Download App

Transition and Inner Transition Elements — Chemistry STD 12 Science — Question

Maharashtra BoardEnglish MediumSTD 12 ScienceChemistryTransition and Inner Transition Elements3 Marks
Question
Why $La(OH)_3$ is the strongest base, while $Lu(OH)_3$ is the weakest base?
Write two applications of catalytic properties of transition metals and compounds.
✓

Answer

The strength of a base depends on the availability of hydroxide ions $(OH-)$ for accepting protons $(H+).$ In this case, $La(OH)3$ is considered the strongest base because the $La3+$ ion has a larger ionic radius, making it easier for hydroxide ions to approach and accept protons. On the other hand, $Lu(OH)3$ has a smaller ionic radius for the $Lu3+$ ion, making it harder for hydroxide ions to approach and accept protons, hence making it the weakest base.
Now, let's talk about the catalytic properties of transition metals and compounds! Two applications are:
$1.$ Transition metal catalysts are used in the Haber$-$Bosch process to produce ammonia, an important component in fertilizers.
$2.$ Transition metal catalysts, like platinum, are used in catalytic converters in cars to convert harmful gases into less harmful substances.

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 "Answer the following in brief." from Transition and Inner Transition Elements→Transition and Inner Transition Elements — all question types→Chemistry STD 12 Science question papers→Maharashtra Board STD 12 Science question papers→Maharashtra Board question paper generator→

Similar questions

Fluorine has less negative electron gain affinity than chlorine. Why?
→
What are the common chemical properties of d-block elements?
→
What is metamerism? Write the structure and $\text{IUPAC}$ name of 'methyl$-$n$-$propyl ether.
What is the action of hot $\text{HI}$ on it?
→
The vapour pressures of pure liquids $A$ and $B$ are $400 mm Hg$ and $650 mm Hg$ respectively at $330 K$. Find the composition of liquid and vapour if total vapour pressure of solution is $600 mm$ $Hg$.
→
What is the value of $\Delta S _{\text {surr }}$ for the following reaction at $298 K$ ?
$6 CO _{2( g )}+6 H _2 O _{( l )} \longrightarrow C _6 H _{12} O _{6( s )}+6 O _{2( g )}$
Given that, $\Delta G^0=2879 \ kJ \ mol ^{-1} \Delta S=-210 \ J K ^{-1} \ mol ^{-1}$.
→
Write IUPAC names of

Image

→
Obtain an expression for half-life period of zero order reaction.
→
Explain the classification of polymers on the basis of structures.
→
In acidic solution, sucrose is converted to a mixture of glucose and fructose in pseudo first order reaction. It has been found that the con-centration of sucrose decreased from $20 mmol _{ L ^{-}}$ 1 to $8 mmol L ^{-1}$ in 38 minutes. What is the half-life of the reaction?
→
Derive the relation between molar mass of the solute and boiling point elevation.
→