Download App

The p-Block Elements — Chemistry STD 12 Science — Question

Gujarat BoardEnglish MediumSTD 12 ScienceChemistryThe p-Block Elements3 Marks
Question
Considering the parameters such as bond dissociation enthalpy, electron gain enthalpy and hydration enthalpy, compare the oxidising power of $F_2$ and $Cl_2.$
✓

Answer

Fluorine is a much stronger oxidizing agent than chlorine. The oxidizing power depends on three factors.
  1. Bond dissociation energy.
  2. Electron gain enthalpy.
  3. Hydration enthalpy.
The electron gain enthalpy of chlorine is more negative than that of fluorine. However, the bond dissociation energy of fluorine is much lesser than that of chlorine. Also, because of its small size, the hydration energy of fluorine is much higher than that of chlorine. Therefore, the latter two factors more than compensate for the less negative electron gain enthalpy of fluorine. Thus, fluorine is a much stronger oxidizing agent than chlorine.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "3 Marks Question" from The p-Block Elements→The p-Block Elements — all question types→Chemistry STD 12 Science question papers→Gujarat Board STD 12 Science question papers→Gujarat Board question paper generator→

Similar questions

In what respect do prontosil and salvarsan resemble. Is there any resemblance between azo dye and prontsil? Explain.
→
Assign reasons for the following:
  1. Phosphorus doped silicon is a semiconductor.
  2. Schottky defect lowers the density of a solid.
  3. Some of the very old glass objects appear slightly milky instead of being transparent.
→
Calculate the electrode potential of copper electrode dipped in 0.1M $CuSO_4$ solution at 298K. Given that $\text{E}^{\circ}_{\text{cu}^{2}+/\text{cu}}=0.34\text{V}.$
→
What product will be formed on reaction of propanal with 2-methylpropanal in the presence of NaOH? What products will be formed? Write the name of the reaction also.
→
Explain why does conductivity of germanium crystals increase on doping with galium.
→
How do enzymes catalyse a chemical reaction in the living system? Explain drug target interaction taking the example of enzyme as target.
→
Define the following terms as related to proteins:
  1. Peptide linkage.
  2. Primary structure.
  3. Denaturation.
→
Benzene and toluene form ideal solution over the entire range of composition. The vapour pressure of pure benzene and naphthalene at $300 K$ are $50.71$ mm Hg and 32.06 mm Hg respectively. Calculate the mole fraction of benzene in vapour phase if $80 g$ of benzene is mixed with $100 g$ of naphthalene.
→
Account for the following:
  1. $PCl_5$ is more covalent than $PCl_3.$
  2. Iron on reaction with HCl forms $FeCl_2$ and not $FeCl_3$
  3. The two $O-O$ bond lengths in the ozone molecule are equal.
→
Write the monomers used for getting the following polymers:
  1. Polyvinyl chloride.
  2. Teflon.
  3. Bakelite.
→