Gamma rays have the highest penetration power because they:
A. Have no mass and no charge
B. Are heaviest
C. Carry positive charge
D. Are slowest
Answer: Option A
Solution (By JKExamLibrary)
Gamma rays are electromagnetic waves with no rest mass and no charge, so they do not readily interact with matter via ionization compared to alpha and beta particles. They can penetrate deep into materials, requiring dense lead or thick concrete for shielding. Alpha and beta particles interact strongly via charge, losing energy quickly. Gamma rays are similar to X-rays but from nuclear origin.
Explanation:
Biogas, commonly known as gobar gas in India, is produced by the anaerobic digestion of organic waste (like cattle dung) by methanogenic bacteria. The primary component of biogas is methane (CH4), which typically makes up 50-75% of the gas mixture, along with carbon dioxide and trace gases.
Explanation:
Galvanization coats iron with zinc. Zinc is more reactive, corrodes first (sacrificial protection). Tin coating protects only if intact. Chromium is used for plating, nickel for alloys, but galvanizing specifically uses zinc.
Explanation:
Chadwick (1932) produced highly penetrating neutral radiation by bombarding Be with α-particles, identified as neutrons. Reaction: ⁹Be + ⁴He → ¹²C + ¹n.
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