Class XI

Valency of Carbon (C) is
  1. 1
  2. 2
  3. 3
  4. 4
In neutralization reactions, for data logging
  1. Biosensors should be used
  2. Gas syringe shall be used
  3. Conductivity meters shall be used
  4. Heat sensors should be used
Metals are solids except
  1. helium
  2. selenium
  3. mercury
  4. Potassium
Giant crystal lattices are only formed in
  1. Ionic compounds
  2. Covalent compounds
  3. Metallic compounds
  4. Dative bond
In Na2CO3.10H2O, percentage of sodium is
  1. 0.1678
  2. 0.1608
  3. 0.1659
  4. 0.1684
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