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Quiz Chapter 6: Periodic Table

10 questions · Form 1 Science Bab 6: Periodic Table

10 questions · plays in fullscreen

Full Question List & Answer Key

Prefer reading to quizzing? All 10 questions are listed below with the answer and explanation under each one.

1. Which physical separation technique isolates different color dyes present in black ink?

  1. Paper chromatography
  2. Simple distillation
  3. Sedimentation
  4. Filtration
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Answer: A

Paper chromatography separates different dissolved pigments based on their varying solubilities in a solvent.

2. Which of the following is a general physical characteristic of metals?

  1. Dull appearance
  2. Poor electrical conductivity
  3. Good heat conductivity
  4. Brittle texture in solid form
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Answer: C

Metals are generally excellent conductors of both heat and electricity, with shiny surfaces and high ductility/malleability.

3. How can a compound like water ($H_2O$) be decomposed into its constituent elements (hydrogen and oxygen)?

  1. Filtration through micro-filters
  2. Boiling to high temperatures
  3. Electrolysis
  4. Paper chromatography
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Answer: C

Decomposing a compound requires chemical methods; passing an electric current through water (electrolysis) breaks it into hydrogen and oxygen gas.

4. What happens when iron reacts chemically with sulfur upon heating?

  1. A mixture of iron and sulfur is formed
  2. Iron sulfide (a compound) is formed with completely new properties
  3. Iron dissolves into sulfur liquid without chemical change
  4. A magnetic gas is produced
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Answer: B

Heating iron and sulfur causes a chemical reaction forming iron sulfide ($FeS$), a compound that is non-magnetic and chemically distinct.

5. Which element is liquid at room temperature and classified as a metal?

  1. Bromine
  2. Mercury
  3. Sodium
  4. Chlorine
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Answer: B

Mercury is a metal that remains liquid at normal room temperature.

6. Which technique recovers pure drinking water from seawater by boiling and condensing the vapor?

  1. Distillation
  2. Filtration
  3. Decantation
  4. Magnetic separation
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Answer: A

Distillation boils liquid into steam and condenses it back into pure water, leaving dissolved salt behind.

7. What property allows silicon to be classified as a metalloid?

  1. It is a liquid at room temperature
  2. It exhibits properties intermediate between metals and non-metals
  3. It reacts violently with water to release hydrogen gas
  4. It cannot form chemical compounds
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Answer: B

Metalloids like silicon share characteristics of both metals and non-metals, often functioning as semiconductors.

8. Which separation method is best suited to separate iron filings from sulfur powder?

  1. Filtration
  2. Evaporation
  3. Magnetic separation
  4. Chromatography
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Answer: C

Iron is a magnetic metal, so a magnet can easily attract iron filings while leaving non-magnetic sulfur powder behind.

9. What is the smallest unit of an element that retains its chemical properties?

  1. Molecule
  2. Compound
  3. Atom
  4. Mixture
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Answer: C

An atom is the smallest particle of an element that can participate in chemical reactions.

10. Elements belonging to the same vertical group in the Periodic Table share similar...

  1. Proton numbers
  2. Numbers of electron shells
  3. Chemical properties
  4. Physical states at room temperature
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Answer: C

Elements in the same group possess the same number of outer (valence) electrons, giving them similar chemical properties.

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