Mixture of sulphur and iron filings
Test Yourself Formative Assessment
Saparation of iron filings
A
Fill in the blanks
1
2. A(n)
3.
is an element and
isa compound (Water/Oxygen)
is the smallest particle that shows all the properties of a compound (atom/molecule)
isan element that is aliguidat room temperature (Bromine/Chlorine)
cannot be separated into its constituents by physical means. (mixture/compound)
of various gases (mixture/element)
4. A
В.
5. Airisa(n)
Match the following:
Column A
ColumnB
1
Silver
(a) Solid element
2. Sodium chloride
3. Sea water
(b) Liquid element
(c) Compound
(d) Gaseous element
4. Mercury
5. Hydrogen
Mixture
CHEMICAL SYMBOLS
☆ of #
Anime
Gold Aga Forces
Generally elements have been named by the scientists who discovered them.
ames while others have English names. To avoid
Answers
Answer:
This demonstration or class experiment shows the exothermic reaction of two elements, iron and sulfur, to form the compound, iron sulfide. The two solids are mixed and heated in a test tube (or ignition tube). The reaction can be used to illustrate elements, mixtures and compounds
This reaction can be carried out as a demonstration or class experiment in a well ventilated laboratory provided that the instructions provided here are strictly adhered to.
The reaction can be carried out in borosilicate glass test tubes as a demonstration or in smaller (ignition) tubes by students. The reaction provides an opportunity to show that the properties of a compound are different from its constituent elements.
The reaction must not be carried out on tin lids in the open laboratory as is suggested in some sources. The sulfur may boil or burn releasing sulfur dioxide which is a TOXIC and CORROSIVE gas and may trigger an asthmatic attack.
Answer:
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Explanation:
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