Answer:
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Explanation:
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B) 2NaCl + F2 → 2NaF + Cl2
C) 2AlBr3 + 3K2SO4 → 6KBr + Al2(SO4)3
D) 2K + MgBr2 → 2KBr + Mg
Answer:
The correct answer is option C.
Explanation:
Double displacement reaction is defined as the reaction in which exchange of ions takes place to give a product.
Single displacement reaction is defined as the reaction in which more reactive element displaces a less reactive element from its chemical reaction.
From all the given options the reaction which is classified as Double displacement reaction is :
Where as other reactions are the examples of Single displacement reaction.
Element’s oxidation number decrease that because that element has received electrons from another element
Explanation:
a reduction in oxidation state is known as a reduction. Such reactions include the formal removal of electrons: a net gain in electrons moving a reduction, and a clear loss of electrons being an oxidation.
An oxidation-reduction (redox) reaction is a type of synthetic reaction that involves a transfer of particles between two species. An oxidation-reduction reaction is any synthetic reaction in which the oxidation number of a molecule, atom, or ion quarters by winning or missing an electron.
the least dense planet in the solar system
B.
the largest, most massive planet
C.
rotates on an axis tilted entirely sideways
D.
the most distant planet from the sun
B. Higher
Lower Temperature
The boiling point is defined as the temperature at which the vapor pressure of a given liquid becomes equal to the external pressure or atmospheric pressure. Boiling point is mainly effected by following factors:
1) Inter-Molecular Interactions:
Greater the intermolecular interactions greater will be the boiling point because more energy is required to overcome these intermolecular interactions.
Example:
Water = 100 °C
Diethyl ether = 34.5 °C
Water requires more energy because it contains hydrogen bond interactions which are considered the strongest intermolecular interactions. While, Diethyl ether lacks Hydrogen bondings.
2) External Pressure:
The boiling point also varies with changing the external pressure for the same solvent. Greater the external pressure greater will be the boiling points and vice versa.
Example:
Water:
External Pressure Boiling Point
1 atm 100 °C
0.921 atm 98 °C
0.425 atm 72 °C