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Chemistry 10 Past Paper 2025 | Notely

HomePast papersChemistry 102025

All Chemistry 10 papers

Matric 10 · Past paper

Chemistry 10 past paper 2025

80 published questions in this index. The full practice view lets you work through them and track your own attempts.

24 MCQs56 written questionsPractise this paper

Question index

2(ii)
Water has maximum density at 4°C. How does it help the aquatic life to survive in winter?
Part B3 marksannualMatter
2(ii)
Why does ice float on the top of water? Describe its benefit.
Part B3 marksannualMatter
10
Which statement about water is correct?
MCQannualMatter
10
Which statement about water is WRONG?

This is a skimmable index, not a replacement for the study surface. Open the practice view to answer questions and use the linked study material.

MCQannualMatter

2(xi)

What is meant by Electrorefining of copper? Write down reactions occurring at anode and cathode.

Part B3 marksannualElectrochemistry

2

The correct equilibrium constant expression for the given reaction is: 2A + B 3C

MCQannualReaction Kinetics

2

The correct equilibrium constant expression for the given reaction is: 2CO + O2 2CO2

MCQannualReaction Kinetics

2(vi)

State necessary conditions for chemical equilibrium.

Part B3 marksannualReaction Kinetics

2(vi)

State necessary conditions for chemical equilibrium.

Part B3 marksannualReaction Kinetics

2(vii)

Write forward and reverse reactions of given reversible reactions. a. H2 + I2 2HI b. N2O4 2NO2

Part B3 marksannualReaction Kinetics

2(vii)

Write macroscopic characteristics of both forward and reverse reactions.

Part B3 marksannualReaction Kinetics

2(viii)

Derive an expression for equilibrium constant of given reaction. Also write its units. 2NO + O2 2NO2

Part B3 marksannualReaction Kinetics

2(viii)

Derive an expression for equilibrium constant of following reaction. Also write its units. CO + 2H2 CH3OH

Part B3 marksannualReaction Kinetics

7

Concentration of reactants and products in moles dm^-3 in a dilute solution represents:

MCQannualReaction Kinetics

7

Concentration of reactants and products in moles dm^-3 in a dilute solution represents:

MCQannualReaction Kinetics

1

Which of the following can behave both as Bronsted acid and Bronsted base?

MCQannualSalts

1

Which of the following can behave both as Bronsted acid and Bronsted base?

MCQannualSalts

2(iv)

Classify the following as Lewis acid or Lewis base. a H2O b Br- c Cu+2 d NH3 e Fe+3 f BF3

Part B3 marksannualSalts

2(iv)

Classify the following as Lewis acid or Lewis base: a NH3 b Ag+ c H2S d AlCl3 e Cl- f FeCl3

Part B3 marksannualSalts

2(v)

Classify the solution as acidic, basic or neutral. a Solution A [H+]=4.2x10^-3 M b Solution B [OH-]=8.9x10^-4 M c Solution C [H+]=1x10^-7 M

Part B3 marksannualSalts

2(v)

Classify the solution as acidic, basic or neutral. a Solution A [H+]=3.8x10^-3 M b Solution B [OH-]=8.9x10^-4 M c Solution C [OH-]=1x10^-7 M

Part B3 marksannualSalts

2(x)

Write complete balanced neutralization reaction between phosphoric acid and sodium hydroxide in three steps.

Part B3 marksannualSalts

2(x)

Write complete balanced neutralization reaction between carbonic acid and potassium hydroxide in two steps.

Part B3 marksannualSalts

4

Identify the Arrhenius base:

MCQannualSalts

4

Identify Arrhenius acid from the following:

MCQannualSalts

Q.3

State Bronsted-Lowry concept of Acids and Bases. Discuss reactions of NH3 and HCl with water in light of this concept. How does water behave in both reactions?

Part C6 marksannualSalts

Q.3

What are Arrhenius acid and Arrhenius base? Classify HNO3, H2SO4, NaOH and KOH as Arrhenius acid or base with chemical reactions.

Part C6 marksannualSalts

Q.4

What is hard water? Write down methods used to remove temporary hardness of water.

Part C6 marksannualSalts

Q.4

Which salts make the water hard? For which purpose Clark's method and Ion-exchange method are used? Elaborate your answer.

Part C6 marksannualSalts

2(i)

What are advantages of urea as a fertilizer? (Any three)

Part B3 marksannualNitrogen, Sulphur And Metals

2(i)

Why is urea widely used as fertilizer? Give any three reasons.

Part B3 marksannualNitrogen, Sulphur And Metals

2(ii)

Write down sources and harmful effects of nitrogen oxides (NOx)

Part B3 marksannualNitrogen, Sulphur And Metals

2(iii)

What is meant by global warming? Enlist any two harmful effects.

Part B3 marksannualNitrogen, Sulphur And Metals

2(iii)

What is meant by Ozone depletion? Write its one cause.

Part B3 marksannualNitrogen, Sulphur And Metals

2(iv)

How is carbon monoxide gas produced? Write its any two harmful effects.

Part B3 marksannualNitrogen, Sulphur And Metals

2(vi)

Draw flow sheet diagram for urea manufacturing in industry.

Part B3 marksannualNitrogen, Sulphur And Metals

2(vi)

How is urea manufactured in industry? Write chemical reactions only.

