Class 9 Science | CBSE (NCERT) Board | Mixed Level Practice Test - 40 Questions (2026)

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📋 Questions in This Test

Q1 MCQ

A body is moving uniformly along a circular path of radius $r$. What is the distance and displacement of the body after completing one revolution?

A Distance: $2\pi r$, Displacement: $2r$

B Distance: $2r$, Displacement: $2\pi r$

C Distance: $2\pi r$, Displacement: $0$

D Distance: $0$, Displacement: $2\pi r$

Q2 MCQ

Which of the following statements is true about the law of conservation of mass?

A Mass can be created but not destroyed.

B Mass can be destroyed but not created.

C Mass can neither be created nor destroyed in a chemical reaction.

D The total mass of the reactants is always less than the total mass of the products.

Q3 MCQ

If a wave has a frequency of 2 Hz and a wavelength of 3 m, what is its speed?

A 1.5 m/s

B 5 m/s

C 6 m/s

D 8 m/s

Q4 MCQ

Which of the following cell organelles is known as the 'powerhouse of the cell'?

A Golgi Apparatus

B Endoplasmic Reticulum

C Mitochondria

D Ribosomes

Q5 MCQ

What is the SI unit of momentum?

A kg m/s$^2$

B kg m$^2$/s

C kg m/s

D N/m$^2$

Q6 MCQ

Which of the following is a micronutrient essential for plant growth?

A Nitrogen

B Phosphorus

C Potassium

D Iron

Q7 MCQ

If the mass of an object is 10 kg, what is its weight on Earth? (Assume $g = 9.8 ext{ m/s}^2$)

A 9.8 N

B 10 N

C 98 N

D 100 N

Q8 MCQ

Which of the following diseases is caused by a virus?

A Tuberculosis

B Malaria

C Common Cold

D Cholera

Q9 MCQ

What is the chemical formula for sodium chloride?

A NaCl$_2$

B Na$_2$Cl

C NaCl

D Na$_2$Cl$_2$

Q10 MCQ

A sound wave travels from air to water. Which of the following properties remains unchanged?

A Velocity

B Wavelength

C Frequency

D Amplitude

Q11 MCQ

A body is thrown vertically upwards with a velocity of $19.6 \, m/s$. Calculate the total distance travelled by the body before reaching the ground. (Assume $g = 9.8 \, m/s^2$)

A $19.6 \, m$

B $9.8 \, m$

C $39.2 \, m$

D $0 \, m$

Q12 MCQ

Which of the following statements correctly describes the relationship between mass and inertia?

A Greater the mass, lesser the inertia.

B Lesser the mass, greater the inertia.

C Mass and inertia are unrelated.

D Greater the mass, greater the inertia.

Q13 MCQ

Which of the following is NOT a characteristic of a suspension?

A It is a heterogeneous mixture.

B The particles can be seen with the naked eye.

C The particles settle down if left undisturbed.

D It is transparent and clear.

Q14 MCQ

What is the SI unit of pressure?

A Newton

B Pascal

C Joule

D Watt

Q15 MCQ

Which of the following cell organelles is responsible for generating energy in the form of ATP?

A Golgi apparatus

B Endoplasmic reticulum

C Mitochondria

D Ribosomes

Q16 MCQ

If the frequency of a sound wave is $256 \, Hz$, and its wavelength is $1.3 \, m$, calculate the speed of the wave.

A $196.9 \, m/s$

B $332.8 \, m/s$

C $257.3 \, m/s$

D $300 \, m/s$

Q17 MCQ

Which gas is commonly known as 'laughing gas' and is used as an anesthetic?

A Carbon dioxide

B Nitrous oxide

C Methane

D Oxygen

Q18 MCQ

What is the chemical formula of ammonium sulfate?

A $(NH_4)SO_4$

B $(NH_4)_2SO_4$

C $NH_4SO_4$

D $(NH_3)_2SO_4$

Q19 MCQ

Which of the following diseases is caused by a protozoan?

A Tuberculosis

B Malaria

C Influenza

D Tetanus

Q20 MCQ

An object of mass $10 \, kg$ is moving with a uniform velocity of $2 \, m/s$. What is the kinetic energy of the object?

