Chemistry II - For Class X (Science) - Guess Papers 2026 - BY Sir Sajjad Akber Chandio

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Class X (Science Group)
Chemistry II

Sir Sajjad Akber Chandio

Guess paper 2026

Q.1: Define of following terms?

1. Homologous series
2. Functional Group
3. Alkanes
4. Alkenes
5. Alkynes
6. Isomerism
7. Aliphatic Hydrocarbon
8. Alicyclic Compound
9. pH with example
10. Vitamin + Chat
11. Carbohydrates
12. Molecular Formula
13. Condensed Formula
14. Structural Formula
15. Spectroscopic method
16. Indicators
17. I.U.P.A.C
18. Mobile Phase
19. Volatile compound
20. Stationary Phase
21. Insulin
22. Branches of chemistry

Q.2: Write down difference between the followings?

1. Fat and Oil
2. Reversible and Irreversible
3. Classical and Instrument Method
4. Qualitative and quantitative analysis
5. Primary and secondary Pollutant
6. Monosaccharaides and oligosaccharides
7. Water-soluble vitamin and water insoluble vitamin
8. Troposphere and Stratosphere
9. Soft and Hard water
10. Temporary vs Permanent hardness of Water

Q.3: Write down uses any one of followings?

1. Organic Compound
2. Carbohydrates
3. Protein
4. Lipids

Q.4: State the Acid/Base theories with Limitation of the followings?

1. Arrhenius
2. Bronsted
3. Lewis

Q.5:Define Salt describe its types and uses?
Q.6: Derive the equation Equilibrium Constant K_c
Q.7: Justify the following reasons (Scientific reasons):

• Why silicon compound is lesser than carbon compound.
• Justify that petroleum / petrol is “Black Gold”
• Why water IS SOLVENT / Justify that water is solvent.
• Why is equilibrium dynamic not static?
• Why pure water considered a weak electrolyte?
• Justify that green house effect leads to global warming.
• Justify that the change in the altitude change the temperature of the atmosphere
• Alkanes are said to be saturated hydrocarbons.
• How vegetable oil is converted into ghee?

Q.8: Describe water ionization
Q.9: Describe fractional Distillation of Petroleum with the help of diagram?
Q.10: Write down Properties of Acid and Base?
Q.11: Describe the sources of organic Compound and also the characters of organic compound?
Q.12: Rules Alkanes Alkynes and Alkenes
Q.13: A reaction takes place between iron ion and chloride as:

Fe⁺³ + 4Cl^- ⇄ FeCl^4-

at Equilibrium the concentrations are measured to be (Fe⁺³) is 0.2 mol dm^-3, Cl^- is 0.28 mol.dm^-3 and FeCl₄^- mol.dm^-3 .Calculate equilibrium constant K_c for given reaction.
Q.14: (a) A salt HCl has pH of 2.3. Calculate pOH.
(b) A solution of H₂SO₄ has pH of 1.05. calculate its pOH an [H⁺] Q.15: Define pollutant list type and describe its effect water and noise pollution on our life?
Q.16: Explain Borne Diseases?
Q.17: Define Conductometry and write down its application?
Q.18: Explain Gas Chromatography with the help of diagram?
Q.19: Define Saponification and describe the soap preparation with the help of flow sheet diagram?
Q.20: Explain the process preparation of soft drink?
Q.21: What are the causes of acid rain?
Q.22: Describe beneficial impact of Pharmaceutical industry on human society
Q.23: Characteristics of K_c
Q.24: Define Functional Group and identify the functional groups in the following compounds.

• CH₃–CHO
• CH₃–CH₂–OH
• C₃H₇–COOH

Q.25: Write down condition of the followings predict stage.

1. Q_c = K_c
2. Q_c < K_c
3. Q_c > K_c

Q.26: Define Global warming and write down effect of global warming.
Q.27: Chart:

• Chart alkynes alkanes
• Chart of PH value
• Chart of vitamin

Q.28: Write down Equilibrium Constant Expression (K_c) for the following balanced reversible reactions:

• N₂ + 2O₂ ⇌ 2NO₂
• H₂ + I₂ ⇌ 2HI
• CO₂ + H₂ ⇌ CO + H₂O

Q.29: Complete the following neutralization reactions between acids and bases:

• i) KOH + HNO₃ __________ + __________
• ii) NaOH + HCl __________ + __________
• iii) Ca(OH)₂ + H₂SO₄ __________ + __________

Q.30: Define nucleic acid and write down differences between DNA and RNA also write down its importance Nucleic Acid.
Q.31: How amino acids as a monomer or building block of protein.
Q.32: What is buffer? What is the Composition of buffer? Describe its importance in our daily life?
Q.33: What the material is required for the preparation of sugar? With the help of flow sheet.
Q.34: What is Ozone? How Ozone depletion does occur by Chlorofluorocarbons (CFCs) also mention some adverse impact of it?