What is dextro-rotatory and levo-rotatory?
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Explain about Oxide ?
What is the role of mercuric sulphate?
What is the role of silver sulphate?
Write the equation of photosynthesis?
Explain the Different forms of Glass ?
why do hard water never produce foam when a soap is dissolved?
Explain the process of spontaneous combustion?
What is glacial acetic acid? What are its uses?
Which is heavier, water or ice ?
Why do eye-glasses become fogged, when the wearer comes form the cold outdoors into a warm room ?
Why metallic tools used by blacksmiths have wooden handles ?
What is positive testing in relation to chemistry? For example, the sentence reads "Sample solutions are solutions known to contain one of each of the following ions, silver ion, Ag+(aq), barium ion, Ba2+(aq), and iron (III) ion, Fe3+(aq). Testing solutions are the solutions containing a polyatomic ion that can react with one of the metal ions to give a positive test." I am then asked to define what a "positive test" is. I am currently a student who is pretty new to chemistry, please try and make your answer as simply as possible. Thanks for the help.