what are chemical twins
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Chemical twins are those in which the properties of some elements are same. Atomic size of Zr and Hf , Nb and Ta are similar. This is due to Lanthanide contraction.
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Mirror compounds are just like Zack and Cody. Cody is more studious and less fashionable, and Zack is just the opposite. In any pair of mirror compounds, the chemical behaviour of one will be quite different from the other. Let's see some examples.
Limonene is a compound present in citrus fruits. One form is S-limonene, which is found in lemons and gives the lemony smell. The mirror version is called R-limonene, and is found in oranges and gives an orange-y smell! Another compound is carvone. R-carvone gives the spearmint flavour in chewing gum, while S-carvone gives a caraway (siya-jeera) flavour (chemistry twins are always called R and S, or D and L).
Limonene is a compound present in citrus fruits. One form is S-limonene, which is found in lemons and gives the lemony smell. The mirror version is called R-limonene, and is found in oranges and gives an orange-y smell! Another compound is carvone. R-carvone gives the spearmint flavour in chewing gum, while S-carvone gives a caraway (siya-jeera) flavour (chemistry twins are always called R and S, or D and L).
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