Answer:
Option c → Tert-butanol
Explanation:
To solve this, you have to apply the concept of colligative property. In this case, freezing point depression.
The formula is:
ΔT = Kf . m . i
When we add particles of a certain solute, temperature of freezing of a solution will be lower thant the pure solvent.
i = Van't Hoff factor (ions particles that are dissolved in the solution)
At this case, the solute is nonvolatile, so i values 1.
ΔT = Difference between fussion T° of pure solvent - fussion T° of solution.
T° fussion paradichlorobenzene = 56 °C
T° fussion water = 0°
T° fussion tert-butanol = 25°
Water has the lowest fussion temperature and the paradichlorobenzene has the highest Kf. But the the terbutanol, has the highest Kf so this solvent will have the largest change in freezing point, when all the molalities are the same.
Answer:
D. Force of attraction between one atom and another atom
Explanation:
Chemical bond is the force of attraction between the atoms, molecules or ions due to which different types of chemical compounds are formed. Based on the types of attractions the bonds have been categorized in the following three categories-
- Ionic bonds - there is electrostatic force of attraction between the charged ions
- Covalent bonds - mutual sharing of the electrons occur
- Metallic bond - here many detached electrons are shared between more than two positively charged ions.
The degree of compactness of a substance
Answer is: <span>main products of the combustion of methane and other fossil fuels are carbon(IV) oxide and water.
</span>Balanced chemical
reaction of combustion of methane:
CH₄ + 2O₂ → CO₂ + 2H₂<span>O.
</span>In this combustion reaction, carbon is oxidized (from -4 to +4 oxidation number) and oxygen is reduced (from 0 to -2 oxidation number).