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Sections: Physics Chemistry Biology
Q1. [+4, -1] Physics
⚠ Negative Marking: -1 mark per wrong answer (+4 for correct, -1 for incorrect)
A body starts from rest and moves with uniform acceleration of 2 m/s². The distance covered in 5 seconds is:
A. 10 m
B. 25 m
C. 50 m
D. 5 m
Correct Answer: B
s = ut + ½at² = 0 + ½ × 2 × 25 = 25 m.
Q2. [+4, -1] Physics
Which of the following has the highest specific heat capacity?
A. Iron
B. Copper
C. Water
D. Lead
Correct Answer: C
Water has the highest specific heat capacity (4200 J/kg°C) among common substances.
Q3. [+4, -1] Physics
The SI unit of electric potential is:
A. Coulomb
B. Ohm
C. Volt
D. Ampere
Correct Answer: C
Electric potential is measured in Volts (V = J/C).
Q4. [+4, -1] Physics
A convex mirror always forms which type of image?
A. Real and inverted
B. Virtual and erect
C. Real and erect
D. Virtual and inverted
Correct Answer: B
Convex mirrors always form virtual, erect, and diminished images regardless of object position.
Q5. [+4, -1] Physics
The dimensional formula of force is:
A. [MLT?¹]
B. [ML?¹T?²]
C. [MLT?²]
D. [ML²T?²]
Correct Answer: C
F = ma ? [F] = [M][LT?²] = [MLT?²].
Q6. [+4, -1] Chemistry
The most electronegative element is:
A. Oxygen
B. Fluorine
C. Chlorine
D. Nitrogen
Correct Answer: B
Fluorine (4.0) is the most electronegative element on the Pauling scale.
Q7. [+4, -1] Chemistry
Which gas is produced when zinc reacts with dilute H2SO4?
A. Oxygen
B. Chlorine
C. Hydrogen
D. Carbon dioxide
Correct Answer: C
Zn + H2SO4 ? ZnSO4 + H2?. Hydrogen gas is produced.
Q8. [+4, -1] Chemistry
Which of the following is a noble gas?
A. Hydrogen
B. Nitrogen
C. Argon
D. Chlorine
Correct Answer: C
Argon (Ar) is a noble gas in Group 18 with a full valence shell.
Q9. [+4, -1] Chemistry
The number of oxygen atoms in 1 mole of H2SO4 is:
A. 4 × 6.022 × 10²³
B. 6.022 × 10²³
C. 2 × 6.022 × 10²³
D. 7 × 6.022 × 10²³
Correct Answer: A
1 molecule of H2SO4 has 4 O atoms. 1 mole has 4 × NA = 4 × 6.022 × 10²³ atoms.
Q10. [+4, -1] Chemistry
Which bond is present in NaCl?
A. Covalent bond
B. Metallic bond
C. Ionic bond
D. Hydrogen bond
Correct Answer: C
NaCl forms an ionic bond between Na? and Cl? through electron transfer.
Q11. [+4, -1] Biology
The powerhouse of the cell is:
A. Nucleus
B. Ribosome
C. Mitochondria
D. Golgi apparatus
Correct Answer: C
Mitochondria produce ATP through cellular respiration, hence called the powerhouse of the cell.
Q12. [+4, -1] Biology
Which vitamin is produced in the skin on exposure to sunlight?
A. Vitamin A
B. Vitamin D
C. Vitamin C
D. Vitamin B12
Correct Answer: B
UV rays convert 7-dehydrocholesterol to Vitamin D3 in the skin.
Q13. [+4, -1] Biology
The human heart has how many chambers?
Correct Answer: C
Human heart has 4 chambers: 2 atria and 2 ventricles.
Q14. [+4, -1] Biology
DNA replication is which type of process?
A. Conservative
B. Semiconservative
C. Dispersive
D. Random
Correct Answer: B
DNA replication follows the semiconservative model as demonstrated by Meselson and Stahl.
Q15. [+4, -1] Biology
Which hormone regulates blood sugar level?
