Alkali metals are powerful reducing agent because:
  • These are monovalent
  • These are metals
  • Their ionization potentials are low
  • Their ionic radii are large
Sodium has, as compared to potassium:
  • Larger atomic radius
  • More metallic character
  • Lower melting point
  • More ionization potential
Sodium reacts with water more vigorously than lithium because:
  • It has a higher atomic weight
  • It is more electronegative
  • It is more electropositive
  • It is a metal
An element having configuration 1s22s22p63s23p64s1 will form:
  • Basic oxide
  • Amphoteric oxide
  • Neutral oxide
  • Acidic oxide
As compared to Potassium, Sodium has:
  • Larger atomic radius
  • Lower melting point
  • More ionization potential
  • Less ionization potential
A substance X is a compound of an element of group 1, and gives violet colour in flame test. X is:
  • KCl
  • CsCl
  • NaCl
  • LiCl
Which of the following is kept under kerosene:
  • Rubidium
  • Sodium
  • Cesium
  • Lithium
Alkali metals are characterized by:
  • High ionization potentials
  • High melting points
  • Low oxidation potential
  • Good conductor of heat and electricity
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