EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 15 - Solutions>KEAM 2019>Q 2

MEDIUM

KEAM

IMPORTANT

Earn 100

Acetic acid dimerises when dissolved in benzene. As a result boiling point of the solution rises by $0.36 ° C,$ when $100 g$ of benzene is mixed with $X g$ of acetic acid. In this solution, if experimentally measured molecular weight of acetic acid is $117.8$ and molar elevation constant of benzene is $2.57 K kg {mol}^{- 1},$ what is the weight $%$ and degree of dissociation (in $%$ ) of acetic acid in benzene?

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Important Questions on Solutions

EASY

KEAM

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 15 - Solutions>KEAM 2018>Q 3

If

1 m o l

of

N a C l

solute is dissolved in

1 k g

of water, at what temperature will water boil at

1.013

bar?

(K_{b} o f w a t e r i s 0.52 K k g m o l^{- 1})

MEDIUM

KEAM

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 15 - Solutions>KEAM 2020>Q 4

When the same amount of the solute

' P'

and

' Q'

are separately dissolved in

500 g

water, the

Δ

T_{f}

values are

0.15 K

and

0.30 K

respectively. If the molecular weight of

{}^{'}P^{'}

is

80 g {mol}^{- 1}

, then the molecular weight of

{}^{'}Q^{'}

is

HARD

KEAM

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 15 - Solutions>KEAM 2018>Q 5

Consider the galvanic cell.

P t_{(S)} | H_{2} (1 bar) | H^{+}_{(a q)} 1 M | | H C l_{(a q)} 1 M | C l_{2} (1 bar) | P t_{(s)}

. After running the cell for sometime, the concentration of the electrolyte is automatically raised to

3 M H C l

. Molar conductivity of the

3 M H C l

is about

240 S c m^{2} m o l^{- 1}

and limiting molar conductivity of

H C l

is about

420 S c m^{2} m o l^{- 1}

. If

K_{b}

of water is

0.52 K k g m o l^{- 1}

, calculate the boiling point of the electrolyte at the end of the experiment