OBJECTIVE LIFE SCIENCE
BIOCHEMISTRY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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have definite and constant properties under certain conditions
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are made up of only one material
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are elements or compounds
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All of the above.
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Detailed explanation-1: -An element is a pure substance as it cannot be broken down or transformed into a new substance even by using some physical or chemical means. Elements are mostly metals, non-metals or metalloids.
Detailed explanation-2: -Examples of pure substances include tin, sulfur, diamond, water, pure sugar (sucrose), table salt (sodium chloride) and baking soda (sodium bicarbonate). Crystals, in general, are pure substances.
Detailed explanation-3: -Pure substances are defined as substances that are made of only one type of atom or only one type of molecule. All the constituent particles of a substance are the same in their chemical nature.
Detailed explanation-4: -Hydrogen gas. Gold metal. Sugar (sucrose) Baking soda (sodium bicarbonate) Ammonia. Diamond. Copper wire. Silicon chip. More items •30-Aug-2018