Write ‘True’ or ‘False’
1) Mixtures combine chemically.
2) Anions are positive charge atoms or group of atoms.
3) Burning of a fuel is a chemical change.
4) Gases have the strongest intermolecular force of attraction.
5) Alloys are homogeneous mixtures.
Answers
Answer:
1: false
A mixture is a combination of two or more substances in any proportions. The substances in a mixture do not combine chemically, so they retain their physical property
2: false
An ion is an atom or group of atoms where the number of electrons is not equal to the number of protons. ... This type of ion is called an anion. When an atom loses electrons, this results in a positive charge. A positively charged ion is called a cation
3: Gasoline burns, reacting with oxygen in the atmosphere, generating light, heat, and converting the carbon-based molecules into carbon dioxide gas and water vapor. When substances combine like this and undergo chemical changes, we say that a chemical reaction has occurred
4: In gases, the intermolecular forces are negligible (extremely weak), and the constituent particles are free to move. As a result, gases, can occupy any space available to them
5: An alloy is a homogenous mixture of two or more metals or non-metals or nonmetals mixed in a molten state. It can either be a solid solution of the elements of a single phase or a mixture of two or more metallic phases. ... Some examples of alloys include - steel, solder, brass, amalgam, etc.
Answer:
1) False 2) False 3) True 4) False 5) True
Explanation:
1) Generally mixtures don't need to combine chemically, rather they can combine physically. In some cases mixtures combine chemically like mixing alloys.
2) Cations are positively charged ions or group of atomic ions. Anions are negatively charged atomic ions.
3) Gases don't have the strongest intermolecular force of attraction. gases have the least intermolecular force of attraction.
4) Alloys are homogeneous mixtures. It is found by eating metals at a very high temperature due to which metals melt and combine with each other.
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