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Borax bead test : The transparent glassy bead while heated along with inorganic salt and the colour produced gives some idea of cation present in it.
Table:
Colour of bead in oxidising flame
Colour of bead in reducing flame
Basic radical present
Greenish when hot, blue in cold.
Red and opaque
Cu
Dark green in hot and cold
Same
Cr
Deep - blue
Deep blue
Co
Yellow when hot
Green
Fe
Violet in hot and cold
Colourless
Mn
Brown in cold
Grey or black or opaque
Ni
two oxides of a metal contain 27.6% and 30% oxygen. if the formula for the first oxide is m3o4 then what is the formula for the next oxide?
Q. What are the Chemical Properties of Ammonia? Ans. Combustion: Ammonia does not burn in air but will burn in pure oxygen to form nitrogen and water vapor. 4NH 3 (g) +
Biodegradable polymers These are the polymers that are degraded through micro-organisms in an appropriate period so that biodegradable polymers and their degraded products do n
Q. Show the applications in Bioinorganic chemistry? Bioinorganic chemistry or the study of the role of metal ions in biological cycles is mainly the study of some typical metal
various concepts of acid and base
explain why Cu2+ ion is not stable in aqueous solution?
what is the function of the charcoal in the purification of the 4-nitroanine 2.why is it not possible to obtain 2-and 4-nitroaniline by direct nitration of aniline (phenylamine)
N2O5
Question : (a) (i) What do you understand by the term "Public Health"? (ii) What are the three core functions of public health? (iii) How does a public health system
a 60.0g sample of water initially at 40.0 degree celcius is heated and converted to steam at 100 degree celcius. how much heat has been supplied to the sample during the pross. giv
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