0.05 moles of ethanoic acid is dissolved in $2 5 0 ~ g m$ benzene. Calculate molality of solution.
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107 questions across 6 question groups — pick any mix to generate a Chemistry paper with step-by-step answer keys.
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6
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2 Marks Questions
14 Q→023 Marks Question
4 Q→031 Marks Question
34 Q→04M.C.Q (1 Marks)
34 Q→055 Marks Questions
9 Q→06Fill in the blank.
12 Q→Sample Questions
Solutions questions
One sample from each question group in this chapter. Select any group above to see the full set with answer keys.
Calculate the mole fraction of gas $A$ is the soltuion made an mixing 0.5 moles of gas $A$ and 4.5 moles of gas B.
View full solution →Define osmosis. Write the name of the method used in desalination of sea-water.
1.25 g of protein is present in 300 mL aqueous solution of a protein. The osmotic pressure of this solution at 300 K was found to be $2.50 \times 10^{-3}$ bar. Calculate the molar mass of protein. $[R=0.083 L$ bar $\operatorname{mol}^{-1} K^{-1}$ ].
View full solution →(i) What are anti-freezing agents?
(ii) What is called de-icing agent?
(ii) What is called de-icing agent?
Calculate the molarity of 250 mL solution made by dissolving 5 g NaOH in water.
A special thermometer (Beckmann thermometer) is used to determine molecular weight by freezing point depression method instead of ordinary thermometer. Why?
Explain negative deviation from Raoult's law with an example.
Explain positive deviation from Raoult's law with an example.
Define saturated solution.
Write names of solute and solvent present in sodium amalgam solution.
Explain the reason for the solution of chloroform and acetone showing negative deviation from Raoult's law.
Why do aquatic animals lives more easily in cold water than in hot water?
In case of swelling in the throat, it is advisable to gargle with normal salt water, why?
The compound with maximum value of van't Hoff factor (i) for complete dissociation of solute in aqueous solution is ;
- AKCl
- BNaCl
- ✓$K _2 SO _4$
- D$MgSO _4$
Answer: C.
View full solution →Which of the following solutions of KCl will have the highest value of molar conductivity?
- A$0,01 M$
- ✓1 M
- C0.5 M
- D0.1 M
Answer: B.
View full solution →The boiling point of an atomic mixture of two liquids when it :
- Ashows negative deviation from Raout's law
- Bforms an ideal solution
- ✓shows positive deviation from Racult's law
- Dis saturated
Answer: C.
View full solution →In which of the following mixtures dipole-dipole attraction is mainly found?
- AKCl and $H _2 O$
- B$C _6 H _6$ and $CCl _4$
- C$C _6 H _6$ and $C _2 H _5 OH$
- ✓
Answer: D.
View full solution →Which formula is not correct for van't Hoff factor?
- A$i=\frac{\Delta T _{ b } \text { (observed) }}{\left.\Delta T _{ b } \text { (calculated }\right)}$
- B$i=\frac{\Pi \text { (observed) }}{\Pi \text { (calculated) }}$
- C$i=\frac{\Delta T _{ f } \text { (observed) }}{\Delta T _{ f } \text { (calculated) }}$
- ✓$i=\frac{\text { Observed molecular weight }}{\text { Calculated molecular weight }}$
Answer: D.
View full solution →Derive formula for degree of dissociation and degree of condensation of the solute in the solvent.
(a) What is reverse osmosis? How is water purified through it? Explain.
(b) Write the applications of osmosis.
(b) Write the applications of osmosis.
How to determine the vapour pressure and total pressure of the components in binary solution of two volatile liquids? Explain their mathematical form and also explain the graph between mole fraction and vapour pressure for an ideal solution.
Prove that boiling point elevation (AT) is proportional to the molality of solute present in the solution. Also find its mathematical form.
Derive a formula to determine the molar mass of a solute by depression of freezing point.
The mathematical form of Henry's Law is ______________ .
The unit of molarity is _________________ .
On increasing pressure _________________ takes place in boiling point.
The value of van't Hoff coefficient for $K _3\left[ Fe ( CN )_6\right]$ is ___________________ .
View full solution →$NaCl , MgCl _2$ and $AlCl _3$ have same molarity __________________ have highest boiling point.
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