Metals and Non-metals (Class 10 Science)

Metals and non-metals are the two main categories of elements with distinct physical and chemical properties. Understanding their characteristics and react

Metals and Non-metals (Class 10 Science)

Metals and non-metals are the two main categories of elements with distinct physical and chemical properties. Understanding their characteristics and react

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TL;DR: Metals and non-metals are the two main categories of elements with distinct physical and chemical properties. Understanding their characteristics and…

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Metals and non-metals are the two main categories of elements with distinct physical and chemical properties. Understanding their characteristics and react

Metals and Non-metals MCQs with Answers & Explanations

Q1. Which of the following is a physical property of metals?

  1. High melting point ✓ (correct)
  2. Poor electrical conductivity
  3. Non-malleable
  4. Non-ductile

Explanation: Metals generally have high melting points, are malleable, ductile, and are good conductors of electricity and heat.

Q2. Which of the following is a non-metal?

  1. Iron
  2. Oxygen ✓ (correct)
  3. Aluminum
  4. Copper

Explanation: Oxygen is a non-metal that is a gas at room temperature, while iron, aluminum, and copper are metals.

Q3. What happens when a metal reacts with oxygen?

  1. Acid is formed
  2. A non-metal is formed
  3. An oxide is formed ✓ (correct)
  4. A salt is formed

Explanation: When metals react with oxygen, metal oxides are formed, which are generally basic in nature.

Q4. Which metal does not react with dilute acids?

  1. Zinc
  2. Aluminum
  3. Iron
  4. Copper ✓ (correct)

Explanation: Copper is less reactive than hydrogen and does not react with dilute acids, unlike iron, zinc, and aluminum.

Q5. The most reactive metal among the following is:

  1. Sodium ✓ (correct)
  2. Magnesium
  3. Aluminum
  4. Iron

Explanation: Sodium is a highly reactive metal that reacts vigorously with water and air, more reactive than magnesium and iron.

Q6. Which of the following non-metals is a liquid at room temperature?

  1. Nitrogen
  2. Bromine ✓ (correct)
  3. Oxygen
  4. Chlorine

Explanation: Bromine is the only non-metal that is liquid at room temperature, while oxygen and nitrogen are gases, and chlorine is also a gas.

Q7. The reaction between a metal and a non-metal typically produces:

  1. An acid
  2. A base
  3. A salt ✓ (correct)
  4. A new metal

Explanation: The reaction between a metal and a non-metal typically produces ionic compounds called salts.

Q8. Which of the following metals forms an amphoteric oxide?

  1. Sodium
  2. Calcium
  3. Magnesium
  4. Aluminum ✓ (correct)

Explanation: Aluminum forms amphoteric oxide (Al2O3) that reacts with both acids and bases.

Q9. Metallic lustre is due to:

  1. Reflection of light ✓ (correct)
  2. Refraction of light
  3. Absorption of light
  4. Scattering of light

Explanation: The shiny appearance of metals is due to the reflection of light from their polished surfaces.

Q10. Which of the following is an alloy?

  1. Iron
  2. Brass ✓ (correct)
  3. Aluminum
  4. Copper

Explanation: Brass is an alloy of copper and zinc, while iron, copper, and aluminum are pure metals.

Frequently Asked Questions

Why are metals good conductors of electricity?

Metals have free electrons that move easily through their crystalline structure, allowing them to conduct electricity.

How does the reactivity series help predict reactions between metals and acids?

The reactivity series shows the order of reactivity of metals, with more reactive metals reacting faster and more vigorously with acids.

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