Chemistry Ch 9 Class 11 Solutions

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Chemistry Chapter 9 – Solutions (Class 11) for FSC, Entry Tests & NTS Preparation

Chapter 9, Solutions, is an important topic for Class 11 students preparing for FSC board exams and medical/engineering entry tests like MDCAT, NUMS, AKU, NUST, ECAT, and NTS exams. This chapter explains the formation, properties, and behavior of solutions, including factors that affect solubility and concentration. Understanding solutions is essential for studying colligative properties, chemical reactions in solution, and practical applications in chemistry.

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The osmotic pressure of equimolar solutions of BaCl2, NaCl and sucrose will be in the order:

NUMS 2016
Chemistry
Solution and Colloids
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Which statement is correct?

PMC Sample 3
Chemistry
Solution and Colloids
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Ca(OH)2 is sparingly soluble having solubility value 6.5 x 10-6. What’ll be its solubility:

UHS 2017 Reconduct
Chemistry
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The aqueous solution of which of the following electrolyte will conduct electric current to large extent:

ETEA 2018
Chemistry
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The pH of a solution can be kept constant by:

2022 PMC Test 2
Chemistry
Solution and Colloids
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12% W/W alcohol In water solution contains water:

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For a chemical reaction to occur, particles that collide should:

PMC 2021 Tested
Chemistry
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Boiling point constants help us to determine:

UHS 2012
Chemistry
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The amount of solute present in the given amount of solvent is called:

NTS 2017
Chemistry
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The reaction in which a molecule is broken down by Water is known as

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An ideal solvent dissolves maximum solute at?

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At 25 C, the equivalent conductance at infinite dilution of HCl solution is 425 ohm 1 cm 2 Equiv 1 while its specific conductance is 3.825 ohm 1 cm 1. If the apparent degree of dissociation is 90%, the normality of the solution is:

NUMS 2016
Chemistry
Solution and Colloids
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The oxidation state of Cl in HClO4 is:

NTS 2019
Chemistry
Solution and Colloids
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Colligative Properties depend upon: a

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Lowering of vapor pressure Is directly proportional to: a)

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Aqueous solutions of Iodine and Sodium hydroxide were mixed in a round bottom flask at 70 C. Following chemical reaction was carried out.

3I2 + 6 NaOH -> NaIO3 + NaI + H2O
This reaction is termed as;

UHS 2019
Chemistry
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Buffer solutions resist change in their?

PMC Practice 6
Chemistry
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Which of the following Is the smallest unit?

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The properties of liquid crystals are intermediate b/w crystals and

PMC Sample 3
Chemistry
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Which one is the correct formula for molar mass of solute In case of boiling point elevation? x

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An azeotropic mixture of two liquids has a boiling point higher than either of them when it:

NUMS 2016
Chemistry
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The number of moles of solute dissolved per liter of solution is called:

NTS 2012
Chemistry
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The formula of Plaster of Paris is:

NTS 2017
Chemistry
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For colligative properties, the solution should be:

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Lowering of vapor pressure is directly proportional to?

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The value of surface tension of isopropyl alcohol is?

NUMS 2017
Chemistry
Solution and Colloids
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Which one of the following statements is incorrect?

NUMS 2018
Chemistry
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Molal freezing point constant of water is:

UHS 2013
Chemistry
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Which of the following concentration unit is temperature dependent

ETEA 2019
Chemistry
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The vapour pressure of water at room temperature is 23.8 mm Hg. The vapour pressure of an aqueous solution of sucrose with mole fraction 0.2 is equal to:

NUMS 2015
Chemistry
Stoichiometry
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Human blood maintains its pH between

UHS 2016
Chemistry
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As the number of solute particles increases, the freezing point of the solution:

UHS 2012
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The oxidation state of Cl in HClO4 is:

NTS 2019
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Percentage of weight of NaCI if 2g NaCI is dissolved in 18g water

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The number of moles of solute dissolved per dm) of the solution is called

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What is the molality of 92 g toluene In 250 g benzene?

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Colloidal particles can be separated by using:

ETEA 2017
Chemistry
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The elevation in boiling point ∆?? is equal to ebullioscopic constant ?? when the Molarity (?) of the solution is:

ETEA 2018
Chemistry
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Mole fraction of any compound is the ratio of moles of all components in a:

UHS 2011
Chemistry
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The solubility product for BaSO4 , at 18-25°C is:

NTS 2015 DUHS and JSMU
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In depression of freezing point, freezing constant Is divided by

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6 g of urea is dissolved in 90 g of water. The relative lowering of vapour pressure is:

NUMS 2015
Chemistry
Solution and Colloids
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Definition of Raoult’s law is,

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If NaCl produced in the equation:

FeCl3+ NaOH → Fe(OH)3 + NaCl

175.5 g of NaCl was dissolved in water to make a liter of solution, the molarity would be:

NTS 2010
Chemistry
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Molarity is defined as the number of moles of any substance dissolved:

UHS 2011
Chemistry
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If 18.0 g of glucose is dissolved in 1 kg of water, boiling point of this solution should be:

UHS 2013
Chemistry
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The temperature at which one crystalline form changes to other is called ___ temperature

PMC Sample 3
Chemistry
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Which of the following has the highest electrical conductivity?

NUMS 2016
Chemistry
Solution and Colloids
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From a mixture of CO2and H2gases, CO2can be separated by passing the mixture through:

NTS 2013
Chemistry
Solution and Colloids
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Elevation of the boiling point is a ____ property.

PMC 2021 Tested
Chemistry
Solution and Colloids
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0.5 molar solution NaOH contains:

NUMS 2020
Chemistry
Solution and Colloids
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The compound with more than 10% solubility in pure water is:

ETEA 2018
Chemistry
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Key Concepts about Solutions

The chapter explains types of solutions, solubility, and concentration expressions such as molarity, molality, mole fraction, and percentage composition. It covers Raoult’s law, vapor pressure lowering, osmotic pressure, and colligative properties. The chapter also discusses factors affecting solubility, ideal and non-ideal solutions, and practical applications in chemistry and industry. Each concept is illustrated with examples, diagrams, and step-by-step problem-solving methods. These concepts are highly important for FSC board exams and entry tests like MDCAT, NUMS, AKU, NUST, and ECAT.

Free Entry Test Preparation

Mastery of solutions helps students understand solution behavior, solve numerical problems, and apply concepts to chemical and industrial processes. PLS Academy provides practice questions, solved past papers, and chapter-wise MCQs to help students revise these topics effectively. Regular study of this chapter improves problem-solving skills, conceptual clarity, and exam performance, ensuring students are well-prepared for FSC board exams, competitive entry tests, and NTS exams.

JazakAllah.

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