Q21. What is the symbol for phosphorus?
a) Ph
b) Po
c) P
d) Pa
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Correct Answer: c) P
Explanation: Phosphorus is represented by the symbol “P” in the periodic table. It is essential for energy transfer in cells and is a component of DNA and RNA.
Q22. Which element’s symbol is “Zn”?
a) Zinc
b) Zirconium
c) Zirconia
d) Xenon
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Correct Answer: a) Zinc
Explanation: Zinc is represented by the symbol “Zn” in the periodic table. It is a transition metal with various industrial applications, including galvanizing and battery production.
Q23. What is the symbol for neon?
a) No
b) Ne
c) Na
d) Ni
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Correct Answer: b) Ne
Explanation: Neon is represented by the symbol “Ne” in the periodic table. It is a noble gas known for its use in neon signs and lighting.
Q24. Which element’s symbol is “F”?
a) Fluorine
b) Francium
c) Ferrum
d) Flerovium
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Correct Answer: a) Fluorine
Explanation: Fluorine is represented by the symbol “F” in the periodic table. It is the most electronegative element and is widely used in toothpaste and water fluoridation.
Q25. What is the symbol for uranium?
a) Ur
b) Un
c) U
d) Ul
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Correct Answer: c) U
Explanation: Uranium is represented by the symbol “U” in the periodic table. It is a radioactive element used as fuel in nuclear reactors and in the production of nuclear weapons.
Q26. Which element’s symbol is “Sn”?
a) Tin
b) Tungsten
c) Thallium
d) Thorium
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Correct Answer: a) Tin
Explanation: Tin is represented by the symbol “Sn” in the periodic table. It is a malleable metal used in various alloys, coatings, and solders.
Q27. What is the symbol for chromium?
a) Cr
b) Ch
c) Co
d) Cm
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Correct Answer: a) Cr
Explanation: Chromium is represented by the symbol “Cr” in the periodic table. It is used in stainless steel production, plating, and various industrial applications.
Q28. Which element’s symbol is “Br”?
a) Boron
b) Beryllium
c) Bromine
d) Barium
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Correct Answer: c) Bromine
Explanation: Bromine is represented by the symbol “Br” in the periodic table. It is a halogen element used in flame retardants, pesticides, and pharmaceuticals.
Q29. What is the symbol for silver?
a) Si
b) S
c) Sv
d) Ag
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Correct Answer: d) Ag
Explanation: Silver is represented by the symbol “Ag” in the periodic table. It is a precious metal with various industrial, decorative, and monetary uses.
Q30. Which element’s symbol is “He”?
a) Helium
b) Hydrogen
c) Hafnium
d) Hassium
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Correct Answer: a) Helium
Explanation: Helium is represented by the symbol “He” in the periodic table. It is a noble gas with applications in cryogenics, welding, and helium-filled balloons.