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Indian Navy AA (Artificer Apprentice) Solutions — practice questions

Explore 14 free Solutions questions in Indian Navy AA (Artificer Apprentice) Chemistry. Open each question or exercise to read its content, reference answers and available explanation.

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Solutions questions and exercises with answers

Showing questions 1–14 of 14.

Colligative properties depend on:Read the answer and worked solution →Molality of a solution does not depend on:Read the answer and worked solution →Complete the two concentration definitionsRead the answer and worked solution →Molarity or molality?Read the answer and worked solution →True or false: concentrationRead the answer and worked solution →Naming the measureRead the answer and worked solution →Complete the meaning of colligativeRead the answer and worked solution →True or false: colligative propertiesRead the answer and worked solution →Tap every statement true of molalityRead the answer and worked solution →Assertion and reasonRead the answer and worked solution →Two are true, one is notRead the answer and worked solution →Three of these are wrong. Find the one that holds.Read the answer and worked solution →Flip and pair: measure with its denominatorRead the answer and worked solution →Spot the one that does not belongRead the answer and worked solution →

Worked practice questions

Colligative properties depend on:

  1. Mass of solute only
  2. Temperature only
  3. Nature of solute
  4. NUMBER of solute particles, not their nature
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Correct answer: D. NUMBER of solute particles, not their nature

Colligative properties (BP elevation, FP depression, osmotic pressure, vapour pressure lowering) depend only on the NUMBER of dissolved particles per unit solvent, not the chemical identity. (Ionic solutes give more particles via dissociation.)

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Molality of a solution does not depend on:

  1. Molar mass of solute
  2. Mass of solute
  3. TEMPERATURE
  4. Mass of solvent
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Correct answer: C. TEMPERATURE

Molality = moles solute / kg solvent. Mass does not change with temperature. Volume does. So molarity changes with T, but molality does not. This is why molality is preferred for colligative property calculations.

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Complete the two concentration definitions

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Missing parts
  1. Answer
    solution
    Choices
    1. solution
    2. solvent
    3. solute
  2. Answer
    solvent
    Choices
    1. solvent
    2. solution
    3. solute
Complete the statement
Molarity is the number of moles of solute in one litre of {0}. Molality is the number of moles of solute per kilogram of {1}.
One word separates them: solution against solvent. Source: syllabus Chemistry, Ch 1 Solutions.

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