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

Similar questions

An organic compound ‘A’ (C3H4) on hydration in presence of H2SO4/ HgSO4 gives compound ‘B’ (C3H6O). Compound ‘B’ gives white crystalline product (D) with sodium hydrogensulphite. It gives negative Tollens’ test and positive iodoform’s test. On drastic oxidation ‘B’ gives compound ‘C’ (C2H4O2) along with formic acid. Identify compounds ‘A’, ‘B’ and ‘C’ and explain all the reactions.
An optically active amino acid (A) can exist in three forms depending on the pH of the medium. The molecular formula of (A) is C3H7NO2.
  1. Write the structure of compound (A) in aqueous medium. What are such ions called?
  2. In which medium will the cationic form of compound (A) exist?
  3. In alkaline medium, towards which electrode will the compound (A) migrate in electric field?
Give reasons:
  1. Mn shows the highest oxidation state of +7 with oxygen but with fluorine it shows the highest oxidation state of +4.
  2. Transition metals show variable oxidation states.
  3. Actinoids show irregularities in their electronic configurations.
Predict the order of reactivity of the following compounds in SN1 and SN2 reactions:
C6H5CH2Br, C6H5CH(C6H5)Br, C6H5CH(CH3)Br, C6H5C(CH3)(C6H5)Br.
How are the following conversions carried out?
Propanol to propan-2-ol
Write the reaction of methyl amine with the following :
(i) $HAuCl _4$
(ii) $H _2 PtCl _6$
(iii) $CH _3 COCl$
(iv) $C _6 H _5 COCl$
Illustrate with examples the limitations of Williamson synthesis for the preparation of certain types of ethers.
Determine the value of equilibrium constant (Kc) and $\Delta G^\theta$ for the following reaction. $\begin{array}{l}N i(s)+2 A g^{+}(a q) \rightarrow N i^{2+}(a q)+2 A g(s) \\ E^\theta=1.05 V\left(1 F=96500 C mol^{-1}\right)\end{array}$
$^{238}_{92}\text{U}$ Change to $^{206}_{92}\text{Pb}$ by successive radioactive decay. A sample of urenium ore was anlaysed and found to contain 1.0 g of $^{238}\text{U}$ and 0.1 g of $^{206}\text{Pb}$ had accumulated due to decay of $^{238}\text{U}$, find out the age of ore. (Half- life of $^{238}\text{U}$$= 4.5\times10^9$ years).
Predict the major product formed when HCl is added to isobutylene. Explain the mechanism involved.