Which substance cannot be separated physically or chemically? a solution an element a compound a mixture
2 answers:
<u>Answer:</u> The substance that cannot be separated physically or chemically is an element.
<u>Explanation:</u>
For the given options:
A solution is defined as the solution in which the components gets completely dissolved in it. Particles are evenly spread in these solutions. They can be separated by physical means.
An element is defined as the substance which is made of similar kind of atoms. All the atoms in an element have same atomic number. The atoms cannot be separated by any physical or chemical means.
Compound is defined as a chemical specie which is made by the combination of different atoms. For Example: etc.. The atoms in a compound can be chemically separated.
A mixture is defined as the substance which is made by mixing two or more substances in any ratio. They can be separated by physical means.
Hence, the substance that cannot be separated physically or chemically is an element.
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Answer : The correct option is, (b) +0.799 V
Solution :
The values of standard reduction electrode potential of the cell are:
From the cell representation we conclude that, the hydrogen (H) undergoes oxidation by loss of electrons and thus act as anode. Silver (Ag) undergoes reduction by gain of electrons and thus act as cathode.
The half reaction will be:
Reaction at anode (oxidation) :
Reaction at cathode (reduction) :
The balanced cell reaction will be,
Now we have to calculate the standard electrode potential of the cell.
Therefore, the standard cell potential will be +0.799 V