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Ionic mobility of which of the following alkali metal ions is lowest when aqueous solution of their salts are put under an electric field?
Options:
  1. Li
  2. Na
  3. K
  4. Rb

Abhishek Mutneja , 7 Years ago
Grade 12
anser 3 Answers
J kar

Last Activity: 7 Years ago

I have the same ques . Pl answer early so that I can challange cbse neet 2017. Cbse give ans as Rb. But aakash, allen, resonance give ans Li. Which is correct?

Shlok Agrawal

Last Activity: 7 Years ago

YES ! Challenge it  Lithium is correct answer. to this question ,cbse has given wrong answer.. i have attempted the same and answered lithium.,

saimah

Last Activity: 7 Years ago

yes, i have the same concern.

The mobility of ions and conductivity in aqueous solution are inversely proportional to the size of hydrated ions.

So among alkali metal ions lithium has lowest mobility.

The mobility of ions decrease in the order given below.

Cs + > Rb+ > K+> Na+ > Li+

 

 did anyone challenge in cbse ? today 5pm is the last date . 

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