NSMQ 2025 SPEED RACE TRIER CONTEST QUESTIONS AND ANSWERS.

1. What name is given to aerial plants that obtain nutrients from trapped organic matter?

Ans: Epiphytes

2. Name the site where the selective reabsorption of filtrate from the glomerulus occurs.

Ans: PCT – Proximal Convoluted Tubules and DCT – Distal Convoluted Tubules.

3. Arrange the following: Synaptic knob, Axon terminal, Axon, dendrites, Cell body in the accurate order of their association in electrical impulse movement.

Ans:  Dendrites, Cell body, Axon, Axon terminal, Synaptic knob.

4. If cot x = ¾, where x lies in the third quadrant, then find the value of sec² x

Ans: 25/9

5. Find the equation of the image of the circle (x + 2)² + (y – 5)² = 10 after a reflection in the origin

Ans: (x – 2)² + (y + 5)² = 10

6. Find the equation of the line passing through the point A (1, 2) and parallel to the line y = 3x – 1.

Ans: 3x – y – 1 = 0           or            y = 3x – 1

7. What is the minimum oxidation state of potassium?

Ans: 0

8. How many grams of Na₃PO₄ can be produced by the reaction of 1.25 × 10²³ formula units of NaOH with sufficient H₃PO₄? [ Na = 23.0, P = 31.0, O = 16.0]

Ans: 13.7 g

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9. The relative atomic mass of potassium is 39.1. Potassium has two main isotopes, K-39 and K-41. Which isotope of potassium is most abundant and why?

Ans: K-39.  Reason: If they were 50% K-39 and 50% K-41, the relative atomic mass would be exactly 40. With an average mass of 39.1, it must tell us that the K-39 will have an abundance of more than 50%.

10. A vertical spring with a spring constant of 20 N/m is stationary. A 12 kg mass is attached to the end of the spring. What is the maximum displacement that the spring will stretch?

Ans: 6.0 m

11. A parallel plate capacitor with plates of 4.0m^2, and the magnitude of charge on each plate is 5.0 C. What is the electric field between the plates?

Ans: 1.4 x 10¹¹N/C

12. The heat capacity of an object initially at 27 ℃ is 80 JK^-1. Find the final temperature of the object when it absorbs 640 J of heat.

Ans: ℃

13. For what value of k does the following pair of equations, x-ky = 2 and 3x + 2y = -5, have a unique solution?

Ans: k: k ≠ -2/3

14. If y = 2x² + 3, find the dy/dx at x = 4

Ans: 16

15. If x: 2 ≤ x ≤ 6 is the domain of the function, y = 3x – 10, find the range of the function.

Ans: y: -4 ≤ y ≤ 8

16. Name the land-based ecosystem that has the most abundant biodiversity?

Ans: Tropical Rainforest

17. What name is given to the bone mass decrease, especially in the vertebral column, which causes it to collapse?

Ans: Osteoporosis

18. Why are aquatic animals mostly ammoniotelic in nature, whereas terrestrial forms are not?

Ans:  Ammonia needs a large amount of water for its removal, as it’s toxic. To conserve water, terrestrials are adapted to produce less toxic nitrogenous wastes like uric acid and urea. In aquatic animals, water conservation is not important, and hence they excrete ammonia.

19. How many electrons are involved in the bond formation of N₂?

Ans: 6

20. State the value of Faraday’s constant to five (5) significant figures.

Ans: 96487 C/mol            or            9.6487 x 10⁴ C/mol

21. If C=12.0, H = 1.00, and O = 16.0, all in g/mol, determine the molecular mass of vinegar?

Ans: 60.0 g/mol

22. If the kinetic energy of a body decreases by 64%. Find the percentage change in its momentum.

Ans: -40% or decreases by 40%

23. A block rests on a smooth inclined plane making an angle of 30⁰ with the horizontal. The coefficient of static friction between the block and the plane is 0.8. If the frictional force on the block is 10N, determine the mass of the block.

Ans: 2 kg

24. A doubly charged lithium atom is equivalent to a hydrogen whose atomic number is 3. Determine the wavelength of required radiation for emitting an electron from the first to the third Bohr orbit in the Li²⁺ Give your answer to 3 sf

Ans: 114 Ȧ                           or            1.14 x 10^-8m       or 11.4 nm

25. Some plant seeds need to pass through the digestive system of heterotrophs or consumers to germinate. What name is given to this process?

