Science Class 10th Model Test Paper: Multiple Choice Questions

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Questions and Answers

When lead nitrate and potassium iodide are mixed, what yellow precipitate is formed?

  • Lead oxide
  • Potassium nitrate
  • Lead iodide (correct)
  • Potassium oxide

What is the process responsible for the strong smell from mint after some days?

  • Displacement
  • Corrosion
  • Oxidation (correct)
  • Reduction

What is the pH of a neutral solution?

  • Less than 7
  • 0
  • Greater than 7
  • 7 (correct)

What is the ability of metals to be drawn into thin wires known as?

<p>Ductility (D)</p> Signup and view all the answers

In which of the following is tartaric acid found?

<p>Vinegar (B)</p> Signup and view all the answers

During the electrolytic refining of copper, what is the cathode made of?

<p>Pure copper (B)</p> Signup and view all the answers

Which of the following is an involuntary action?

<p>Chewing (A)</p> Signup and view all the answers

Which disease is caused due to sexual contact?

<p>Cholera (A)</p> Signup and view all the answers

What is the human called that has XY chromosomes?

<p>Female (A)</p> Signup and view all the answers

Which material cannot be used to make a lens?

<p>Clay (C)</p> Signup and view all the answers

What is the mode of reproduction in Spirogyra?

<p>Regeneration (C)</p> Signup and view all the answers

What color would the sky appear when seen from the moon?

<p>Black (B)</p> Signup and view all the answers

What instrument is used to protect electric circuits from short-circuiting and overloading?

Signup and view all the answers

Which metal is used in making the filament of an electric bulb?

<p>Copper (D)</p> Signup and view all the answers

Which of the following is non-biodegradable?

<p>Glass (D)</p> Signup and view all the answers

What is the molecular formula of ozone?

<p>O5 (A)</p> Signup and view all the answers

Match the following with their correct terms:

<p>Reduction of mint smell = Oxidation Yellow precipitate from lead nitrate and potassium iodide = Lead iodide pH of a neutral solution = 7 Ability of metals to be drawn into thin wires = Ductility</p> Signup and view all the answers

Match the following with their correct terms:

<p>Tartaric acid found in = Vinegar ATP full form = Adenosine Tri-Phosphate Release of water from guard cells = Guard cell get open Mode of excretion in plants = Transpiration</p> Signup and view all the answers

Match the following with their correct terms:

<p>Part of the brain that can be divided into two hemispheres = Fore brain Electrolytic refining of copper cathode material = Pure copper Mint smell due to = Oxidation ATP molecular formula = Adenosine Tri-Phosphate</p> Signup and view all the answers

Match the following diseases with their mode of transmission:

<p>AIDS = Sexual contact Cholera = Contaminated food or water Elephant’s Foot = Radiation exposure Tuberculosis = Airborne droplets</p> Signup and view all the answers

Match the following materials with their primary usage in optics:

<p>Water = Focusing lenses Glass = Making lenses and prisms Plastic = Manufacturing eyeglasses Clay = Optical instruments</p> Signup and view all the answers

Match the following human body parts with their respective functions:

<p>Ammeter = Measuring electric current Unit of Resistance = Measuring electrical resistance Near Sightedness = Correcting vision Mirror Formula = Calculating image distance</p> Signup and view all the answers

Match the following scientific phenomena with their correct explanations:

<p>Drinking Alcohol = Ethanol Concave Lens = Diverging light 1/V+1/U=1/F = Mirror formula Electric Current = Flow of electric charge</p> Signup and view all the answers

Why should a magnesium ribbon be rubbed before burning in the air

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Study Notes

Chemical Reactions

  • When lead nitrate and potassium iodide are mixed, a yellow precipitate of lead iodide is formed.

Biology

  • The strong smell from mint after some days is due to the process of fermentation.

Acids and Bases

  • The pH of a neutral solution is 7.

Metals

  • The ability of metals to be drawn into thin wires is known as ductility.

Food Chemistry

  • Tartaric acid is found in grapes.

Electrolysis

  • During the electrolytic refining of copper, the cathode is made of pure copper.

Human Physiology

  • An involuntary action is a reflex action.

Sexually Transmitted Diseases

  • Sexually transmitted diseases (STDs) are caused by sexual contact.

Human Genetics

  • A human with XY chromosomes is a male.

Optics

  • Wood cannot be used to make a lens.

Botany

  • The mode of reproduction in Spirogyra is fragmentation.

Astronomy

  • The sky would appear black when seen from the moon.

Electrical Circuits

  • A fuse is an instrument used to protect electric circuits from short-circuiting and overloading.

Electric Bulbs

  • Tungsten is used in making the filament of an electric bulb.

Environmental Science

  • Plastic is a non-biodegradable material.

Chemistry

  • The molecular formula of ozone is O₃.

Matching Terms

  • Various matches:
    • Lead iodide: yellow precipitate
    • Fermentation: strong smell from mint
    • pH 7: neutral solution
    • Ductility: ability to be drawn into thin wires
    • Grapes: tartaric acid
    • Pure copper: cathode in electrolytic refining
    • Reflex action: involuntary action
    • Sexual contact: STDs
    • XY chromosomes: male human
    • Wood: cannot be used to make a lens
    • Fragmentation: mode of reproduction in Spirogyra
    • Black: sky color from the moon
    • Fuse: protects electric circuits
    • Tungsten: filament material in electric bulb
    • Plastic: non-biodegradable
    • O₃: molecular formula of ozone

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