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NEET UG d- and f-Block Elements — practice questions — page 4

Explore 94 free d- and f-Block Elements questions in NEET UG Chemistry. Open each question or exercise to read its content, reference answers and available explanation.

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d- and f-Block Elements questions and exercises with answers

Showing questions 91–94 of 94.

Which statement about interstitial compounds such as TiC is correct?Read the answer and worked solution →Colour of trivalent lanthanoid ions is attributed to what?Read the answer and worked solution →Which property is shared by all the actinoid elements?Read the answer and worked solution →What is the general oxidation state shown by the actinoids?Read the answer and worked solution →

Worked practice questions

Which statement about interstitial compounds such as TiC is correct?

  1. Poor electrical conductors
  2. Typically soft ionic solids
  3. Lower melting than pure metal
  4. Higher melting than pure metal
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Correct answer: D. Higher melting than pure metal

Interstitial compounds have melting points above those of the pure metals and remain hard and conducting.

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Colour of trivalent lanthanoid ions is attributed to what?

  1. Presence of d electrons
  2. Presence of f electrons
  3. Loss of s electrons
  4. Absence of f electrons
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Correct answer: B. Presence of f electrons

Colour of trivalent lanthanoid ions is attributed to their f electrons.

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Which property is shared by all the actinoid elements?

  1. They are radioactive
  2. They are gases
  3. They are non-metals
  4. They are colourless
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Correct answer: A. They are radioactive

Every actinoid is radioactive, and later members have very short half-lives.

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