Download App

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

Gujarat BoardEnglish MediumSTD 12 ScienceChemistryThe d & f Block Elements3 Marks
Question
Answer the following questions:
Compare non transition and transition elements on the basis of their.
  1. Variability of oxidation states.
  2. Stability of oxidation states.
✓

Answer

  1. Oxidation states of transition elements differ from each other by unity. In non-transition elements oxidation states normally differ by a unit of two.
  2. In transition elements higher oxidation states are favoured by heavier elements whereas in non-transition elements lower oxidation state is favoured by heavier elements.

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→Gujarat Board STD 12 Science question papers→Gujarat Board question paper generator→

Similar questions

A copper-silver cell is set up. The copper ion concentration in it is $0.10 M$. The concentration of silver ion is not known. The cell potential measured $0.422 V$. Determine the concentration of silver ion in the cell.
$\text{Given: E}^{o}_{\text{Ag}^{+}/\text{Ag}}=+0.80\text{V},\text{E}^{o}_{\text{Cu}^{2+}/\text{Cu}}=+0.34\text{V}.$
→
Explain the acidic nature of alcohols and phenols by their reaction with metals. $\#\#\# \ '$ Alcohols and phenols are acidic in nature' verify the truth of this statement by a reaction with metals.
→
  1. Write the IUPAC name of the complex $[Cr(NH_3)_4 Cl_2]Cl.$
  2. What type of isomerism is exhibited by the complex $[Co(en)_3]^{3+}?$
$($en$=$ ethane$-1,2-$diamine$)$
  1. Why is $[NiCl_4]^{2–}$ paramagnetic but $[Ni(CO)_4]$ is diamagnetic?
$($At. nos.: $Cr= 24, Co=27, Ni= 28)$
→
The decomposition of $NH_3$ on platinum surface,$\text{2NH}_{3}\text{(g)}\text{ }^{Pt}_\rightarrow\text{N}_{2}\text{(g)}+\text{3H}_{2}\text{(g)}$ is a zero order reaction with k$=\text{2.5}\times\text{10}^{-4}\text{Ms}^{-1}$ . what are the rates of production of $N_2$ and $H_2$?
→
Write the name of monomers and their structures in the following:
  1. Buna-N
  2. PVC
  3. Neoprene
→
The extraction of Au by leaching with $NaCN$ involves both oxidation and reduction. Justify giving equations.
→
Complete the following reactions:
  1. $\text{CH}_{3}\text{CH}_{2}\text{NH}_{2}+\text{CHCl}_{3}+\text{alc. KOH}\rightarrow$
  2. $\text{C}_{6}\text{H}_{5}\text{N}_{2}^{+}\text{Cl}^{-}\xrightarrow[\text{(Room}\text{ temp.)}]{H_2O}$
→
Calculate the amount of $KCl$ which must be added to $1\ kg$ of water so that the freezing point is depressed by $2K.\ (K_f$ for water $= 1.86\ K\ kg\ mol^{–1}).$
→
A green solution of potassium manganate turns purple when $CO_2$ gas is passed through the solution.
→
Outline the principles of refining of metals by the following methods:
Vapour phase refining
→