Overview: Properties of Metals Non Metals and Metalloids
General Science Chemistry portion me Properties of Metals Non Metals and Metalloids par questions sabse jyada high-frequency me puche jaate hain. RRB NTPC, RRB Group D, SSC CGL, aur CHSL exams me Malleability, Ductility, Reactivity Series, Amphoteric Oxides, aur Chemical Exceptions (jaise liquid metal Mercury aur liquid non-metal Bromine) se direct questions aate hain.
Key Exam Topics Covered in this Study PDF
- Physical Property Comparison: Malleability, Ductility, Sonorous nature, Thermal & Electrical Conductivity.
- Reactivity Series (K > Na > Ca… > Au): Metal displacement reactions aur extraction principles.
- High-Yield Exceptions: Mercury (liquid metal), Bromine (liquid non-metal), Iodine (lustrous non-metal), Diamond (hardest non-metal conductor of heat).
- Amphoteric Oxides & Metalloids: Al2O3, ZnO ke dual chemical behaviors aur Silicon, Germanium, Arsenic ke applications.
PDF Material Details
| Attribute | Specification Details |
|---|---|
| Topic Name | Properties of Metals Non Metals and Metalloids |
| Category | General Science — Inorganic & Applied Chemistry |
| Language | English / Hindi Mix (Aspirant Friendly) |
| Target Exams | RRB NTPC, SSC CGL, SSC CHSL, RRB JE, State PSCs |
| Core Focus | Reactivity Series, Amphoteric Oxides, Chemical Exceptions & PYQs |
Practice MCQs on Properties of Metals Non Metals and Metalloids
Apni concept retention check karne ke liye niche diye gaye 15 high-yield MCQs solve karein:
Q1. Which metal is liquid at room temperature (25°C)?
Check Answer
Answer: Mercury (Hg). (Note: Gallium and Cesium melt just above room temperature at around 28-30°C).
Q2. Which non-metal is in liquid state at room temperature?
Check Answer
Answer: Bromine (Br2 – reddish-brown liquid).
Q3. Which metal is the best conductor of electricity?
Check Answer
Answer: Silver (Ag), followed closely by Copper (Cu) and Gold (Au).
Q4. Which metal is so soft that it can be easily cut with a knife?
Check Answer
Answer: Sodium (Na) and Potassium (K). They have low densities and weak metallic bonding.
Q5. Why are Sodium and Potassium stored under Kerosene oil?
Check Answer
Answer: They are extremely reactive and react vigorously with moisture and oxygen in the air to catch fire.
Q6. Which non-metal is lustrous and has a shiny metallic appearance?
Check Answer
Answer: Iodine (I2).
Q7. What are metal oxides that react with both acids and bases to produce salt and water called?
Check Answer
Answer: Amphoteric Oxides (e.g., Aluminium Oxide – Al2O3 and Zinc Oxide – ZnO).
Q8. The ability of metals to be drawn into thin wires is known as:
Check Answer
Answer: Ductility (Gold is the most ductile metal; 1 gram can yield ~2 km of wire).
Q9. The ability of metals to be beaten into thin sheets without breaking is called:
Check Answer
Answer: Malleability (Gold and Silver are the most malleable metals).
Q10. Which non-metal is stored in water to prevent it from catching fire in air?
Check Answer
Answer: White Phosphorus (P4), because it spontaneously inflames in air at around 30°C.
Q11. Which metalloid is widely used as a semiconductor in computer microchips?
Check Answer
Answer: Silicon (Si) and Germanium (Ge).
Q12. What is the most abundant metal in the Earth’s crust?
Check Answer
Answer: Aluminium (~8.1% of Earth’s crust by mass), followed by Iron.
Q13. Which metal has the highest melting point among all metals?
Check Answer
Answer: Tungsten (W – melting point ~3422°C), which is why it is used as incandescent bulb filaments.
Q14. What happens when a more reactive metal (e.g., Zinc) is placed in Copper Sulphate solution?
Check Answer
Answer: Zinc displaces Copper, turning the blue solution colourless with reddish copper deposition (Zn + CuSO4 ➔ ZnSO4 + Cu).
Q15. Generally, non-metallic oxides in water form what type of solutions?
Check Answer
Answer: Acidic Solutions (e.g., SO2 + H2O ➔ H2SO3), whereas metallic oxides form basic solutions.
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FAQs: Properties of Metals Non Metals and Metalloids
Q1: What are Metalloids and give examples?
Ans: Metalloids are elements that exhibit intermediate properties between metals and non-metals. Common examples include Boron (B), Silicon (Si), Germanium (Ge), Arsenic (As), and Antimony (Sb).
Q2: What is an Amphoteric Oxide with examples?
Ans: Amphoteric oxides can react chemically with both acids and bases to produce salt and water. Examples include Aluminium Oxide (Al2O3) and Zinc Oxide (ZnO).
Q3: Why is Copper used in electrical wiring instead of Silver?
Ans: Although Silver is the best electrical conductor, Copper is significantly more economical, highly ductile, corrosion-resistant, and widely available for industrial wiring.
Q4: How can I download Properties of Metals Non Metals and Metalloids PDF for free on SarkariExamPDF?
Ans: Scroll to the download section, click "Click to Get Download Link", wait for the 10-second timer to finish, and click "Download PDF Now" to access the file on Google Drive.
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