ELECTROLYSISLASER EXAM QUESTIONS AND LATEST UPDATED 2024/2025 ANSWERS
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Course
ELECTROLYSISLASER
Institution
ELECTROLYSISLASER
ELECTROLYSISLASER EXAM QUESTIONS AND LATEST UPDATED 2024/2025 ANSWERS
(element, compound, or mixture) One substance present, one phase present, cannot be broken down using chemical means - Answer-Element
/.(element, compound, or mixture) One substance present, three elements present - Ans...
(element, compound, or mixture) One substance present, one phase present, cannot be
broken down using chemical means - Answer-Element
/.(element, compound, or mixture) One substance present, three elements present -
Answer-Compound
/.(element, compound, or mixture) Two elements present, composition is variable -
Answer-Mixture
/.(element, compound, or mixture) Two substances present, one phase present -
Answer-Mixture
/.(t/f) A compound results from the physical combination of two or more elements -
Answer-False
/.(t/f) Elements and compounds are both pure substances - Answer-True
/.A colorless gas that reacts with two separate nitrogen compounds - Answer-
Compound
/.A compound can be broken down by ________________ means. - Answer-Chemical
/.A compound is a physical mixture of different elements - Answer-False
/.A compound must contain at least two elements - Answer-True
/.A compound results from the physical combination of two or more elements - Answer-
False
/.A mixture can be broken down or separated by ________________ means. - Answer-
Physical
/.Air - Answer-Matter
/.All heterogeneous mixtures must contain three or more substances - Answer-False
/.An element is considered a ______________ substance. - Answer-Pure
/.Aspirin tablets can be pulverized with a hammer - Answer-physical
/.Assign each of the following descriptions of matter to one of the following categories:
heterogeneous mixture, homogeneous mixture or pure substance. - Answer-
, /.Beryllium metal is extremely toxic to humans - Answer-Chemical
/.Blue color, single phase liquid, when boiled down leaves (evaporated) a solid residue -
Answer-Homo
/.Both elements and compounds are pure substances. - Answer-True
/.Cake - Answer-Matter
/.Classify each of the following as matter or non matter - Answer-
/.Classify each of the following observations about the behavior of a substance as
chemical property or a physical property of the substance - Answer-
/.Cloudy liquid that separates into two liquid overnight - Answer-Hetero
/.Compounds can be separated into their constituent elements by chemical means -
Answer-True
/.Compounds, but not elements, can have a variable composition - Answer-False
/.Compounds, but not elements, can have variable composition - Answer-False
/.crystalline substance that partially dissolves in alcohol while the other areas do not -
Answer-Hetero
/.Does not melt when heated to 100°C - Answer-Physical
/.Does not react with oxygen at 50°C - Answer-Chemical
/.Does not tarnish when exposed to dry air at 25°C - Answer-Chemical
/.Does tarnish when exposed to moist air at 25°C. - Answer-Chemical
/.Elements can be separated into their constituents compounds by physical means -
Answer-False
/.energy - Answer-Non Matter
/.gold - Answer-Matter
/.Group 1A of the periodic table is also know for its two other names:
____________________ elements and __________________ earth metals. This group
is part of the _____ block. - Answer-Representative Alkali S block
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