General Science MCQs for RRB NTPC/ JE/ Group D/ ALP
1. The rate of change of velocity is called :
(a) Force
(b) Momentum
(c) Acceleration
(d) Speed
2. Sound is a :
(a) Tidal wave
(b) Mechanical wave
(c) Surface wave
(d) Electromagnetic wave
3. If a body is whirled in a circle the work done on it ......
(a) is negative
(b) is zero
(c) cannot be determined
(d) is positive
4. Metals can be given different shapes according to our needs because they possess the properties of :
(a) Malleability and ductility
(b) Ductility and conductivity
(c) Malleability and sonorosity
(d) Conductivity and sonorosity
5. What is the Centre of Curvature of a spherical mirror ?
(a) It is a point from which the rays of light appear to be coming from on the principal axis of a convex mirror.
(b) It is the centre of a hollow sphere of which the spherical mirror is a part.
(c) It is the midpoint of a spherical mirror.
(d) It is the point on the principal axis through which rays of light parallel to the principal axis pass after reflection.
6. The motile germ cell is called a/an :
(a) Isogamete
(b) Gamete
(c) Male gamete
(d) Female gamete
7. Dwarfness can be controlled by treating plants with :
(a) Auxin
(b) Cytokinin
(c) Gibberellic acid
(d) Ethylene
8. If the initial velocity of a car is 5 m/s, and the final velocity is 10 m/s in 5 s, then the acceleration is ......
(a) 10 m/s²
(b) 5 m/s²
(c) 0.1 m/s²
(d) 1 m/s²
9. Which one of the following is commonly used as an indicator to measure the exact pH ?
(a) Eosin
(b) Universal indicator
(c) Litmus
(d) Phenolphthalein
10. Aluminium oxide is ......... in nature.
(a) acidic
(b) basic
(c) neutral
(d) amphoteric
11. Which of the following metals is a liquid at room temperature ?
(a) Lithium
(b) Calcium
(c) Mercury
(d) Sodium
12. Which of the following solutions in alkaline ?
(a) [H⁺] = 1 × 10⁻⁸ Mol/l
(b) [H⁺] = 1 × 10⁻⁷ Mol/l
(c) [H⁺] > 1 × 10⁻⁷ Mol/l
(d) [H⁺] < 1 × 10⁻⁷ Mol/l
13. What is the atomicity of Phosphorus?
(a) Mono-atomic
(b) Di-atomic
(c) Poly-atomic
(d) Tetra-atomic
14. The egg is carried from the ovary to the womb through :
(a) the vas deferens
(b) the oviduct
(c) the cervix
(d) the uterus
15. Which of the following plant tissues is capable of cell division ?
(a) Meristem
(b) Sclerenchyma
(c) Xylem
(d) Parenchyma
16. Which of the following classifications is based on atomic numbers ?
(a) Modern Periodic Table
(b) Dobereiner's Law of Triads
(c) Newlands Law of Octaves
(d) Mendeleev's Periodic Table
17. Which of the following is used in the preparation of tincture iodine, cough syrup and many tonics ?
(a) Ethanoic acid
(b) Ethanol
(c) Methanol
(d) Acetic acid
18. The number of electrons that can be accommodated in the M shell is :
(a) 32
(b) 18
(c) 8
(d) 2
19. Which part of the human reproductive system helps the embryo get its nutrition from the mother's blood ?
(a) Uterus
(b) Cervix
(c) Placenta
(d) Fallopian tube
20. An object having a mass 'm' moving with a velocity 'v' possesses a kinetic energy 'K'. If its velocity is doubled, its kinetic energy will become :
(a) 4 K
(b) K/4
(c) K/2
(d) 2 K
21. What is the principal focus of a spherical mirror ?
(a) It is a point from which the rays of light appear to be coming from on the principal axis of a convex mirror.
(b) It is the point on the principal axis through which rays of light parallel to the principal axis pass after reflection or appear to be arising from this point on the principal axis.
(c) It is the centre of a hollow sphere of which the spherical mirror is a part.
(d) It is the midpoint of a spherical mirror.
