Which of the following salts has more conductivity? 

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DSSSB PGT Chemistry (Female) Official Paper (Held On: 06 Jul, 2018 Shift 1)
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  1. LiCl
  2. CaCl2
  3. LiCl3
  4. LiCl and LiCl3

Answer (Detailed Solution Below)

Option 2 : CaCl2
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Detailed Solution

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CONCEPT:

Conductivity of Salts

  • Conductivity of salts depends on the concentration of ions in solution and their mobility.
  • Salts that dissociate completely into multiple ions in solution typically have higher conductivity.
  • For example:
    • LiCl dissociates into two ions: Li+ and Cl-.
    • CaCl2 dissociates into three ions: Ca2+ and two Cl-.
    • LiCl3 is not a valid chemical formula and cannot exist.

EXPLANATION:

  • Among the given options:
    • LiCl produces two ions in solution, contributing to moderate conductivity.
    • CaCl2 produces three ions (Ca2+ and two Cl-), leading to higher conductivity due to the greater number of ions.
    • LiCl3 is not a valid compound.
    • The combination "LiCl and LiCl3" does not make sense, as LiCl3 does not exist.
  • Since CaCl2 dissociates into the highest number of ions, it exhibits the highest conductivity among the valid options.

Therefore, the correct answer is option 2 (CaCl2).

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