistance retards the motion of electrons.</p> Signup and view all the answers

    What happens to the current in a series circuit with multiple resistors?

    <p>The current remains the same throughout.</p> Signup and view all the answers

    Which factors influence the resistance of a conductor?

    <p>Length, area, and material type.</p> Signup and view all the answers

    What is the relationship between potential difference across resistors in series?

    <p>The total potential difference equals the sum of individual voltages.</p> Signup and view all the answers

    If the cross-sectional area of a conductor increases, what happens to its resistance?

    <p>Resistance decreases.</p> Signup and view all the answers

    What is the significance of the ammeter's position in an electric circuit?

    <p>It ensures the current is the same at all points.</p> Signup and view all the answers

    How does increasing the length of a conductor affect its resistance?

    <p>Resistance increases with greater length.</p> Signup and view all the answers

    In a parallel circuit, how is the total current affected?

    <p>The total current is equal to the sum of individual currents through each path.</p> Signup and view all the answers

    Study Notes

    Activities and Experiments

    • Activity 1.5: Decomposition reaction of ferrous sulphate:

      • Take approximately 2 grams of ferrous sulphate crystals in a dry boiling tube.
      • Note the initial color of the crystals (green).
      • Heat the boiling tube over a burner flame (or spirit lamp).
      • Observe the color change of the crystals during heating. It first changes to white, then brown (ferric oxide).
      • Notice the smell of burning sulfur.

    • Activity 1.6: Decomposition reaction of lead nitrate:

      • Take approximately 2 grams of lead nitrate powder in a boiling tube.
      • Using a test tube holder, heat the tube over a Bunsen burner.
      • Observe the formation of brown fumes of nitrogen dioxide gas.
      • The formation of a yellow solid (lead monoxide) is also observed.
      • A glowing splinter held over the mouth of the tube will catch fire, indicating the presence of oxygen gas.

    • Activity 1.8: Decomposition of silver chloride by light:

      • Take about 2 grams of silver chloride in a china dish.
      • Observe and note the initial color (white).
      • Place the china dish in sunlight (or direct light).
      • Observe and record the change in color of the silver chloride after some time (it will turn greyish-white).

    • Activity 1.9: Displacement reaction between iron (nail) and copper sulphate:

      • Clean three iron nails using sandpaper.
      • Take two test tubes, each with about 10 mL of copper sulphate solution.
      • Tie two iron nails with a thread and immerse them in test tube B.
      • Keep one nail aside in test tube A for comparison.
      • After about 20 minutes, compare the color of the copper sulphate solution in test tubes A and B and the iron nails.
      • The solution in test tube B changes to light green, and the iron nails develop a reddish-brown coating.

    • Activity 1.10: Double displacement reaction between barium chloride and sodium sulphate:

      • Take 3 mL of sodium sulphate solution in a test tube.
      • Also take 3 mL of barium chloride solution in another test tube.
      • Mix the two solutions.
      • A white precipitate (barium sulphate) is observed in the solution.

    • Activity 1.11: Oxidation of copper to copper oxide:

      • Take about one gram of copper powder in a china dish.
      • Heat the china dish strongly over a Bunsen burner.
      • Observe the formation of a black substance.
      • This black substance is copper oxide.

    • Activity 2.3: Reaction of zinc granules with dilute sulphuric acid and testing hydrogen gas by burning:

      • Put zinc granules in a test tube and add dilute sulfuric acid.
      • Observe the release of gas bubbles.
      • Pass the gas through a soap solution.
      • Bring a burning splint to the gas bubble.
      • The gas burns with a pop sound (hydrogen).

    • Activity 2.5: Test for CO2 gas:

      • Take about 0.5 g of sodium carbonate and 0.5 g of sodium hydrogencarbonate in two test tubes.
      • Add 2ml of dilute HCl to both tubes.
      • Observe.
      • Pass the gas produced in each case through limewater (calcium hydroxide solution).
      • Observe.

    • Activity 2.8:Investigate whether all compounds containing hydrogen are acidic:

      • Take solutions of hydrochloric acid (HCl), sulphuric acid (H2SO4), glucose (C6H12O6), and alcohol.
      • Connect two iron nails to a 6-volt battery through a bulb and a switch.
      • Pour one of the solutions into the beaker.
      • Turn on the current.
      • Observe. Acid solutions conduct electricity.

    • Activity 2.9: Experiment to show that acids do not show acidic behaviour without water:

      • Take about 1g of solid NaCl in a clean and dry test tube.
      • Add some concentrated sulfuric acid to the test tube.
      • Observe the release of a gas.
      • Test the gas with both dry and wet blue litmus paper.

    • Activity 2.10: Adding Acid/Base in Water:

      • Add a few drops of concentrated sulfuric acid (H2SO4) to 10 mL of water in a beaker.
      • Observe the change in temperature.
      • This is an exothermic reaction. The beaker will become hot.
      • Repeat the experiment with sodium hydroxide pellets instead of H2SO4.

