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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.
Energy of the electron in Hydrogen atom is given by: (1) E n = 131.38/ n 2 x kj mol -1 (2) E n = 131.33/n xkj mol -1 (3) E n = 1313.3/ n 2 x kj mol
What is purity criteria.
silicon carbide is prepared using the chemical reaction SiO2+3C producing SiC+2CO so how many grams of SiC can be produced from 15 grams of C
Consider 1:1 stoichiometric polymerisation of 1, 4-diaminobutane with sebacoyl chloride. (a) Write down a balanced chemical equation for the polymerization (b) Name the polym
When 100 ml of M/10 H2SO4 is mixed with 500 ml of My/10 NaOH then nature of resulting solution and normality of excess reactant left is
For which of the following sets of four quantum numbers, an electron will have the highest energy: n l m s
Borosilicate glass: in this boric anhydride is used in place of lime. This glass generally contains 75-81% silica, 10-13.5% B 2 O 3 , 4.5-6% Na 2 O and 2-5% Al 2 O 3 . Sometimes Z
Calculate the pH of 0.100 L of a buffer solution that is 0.22M in HF and 0.53M in NaF
Q. Illustrate Properties of Protons and Neutrons? Ans. We now know that following fundamental properties of protons and neutrons: 1. The proton has a charge of +1, which
out of Kr and Rb+ ,which has greater size and why?
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