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Biology; Chemistry; Physics: Post your doubts here!

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Regarding the electricyt quesiton, I think it asked *which* option would conduct electricity, not which one would conduct maximum voltage. So confused..
 
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For B10. i wrote the two physical properties of Magnesium Astatide --> High melting point, Soluble in water. Is this right?
 
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That second one is a bit tricky. I went with does not conduct electricity when solid. :/

I was about to write that, but why can't it be soluble in water? Solubility is a physical property?

Whenever we talk about physical properties for ionic compounds, we mention solubility right?
 
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Did we have mention anything special in that c'graphy question? I just drew the appratus and told to get teh Rf Values and use them to find amino acids (assuming there is some chart or something that says ____ Rf Value = ______ amino acid)

Ninhydrin spray.
 
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Did we have mention anything special in that c'graphy question? I just drew the appratus and told to get teh Rf Values and use them to find amino acids (assuming there is some chart or something that says ____ Rf Value = ______ amino acid)

It's from the PP's.
1) Spot of mixture.
2) Locating Agent
3) RF Value.
4) Compare.
 
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