Class XI

NaOH + HCl →
  1. Na(OH)2 + H2
  2. NaCl + H2
  3. NaCl + H2O
  4. NaCl + H2 + O2
 Fixed positions of valence electrons makes materials
  1. Conductors
  2. Insulators
  3. Electrodes
  4. Catalysts
 A covalent liquid which does not conduct electricity is
  1. Strong electrolyte
  2. Non-electrolyte
  3. Weak electrolyte
  4. A bad insulator
 Sn is symbol of
  1. Selenium
  2. Silicon
  3. Tin
  4. Lead
Common salt is
  1. Acidic
  2. Alkaline
  3. Neutral
  4. Basic
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