Download App

The d & f Block Elements — Chemistry STD 12 Science — Question

Rajasthan BoardEnglish MediumSTD 12 ScienceChemistryThe d & f Block Elements3 Marks
Question
The halides of transition elements become more covalent with increasing oxidation state of the metal.
✓

Answer

As the oxidation state increases, size of the ion of transition element decreases. As per Fajan's rule, as the size of metal ion decreases, covalent character of the bond formed increases.

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 d & f Block Elements→The d & f Block Elements — all question types→Chemistry STD 12 Science question papers→Rajasthan Board STD 12 Science question papers→Rajasthan Board question paper generator→

Similar questions

Calculate the molarity of 250 mL solution made by dissolving 5 g NaOH in water.
→
Why can we not determine the order of a reaction by taking into consideration the balanced chemical equation?
→
Lanthanum, gadolinium and lutetium are extraordinarily stable in $+3$ oxidation state. Explain. $($Atomic number$: La = 57, Gd = 64, Lu = 71)$
→
  1. Draw the structures of all isomeric alcohols of molecular formula $\ce{C_5H_{12}O}$ and give their $\ce{IUPAC}$ names.
  2. Classify the isomers of alcohols in question $11.3 (i)$ as primary, secondary and tertiary alcohols.
→
Account for the following:
  1. $CuCl_2$ is more stable than $Cu_2Cl_2.$
  2. Atomic radii of $4d$ and $5d$ series elements are nearly same.
  3. Hydrochloric acid is not used in permanganate titrations.
→
Draw the structures of the following derivatives:
  1. The 2,4-Dinitrophenylhydrazone of benzaldehyde.
  2. Acetaldehyde dimethyl acetal.
  3. Cyclopropanone oxime.
→
What happens when bromine reacts with $\text{CH}_3-\text{C}\equiv\text{CH}?$ How would you justify this reaction?
→
When a steady current of $2A$ was passed through two electrolytic cells $A$ and $B$ containing electrolytes $ZnSO_4$ and $CuSO_4$ connected in series, $2g$ of $Cu$ were deposited at the cathode of cell $B.$ How long did the current flow? What mass of $Zn$ was deposited at cathode of cell $A$?
$[$Atomic mass: $Cu = 63.5 g \text{mol}^-¹, Zn = 65 \text{ g mol}^{-1}; 1F = 96500\  C \text{ mol}^-¹]$
→
How would you account for the following? 
  1. Many of the transition elements are known to form interstitial compounds.
  2. The metallic radii of the third (5d) series of transition metals are virtually the same as those of the corresponding group members of the second (4d) series.
  3. Lanthanoids form primarily +3 ions, while the actinoids usually have higher oxidation states in their compounds, +4 or even +6 being typical.
→
The following data were obtained during the first order thermal decomposition of $\ce{SO2Cl2}$ at a constant volume.
$\ce{SO2Cl2 (g) \rightarrow SO2 (g) + Cl2 (g)}$
Experiment $\ce{Time/s}^{-1}$ $\ce{Total pressure/atm}$
$1$ $0$ $0.5$
$2$ $100$ $0.6$
Calculate the rate of the reaction when total pressure is $0.65\ \ce{atm}.$
→