A. Thyroxine
B. Insulin
C. Adrenaline
D. Estrogen
Correct Answer: B
Insulin lowers blood glucose, while glucagon raises it.
Q16. [+4, -1] Physics
The work done in moving a charge of 5 C across two points with potential difference 10 V is:
A. 2 J
B. 15 J
C. 50 J
D. 5 J
Correct Answer: C
W = QV = 5 × 10 = 50 J.
Q17. [+4, -1] Physics
The frequency of a wave with time period 0.02 s is:
A. 20 Hz
B. 50 Hz
C. 100 Hz
D. 25 Hz
Correct Answer: B
f = 1/T = 1/0.02 = 50 Hz.
Q18. [+4, -1] Physics
The refractive index of a medium is 1.5. Speed of light in this medium is:
A. 3 × 108 m/s
B. 2 × 108 m/s
C. 4.5 × 108 m/s
D. 1.5 × 108 m/s
Correct Answer: B
v = c/n = 3×108/1.5 = 2×108 m/s.
Q19. [+4, -1] Physics
Which of the following is a scalar quantity?
A. Force
B. Velocity
C. Energy
D. Acceleration
Correct Answer: C
Energy has magnitude only (no direction), hence scalar. Force, velocity, acceleration are vectors.
Q20. [+4, -1] Physics
A body of mass 2 kg is moving with velocity 3 m/s. Its kinetic energy is:
A. 3 J
B. 9 J
C. 6 J
D. 18 J
Correct Answer: B
KE = ½mv² = ½ × 2 × 9 = 9 J.
Q21. [+4, -1] Chemistry
The pH of a neutral solution at 25°C is:
Correct Answer: B
[H?] = [OH?] = 10?7 M ? pH = 7 at 25°C.
Q22. [+4, -1] Chemistry
The chemical formula of rust is:
A. FeO
B. Fe2O3
C. Fe2O3·xH2O
D. Fe3O4
Correct Answer: C
Rust is hydrated iron(III) oxide, Fe2O3·xH2O.
Q23. [+4, -1] Chemistry
Which catalyst is used in the Haber process for ammonia synthesis?
A. Vanadium pentoxide
B. Iron
C. Nickel
D. Platinum
Correct Answer: B
Haber process uses finely divided iron with promoters (K2O, Al2O3) as catalyst.
Q24. [+4, -1] Chemistry
Which of the following is an isotope of hydrogen?
A. Protium
B. Deuterium
C. Tritium
D. All of these
Correct Answer: D
Protium (¹H), Deuterium (²H), and Tritium (³H) are all isotopes of hydrogen.
Q25. [+4, -1] Chemistry
The number of electrons in Na? ion is:
Correct Answer: B
Na (11 e?) ? Na? loses 1 e? ? 10 electrons.
Q26. [+4, -1] Biology
The longest bone in the human body is:
A. Humerus
B. Femur
C. Tibia
D. Fibula
Correct Answer: B
Femur (thigh bone) is the longest and strongest bone in the human body.
Q27. [+4, -1] Biology
Which organ is responsible for blood filtration?
A. Liver
B. Kidney
C. Heart
D. Lungs
Correct Answer: B
Kidneys filter blood through nephrons, removing waste and excess water to form urine.
Q28. [+4, -1] Biology
The pigment responsible for skin color is:
A. Chlorophyll
B. Haemoglobin
C. Melanin
D. Carotene
Correct Answer: C
Melanin produced by melanocytes determines skin, hair, and eye color.
Q29. [+4, -1] Biology
Blood group with no antigens on RBC is:
Correct Answer: D
Blood group O has no A or B antigens on RBCs but has both anti-A and anti-B antibodies.
Q30. [+4, -1] Biology
Which enzyme breaks down starch in the mouth?
A. Amylase
B. Pepsin
C. Lipase
D. Trypsin
Correct Answer: A
Salivary amylase (ptyalin) breaks down starch into maltose in the oral cavity.