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Class 10 Chemistry Chapter 18 Salts Test 2 – Full unit

Class 10 Chemistry Chapter 18 Salts Full Unit Test 2

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Class 10 Chemistry Chapter 18 Salts Full Unit Test 2 – Punjab Board 2027

Are you looking for Class 10 Chemistry Chapter 18 Salts Test 2 for your upcoming Punjab Board Annual Examination 2027? Here is an excellent opportunity to practise the complete Salts chapter through an examination-oriented Chemistry full-unit test. This test is part of the Class 10 Chemistry Chapter-Wise Test Series 2026-27 available at 786Times.com.

The Class 10 Chemistry Full Unit Test 2 is designed according to the new syllabus issued by PECTAA Punjab. It helps matric students revise important Chemistry concepts, practise objective and subjective questions, and evaluate their preparation for the annual board examination.

📘 Class 10 Chemistry – Important Study Material

Chapter: 18 – Salts
Test: Full Unit Test 2
Subject: Chemistry
Class: 10th / Matric
Academic Session: 2026-27
Preparation: Punjab Board Annual Examination 2027

Class 10 Chemistry Chapter 18 – Salts Full Unit Test 2

Chapter 18, Salts, is an important chapter in the Class 10 Chemistry textbook. It explains the formation, properties, solubility, crystal structure, and preparation of different salts. Students need a clear understanding of these concepts to solve MCQs, short questions, and detailed questions in their board examinations.

This Chemistry Chapter 18 Test 2 covers important textbook concepts and examination-style questions. Students can attempt the objective and subjective portions to check their understanding of the complete unit.

Objective Type MCQs – Chemistry Chapter 18

The objective portion of this full-unit test contains important multiple-choice questions from the Salts chapter. These MCQs help students revise important definitions, chemical reactions, ionic compounds, and methods of salt preparation.

Important MCQ Topics Include:
  • Products of acid-base neutralization reactions.
  • Arrangement of sodium and chloride ions in NaCl.
  • Electrostatic forces between oppositely charged ions.
  • Factors affecting the solubility of salts.
  • Solubility of sulphates in water.
  • Methods used for the preparation of soluble salts.
  • Uses of copper sulphate (CuSO₄).
  • Filtration and crystallization processes.

Subjective Questions – Important Short Questions

The subjective portion of Class 10 Chemistry Salts Test 2 includes important short questions with answers. These questions are useful for classroom tests, school assessments, revision, and Punjab Board examination preparation.

Students can practise questions related to the definition of salts, crystal lattice structures, ionic bonding, melting points, strong electrolytes, and the solubility rules of different salts.

Important Short Question Topics:
  • What is a salt?
  • Describe the arrangement of ions in sodium chloride.
  • Why do ionic compounds have high melting points?
  • Why do ionic compounds not conduct electricity in solid state?
  • What is meant by a strong electrolyte?
  • Which salts are always soluble in water?
  • How are soluble salts prepared?
  • Why are crystals washed with cold distilled water?
  • Why is slow cooling important during crystallization?

Methods of Preparation of Soluble Salts

The preparation of soluble salts is an important topic in Chapter 18. Students should understand the two main laboratory methods used for preparing soluble salts.

1. Acid and Excess Insoluble Base Method: An acid reacts with an excess of an insoluble base. The unreacted base is removed through filtration. The resulting solution is then concentrated and cooled to obtain salt crystals.

2. Titration Method: This method is used when both the acid and alkali are soluble in water. An indicator helps identify the neutralization point. The salt solution is then concentrated and crystallized.

Important Chemical Reaction:

NaOH + HCl → NaCl + H₂O

Sodium hydroxide reacts with hydrochloric acid to produce sodium chloride and water. This is an example of a neutralization reaction.

