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A metal dissolves in 3.0M NaOH solution ...

A metal dissolves in `3.0M NaOH` solution with evolution of gas to form a clear, colourless solution. Upon neutralization, the solution forms a gelatinous precipitate. What is the metal?

A

`AI`

B

`Ag`

C

`Cu`

D

`Mg`

Text Solution

Verified by Experts

The correct Answer is:
A
`{:(Ai+NaOH+H_(2)Orarr NaAIO_(2)+(3)/(2)H_(2)),(" "darrH^(+)//H_(2)O),(" "underset("White gelatinous ppt")(AI(OH)_(3)darr)):}`
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GRB PUBLICATION-SALT ANALYSIS-B. Dry Tests/Colour/Solubility/Heating Effects
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  13. What is the characteristic colour of the flame test for potassium?

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  16. A,B, C and D are respectively:

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