Class 10 Science | State Board Board | Mixed Level Practice Test - 35 Questions (2026)

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📋 Questions in This Test

Q1 MCQ

Which of the following chemical equations represents a balanced chemical equation?

A H₂ + O₂ → H₂O

B 2H₂ + O₂ → 2H₂O

C H₂ + 2O₂ → H₂O

D 2H₂ + 2O₂ → H₂O

Q2 MCQ

What is the SI unit of electric current?

A Volt

B Ohm

C Ampere

D Watt

Q3 MCQ

Which part of the human brain is responsible for maintaining posture and balance?

A Cerebrum

B Cerebellum

C Medulla Oblongata

D Pons

Q4 MCQ

What type of mirror is used in the headlights of a car?

A Plane mirror

B Convex mirror

C Concave mirror

D Cylindrical mirror

Q5 MCQ

Which of the following is an example of a renewable source of energy?

A Coal

B Petroleum

C Natural Gas

D Solar energy

Q6 MCQ

What is the chemical formula of methane?

A CO₂

B CH₄

C C₂H₆

D C₂H₄

Q7 MCQ

Which gas is mainly responsible for the greenhouse effect?

A Oxygen

B Nitrogen

C Carbon Dioxide

D Hydrogen

Q8 MCQ

What is the function of xylem in plants?

A Transport of food

B Transport of water and minerals

C Synthesis of proteins

D Storage of starch

Q9 MCQ

Which of the following is an example of a physical change?

A Burning of wood

B Rusting of iron

C Melting of ice

D Digestion of food

Q10 MCQ

What is the role of the ozone layer?

A To trap heat in the atmosphere

B To reflect sunlight back into space

C To absorb harmful ultraviolet radiation

D To produce oxygen

Q11 MCQ

Which of the following is NOT a renewable source of energy?

A Solar energy

B Wind energy

C Fossil fuels

D Hydropower

Q12 MCQ

What is the chemical formula for sulfuric acid?

A HCl

B HNO$_3$

C H$_2$SO$_4$

D CH$_3$COOH

Q13 MCQ

Which part of the human eye controls the amount of light entering?

A Lens

B Retina

C Iris

D Cornea

Q14 MCQ

What is the process by which plants convert light energy into chemical energy?

A Respiration

B Photosynthesis

C Transpiration

D Digestion

Q15 MCQ

A car is moving with a velocity of 20 m/s and accelerates uniformly at 2 m/s$^2$ for 5 seconds. What is its final velocity?

A 25 m/s

B 30 m/s

C 40 m/s

D 50 m/s

Q16 MCQ

Which of the following is a noble gas?

A Hydrogen

B Oxygen

C Nitrogen

D Helium

Q17 MCQ

What type of reproduction involves the fusion of gametes?

A Asexual reproduction

B Vegetative propagation

C Sexual reproduction

D Budding

Q18 MCQ

If a resistor has a voltage of 12 V across it and a current of 2 A flowing through it, what is its resistance?

A 4 ohms

B 6 ohms

C 10 ohms

D 24 ohms

Q19 MCQ

Which of the following is the primary function of the kidneys?

A To digest food

B To filter blood and remove waste

C To pump blood

D To produce hormones

Q20 MCQ

What is the SI unit of electric charge?

A Volt

B Ampere

C Ohm

D Coulomb

Q21 MCQ

Which of the following chemical equations represents a balanced equation for the reaction between methane ($CH_4$) and oxygen ($O_2$) to produce carbon dioxide ($CO_2$) and water ($H_2O$)?

A $CH_4 + O_2 \rightarrow CO_2 + H_2O$

B $CH_4 + 2O_2 \rightarrow CO_2 + 2H_2O$

C $2CH_4 + O_2 \rightarrow 2CO_2 + 4H_2O$

D $CH_4 + 3O_2 \rightarrow CO_2 + 2H_2O$

Q22 MCQ

A lens forms an erect and magnified image of an object. Which type of lens is it, and what is the position of the object?

A Concave lens, object placed between the pole and focus.

B Convex lens, object placed between the pole and focus.

C Concave lens, object placed at infinity.

D Convex lens, object placed at 2F.

Q23 MCQ

What is the function of the xylem tissue in plants?

A Transporting water and minerals from the roots to the rest of the plant.

B Transporting sugars from the leaves to the rest of the plant.

C Providing support to the plant.

D Storing food for the plant.

Q24 MCQ

Which of the following is an example of a displacement reaction?

A $NaOH + HCl \rightarrow NaCl + H_2O$

B $2Mg + O_2 \rightarrow 2MgO$

C $CuSO_4 + Fe \rightarrow FeSO_4 + Cu$

D $N_2 + 3H_2 \rightarrow 2NH_3$

Q25 MCQ

What is the role of the ozone layer in the atmosphere?

A To reflect radio waves back to Earth.

B To absorb harmful ultraviolet radiation from the sun.

C To regulate the temperature of the Earth.

D To provide oxygen for breathing.

Q26 MCQ

What type of energy conversion occurs in a hydroelectric power plant?

A Chemical energy to electrical energy

B Nuclear energy to electrical energy

C Potential energy to kinetic energy to electrical energy

D Solar energy to electrical energy

Q27 MCQ

Which of the following is a renewable source of energy?

A Coal

B Petroleum

C Natural Gas

D Solar Energy

Q28 MCQ

Which of the following is NOT a characteristic property of acids?

A Sour taste

B Turns blue litmus red

C Reacts with metals to release hydrogen gas

D Feels soapy to the touch

Q29 MCQ

What is the primary function of the xylem in plants?

A Transport of water and minerals

B Transport of sugars

C Storage of food

D Synthesis of proteins

Q30 MCQ

A lens has a power of +2.0 Diopters. What is the focal length of the lens and what type of lens is it?

A 50 cm, Convex lens

B 50 cm, Concave lens

C 200 cm, Convex lens

D 200 cm, Concave lens

Q31 MCQ

Which of the following chemical equations represents a balanced redox reaction?

A NaOH + HCl → NaCl + H$_2$O

B Mg + O$_2$ → MgO

C CaCO$_3$ → CaO + CO$_2$

D NH$_3$ + H$_2$O → NH$_4$OH

Q32 MCQ

What is the function of the human pancreas?

A To pump blood throughout the body

B To filter waste products from the blood

C To produce bile for digestion

D To produce enzymes and hormones for digestion and blood sugar regulation

Q33 MCQ

A wire of resistance $R$ is stretched to double its length. How does the resistance change, assuming the density and resistivity of the material remain constant?

A Remains the same

B Becomes twice the original

C Becomes four times the original

D Becomes half the original

Q34 MCQ

Which of the following represents a displacement reaction?

A 2H$_2$ + O$_2$ → 2H$_2$O

B AgNO$_3$(aq) + NaCl(aq) → AgCl(s) + NaNO$_3$(aq)

C CuO(s) + H$_2$(g) → Cu(s) + H$_2$O(l)

D N$_2$ + 3H$_2$ → 2NH$_3$

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