CHEMISTRY ELEMENTS – GK QUESTIONS & ANSWERS
1. Which is the lightest element in the periodic table?
Answer: Hydrogen (H)
2. Which noble gas is commonly used in balloons?
Answer: Helium (He)
3. Which metal is mainly used in rechargeable batteries?
Answer: Lithium (Li)
4. Which toxic metal is used in aerospace alloys?
Answer: Beryllium (Be)
5. Borax is obtained from which element?
Answer: Boron (B)
6. Which element is the basis of organic life?
Answer: Carbon (C)
7. Which gas makes up about 78% of Earth’s atmosphere?
Answer: Nitrogen (N)
8. Which element is essential for respiration?
Answer: Oxygen (O)
9. Which is the most reactive halogen?
Answer: Fluorine (F)
10. Which noble gas glows red-orange in neon signs?
Answer: Neon (Ne)
11. Common salt (NaCl) contains which metal?
Answer: Sodium (Na)
12. Which metal burns with a bright white flame?
Answer: Magnesium (Mg)
13. Which metal is most abundant in Earth’s crust?
Answer: Aluminium (Al)
14. Which element is called the backbone of electronics?
Answer: Silicon (Si)
15. Which yellow non-metal is used in vulcanization of rubber?
Answer: Sulfur (S)
16. Which gas is used to disinfect drinking water?
Answer: Chlorine (Cl)
17. Which noble gas is used in electric bulbs and welding?
Answer: Argon (Ar)
18. Which soft metal is essential for plant growth and human health?
Answer: Potassium (K)
19. Which element is important for bones and teeth?
Answer: Calcium (Ca)
20. Which rare metal is used in aluminum alloys for strength?
Answer: Scandium (Sc)
21. Which metal is strong, lightweight, and used in aircraft?
Answer: Titanium (Ti)
22. Which element increases hardness of steel?
Answer: Vanadium (V)
23. Which element gives stainless steel its corrosion resistance?
Answer: Chromium (Cr)
24. Which element is essential for steelmaking and human metabolism?
Answer: Manganese (Mn)
25. Which metal is a major component of hemoglobin?
Answer: Iron (Fe)
26. Vitamin B₁₂ contains which element?
Answer: Cobalt (Co)
27. Which metal is commonly used in coins and stainless steel?
Answer: Nickel (Ni)
28. Which metal is the best conductor of electricity after silver?
Answer: Copper (Cu)
29. Which metal is used for galvanization to prevent rusting?
Answer: Zinc (Zn)
30. Which element has the lowest boiling point?
Answer: Helium (He)
Quick Exam Tips
Na, K → Highly reactive metals
He, Ne, Ar → Noble gases
Fe, Cu, Al → Industrial metals
C, O, N → Life-supporting elements
CHEMISTRY ELEMENTS
Lightest element → Hydrogen
Lowest boiling point element → Helium
Battery metal → Lithium
Toxic aerospace metal → Beryllium
Borax comes from → Boron
Organic life base → Carbon
Major atmospheric gas → Nitrogen
Supports combustion → Oxygen
Most reactive halogen → Fluorine
Red-orange glowing gas → Neon
Soft reactive metal in salt → Sodium
Fireworks metal → Magnesium
Aircraft metal → Aluminium
Electronics backbone → Silicon
Rubber vulcanization element → Sulfur
Water disinfectant gas → Chlorine
Welding noble gas → Argon
Essential plant nutrient metal → Potassium
Bone strengthening element → Calcium
Rare alloy metal → Scandium
Medical implant metal → Titanium
Steel-strengthening element → Vanadium
Corrosion-resistant metal → Chromium
Steelmaking trace element → Manganese
Blood oxygen carrier metal → Iron
Vitamin B₁₂ contains → Cobalt
Coin metal → Nickel
Best electrical conductor (common use) → Copper
Rust prevention metal → Zinc
Noble gases are → Chemically inert
Chemical symbol of Iron → Fe
Symbol of Potassium → K
Symbol of Sodium → Na
Symbol of Copper → Cu
Symbol of Silver → Ag
Most abundant element in universe → Hydrogen
Most used metal in world → Iron
Glass industry element → Boron
Toothpaste mineral → Fluorine
Electric bulb filament gas → Argon
Fertilizer gas → Nitrogen
Alloy of iron → Steel
Shiny plating metal → Chromium
Greenish-yellow gas → Chlorine
Blue pigment element → Cobalt
Essential immunity metal → Zinc
Semiconductor element → Silicon
Fireworks sparkle metal → Magnesium
Stainless steel component → Nickel
Coins and wires metal → Copper