A $10 \, J$

B $20 \, J$

C $30 \, J$

D $40 \, J$

Q21 MCQ

A body is thrown vertically upwards with a velocity of 19.6 m/s. What is the maximum height reached by the body? (Assume $g = 9.8 m/s^2$)

A 9.8 m

B 19.6 m

C 29.4 m

D 39.2 m

Q22 MCQ

Which of the following cell organelles is responsible for the synthesis of proteins?

A Mitochondria

B Golgi apparatus

C Ribosomes

D Lysosomes

Q23 MCQ

The atomic number of an element is 17. What will be its valency?

A 1

B 5

C 7

D 3

Q24 MCQ

If a wave has a frequency of 2 Hz and a wavelength of 3 m, what is its velocity?

A 1.5 m/s

B 5 m/s

C 6 m/s

D 8 m/s

Q25 MCQ

Which of the following is NOT a communicable disease?

A Tuberculosis

B Cholera

C Cancer

D Influenza

Q26 MCQ

What is the S.I. unit of momentum?

A kg m/s

B N s

C Both A and B

D kg $m/s^2$

Q27 MCQ

The process by which plants prepare their own food is called:

A Respiration

B Transpiration

C Photosynthesis

D Digestion

Q28 MCQ

Which of the following is an example of a suspension?

A Sugar solution

B Milk

C Muddy water

D Salt solution

Q29 MCQ

Calculate the work done in moving a body of mass 5 kg through a height of 2 m. (Assume $g = 9.8 m/s^2$)

A 49 J

B 98 J

C 19.6 J

D 10 J

Q30 MCQ

A body is moving uniformly along a circular path of radius $r$. What is the distance covered and the displacement of the body after completing one complete revolution?

A Distance = $2\pi r$, Displacement = $2\pi r$

B Distance = $2\pi r$, Displacement = 0

C Distance = 0, Displacement = $2\pi r$

D Distance = 0, Displacement = 0

Q31 MCQ

Which of the following statements is NOT true about matter?

A Matter is made up of tiny particles called atoms or molecules.

B The particles of matter are in constant random motion.

C The particles of matter have spaces between them.

D The particles of matter do not attract each other.

Q32 MCQ

What is the momentum of a 10 kg bowling ball rolling at 2 m/s?

A 5 kg m/s

B 10 kg m/s

C 20 kg m/s

D 30 kg m/s

Q33 MCQ

Which cell organelle is known as the 'powerhouse of the cell'?

A Golgi apparatus

B Endoplasmic reticulum

C Mitochondria

D Ribosomes

Q34 MCQ

What is the SI unit of gravitational constant (G)?

A Nm$^2$kg$^{-1}$

B Nmkg$^{-2}$

C Nm$^2$kg$^{-2}$

D Nkg$^2$m$^{-2}$

Q35 MCQ

If a wave has a frequency of 2 Hz and a wavelength of 1.5 m, what is its speed?

A 0.75 m/s

B 3 m/s

C 3.5 m/s

D 4 m/s

Q36 MCQ

Which of the following is a chemical change?

A Melting of ice

B Dissolving sugar in water

C Burning of wood

D Sublimation of iodine

Q37 MCQ

Which of the following contributes to the greenhouse effect?

A Oxygen

B Carbon dioxide

C Nitrogen

D Hydrogen

Q38 MCQ

An object of mass $m$ is raised to a height $h$ from the ground. The potential energy of the object is:

A $mgh$

B $rac{1}{2}mv^2$

C $mv^2$

D $rac{1}{2}mgh$

Q39 MCQ

A body of mass 2 kg is moving with a velocity of 10 m/s. If the velocity is doubled, what will be the ratio of the initial kinetic energy to the final kinetic energy?

A 1:4

B 4:1

C 1:2

D 2:1

Q40 MCQ

Which of the following statements correctly describes the relationship between temperature and the rate of diffusion?

A As temperature decreases, the rate of diffusion increases.

B As temperature increases, the rate of diffusion decreases.

C Temperature has no effect on the rate of diffusion.

D As temperature increases, the rate of diffusion increases.

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