Important Concepts for Punjab Board Chemistry Examination 2027

For better preparation, students should revise the following concepts from the Salts chapter:

  • Formation and properties of salts.
  • Neutralization reactions and their products.
  • Crystal lattice of sodium chloride.
  • Electrostatic attraction between ions.
  • Melting points of ionic compounds.
  • Strong electrolytes and electrical conductivity.
  • Solubility rules of different salts.
  • Preparation of soluble and insoluble salts.
  • Filtration, evaporation, and crystallization.
  • Laboratory preparation of potassium nitrate and other salts.

Why Practise Class 10 Chemistry Full Unit Tests?

Regular practice with chapter-wise Chemistry tests can help students understand difficult concepts and improve their examination preparation. Full-unit tests also provide an opportunity to revise the complete chapter instead of studying individual topics separately.

Benefits of Attempting This Test:
  • Improve Chemistry subject knowledge.
  • Practise important MCQs and short questions.
  • Understand important chemical reactions.
  • Improve question-solving skills.
  • Identify topics that require additional revision.
  • Prepare for Class 10 Punjab Board Annual Examination 2027.

Attempt Class 10 Chemistry Chapter 18 Test 2 Online

Students can visit the following page to attempt Chemistry Chapter 18 Salts Full Unit Test 2. Read every question carefully and try to solve the objective and subjective portions independently.

Attempt Full Unit Test 2 →

More Class 10 Chemistry Chapter 18 Tests

Continue your examination preparation with additional Class 10 Chemistry Chapter 18 Salts chapter-wise tests. Practising multiple test papers can help you revise the complete unit and strengthen your understanding of important topics.

Punjab Board 2027 Model Papers and Study Resources

786Times.com provides educational resources for students preparing for Punjab Board examinations. Students can explore Class 10 Chemistry model papers, chapter-wise test series, important MCQs, solved short questions, pairing schemes, and other examination preparation materials for the 2026-27 academic session.

Stay connected with 786Times.com for the latest School Education Department updates, educational news, examination notifications, and Punjab Board 2027 model papers.

Class 10 Chemistry Chapter 18 Salts Full Unit Test 2 Punjab Board 2027 PECTAA Punjab Chemistry MCQs Matric Model Papers
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Prepare for your matric Chemistry examination with the Class 10 Chemistry Chapter 18: Salts – Class Test 2 (Full Unit Test), part of the Punjab Board 2027 Model Papers and Chapter-Wise Test Series. Designed for students following the new Class 10 Chemistry syllabus issued by PECTAA Punjab, this full-unit test helps students revise important concepts, practise examination-style questions, and assess their understanding of the Salts chapter. Use this Class 10 Chemistry Chapter 18 test for effective revision, self-assessment, and board examination preparation. Visit 786Times.com for more Punjab Board 2027 Model Papers, chapter-wise Chemistry tests, and educational resources to support your matric examination preparation.

