Answer:
London Dispersion Force<span> is the strongest interparticle force in a sample of Kr.
Explanation:
Krypton belongs to Noble Gases. They exists in monoatomic form as they are inert in nature and are very less reactive. So, as there is no polarity in Krypton so it will fail to create either Dipole-Dipole or Hydrogen Bond Interactions between its atoms. While, London Dispersion Forces or Van Der Waals forces can exist between Kr atoms. When Kr atoms approaches one other they create Instantaneous dipole. This</span> Instantaneous dipole induces dipole in second Kr atom and the process starts propagating. Hence, interactions are generated between Kr atoms.
<u>Answer:</u> It repels positive ion and attracts negative ion.
<u>Explanation:</u>
There are 2 types of ions:
1. Cations: These ions are positively charged ions which are formed when a substance looses electrons.
2. Anions: These ions are negatively charged ions which are formed when a substance gains electrons.
It is known that, like charges repel each other and unlike charges attract each other.
As, it is given that the substance is positively charged, so it will attract anion and repel cation.
Answer:
Definition:
Titration is a quantitative technique where solution of known concentration is used to determine the concentration of unkown solution.
Explanation:
Titration is a quantitative technique where solution of known concentration is used to determine the concentration of unkown solution. it is also called titrimetry or volumetric analysis.
Titrant:
The known solution is called titrant. Titrant is prepared from the standard solution of known concentration and volume. It is added from the burette to the analyte.
Analyte:
The substance whose concentration or quantity is to be determine is called analyte. Titrant is carefully added to the analyte to carry out the reaction untill the end point is reached.
Usually the indicator are used to signal the end point.
End point:
It is also called equivalence point. it is the point where indicator shows that the amount of titrant needed to complete the reaction is added to the solution. it is indicated by colour changes during the reaction.
Procedure:
1. The burette is filled with titrant.
2. The flask is filled with the analyte.
3. One drop of indicator is added to the analyte before satrting the titration.
4. Now the titrant is added slowly into the analyte, drop wise until the indicator show the colour which indicate the end point.
5. After the end point is reached, note the burette reading.
6. At the end of titration final calculations can be done.
Types of titration:
Acid-Base titration
Redox titration
The correct answer is D. The solute in this solution is the solid sodium nitrate (NaNO3) which is dissolved in the solvent, the water. Solute is the minor component in a solution whereas the solvent is the major component in the solution.
<u>Answer:</u>
<u>For a:</u> The reaction is a type of synthesis reaction.
<u>For b:</u> The reaction is a type of double displacement reaction
<u>For c:</u> The reaction is a type of combustion reaction.
<u>Explanation:</u>
The given chemical reaction is:
The above reaction is a type of synthesis reaction because calcium and bromine are combining in their elemental state to form a calcium bromide compound.
The given chemical reaction is:
The above reaction is a type of double displacement reaction because here exchange of ions takes place.
The given chemical reaction is:
The above reaction is a type of combustion reaction because a hydrocarbon is reacting with oxygen gas to produce carbon dioxide and water molecule.