At `25^(@)C`, a solution containing `0.2g` of polyisobutylene in `100mL` of benzene develpoed a rise of `2.4mm` at osmotic equilibrium. Calculate the molecular weight of polyisobutylene if the density of solution is `0.88 g// mL`A. `2.39 xx10^(5)g`B. `33.9xx10^(5)g`C. `43.8xx10^(5)g`D. `78.6xx10^(5)g`

At `25^(@)C`, a solution containing `0.2g` of polyisobutylene in `100m

1.	At `25^(@)C`, a solution containing `0.2g` of polyisobutylene in `100mL` of benzene develpoed a rise of `2.4mm` at osmotic equilibrium. Calculate the molecular weight of polyisobutylene if the density of solution is `0.88 g// mL`A. `2.39 xx10^(5)g`B. `33.9xx10^(5)g`C. `43.8xx10^(5)g`D. `78.6xx10^(5)g`
Answer» Correct Answer - 1 Height developed `=2.4mm` Osmotic pressure `=h.d.g.=(2.4)/(10)xx0.88xx981=207.187`dyne`cm^(-2)` Now `piv=nRTrArr207.187xx100=(0.2)/(m)xx8.314xx10^&(7)xx298" "(R` in erg,V in mL, using CGS system) `m=2.39xx10^(5)`

Discussion

No Comment Found

Related InterviewSolutions

When `250 mg` of eugenol is added to `100 g` of camphor `(k_(f)=39.7" molality"^(-1))`, it lowered the freezing point by `0.62^(@)C` . The molar of eugenol is `:`A. `1.6xx10^(2) g//mol`B. `1.6xx10^(4)g//mol`C. `1.6xx10^(3)g//mol`D. `200g//mol`
Depression of freezing point of which of the following solutions does represent the cryoscopic constant of water?A. `6%` by mass of urea in aqueous solutionB. `100g` of aqueous solution containing `18g` of glucoseC. `59g` of aqueous solution containing `9g` of glucoseD. `1M KCl` solution in water.
Depression of freezing point of which of the following solutions does represent the cryoscopic constant of water ?A. `6%` by mass of urea is aqueous solutionB. `100g` of aqueous solution containing `18g` of glucoseC. `1M KCl` solution in waterD. `59g` of aqueous solution containing `9g` of glucose
A `5%` solution of cane sugar (molecular weight =`342`) is isotonic with a `1%` solution of substance `X`. The molecular weight of `X` isA. `34.2`B. `171.2`C. `68.4`D. `136.8`
An aqueous solution of a solute AB has b.p. of `101.08^(@)C( AB` is `100%` ionised at boiling point of the solution ) and freezes at `-1.80 ^(@)C`. Hence, `AB(K_(b)//K_(f)=0.3)`A. is `100%` ionised at the `f.p.` of the solutionB. behaves as non`-` electrolyte at the `f.p.` of the solutionC. forms dimerD. none of the above
`106.2g` 1 molal aqueous solutio of ethylene glycol is cooled to `-3.72^(@)C`. Mass of of ice separated during cooling is `(K_(f0` water `=1.86` freezing point of water `=0^(@)C )`A. `25g`B. `50g`C. `60g`D. `40g`
At `25^(@)C`, a solution containing `0.2g` of polyisobutylene in `100mL` of benzene develpoed a rise of `2.4mm` at osmotic equilibrium. Calculate the molecular weight of polyisobutylene if the density of solution is `0.88 g// mL`A. `2.39 xx10^(5)g`B. `33.9xx10^(5)g`C. `43.8xx10^(5)g`D. `78.6xx10^(5)g`
An aqueous solution containing `21.6 mg` at a solute in `100 ml` of solution has an osmotic pressure of `3.70 mm` of `Hg` at `25^(@)C`. The molecular wt of solute in `g//mol` isA. 1085B. 9035C. 1355D. 700
The Vapour pressure of solution containing `2g` of `NaCl` in `100g` of water at `100^(@)C` is `753.2mm` of `Hg`, then degree of dissociation of `NaCl`.A. `0.6`B. `0.7`C. `0.8`D. `0.9`
What weight of glucose dissolved in `100g` of water will produce the same lowering of vapour pressure as one gram of urea dissolved in `50g` of water at the same temperatureA. `3g`B. `5g`C. `6g`D. `4g`

Discussion

No Comment Found

Related InterviewSolutions

Reply to Comment