CBSE CLASS 10 CHEMISTRY MODEL PAPER 2026: CRACK THE CODE

 Chemistry is often considered the most logical and scoring part of the Science paper. For the CBSE 10 class board exam 2026, the board is emphasizing "real-world application." This means you won't just be asked to define a reaction—you'll be asked to predict the results of an experiment.

This model paper covers the critical weightage areas: Chemical Reactions, Acids/Bases, Metals, and Carbon Compounds.

SECTION A: OBJECTIVE TYPE QUESTIONS (1 MARK EACH)

Q1. A student adds iron filings to a test tube containing blue copper sulfate solution. After 30 minutes, the color of the solution changes to:

(a) Pale green

(b) Colorless

(c) Yellow

(d) Remains blue

Q2. Which of the following is the correct structural formula for Ethanoic Acid?

(a) $CH_{3}CH_{2}OH$

(b) $CH_{3}CHO$

(c) $CH_{3}COOH$

(d) $HCOOH$

Q3. Assertion (A): The aqueous solution of glucose and alcohol do not show acidic character.

Reason (R): They do not dissociate in water to produce $H^{+}$ ions.

(a) Both A and R are true and R is the correct explanation of A.

(b) Both A and R are true but R is not the correct explanation of A.

(c) A is true but R is false.

(d) A is false but R is true.

Q4. A metal 'X' is used in the thermite process. When 'X' reacts with oxygen, it forms an amphoteric oxide. Identify 'X'.

(a) Sodium

(b) Aluminum

(c) Iron

(d) Copper

SECTION B: VERY SHORT ANSWER QUESTIONS (2 MARKS EACH)

Q5. Why is respiration considered an exothermic reaction? Write the chemical equation.

Q6. What is "Water of Crystallization"? Give the chemical formula for Gypsum and Plaster of Paris.

SECTION C: SHORT ANSWER QUESTIONS (3 MARKS EACH)

Q7. Explain the "Reactivity Series" of metals. Why is it impossible to store Silver Nitrate solution in a Copper container?

Q8. (a) What is a Homologous Series?

(b) State any two characteristics of a homologous series.

Q9. Write the balanced chemical equations for the following:

  1. Baking soda is heated during cooking.

  2. Chlorine gas is passed over dry slaked lime.

  3. Zinc granules react with dilute sulfuric acid.

SECTION D: LONG ANSWER QUESTIONS (5 MARKS EACH)

Q10. (a) What is Electrolytic Refining? Describe the process for the purification of Copper.

(b) Draw a neat labeled diagram of the electrolytic refining of copper.

Q11. (a) Explain the mechanism of the cleaning action of soaps.

(b) Why does soap not work well with hard water?

(c) Draw the structure of a Micelle.

SECTION E: CASE-BASED QUESTIONS (4 MARKS)

Q12. Case Study: pH in our Daily Life

The pH of our body works within the range of 7.0 to 7.8. When the pH of rainwater is less than 5.6, it is called acid rain. Our stomach produces $HCl$ which helps in digestion without harming the stomach. During indigestion, the stomach produces too much acid, causing pain and irritation.

  1. What is the name of the mild base used to neutralize excess stomach acid? (1M)

  2. How does acid rain affect aquatic life? (1M)

  3. Why do we apply baking soda solution on a bee sting area? (2M)

✅ QUICK SOLUTIONS & ANSWER KEY

QuestionCorrect Answer/Hint
Q1(a) Pale green (due to formation of $FeSO_{4}$)
Q2(c) $CH_{3}COOH$
Q3(a) Both are true and R explains A.
Q4(b) Aluminum
Q5It releases energy; $C_{6}H_{12}O_{6} + 6O_{2} \rightarrow 6CO_{2} + 6H_{2}O + Energy$
Q12 (1)Antacids (e.g., Milk of Magnesia).

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