Download App

STD 12 - 5. Co-ordination chemistry — JEE STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceJEESTD 12 - 5. Co-ordination chemistry4 Marks
MCQ
Identify the correct trend given below

(Atomic No. $= Ti : 22,$ $Cr : 24$ and  $Mo : 42$ )

  • A
    ${\Delta _0}$ of ${{[Cr{{({{H}_{2}}O)}_{6}}]}^{2+}}>\,{{[Mo{{({{H}_{2}}O)}_{6}}]}^{2+}}$ and ${\Delta _0}$ of ${[Ti{({H_2}O)_6}]^{3 + }} > {[Ti{({H_2}O)_6}]^{2 + }}$
  • B
    ${\Delta _0}$ of ${[Cr{({H_2}O)_6}]^{2 + }} > {[Mo{({H_2}O)_6}]^{2 + }}$ and ${\Delta _0}$ of ${[Ti{({H_2}O)_6}]^{3 + }} < {[Ti{({H_2}O)_6}]^{2 + }}$
  • ✓
    ${\Delta _0}$ of ${[Cr{({H_2}O)_6}]^{2 + }} < {[Mo{({H_2}O)_6}]^{2 + }}$ and ${\Delta _0}$ of ${[Ti{({H_2}O)_6}]^{3 + }} > {[Ti{({H_2}O)_6}]^{2 + }}$
  • D
    ${\Delta _0}$ of ${[Cr{({H_2}O)_6}]^{2 + }} <  {[Mo{({H_2}O)_6}]^{2 + }}$ and ${\Delta _0}$ of ${[Ti{({H_2}O)_6}]^{3 + }} < {[Ti{({H_2}O)_6}]^{2 + }}$
✓

Answer

Correct option: C.
${\Delta _0}$ of ${[Cr{({H_2}O)_6}]^{2 + }} < {[Mo{({H_2}O)_6}]^{2 + }}$ and ${\Delta _0}$ of ${[Ti{({H_2}O)_6}]^{3 + }} > {[Ti{({H_2}O)_6}]^{2 + }}$
c
The splitting is affected by the oxidation state of the central metal ion. A higher oxidation state leads to larger spitting hence.

${\Delta _0}$ of ${{[Ti{{({{H}_{2}}O)}_{6}}]}^{3+}}>$ ${\Delta _0}$ of ${{[Ti{{({{H}_{2}}O)}_{6}}]}^{2+}}$ Further ${\Delta _0}$ also depends of $Z_{eff.}$ and $Z_{eff.}$ of $4d$ series is more than $3d$ series.

Hence

${\Delta _0}$ of  ${{[Cr{{({{H}_{2}}O)}_{6}}]}^{2+}}<$ ${\Delta _0}$ of  $\,{{[Mo{{({{H}_{2}}O)}_{6}}]}^{2+}}$

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

JEE STD 11 Science question papers→Gujarat Board STD 11 Science question papers→Gujarat Board question paper generator→

Similar questions

A gas present in a cylinder, expands against a constant pressure of $1\, atm$ from a volume of $2\, litre$ to a volume of $6\, litre$. In doing so, it absorbs $800\, joule$ heat from surrounding. The change in internal energy of process is.....$ joule$
→
In a chemical reaction $A + 2B \overset K  \rightleftharpoons  2C + D$, the initial concentration of $B$ was $1.5$ times of $A$ but the equilibrium concentrations of $A$ and $B$ were found to be equal. The equilibrium, constant $(K)$ for the aforesaid chemical reaction is
→
Match the compounds given in List $I$ with their characteristic reactions given in List $II.$ Select the correct option.
 List $I$   (Compounds) List $II$   (Reactions)
$A.$ $CH_3(CH_2)_3NH_2$ $(i)$ Alkaline hydrolysis
$B.$ $CH_3C\equiv\,\,CH$ $(ii)$ With KOH (alcohol) and $CHCl_3$ produces bad smell
$C.$ $CH_3CH_2COOCH_3$ $(iii)$ Gives white ppt.with ammoniacal $AgNO_3$
$D.$ $CH_3CH(OH)CH_3$ $(iv)$ With Lucas reagent cloudiness appears after $5$ minutes
→
The correct statement(s) regarding the binary transition metal carbonyl compounds is (are) (Atomic numbers: $Fe =26, Ni =28$ )

$(A)$ Total number of valence shell electrons at metal centre in $Fe ( CO )_5$ or $Ni ( CO )_4$ is $16$

$(B)$ These are predominantly low spin in nature

$(C)$ Metal-carbon bond strengthens when the oxidation state of the metal is lowered

$(D)$ The carbonyl $C - O$ bond weakens when the oxidation state of the metal is increased

→
Product  $(B)$ of the reaction is
→
Tertiary alcohols $(3^\circ )$ having atleast four carbon atoms upon drastic oxidation yield carboxylic acid with
→
The density of water is $1\, g/mL$. What is the volume occupied by $1$ molecule of water :-
→
In the following, which substance will have highest boiling point
→
Consider the following conversions :
$(i)\, O_{(g)} + e^- \to O_{(g)}^- , \Delta H_1$

$(ii)\, F_{(g)} + e^- \to F^-_{(g)}, \Delta H_2$

$(iii)\, Cl_{(g)} + e^- \to Cl_{(g)}, \Delta H_3$

$(iv)\, O_{(g)}^- + e^- \to O_{(g)}^{2-} , \Delta H_4$
That according to given information the incorrect statement is

→
A distinctive and characteristic functional group in fats is
→