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Characteristic flame colour: specific metals and their salts impart particular colours to Bunsen burner flame.
(1) Pb (plumbum) impart pale greenish colour to the flame.
(2) Cu and Cu salts impart blue or green colour to the flame.
(3) Borates as well impart green colour to the flame.
(4) Ba and its salts impart apple green colour to the flame.
(5) Sr imparts crimson red colour to the flame.
(6) Ca imparts brick red colour to the flame.
(7) Na imparts yellow colour to the flame.
(8) K imparts pink-violet (Lilac) colour to the flame.
(9) Li imparts crimson-red, Rb imparts violet and Cs imparts violet colours to the flame.
(10) Livid- blue flame is given by As, Sb and Bi.
Q. Define shelf life? Shelf life is the time between the production and packaging of the product and the point at which it becomes unacceptable under defined environmental cond
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Iso-electronic species is: (1) F - ,O -2 (2) F - , O (3) F - , O + (4) F - , O +2 Ans: F - ,O- 2
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Chemical Kinetics of the Peroxodisulfate Ion The peroxodisulfate ion is one of the strongest oxidants that are called, although the oxidation reaction is relatively slow.
What wieght of CO is required to form re2(CO)10 from 2.5 gm of re2(O)7
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