22. The mass of one molecule of oxygen is ......
(a) 2.3 × 10⁻²³ g
(b) 3.3 × 10⁻²³ g
(c) 5.3 × 10⁻²³ g
(d) 4.3 × 10⁻²³ g
23. Which of the following metals reacts vigorously with cold water ?
(a) Iron
(b) Aluminium
(c) Zinc
(d) Potassium
Answers below page
Here are the answers for all 23 MCQs:
1. (c) Acceleration
Rate of change of velocity = acceleration.
2. (b) Mechanical wave
Sound needs a medium to travel, so it’s a mechanical wave.
3. (b) is zero
In circular motion, force is towards center but displacement is tangential. Angle = 90°, so Work = Fd cos90° = 0.
4. (a) Malleability and ductility
Malleability = beaten into sheets, Ductility = drawn into wires.
5. (b) It is the centre of a hollow sphere of which the spherical mirror is a part
Definition of Centre of Curvature.
6. (c) Male gamete
Sperm is the motile germ cell.
7. (c) Gibberellic acid
Gibberellins promote stem elongation and remove genetic dwarfness.
8. (d) 1 m/s²
a = (v-u)/t = (10-5)/5 = 5/5 = 1 m/s²
9. (b) Universal indicator
Gives exact pH value with color chart. Litmus only tells acid/base.
10. (d) amphoteric
Al₂O₃ reacts with both acids and bases.
11. (c) Mercury
Hg is the only metal liquid at room temp.
12. (d) [H⁺] < 1 × 10⁻⁷ Mol/l
pH > 7 means alkaline, so H⁺ concentration < 10⁻⁷.
13. (d) Tetra-atomic
Phosphorus exists as P₄, so atomicity = 4.
14. (b) the oviduct
Also called Fallopian tube, carries egg from ovary to uterus.
15. (a) Meristem
Meristematic tissue has actively dividing cells.
16. (a) Modern Periodic Table
Modern Periodic Law: Properties are periodic functions of atomic numbers.
17. (b) Ethanol
Ethanol/Ethyl alcohol is used as solvent in tincture iodine, cough syrups.
18. (b) 18
M shell = 3rd shell. Max electrons = 2n² = 2×3² = 18.
19. (c) Placenta
Placenta connects embryo to mother’s blood for nutrition, gas exchange.
20. (a) 4 K
KE = ½mv². If v → 2v, then KE = ½m(2v)² = 4×½mv² = 4K.
21. (b) It is the point on the principal axis through which rays of light parallel to the principal axis pass after reflection or appear to be arising from this point on the principal axis
Definition of Principal Focus.
22. (c) 5.3 × 10⁻²³ g
O₂ molecular mass = 32 g/mol. Mass of 1 molecule = 32/(6.022×10²³) ≈ 5.3×10⁻²³ g.
23. (d) Potassium
K reacts violently with cold water. Fe, Al, Zn react only with steam/hot water.
General Science MCQs (24–49)
24. Which group of animals are exclusively free living marine animals?
(a) Mollusca
(b) Nematoda
(c) Arthropoda
(d) Echinodermata
25. Which of the following statements is true? The velocity of sound is:
(a) Less in summer than in winter
(b) More in summer than in winter
(c) Independent of seasons
(d) Same in winter and summer
26. According to Newlands' Law of Octaves, how many elements exist in nature?
(a) 66
(b) 65
(c) 56
(d) 55
27. If a ball is thrown vertically upwards with a velocity of 40 m/s, then what will be the magnitude of its displacement after 6 s? (Take g = 10 m/s²)
