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Rajasthan Board Class 10 (RBSE) Metals & Non-metals — practice questions

Explore 14 free Metals & Non-metals questions in Rajasthan Board Class 10 (RBSE) Science. Open each question or exercise to read its content, reference answers and available explanation.

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Metals & Non-metals questions and exercises with answers

Showing questions 1–14 of 14.

The ability of metals to be drawn into thin wires is calledRead the answer and worked solution →The metal that is liquid at room temperature isRead the answer and worked solution →A metal dissolves only in a 3:1 mixture of concentrated HCl and HNO₃ (aqua regia), not in either acid alone. The metal isRead the answer and worked solution →Which acid generally does NOT give hydrogen gas on reacting with metals (except Mn, Mg)?Read the answer and worked solution →In the reactivity series, which metal would be displaced from its salt solution by all of Fe, Zn and Al?Read the answer and worked solution →Metals that are refined by electrolytic refining includeRead the answer and worked solution →Which metals are extracted by electrolysis of their molten chlorides?Read the answer and worked solution →On prolonged reaction of iron with steam, the oxide formed isRead the answer and worked solution →Which property is generally NOT shown by metals?Read the answer and worked solution →Which of the following is NOT an ionic compound?Read the answer and worked solution →A property generally NOT exhibited by ionic compounds isRead the answer and worked solution →A non-metal that is lustrous isRead the answer and worked solution →Which metal does NOT react with either cold or hot water, but reacts with steam?Read the answer and worked solution →Metals found in the native (free) state in nature are generallyRead the answer and worked solution →

Worked practice questions

The ability of metals to be drawn into thin wires is called

  1. ductility
  2. sonorousness
  3. malleability
  4. conductivity
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Correct answer: A. ductility

Ductility is the property of being drawn into wires. Malleability is being beaten into sheets.

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The metal that is liquid at room temperature is

  1. bromine
  2. sodium
  3. gallium
  4. mercury
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Correct answer: D. mercury

Mercury is the only metal liquid at room temperature. Gallium melts at ~30°C (just above room temp) bromine is a liquid but a non-metal.

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A metal dissolves only in a 3:1 mixture of concentrated HCl and HNO₃ (aqua regia), not in either acid alone. The metal is

  1. gold
  2. copper
  3. iron
  4. zinc
Show answer and solution

Correct answer: A. gold

Gold is unreactive to single acids but dissolves in aqua regia (3 HCl : 1 HNO₃), which is why aqua regia is famous for dissolving noble metals.

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