Multiple choice

Which of the following statement are true?

  1. Melting points of alkaline earth metals are greater than those of alkali metals.
  2. All alkali metal carbonates are stable at a temperature around 800oC.
  3. Carbonates of alkali metals are more stable to heat than carbonates of alkaline earth metals.

  1. Only 1

  2. Only 2

  3. 3 only

  4. Both 1 and 2

  5. Both 2 and 3
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Melting points of alkaline earth metals are greater than those of alkali metals. Reason: 1. The atoms of alkaline earth metals have two delocalized electrons and their sizes are smaller than those of alkali metals.

  1. Alkaline earth metals have closed-packed structure while alkali metals have open structure (body-centered cubic).

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