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What does the onset temperature in a thermogravimetric analysis (TGA) curve indicate?
  1. The temperature at which the sample starts to decompose
  2. The temperature at which the sample reaches its maximum weight
  3. The temperature at which the sample completes its decomposition
  4. The temperature at which the sample melts
Explanation

The onset temperature in a thermogravimetric analysis (TGA) curve indicates the point at which a material starts to experience a significant mass loss due to:

  • Thermal events such as decomposition,
  • Evaporation of volatiles
  • Or the initiation of reactions

This temperature serves as an important measure of a material's thermal stability, although it can be influenced by factors like heating rate, sample size, and atmosphere.


Related MCQs

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  2. Uniform flow
  3. Steady flow
  4. turbulent flow
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ریڈیو کس نے ایجاد کیا؟
  1. Graham Bell
  2. Thomas Edison
  3. Marconi
  4. Wright Brothers
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آواز کی پچ کس چیز پر ہوتی ہے؟
  1. Beats
  2. Frequency
  3. Amplitude
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  2. Dalton
  3. Einstein
  4. None of these
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وہ کمپیوٹر پروگرام جو پروگرام کی ہدایات کو ایک وقت میں ایک ہدایت مشینی زبان میں تبدیل کرتا ہے، کیا کہلاتا ہے؟
  1. Interpreter
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  3. CPU
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