Dr. Homi Bhabha Balvaidnyanik Competition is conducted by Greater Bombay Science Teachers’ Association since 1981. Students studying in 6th std. and 9th std from all board can participate in this examination. Dr. Homi Bhabha Exam is an excellent way to clear the science concepts and make a strong foundation for students.
Dr. Homi Bhabha Exam also helps in preparation for IIT and NEET entrance Exam.
class 9 sample paper 2024
1. Which of the following are vector quantities?
P) Length Q) Density R) Displacement S) Momentum
A. P, Q, R
B. P, R, S
C. R, S
D. Q, R
View Answer
C
2. Which of the following factors affect kinetic energy of an object?
X) Mass of an object Y) Velocity of an object Z) Momentum of an object
Momentum
A. X, Y
B. X, Y, Z
C. Y, Z
D. X, Z
View Answer
B
3. What will be the power developed by a gun when soldier fires a bullet of mass 20g at the rate of a 1 bullet/sec with a velocity of 1000m/s?
A. 100W
B. 1000W
C. 10KW
D. 100kw
View Answer
C
4. What will be the ratio of displacement to distance covered by an object moving with uniform linear motion
A. 1:2
B. 2:1
C. 1:1
D. 1:3
View Answer
C
5. Observe the following graph of sound wave and find the frequency of sound wave
A. 50Hz
B. 500 Hz
C. 0.02Hz
D. 0.002 Hz
View Answer
B
6. In computer what does RAM stands for
A. Read Access Memory
B. Random Access Memory
C. Rapidly Accelerator Memory
D. Readily Accessible Memory
View Answer
B
7. What would be the force required to exerts the pressure of 2000 pa on a surface area of 10 sq. cm
A. 2 N
B. 20 N
C. 200 N
D. 20000 N
View Answer
A
8. What will be the produced of the following, if two objects having zero conductivity of electricity are rubbed on each other?
A. Static electricity
B. Current electricity
C. Electromagnetism
D. Gravitational Attraction
View Answer
A
9. Find the incorrect statement for the given circuit diagram.
A. Battery is not connected properly in the circuit
B. When compass is kept near the circuit, it will not show any deflection
C. Bulb connected in the given circuit will not glow
D. Due to the battery in this circuit, electric wire behaves as magnet
View Answer
D
10. What is the speed of a moving object whose kinetic energy is 4 times its momentum
A. 4 m/s
B. 8 m/s
C. 16 m/s
D. 32 m/s
View Answer
B
11. Which of the following is a longitudinal wave?
A. Light wave
B. Water wave
C. Sound wave
D. Radio wave
View Answer
C
12. Which of the following spherical mirror is least curved?
A. Focal length is 5 cm
B. Radius of curvature is 5 cm
C. Inverted but same size image formed at 6 cm in front of mirror
D. Radius of curvature is 7 cm
View Answer
A
13. What is the ratio of potential difference across the resistors 1 Ω, 3 Ω & 6 Ω connected as shown in the following circuit?
A. 6:3:1
B. 1:2:3
C. 1:3:6
D. 1:1:1
View Answer
D
14. Which of the following are application of ultrasonic waves?
P) SONAR Q) Sonography R) Echocardiography
A. P, Q
B. Q, R
C. P, R
D. P, Q, R
View Answer
D
15. Which object will experience the greatest buoyant force when submerged in water?
A. solid iron ball
B. A wooden block
C. A hollow plastic ball
D.A solid aluminum cylinder
View Answer
C
16. The figures given below show two iron nails attached to the end of a bar magnet. Choose the correct figure showing effect of magnet.
View Answer
C
17. Which of the following temperatures give greatest buoyant force of the water?
P) 0°C Q) 4°C R) 277.15 K S) 39.2°F
A. P, Q and R
B. Q, R and S
C. P, R
D.Q, R
View Answer
B
18. Arrange the following media in ascending order of their speed of sound.
P) Vaccum Q) Liquid R) Gas S) Solid
A. P-R-Q-S
B. S-Q-R-P
C. R-Q-S-P
D.P-Q-R-S
View Answer
A
19. Current of 1A is flowing through the filament of an electric bulb. How many electrons will pass through the cross-section of the filament in 16 seconds?
