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B
ammoniated solutions
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C
melted salts
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D
nature
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Solution
The correct options are B melted salts C nature D aqueous solutions
Alkali metals are the first group in the periodic table. They are never found in nature uncombined because they are unstable and they react fast to other elements. They bond well with all elements except the noble gases.
Alkali elements can be prepared from aqueous solutions, melted salts, nature etc.