Answer Posted / hemant kumar

copper,zinc

What is dextro-rotatory and levo-rotatory?

1218

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Write the equation of photosynthesis?

1122

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How are the waters classified based on the degree of hardness?

1151

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what is difference b/w "regio selectivity" & "sterio selectivity"

2443

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What are filters? Why are they used?

1099

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What are hard waters?

1028

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What are the uses of glacial acetic acid?

1119

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Why is ammonia-ammonium chloride buffer added?

1174

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What is photoelectric colorimeter?

1035

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What is mineral water?

1078

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How is arsenic produced?

1063

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What forms the basis for colorimetric determination?

1188

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what is the relation between Total organic carbon and Chemical Oxygen demand?

2926

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which gas is used in preaparation of bit salt

2322

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Why we use potassium dichromate in control of absorbance in uv region and copper sulphate in control of absorbance in visible region?

2982

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