View Answer
C
20. Determine the odd one out.
A.Gravitational force
B. Frictional force
C.Electrostatic force
D.Magnetic force
View Answer
B
21.On which principle does a fuse wire, made up of alloy, works
A. Heat produced by an electric current
B. Heat absorbed by an electric current
C. Production of an electric current
D. Produced variable electric current
View Answer
A
22. To complete the following flowchart for a Real Object and a mirror, select the correct alternative for P, Q, R.
View Answer
C
23. Which of the following statements are true for refracting telescope?
(P) Objective lens is larger than eye-piece
(Q) The image having chromatic aberration
(R) Eye-piece is larger than objective lens
(S) Mirrors are used in refracting telescope
A. P and Q
B. P and S
C. P, Q and S
D. Q and S
View Answer
A
24. Read the following statements and choose the correct option.
Statement I: Increasing the length of the conducting wire increases its resistance.
Statement II: Resistance is inversely proportional to the area of cross-section of the conductor
A.Both statements are true & statement II is correct explanation of the statement II
B. Both statements are true but statement II is not the correct explanation of the statement I
C. statement I is true but statement II is false
D. Statement I is false but statement II is true
View Answer
B
25. If an object is placed at 12 cm in front of the concave mirror, determine the image distance from the mirror, if ratio of height of the object to its height of image is 1:2.
A. 24 cm
B. 12 cm
C. 6 cm
D. 36 cm
View Answer
A
26. Which type of services are supported by INSAT and GSAT series satellite?
(P) Telecommunication network
(Q) Education
(R) Monitoring and management
(S) Television and management of natural resource
A. P, Q, R
B. P, Q, S
C. P, R
D. P, S
View Answer
B
27. Four distinct pieces of different dimensions are made from same metal as shown in the given figure. Arrange them in the ascending order of resistance.
(In figure x-cross sectional area, l length of the conductor)
A. R, P, Q, S
B. S, Q, P, R
C. P, Q, R, S
D. S, R, Q, P
View Answer
A
28. A light ray makes an angle with plane mirror is 45°. If this angle is increased by 15° then what is the effective angle of reflection?
A. 45°
B. 60°
C. 30°
D. 15°
View Answer
C
29.Which of the following is mixtures can be separated with the help of magnet?
A. Iron + Cobalt
B. Copper + Magnesium
C. Nickel + Copper
D.Cobalt + Nickel
View Answer
C
30.Which of the following phenomenon causes mirage?
A. Refraction and total internal reflection
B. Total internal reflection and scattering
C. Total internal reflection and dispersion
D. Reflection and dispersion
View Answer
A
31. Match the following
A. i-z-q ii-x-r iii–y-p
B. i-x-q ii-z-r iii–y-p
C. i-y-q ii- z-p iii- z-r
D.i-z-p ii-x-q iii-y-r
View Answer
A
32. Identify the correct statements from the following.
a) Burning of wood is a physical and irreversible change
b) Boiling of water is a chemical and reversible change
c) Grinding wood into sawdust is a physical and irreversible
A. Only (a)
B. (a) & (b)
C. (b) &(c)
D. Only (c)
View Answer
D
33. An element “ X” is a bad conductor of electricity. It burns in oxygen to produce a gas which dissolves in water and the solution turns blue litmus paper red The element “X” is?
A. Carbon
B. Nitrogen
C. Magnesium
D. Sulphur
View Answer
D
34. Three element “ X”, “Y” & “Z” have atomic number 18, 19,20 respectively. How many electrons are present in the “L” shell of these elements?
