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Thermal cracking. In thermal cracking, high temperatures (typically in the range of 450Â°C to 750Â°C) and pressures (up to about 70 atmospheres) are used to break the large hydrocarbons into smaller ones. Thermal cracking gives mixtures of products containing high proportions of hydrocarbons with double bonds - alkenes.
Catfacing is most common in the large-fruited beefsteak type tomatoes. Fruit Cracking Cracking is due to rapid fruit development and wide fluctuations in water availablity.