Differentiate between modern periodic table and mendeleevs table?
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What variety of carbon is used for refining purposes ?
why all the concentration of chemical species are measured using water as solvent (for examole 1N NaOH means 40 g of NaOH in one litre of water)eventhough there are so many solvents available?
Why is the total eclipse of the earth a rare phenomenon ?
Though the secondary cell can be recharged again and again, still they have a lifetime. Why?
A balloon constructed in Calcutta during July-August was found to show cracks at most wooden joints when received at Ferozepore in December. What is the probable cause ?
what is difference b/w "regio selectivity" & "sterio selectivity"
Mention a few application of cod test in environmental engineering practice.
How many electrons does benzene have?
We see the sun before it rises above the horizon in the morning. Why?
State lambert’s law.
why bottles of Hazardous chemicals or solvent are available in round shaped only?
Why is a vessel of water heats more quickly, when heat is applied at the bottom than it is heated at the top?