Question

action of dilute acid on a sulphide substance (warm if necessary)​

Answer 1

Answer:

If you heat iron filings ans sulphur to a sufficiently high temperature you form iron sulphide

Fe+S→FeS

If you add HCl to this the following reaction occurs:

FeS+2HCl→FeCl2+H2S

H2S gas is given off and iron chloride is produced.

Both are chemical compounds.

Answer 2

$\underline{\underline{\huge{\green{\tt{\textbf Answer:- }}}}}$

Aim of the experiment : To identify the unknown substance by the addition of dilute sulphuric acid the given substance may be .

• A sulphide
• A carbonate or
• A metal
• A sulphite

Apparatus and Chemicals : Test tubes , test tube holder , bunsen burner , given unknown substance

• a sulphide
• a carbonate
• or a metal substance

and dilute sulphuric acid (H2SO4)

Procedure : Take A Pinch of unknown substance in a test tube . To it add a few drops of dilute sulphuric acid . Shake it . Warm it , if necessary in bunsen burner flame and note down the observations according to the observation table.

$\colorbox{pink}{Observation Table is in attachment }$

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Sulphuric acid is one of the most important chemical .It is used in large number of industries as well as and Laboratories .The production and consumption of sulphuric acid in a country gives us the index of industrial advancement and economic prosperity of that country hence it is called king of chemicals.