    • Activity 2.13: Determining Family of Salts:

      • Write chemical formulas for given salts (potassium sulphate, sodium sulphate, calcium sulphate, etc)
      • Identify acids and bases from which the salts are derived.
      • Identify families of salts based on similar positive or negative radicals (e.g., sodium salts, chloride salts).

    • Activity 3.1, 3.2, 3.3: Study of metal properties:

      • Observation of appearance of metals (iron, copper, aluminum, magnesium) and their shine.
      • Hardness of various metals (iron, copper, aluminum, magnesium, sodium).
      • Malleability of various metals (iron, zinc, lead, copper) to show that they can be hammered into sheets.

    • Activity 3.5: Metals: Good Conductors of Heat:

      • Observe that metals are good conductors of heat.

    • Activity 3.6: Metals: Good Conductors of Electricity:

      • Observe that metals are good conductors of electricity.

    • Activity 3.8: Most non-metals produce acidic oxides:

      • Burning magnesium and observing its acidic oxide.
      • Burning sulfur and observing its acidic oxide in water.

    • Activity 3.9: What happens when Metals are burnt in Air?

      • Observe reaction of various metals with oxygen when heated to form metal oxides.
      • Observe flame color and appearance of surface of metal after heating.
      • Arrange metals in order of reactivity with oxygen.

    • Activity 3.10: Reaction of metals with Steam:

      • Observe reaction of selected metals with steam.
      • Identify metals which react with steam, and the type of reaction.

    • Activity 3.11- Action of metals with acids:

      • Testing reactivity of metals with various acids, and observe the speed and types of reactions.

    • Activity 3.12: How do Metals react with Solutions of other Metal Salts:

      • Observe displacement reactions when metals are immersed in a solution containing its salts.
      • Write a balanced equation to represent displacement reaction.

    • Activity 3.14: Corrosion:

      • Observe rusting of iron nails in situations with different conditions of air exposure.

    • Activity 4.2: Homologous Series

      • Calculate difference in formulae and molecular mass of alcohols.
      • Identify homologous series for alcohols.

    • Activity 4.3: Properties of various compounds

      • Burn some carbon compounds (naphthalene, camphor, alcohol) and observe the nature of the flame.

    • Activity 4.4: Flames

      • Investigate conditions for different flame types.

    • Activity 4.5: Reaction of ethanol with potassium permanganate:

      • Observe the reaction of ethanol with potassium permanganate.

    • Activity 4.6: Reaction of Sodium with Ethyl alcohol:

      • Observe the reaction of sodium with alcohol (ethanol).
        • Observe the gas produced (hydrogen) and product (sodium ethoxide).

    • Activity 4.8: Esterification

      • Observe the esterification reaction between ethanol and ethanoic acid.

    • Activity 4.11: Hard water and soft water:

    • Activity 4.12- Test for hardness of water:

      • Observe hard water with soap vs soft water - to identify curdy precipitate in hard water.

    • Activity 6.1: To demonstrate that Chlorophyll is necessary for Photosynthesis:

      • Demonstrate and observe chlorophyll's role in photosynthesis.

    • Activity 6.2: Effect of Carbon Dioxide on Photosynthesis:

      • Observe differing starch levels in plants affected by absence or limited levels of CO2.

    • Activity 6.3: Activity to demonstrate action of salivary enzymes on starch:

      • Observe how saliva affects starch.

    • Activity 6.4: Testing for carbon dioxide:

      • Observe and measure the amount of CO2 exhaled by a person.

    • Activity 6.5: Fermentation:

      • Test for the products of fermentation using limewater.

    • Activity 7.2: Phototropism and Geotropism

      • Observe the growth patterns of shoots and roots in response to light and gravity.

    • Activity 8.1: Observe yeast reproduction.

    • Activity 8.2: Observe bread mold growth.

    • Activity 8.4: Observe growth of Spirogyra.

    • Activity 8.5: Observe potato growth.

    • Activity 8.6: Observe vegetative propagation in money plants.

    • Activity 8.7: Observe seed germination.

    • Activity 10.1: Reflection from curved mirrors.

    • Activity 10.2: Image of Sun produced by a concave mirror.

    • Activity 10.3, 10.5, 10.6: Activities on image formation by concave and convex mirrors.

    • Activity 10.7, 10.8: Activities illustrating refraction of light in various situations.

    • Activity 10.9: Refraction through a glass slab.

    • Activity 10.10, 10.11, 10.12, 10.13: Image formation by lenses (experiments to understand position and nature of image).

    • Activity 12.1- V-I Graph:

      • Studying and plotting the current-voltage relationship.

    • Activity 12.2: Comparison of current flow through resistances.

    • Activity 12.3: Investigation of factors influencing resistance - study of Resistance calculation involving length and area of cross-section.

    • Activity 12.4, 12.5: Resistance in series combinations to demonstrate how total resistances add up and potential difference distributes.

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    Activity Booklet Science 10th 2023 PDF

    Description

    Test your knowledge on chemical reactions involving metals and the process of vegetative propagation in plants. This quiz will cover various reactions, the role of spores, and growth potentials of potato pieces. Perfect for students studying chemistry and biology concepts related to plant and matter interactions.

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