Thiocyanogen (SCN)2 is stable only at: 

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DSSSB PGT Chemistry (Female) Official Paper (Held On: 06 Jul, 2018 Shift 1)
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  1. High temperature 
  2. Low temperature 
  3. Room temperature  
  4. Very high temperature 

Answer (Detailed Solution Below)

Option 2 : Low temperature 
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Detailed Solution

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CONCEPT:

Thiocyanogen (SCN)2

  • Thiocyanogen ((SCN)2) is a compound that is composed of two thiocyanate (SCN) groups linked together.
  • It is a highly reactive compound and is unstable at higher temperatures due to its tendency to decompose.
  • To maintain its stability, the conditions must favor minimal thermal agitation, which is achieved at low temperatures.

EXPLANATION:

  • The stability of thiocyanogen ((SCN)2) depends on the temperature:
    • At high or very high temperatures, the compound decomposes rapidly due to increased molecular motion and energy.
    • At room temperature, it is still prone to decomposition, though at a slower rate compared to higher temperatures.
    • At low temperatures, the thermal energy is reduced, preventing rapid decomposition and thus stabilizing the compound.

Therefore, thiocyanogen ((SCN)2) is stable only at low temperatures.

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