CHEMISTRYCHAPTER-18 (OBJECTIVE)CLASS TEST-2
TIME: 10 MINTOTAL MARKS: 30MARKS: 8
1. When an acid reacts with a base, it form:(Q-1)
(a) Salt and hydrogen(b) Salt and oxygen(c) Salt and water(d) Acid and water
✔ Answer: (c) Salt and water
2. Each sodium ion is surrounded by chloride ions is:(Q-6)
(a) Four(b) Five(c) Six(d) Eight
✔ Answer: (c) Six (each Na+ is surrounded by 6 Cl−)
3. A large amount of energy is required to melt ionic compounds due to:(Q-9)
(a) covalent bonding(b) hydrogen bonding(c) electrostatic attraction between ions(d) metallic bonding
✔ Answer: (c) electrostatic attraction between ions
4. The factor affects the solubility of a salt is:(Q-14)
(a) Colour of salt(b) Nature of salt(c) Shape of crystal(d) Density only
✔ Answer: (b) Nature of salt
5. Sulfates of which metals are insoluble in water?(Q-18)
(a) Sodium and potassium(b) Barium and lead(c) Ammonium and calcium(d) Magnesium and zinc
✔ Answer: (b) Barium and lead (BaSO4, PbSO4)
6. Soluble salts are prepared mainly by using:(Q-20)
(a) One method(b) Two methods(c) Three methods(d) Four methods
✔ Answer: (b) Two methods
7. Copper sulphate is commonly used as:(Q-24)
(a) fertilizer(b) fungicide(c) fuel(d) disinfectant
✔ Answer: (b) fungicide (CuSO4)
8. Excess insoluble base or metal is removed by:(Q-26)
(a) Evaporation(b) Distillation(c) Filtration(d) Crystallization
✔ Answer: (c) Filtration
9. Which step is used to remove excess base or metal?(Q-28)
(a) Evaporation(b) Filtration(c) Crystallization(d) Cooling
✔ Answer: (b) Filtration
10. Which process is used to remove excess zinc metal?(Q-30)
(a) Evaporation(b) Cooling(c) Filtration(d) Crystallization
✔ Answer: (c) Filtration
786Times — Chemistry Chapter-18 (Objective)
CHEMISTRYCHAPTER-18 (SUBJECTIVE)CLASS TEST-2
TIME: 22 MINMARKS: 20
Attempt any 10 Questions.    10 × 2 = 20
i. What is a salt?(Q-2)
Ans: A salt is an ionic compound formed when the hydrogen of an acid is replaced by a metal (or ammonium) ion. Example: NaCl.
ii. Write the arrangement of ions in sodium chloride (NaCl).(Q-5)
Ans: NaCl forms a giant cubic lattice. Each Na+ ion is surrounded by six Cl− ions, and each Cl− ion is surrounded by six Na+ ions (6 : 6 arrangement). Na⁺ Cl⁻Cl⁻ Cl⁻Cl⁻ Cl⁻Cl⁻ Na⁺ ion Cl⁻ ion Coordination 6 : 6
iii. Why was common salt valuable in the past?(Q-7)
Ans: It was scarce and hard to obtain, and it was the main food preserver (meat and fish) before refrigeration, so it was traded like money and even given as wages.
iv. Why do ionic compounds have high melting points?(Q-8)
Ans: Oppositely charged ions in the giant lattice are held by very strong electrostatic forces of attraction. A large amount of energy is needed to break them.
v. How do ionic charge and ion size affect melting point?(Q-11)
Ans: Higher ionic charge and smaller ion size give stronger attraction between ions, so the melting point is higher. Example: MgO (Mg2+, O2−) melts higher than NaCl (Na+, Cl−).
vi. Why do ionic compounds not conduct electricity in solid state?(Q-12)
Ans: In the solid state the ions are fixed in the lattice and cannot move, so there are no free charge carriers.
vii. What is meant by a strong electrolyte? Give example.(Q-14)
Ans: A substance that ionizes completely in water (or when molten) and conducts electricity well. Examples: NaCl, HCl, NaOH.
viii. Which salts are always soluble in water?(Q-16)
Ans: All sodium, potassium and ammonium salts, and all nitrates.
ix. Write the names of two insoluble chlorides and sulphates.(Q-18)
Ans: Insoluble chlorides: silver chloride (AgCl), lead chloride (PbCl2).
Insoluble sulphates: barium sulphate (BaSO4), lead sulphate (PbSO4).
x. Name the two methods used for the preparation of soluble salts.(Q-20)
Ans: (1) Acid + excess insoluble base / metal / carbonate, then filtration.
(2) Acid + soluble alkali (titration method).
xi. How soluble KNO3 can prepare?(Q-22)
Ans: By titration of KOH (alkali) with HNO3 using an indicator, then evaporating and crystallizing the solution.
KOH + HNO3 → KNO3 + H2O
xii. Why is the solution cooled slowly during crystallization?(Q-25)
Ans: Slow cooling gives large, well-shaped crystals; fast cooling gives small, impure crystals.
xiii. Why are crystals washed with cold distilled water?(Q-27)
Ans: To remove soluble impurities from the surface. Cold water is used so the crystals do not dissolve.
xiv. Why is constant stirring done during the reaction?(Q-29)
Ans: To mix the reactants well, speed up the reaction and make sure all the acid reacts evenly.
786Times — Chemistry Chapter-18 (Subjective)
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