Science Top 30 Questions For RRB NTPC For 2026 on Metals and Non-Metals

Science Top 30 Questions For RRB NTPC are set to strengthen core Chemistry concepts, especially Metals and Non-Metals, for quick and effective exam-oriented revision. The Railway Recruitment Board (RRB) Non-Technical Popular Categories (NTPC) examination is one of the most anticipated competitive exams. General Science, particularly Chemistry, is a scoring section that requires a clear understanding of concepts and their applications. Here is the compiled list of the top 30 science questions focusing on Metals and Non-Metals to assist aspirants in their preparation.  These are curated from the latest updated syllabus.

RRB NTPC Science 2026 Metals and Non-Metals

For the 2026 recruitment cycle, following a chapter-wise approach is recommended before moving to mixed practice sets. This method ensures that fundamental topics like "Metals and Non-Metals" are thoroughly mastered.

Understanding Metals and Non-Metals

Non-Metals: These elements are non-sonorous (do not produce sound when dropped), lack luster, and tend to gain electrons (forming anions). Examples include Hydrogen, Oxygen, Nitrogen, and Sulfur.

Metals: Metals are known for being malleable (can be beaten into thin sheets) and ductile (can be drawn into wires). Gold is recognized as the most malleable and ductile metal.

Key Exceptions:

• Diamond: A non-metal (carbon allotrope) that is highly lustrous due to its tetrahedral structure and Total Internal Reflection (TIR).

• Graphite: A non-metal that is a good conductor of electricity due to free ions.

• Bromine: The only non-metal that remains in a liquid state at room temperature.

• Mercury: A metal that exists as a liquid at room temperature and is a good conductor of heat.

Science Top 30 Questions For RRB NTPC

Below are the top 30 conceptual and previous-year-based questions for the RRB NTPC 2026 exam:

1. Malleability Property: What is the property called where metals are beaten into thin sheets?
   Answer: Malleability.

2. Ductility Definition: The ability of metals to be drawn into thin wires is known as?
   Answer: Ductility.

3. Best Conductors of Heat: Besides Silver, which other element is a top conductor of heat?
   Answer: Copper.

4. Liquid Metal: Which liquid is considered a very good conductor of heat and used in thermometers?
   Answer: Mercury.

5. Non-Reactive Metal: Which element does not react with water or steam?
   Answer: Lead (Seesha).

6. Non-Metal and Water: Which non-metal generally does not react with water even when steam is passed over it?
   Answer: Carbon.

7. Iron Extraction: From which ore is iron primarily obtained?
   Answer: Hematite (Part of the HL SIM ores: Hematite, Limonite, Siderite, Iron Pyrite, Magnetite).

8. Highest Electrical Conductivity: Which material has the highest electrical conductivity?
   Answer: Silver.

9. Sodium Atomic Structure: Where are electrons located in a Sodium atom?
   Answer: In the outer shells, while protons and neutrons are in the nucleus.

10. Ionic Bond Formation: How are ionic compounds formed?
    Answer: Through the transfer/donation of electrons, not sharing.

11. Covalent Bond Formation: Which bonds are formed by the sharing of electrons?
    Answer: Covalent bonds.

12. Liquid Non-Metal at Room Temp: Identify the non-metal that is liquid at room temperature.
    Answer: Bromine.

13. Most Ductile Metal: Which metal can be drawn into the thinnest wires without breaking?
    Answer: Gold.

14. Metalloids: What are substances that possess properties of both metals and non-metals?
    Answer: Metalloids (Updhatu).

15. Noble Metals: Which metals are chemically unreactive, such as pure Gold and Silver?
    Answer: Noble Metals.

16. Highly Reactive Metal: Which metal is stored in kerosene due to its high reactivity with air and water?
    Answer: Sodium.

17. Identifying Metals: Out of Carbon, Nitrogen, and Sodium, which is a metal?
    Answer: Sodium.

18. Identifying Non-Metals: Which of the following is a non-metal: Magnesium, Aluminum, or Nitrogen?
    Answer: Nitrogen.

19. Non-Malleable Exception: Which carbon allotrope does not show malleability and breaks easily?
    Answer: Graphite.

20. Element Definition: A substance that cannot be further divided by chemical cooling, heating, or electrolysis is called?
    Answer: An Element.

21. Hardest Metal: Which metal is known for its high melting point and hardness?
    Answer: Tungsten.

22. Plaster of Paris (POP): Chemically, what is Plaster of Paris?
    Answer: Calcium Sulfate Hemihydrate (formed by heating Gypsum).

23. Fluorescent Tubes: What substances are commonly used inside fluorescent tubes?
    Answer: Mercury vapor and Argon.

24. Rusting and Weight: Does the weight of iron increase or decrease when it rusts?
    Answer: It increases.

25. Amalgam Formation: Which metal is a necessary component for forming an amalgam?
    Answer: Mercury (stored in iron containers to avoid amalgam formation).

26. Medical Use of Amalgam: Where is amalgam commonly used in medical treatments?
    Answer: Root Canal Treatment (RCT) for dental fillings.

27. Heaviest Natural Element: Which is the heaviest naturally occurring element?
    Answer: Uranium.

28. Yellow Cake: What is the common name for the Uranium ore "Pitchblende"?
    Answer: Yellow Cake.

29. Mica in Industry: Why is Mica used in the electrical industry?
    Answer: It is a bad conductor of heat but a good conductor of electricity.

30. Non-Metal Oxides: What is the nature of oxides formed when non-metals react with oxygen?
    Answer: Acidic.

Science Top 30 Questions For RRB NTPC Video 

Watch this detailed video lecture to understand key concepts of Metals and Non-Metals through important exam-focused questions, explanations, and quick revision tips aligned with the latest RRB NTPC 2026 syllabus.

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