A. 8, 9, 10
B. 8, 10, 13
C. 8, 8, 8
D. 8, 9, 12
View Answer
C
35. Identify the correct option related to conversion of 25°C, 38°C and 66°C to kelvin scale, in ascending order?
A. 298 K, 311 K and 399 K
B. 298 K, 300 K and 338 K
C. 273 K, 278 K and 543 K
D. 298 K, 311 K and 339 K
View Answer
D
36. Which of the following reactions is not feasible?
A. PbSO₄ + Fe → FeSO₄ +Pb
B. Al + CuSO₄ →Cu + Al₂(SO₄)₃
C. Zn + CaSO₄ → ZnSO₄ + Ca
D. Mg + ZnSO₄ → MgSO₄ + Zn
View Answer
C
37. When water is added to solid calcium oxide, which of the following statement is correct about this reaction?
A. Is endothermic & pH of the solution formed is more than 7
B. Is exothermic and pH of the solution formed is 7
C. Is endothermic and pH of the solution formed is 7
D. Is exothermic & pH of the solution formed is more than7
View Answer
D
38. Which of the following compound have triple bond in its structural formula?
View Answer
B
39. When we add aluminum foil to freshly prepared sodium hydroxide solution a gas is produced. Which of the following correctly states the property of this gas?
A. Colorless an odourless gas produce a pop sound when burning match stick is brought near
B. Colurless and odourless gas which extinguishes a burning match stick
C. Colurless and odourless gas which promotes burning a candle
D. Brown coloured pungent smelling gas
View Answer
A
40. The below diagram shows the reaction between metal and dilute acid, why does Mg in the test tube “S” behave differently?
A. Mg is lighter element than dilute HCl
B. Mg react with dilute HCl to produce H2 gas which helps in floating
C. Mg react with dilute HCl to produce in Cl2 gas which helps in floating
D. Mg react with dilute HCl to produce in MgCl2 gas which helps in floating
View Answer
B
A. (i), (iii)
B. (ii), (iv)
C. (i), (ii), (iii)
D. All of the above
View Answer
A
42. Which of the following are obtained from petroleum?
(X) CNG (Y) LPG (Z) Diesel (W) Coal gas?
A. (X) & (Y)
B. (X) & (Z)
C. (Y) & (Z)
D. (X) & (W)
View Answer
C
43. You are given test tubes “X” “Y” & “Z” half filled with different solution of Nacl, NaOH, dil. HCl respectively. On adding one drop of phenolphthalein solution to each of the test tube, what will you observe in the test tubes?
View Answer
B
44. Match the columns in List 1 & List 2
A. P-1 Q-2 R-3 S-4
B. P-3 Q-2 R-1 S-4
C. P-4 Q-3 R-1 S-2
D. P-2 Q-1 R-4 S-3
View Answer
D
45. The common characteristic property of plastic are
A. Durable, good conductor of electricity, non reactive
B. Durable, good conductor of heat, non reactiv
C. Good conductor of heat, light in weight, good conductor of electricity
D. Durable, light in weight, non reactive
View Answer
D
View Answer
D
A. (i),(ii) & (iii)
B. (ii),(iii) & (iv)
C. (i),(iii) & (iv)
D. (i),(ii) & (iv)
View Answer
C
48. Which of the following is a heterogeneous mixture?
A. Stainless steel
B. Iodised table salt
C. Air filled in a balloon
D. Brass
View Answer
B
49. The following observations were made by students on treating metals P,Q,R & S with the given salt solution. Which is the correct increasing order of reactivity
A. R< S<Q<P
B. S< R<P<Q
C. Q< P<R<S
D. P<Q<S<R
View Answer
B
50.The graph given below depicts neutralization reaction. The pH of solution changes as we add excess acid to an alkali. Which letter denotes the area of the graph where both acid and salt are present
A.K
B. S
C. R
D. M
View Answer
D
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How will Homi Bhabha Exam benefit the student?
- The Dr. Homi Bhabha Exam is an excellent way to clarify scientific concepts and build a strong foundation for future learning.
- it helps students to clear IIT or medical exam.
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