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During a flame test why is calcium''s flame not persistent, while that of strontium is?
Ans) Because it does not have many ions as compared to the Strontium. It is the ions which produce color.
(a) Starting from a sample of chromate ore, how is potassium dichromate prepared? Explain all the steps included with chemical equations. (b) Write the balanced chemical equatio
What are the main factors that alter the speed of enzymatic reactions? Ans) The major factors that change the speed of enzymatic reactions are temperature, pH and substrate conc
Q. Can you explain Gels ? Gels may be formed by the proteins of egg or flour in products like souffles, puddings, custards, batters and doughs. When the protein particles a
The number of orbitals in 2p sub-shell is : (1) 6 (2) 2 (3) 3 (4) 4 Ans: 3
how to get its formula
Q. Define about Crystal Field Theory? This theory is based on two main assumptions. First, all the ligands are considered as point (negative) charges. It means that the size an
how can you explain the fact that lanthinides are highly electopositive?
Which has highest second ionisation energy? Electronic config of Na(+) is noble gas config. . so its very difficult to remove an electron so it will have very high 2nd ionisati
why f block is out from periodic table
Uses of Urea or Carbamide - Carboxylic Acids (a) Urea is used mainly as a nitrogen fertilizer. It has 46.4% nitrogen. (b) Urea is used in the manufacture of formaldehyde-ure
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