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What is flame test and why do alkali met...

What is flame test and why do alkali metals show characteristic colours in the flame?

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Why do alkali metals show characteristic colours in a non luminous flame?

Why do alkali metals not show variable oxidation states ?

Why do alkali metals respond to flame test?

Why do alkaline earth metals and their compounds impart characteristic colours to the flame?

Give reasons for the following: a. Alkli metals do not occur free in nature. b. Alkali metal salts impart characteristic colour to the flame. c. Caesium is used in photoelectric cell. d. Alkali metals are good reducing agents in aqueous medium.

Why do alkali metal tarnishes in air?

Why do alkali metal tarnishes in air?

Why do alkali metals possess low densities?

(a). Which alkaline earth metals do not give characteristic colour to the Bunsen flame? (b). Why alkaline earth metals do not form tripositive ions? (c ). Why alkaline earth metals are diamagnetic, but alkali metals are paramagnetic? (d). Why the first inonisation enthaply pf alkaline earth matals is higher than those of corresponding alkali metals? (e). Why alkaline earth metals are less electropositive than corresponding alkali metals?

Which of the following does/do not impart characteristic colour to the flame?