The most basic hydroxide from following isA. `Pr(OH)_(3)(Z=59)`B. `Sm( – InterviewSolution

InterviewSolution

1.	The most basic hydroxide from following isA. `Pr(OH)_(3)(Z=59)`B. `Sm(OH)_(3)(Z=62)`C. `Ho(OH)_(3)(Z=67)`D. `La(OH)_(3)(Z=57)`
Answer» Correct Answer - D Due to lanthanoid contraction, the basic character of hydroxides decreases from `La^(3+)` to `Lu^(3+)` As a result, covalent nature of Ln - OH bond also increases. Thus the most basic hydroxide among the gicen option is `La(OH)_(3)`.

Discussion

No Comment Found

Related InterviewSolutions

With which halogen the reactions of alkanes are explosive ?A. FluorineB. ChlorineC. BromineD. Iodine
Excess of ammonia with sodium hypochlorite solution in the presense of gule or gelatin givesA. `NaBH_(2)`B. `NH_(2)NH_(2)`C. `N_(2)`D. `NH_(4)Cl`
Which of the following polymers is used to manufacture clothes for firefighters ?A. ThiokolB. KevlarC. NomexD. Dynel
What is the density of solution of sulphuric acid used as an electrolyte in lead accumulator ?A. `1.5gmL^(-1)`B. `1.2gmL^(-1)`C. `1.8gmL^(-1)`D. `2.0gmL^(-1)`
The most basic hydroxide from following isA. `Pr(OH)_(3)(Z=59)`B. `Sm(OH)_(3)(Z=62)`C. `Ho(OH)_(3)(Z=67)`D. `La(OH)_(3)(Z=57)`
Identify the oxidation states of titinium (Z=22) and copper (Z=29) in their colourless compounds.A. `Ti^(3+),Cu^(2+)`B. `Ti^(2+),Cu^(2+)`C. `Ti^(4+),Cu^(+)`D. `Ti^(4+),Cu^(2+)`
What is the catalyst used for oxidation of `SO_(2)` to `SO_(3)` in lead chamber process for manufacture of sulphuric acid ?A. Nitric oxideB. Nitrous oxideC. Potassium iodideD. Dilute HCl
In which substance does nitrogen exhibit the lowest oxidation state ?A. Nitrogen gasB. AmmoniaC. Nitrous oxideD. Nitric oxide
Which of the following compounds reacts immediately with Lucas reagent ?A. `CH_(3)CH_(2)OH`B. `CH_(3)CH_(2)CH_(2)OH`C. `CH_(3)-underset(OH)underset(|)(CH)-CH_(3)`D. `CH_(3)-underset(OH)underset(|)overset(CH_(3))overset(|)(C)-CH_(3)`
Which among the following metals crystallise as a simple cube ?A. PoloniumB. IronC. CopperD. Gold