Ans:  Scarification

26. What name is given to the competition type where two or more species compete for a limited resource?

Ans: Interspecific competition

27. State the difference between the matrix of bones and cartilage.

Ans: The matrix of bones is inflexible/hard (contains osteon and contains calcium salts), whereas the matrix of cartilage is flexible (may or may not have calcium salts).

28. The speed of an object changes from 20 m/s to 15 m/s. What is the ratio of its final KE to the initial KE.

Ans: 9/16            or 0.5625

29. A series RC circuit connected across a 300 V, 100Hz supply has a resistor of 10.0 Ω and a capacitor of reactance 6.0 Ω. Find the impedance.

Ans: 12 Ω

30. A nuclear power plant produces 13 kV at a rate of 0.02^-1 in 20s. What is the magnitude of power dissipated by the plant?

Ans: 5.2 kW

31. A quadratic equation has zeros at x = 3 and x = -6 and passes through the point (2, -24). Give an expression to represent the quadratic equation.

Answer: ² + − =           or 3(x – 3)(x + 6)                do not accept + 3 − 18 = 0

32. A chord of a circle is equal to the radius. Determine the angle the chord makes with the radius at the center.

Ans: 60⁰

33. The stationary point of the graph of y = ax² + bx + c is point A (0, 0). Find a and b.

Ans: a = 1, b = 0

34. Based on the source, name the two types of acids

Ans: mineral acids (inorganic acids) and organic acids

35. Consider the following enthalpy changes: all in KJ/mol. H_f(CO₂) = -392, H_f(H₂O) = -285, H_c(CH₃CH₂CH₃) = -2220. Use the information to determine the enthalpy of formation of propane.

Ans: 105KJ/mol

36. Arrange the following in increasing acidity: CH₃COOH, H₂O, H₂CO₃, and C₂H₅

Ans: H₂O < C₂H₅OH < H₂CO₃ < CH₃COOH

37. What name is given to the type of electrochemical cell where electrical energy from an external source is used to drive a non-spontaneous chemical reaction?

Ans: electrolytic cell

38. During an electrolysis experiment, a current of 5.0 A is passed for 24 hours. Calculate the number of moles of electrons transferred.

Ans: 4.5 mol of electrons

39. What is the sum of all coefficients of reactants and products in a balanced equation of aluminium hydroxide reacting with phosphoric acid?

Ans: 6

40. Find the derivative of 3 sin (x/3)

Ans: cos (x/3)

41. Given the vectors u = 3i + 2j and v = -i + 4j, find u – 2v

Ans: 5i – 6j

42. John is reading a 600-page novel. In the past 5 days, he has read 250 pages. If he continues reading at the same rate, how many more days will it take him to complete the novel?

Ans: 12 days

43. During a chemical reaction, 800J of heat is absorbed by the system from the surroundings. At the same time, the system performs 500J of work on its surroundings. Calculate the energy change for this process.

Ans: 300 J

44. In acoustics, what name is given to any frequency higher than the fundamental frequency of a sound?

Ans: Overtone

45. Take the charge of one electron as 1.60 x 10^-19 A current of 45mA flows through a resistor for 10 minutes. How many electrons have flowed through the resistor during this time?

Ans: 1.69 x 10²⁰ electrons

46. What name is given to the separation of homologous chromosomes or sister chromatids during meiosis, ensuring that each daughter cell receives the correct number of chromosomes?

Ans: Disjunction

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47. In genetics, what name is given to an organism that has two identical alleles for a particular gene, both of which are the recessive form?

Ans: homozygous recessive

48. Name the main vegetative propagule of bamboo.

Ans: rhizomes

49. What is the molecular geometry of the ozone molecule?

Ans: bent or V-shape

50. How many moles of potassium ions are in 75.0 cm³ of 0.25 mol/dm³ potassium sulfate solution?

Ans: 0.038 moles

51. What is the sum of all coefficients of reactants and products in a balanced equation of potassium sulphate with sodium hydroxide?

Ans: 6

52. Given the vectors a = 2i + 3j and b = 3i – 5j. find 5a + 2b

Ans: 16i + 5j

53. If sin x = 3/5, evaluate cosec²x – cot²x

Ans: 1

54. Two events C and D are such that P(C) = 0.4, P(D) = 0.3, and P(C∩D) = 0.2. Find P(DUC)

Ans: 0.5

55. Name the genus of bacteria that is characterized by the lack of a cell wall and known to be among the smallest bacterial cells.

