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The number of electrons in the valence shell of calcium is: (1) 6 (2) 8 (3) 2 (4)4 Ans: 2
A 64-g sample of germanium-66 is left undisturbed for 12.5 hours. At the end of that period, only 2.0 g remain. What is the half-life of this material? 4. With a half-life of 28.8
Q. The pressure in a liquid droplet of radius r is greater than the pressure of the surrounding equilibrated gas phase by a quantity 2 =r, where is the surface tension. (a) Cons
WITH THE HELP OF A GRAPH, STATE THE DEVIATION OF MOLAR CONDUCTIVITY OF STRONG AGAINST WEEK ELECTROLYTE.
What is difference between silica used in TLC and HPLC column? TLC is called thin layer chromatography. The simple technique works on the principle of adsorption, where as HPLC i
Sulpha drugs: These are synthetic chemotherapeutic agents who consist of sulphonamide, -SO 2 NH 2 set in their organization. These were the firstly effective chemotherapeutic
Common or trivial names of some organic compounds Compound Common name Compound Common name CH 4 Methane
Wurtz reaction and Allylic bromination by N-Bromosuccinimide (A) Wurtz reaction - Ethyl bromide on treatment along with metallic sodium forms butane, ethane and ethylene by inc
A solution contains an unknown amount of osmium at the µg/g level, or below. Chemically pure osmium (Os) may be separated from the solution, but the chemical yields are variable an
Amino acids Proteins are a class of biologically significant substance. They are important to virtually all processes in living systems. A few of acids are hormones that offer
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