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  9. Q306

RRB Technician (Grade I Signal + Grade III) 2024 · Question 306 of 1214

Which metals produce hydrogen gas when treated with very dilute nitric acid?

best-effort

  1. ACopper $(\mathrm{Cu})$ and cobalt $(\mathrm{Co})$
  2. BMagnesium $(\mathrm{Mg})$ and manganese $(\mathrm{Mn})$Correct
  3. CMagnesium $(\mathrm{Mg})$ and copper $(\mathrm{Cu})$
  4. DManganese $(\mathrm{Mn})$ and cobalt $(\mathrm{Co})$

Answer: B. Magnesium $(\mathrm{Mg})$ and manganese $(\mathrm{Mn})$

Official answer key verified. Detailed explanation coming soon.

Source: RRB Technician Grade 3 GK Questions: 23 Dec Shift 3 (4:30 PM - 6:00 PM) (testpaper.org compilation) · memory-based

← Q305View full paper (1214 questions)Q307 →

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