Ans: Mycoplasma

56. Name the type of movement exhibited by Physarum, a genus of slime molds

Ans: amoeboid movement (use of pseudopodia)

57. The life cycle of Trypanosoma species typically involves two hosts. Name them

Ans:  an insect vector and a vertebrate host (human or animal)

58. You drive for 40 minutes at 90 km/h and then stop for 20 minutes. You then drive for 50 minutes at 70 km/h. What is your average speed for the entire trip?

Ans: 65 km/h

59. Find the force on a test charge of 5 x 10^-9 C placed at a point where an electric field of 3.0 x 10⁴ N/C exists

 Ans: 15 x 10^-5N

60. Cesium-137 has a half-life of 30 years. What fraction of the original sample would remain at the end of 90 years?

Ans: 1/8

61. A 50 J of energy is stored in an inductor when the current flowing through it changes from 4.0A to 10.0 A. What is the inductance of the inductor?

Ans: 1.2 H (henry)

62. What is the SI unit for potential energy?

Ans: joule

63. What name is given to the minimum amount of energy required to remove an electron from the surface of a material to a point immediately outside the material?

Ans: Work function

64. What name is given to the number of sets of chromosomes present in the nucleus of a cell?

Ans: ploidy

65. What structure in the cockroach is responsible for the secretion of digestive juice?

Ans: hepatic caeca

66. What name is given to the specific arrangement or order of nucleotides within a nucleic acid molecule, such as DNA or RNA?

Ans: Nucleotide sequence

67. The half-life of Po-218 is three minutes. How much of a 20.0-atom sample will remain after 15.0 minutes?

Ans: 0.625 atoms

68. What is the unit of the rate constant (k) in a third-order reaction?

Ans: mol^-2dm⁶s^-1               or            M^-2 s^-1

69. Find the sum of the coefficients of all reactants and products in a balanced equation of zinc phosphate and lead (III) oxide.

Ans: 8

70. Evaluate tan (-330^o)

Ans: √3/3

71. A curve is defined by the equation: y = x² – 4x² + 3x. Find the coordinates of the points at which the curve crosses the x-axis.

Ans: (0,0), (1,0), and (3,0)

72. Find the equation of the tangent to the curve y = 2x³ – 3x² + 4x – 1 at the point (1,2)

Ans: y = 4x –2

73. What name is given to the collective term for all the petals of a flower?

Ans: corolla

74. What name is given to the tube-like structure that carries sound waves to the eardrum?

Ans: ear canal (auditory canal)

75. What is the main function of the human ear?

Ans: detect and interpret sound waves

76. An object moves from rest along a straight line with a constant acceleration of 5.0 m/s². What is the speed of the object after 12 s?

Ans: 60 m/s

77. Find the mass of 0.250 m³ of a substance whose density is 5,000 kg/m³

Ans: 1,250 kg

78. Find the magnitude of the impulse of a constant 720 N force that acts for 5.0 s.

Ans: 3.6 x 10³Ns

79. Find the equation of the line 4x + 3y = 7 after a reflection in the line y = x

Ans: 3x + 4y = 7

80. Find the length of an arc of a circle 15 cm and subtending an angle of measure π/3 radians at the center of the circle.

Ans: 5π cm

81. Find a and b such that: 3x = a(x – 4) + b(x – 1)

Ans: a = -1, b = 4

82. Determine the sum of the stoichiometric coefficients of all reactants and products present in a balanced equation of the reaction: H₃PO₄ → H₄P₂O₇ + H₂

Ans: 4

83. Given that the atomic mass of Mg is 24.0 g/mol, P = 31.0 g/mol, and O = 16.0 g/mol, calculate the molecular mass of magnesium phosphate

Ans: 262 g/mol

84. How many milligrams are present in 7.8 kg of an organic compound?

Ans: 7.8 x 10⁶ mg

85. Determine the sum of coefficients of all reactants and products in the balanced equation for: NH₃ + O₂ → NO + H₂O

 Ans: 19 (Balanced equation: 4NH₃ + 5O₂ → 4NO + 6H₂O)