(a) 60 m
(b) 80 m
(c) 20 m
(d) 40 m
28. The universal natural auxin of plants is:
(a) IBA
(b) NAA
(c) IAA
(d) Citric auxin
29. Which of the following can undergo sublimation?
(a) Ammonium sulphate
(b) Ammonium sulphide
(c) Ammonium chlorate
(d) Ammonium chloride
30. Definition of Force can be stated from:
(a) Newton's first law of motion
(b) Newton's second law of motion
(c) Newton's third law of motion
(d) Newton's law of gravitation
31. Which of the following has low resistivity?
(a) Diamond
(b) Glass
(c) Ebonite
(d) Nichrome
32. Which of the following animals can change its sex?
(a) Planarian
(b) Nereis
(c) Ascaris
(d) Snail
33. When electricity is passed through an aqueous solution of Sodium Chloride (brine), it decomposes to form:
(a) NaOH + H₂ + Cl₂
(b) NaOH + H₂ + N₂
(c) NaOH + H₂ + O₂
(d) NaOH + HCl₂ + H₂
34. A man lifts a luggage of 25 kg from the ground and puts it on the head, 2.5 m above the ground. If the value of g = 10 m/s², the value of work done by him on the luggage is:
(a) 22.5 J
(b) 220 J
(c) 625 J
(d) 225 J
35.Growth hormones function:
(a) Rarely as growth promotors
(b) Sometimes as growth promotors and sometimes as growth inhibitors
(c) Always as growth inhibitors
(d) Always as growth promotors
36. Which permanent tissue makes a plant hard and stiff?
(a) Collenchyma
(b) Sclerenchyma
(c) Parenchyma
(d) Aerenchyma
37. A sound of single frequency is called a:
(a) Note
(b) Pitch
(c) Tone
(d) Hertz
38. Which of the following salts is acidic in nature?
(a) Sodium Carbonate
(b) Sodium Acetate
(c) Ammonium Phosphate
(d) Magnesium Sulphate
39. If I is the current through a wire and e is the charge of an electron, then the number of electrons crossing in t seconds will be given by:
(a) e/It
(b) Iet
(c) It/e
(d) Ite
40. The essential organs in a flower for reproduction are:
(a) The sepal and stamen
(b) The stamen and pistil
(c) The sepal and petal
(d) The petal and pistil
41. The energy stored in a dry cell is in the form of:
(a) Potential energy
(b) Nuclear energy
(c) Kinetic energy
(d) Chemical energy
42. One Watt = ?
(a) 1 erg/sec
(b) 1 Pascal/sec
(c) 1 m/s
(d) 1 joule/sec
43. The credit for classifying the elements on the basis of their atomic masses goes to:
(a) Dmitri Mendeleev
(b) John Dalton
(c) John Alexander Reina Newlands
(d) Johann Wolfgang Döbereiner
44. What will be the force of attraction between two bodies weighing 20 kg and 50 kg respectively, with a distance of 2 metre between them?
(a) 16.675 × 10⁻¹¹ N
(b) 166.75 × 10⁻¹⁰ N
(c) 6.67 × 10⁻¹¹ N
(d) 16.67 × 5 × 10⁻¹⁰ N
45. The tendency of undisturbed objects to stay at rest or to keep moving with the same velocity is called:
(a) Velocity
(b) Force
(c) Momentum
(d) Inertia
46. Which of the following metals does NOT react with cold or hot water?
(a) Sodium
(b) Potassium
(c) Calcium
(d) Aluminium
47. The pH value increase from 7 to 14 represents a:
(a) Decrease in OH⁻ ion concentration
(b) Increase in H⁺ ion concentration
(c) Decrease in H⁺ ion concentration
(d) Increase in OH⁻ ion concentration
48. Which of the following glows with special colour depending on the name of gas in the fluorescent tube?
(a) Plasma
(b) Hydrogen
(c) Bose-Einstein condensate
(d) Helium
49.Metals are placed on which side of the Modern Periodic Table?
(a) Top row
(b) Right side
(c) Bottom row
(d) Left side
Answers below page
General Science MCQs (24–49) – Answer Key
24. (d) Echinodermata
25. (b) More in summer than in winter
26. (c) 56
27. (c) 20 m
28. (c) IAA
29. (d) Ammonium chloride
30. (b) Newton's second law of motion
31. (d) Nichrome
32. (d) Snail
33. (a) NaOH + H₂ + Cl₂
34. (c) 625 J
35. (b) Sometimes as growth promotors and sometimes as growth inhibitors
36. (b) Sclerenchyma
37. (c) Tone
38. (d) Magnesium sulphate
39. (c) It/e
40. (b) The stamen and pistil
41. (d) Chemical energy
42. (d) 1 joule/sec
43. (a) Dmitri Mendeleev
44. (b) 166.75 × 10⁻¹⁰ N
45. (d) Inertia
46. (d) Aluminium
47. (d) Increase in OH⁻ ion concentration
48. (a) Plasma
49. (d) Left side of the Modern Periodic Table
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