Part B3 marksannualNitrogen, Sulphur And Metals

2(viii)

In Solvay process, which reactions occur in carbonating tower? How ammonia recovery takes place? Write reactions.

Part B3 marksannualNitrogen, Sulphur And Metals

2(viii)

In Solvay process, which reactions occur in carbonating tower? How does ammonia recovery take place? Write reactions.

Part B3 marksannualNitrogen, Sulphur And Metals

2(x)

What is Troposphere? How it contains about 80% mass of the atmosphere?

Part B3 marksannualNitrogen, Sulphur And Metals

2(x)

What is stratosphere? Why is the temperature of upper stratosphere high?

Part B3 marksannualNitrogen, Sulphur And Metals

2(xi)

Briefly explain the term blister copper. How is it obtained from copper ore during Bessemerization?

Part B3 marksannualNitrogen, Sulphur And Metals

3

Which gas is widely used for welding and cutting metals?

MCQannualNitrogen, Sulphur And Metals

8

The envelop of gases and water vapours, surrounding the planet earth is called:

MCQannualNitrogen, Sulphur And Metals

8

The envelop of gases and water vapours, surrounding the planet earth is called:

MCQannualNitrogen, Sulphur And Metals

9

Which of the following is an air pollutant?

MCQannualNitrogen, Sulphur And Metals

9

Which of the following is an air pollutant?

MCQannualNitrogen, Sulphur And Metals

11

Separation of Minerals from gangue by some physical method is called:

MCQannualNitrogen, Sulphur And Metals

11

During metallurgy, which step is used in the concentration process of metals?

MCQannualNitrogen, Sulphur And Metals

12

In Solvay process, which two chemicals are dissolved in water to form ammonical brine?

MCQannualNitrogen, Sulphur And Metals

12

In Solvay process, which gas is obtained by heating NaHCO3?

MCQannualNitrogen, Sulphur And Metals

Q.5

What is ozone hole? How CFCs contribute in the depletion of ozone.

Part C4 marksannualNitrogen, Sulphur And Metals

Q.5

What is acid rain? Describe harmful effects of acid rain.

Part C4 marksannualNitrogen, Sulphur And Metals

2(i)

Give any three uses of organic compounds.

Part B3 marksannualOrganic Chemistry

2(i)

What is homologous series? Give one example.

Part B3 marksannualOrganic Chemistry

2(iii)

What is homologous series? Give one example.

Part B3 marksannualOrganic Chemistry

2(iv)

What are the main sources of organic compounds? Describe any one source briefly.

Part B3 marksannualOrganic Chemistry

2(vii)

What is meant by functional group? Identify the functional group of following compounds: a CH3COCH3 b CH3COOCH

Part B3 marksannualOrganic Chemistry

2(vii)

What is functional group? Identify the functional group in following compounds: a CH3NH2 b CH3COOCH3

Part B3 marksannualOrganic Chemistry

5

Halogenation of methane in diffused sunlight does NOT produce:

MCQannualOrganic Chemistry

5

Halogenation of methane in direct sunlight produces:

MCQannualOrganic Chemistry

Q.3

What is the trend of reactivity of halogens with alkanes? How methane reacts with chlorine in diffused and direct sunlight?

Part C6 marksannualOrganic Chemistry

Q.3

What is meant by Halogenation? How does methane undergo halogenation under diffused and direct sunlight?

Part C6 marksannualOrganic Chemistry

2(ix)

How is tetrachloro ethane prepared from ethyne? Write complete equation in two steps.

Part B3 marksannualHydrocarbons

2(ix)

How is tetrachloro ethane prepared from ethyne? Write complete equation in two steps.

Part B3 marksannualHydrocarbons

2(v)

Write down IUPAC names of following alkanes. a CH4 b CH3-CH2-CH3 c CH3-CH2-CH2-CH3

Part B3 marksannualHydrocarbons

2(v)

Write down IUPAC names of following: a CH3CH2CH3 b CH3CH2CH2CH2CH3 c CH3CH2CH2CH3

Part B3 marksannualHydrocarbons

2(xi)

What is Bayer's test? How is it used to identify ethene?

Part B3 marksannualHydrocarbons

2(xi)

How is oxalic acid prepared from ethyne? Write complete equation.

Part B3 marksannualHydrocarbons

Q.5

What is meant by fractional distillation? Write down names and uses of any three fractions of petroleum.

Part C4 marksannualHydrocarbons

Q.5

What is meant by fractional distillation? Write down names and uses of any three fractions of petroleum.

Part C4 marksannualHydrocarbons

3

Which compound is used as an antiseptic in hospital operating rooms?

MCQannualHydroxy Compounds

6

Fats and oils are used to manufacture:

MCQannualCarboxylic Compounds

2(ii)

Enlist any three uses of lipids.

Part B3 marksannualBiochemistry

2(iii)

Enlist any three sources of lipids.

Part B3 marksannualBiochemistry

6

Proteins are essential for the formation of:

MCQannualBiochemistry

Q.4

Differentiate between Monosaccharides and disaccharides with examples.

Part C6 marksannualBiochemistry

Q.4

Describe the sources and any four uses of proteins.

Part C6 marksannualBiochemistry

Q.6

Discuss any four uses of proteins.

Part C4 marksannualBiochemistry

Q.6

Describe the importance of vitamins. (Any four points)

Part C4 marksannualBiochemistry