86. Calculate the molar solubility of salt XY₂ given its Ksp = 3.2 × 10^-14

Ans: 2.0 × 10⁻⁵ mol/dm³

87. State the physical state at room temperature and normal atmospheric pressure of the hydrocarbon: 3-hexene

Ans: liquid

88. What phylum does a millipede belong to?

Ans: Arthropoda

89. What is the actual common name of the animal often called a “flying fox”?

Ans: Fruit bat

90. Plants can be classified by their growth forms and habitats. Give the primary growth habitat of lettuce

Ans: herbaceous

91. Give the SI base unit for the Gravitational constant, G

Ans: m³kg^-1s^-2

92. Find the Young’s modulus of a material if it undergoes 0.0050% strain under 600.0 Pa stress.

Ans: 12 MPa (Formula: Y = Stress/Strain = 600 / 0.00005 = 12,000,000 Pa = 12 MPa)

93. Find the greatest possible efficiency for a heat engine operating between 27°C and 127°C.

Ans: 25%

94. The ratio of an interior angle to an exterior angle of a regular polygon is 5:1. Find the number of sides

Ans: 12

95. A biased die is thrown twice, and the probability of an even number appearing is twice the probability that an odd number appears. Find the probability that 3 and 6 appear.

Ans:  4/81

96. Identify the unique characteristic common to these elements based on their symbols: Tin, Silicon, Sulphur

Ans: All symbols contain the letter “S”

97. Name any two classes of organic compounds that contain nitrogen

Ans: amines, amides, nitriles, amino acids

98. Determine the sum of the coefficients of all reactants and products in the balanced equation for the reaction between solid aluminium metal and aqueous hydrochloric acid solution

Ans:13

99. Express 3x + 12x + 7 in the form A(x + B)² + c

Ans: 3(x + 2)² – 5

100. Find the nth term of an arithmetic progression if S_n = 3n² − 5n

Ans: U_n = 6n – 8

101. Find the least and greatest value of y = |x − 10x + 20| in the domain {x: −1 ≤ x ≤ 4}.

Answer: The Least value is 4, and the greatest value is 31

102. What branch of science does a scientist who studies volcanoes practice?

Ans: Volcanology

103. What animal class does a salamander belong to?

Ans: Class Amphibia

104. Which of the following animal groups exhibits bilateral symmetry: jellyfish, earthworms, starfish, and sponges?

Ans: earthworm

105. A divergent lens of focal length 20.00 cm forms a virtual image of a paraxial object. Find the object distance if the image is 30.00 cm from the lens.

Ans: 60.00 cm

106. Find the shortest wavelength in the X-rays produced by 2.0 kV electrons. Take Planck’s constant = 6.0 x 10^-34Js, the speed of light = 3.0 x 10⁸m/s and the electron charge = 1.6 x 10^-19C

Ans: 5.6 x 10^-10m

107. Describe the displacement-time graph of a particle moving along the x-axis given that: The particle accelerates uniformly at 2 m/s² from rest (starting at the origin at t = 0).

Ans: The graph is a parabola opening upwards, starting at the origin (0,0), with increasing slope over time.

108. Give two advantages of the exoskeleton in arthropods.

Ans: Supports and shapes the body (structural integrity), Acts as a barrier against pathogens (prevents infections), and prevents water loss

109. State the 2 main hormones produced by the ovaries?

Ans: Oestrogen and Progesterone.

110. What is the target organ of insulin?

Ans: Liver

111. Find the kinetic energy of a rotating object with a moment of inertia of 0.50 kg·m² at 3.0 rad/s.

Ans: 2.3 J

112. A pendulum completes 50.0 oscillations in 72.0 seconds. What is its period?

Ans: 1.44 s

113. A concave mirror has a focal length of 15 cm. An object is placed 20 cm from the mirror. Calculate the image distance.

Ans: 60 cm

114. Find the truth set of (x² − x − 5)^(x-4) = 1

Ans: {x: x = −2, 3 or 4}

115. Find a Cartesian equation in x and y, given x = 2 cos t and y = 4 sin t

Answer: x²/4 + y²/16 = 1

116. Find the sum of the coefficients, including x^o in the expansion of (2 + x)⁵.

Ans: 243

117. What is the concentration of 500 cm³ of an H₂SO₄ solution with pH 2?

Ans: 0.005 mol/dm³

118. Calculate the mass of Al₂O₃ present in 0.250 mol

Ans: 25.5 g

119. Determine the sum of the stoichiometric coefficients of all reactants and products in a balanced equation of the combustion reaction of 1-propanol.

Ans: 25

120. Mention the type of digestive tract in insects like grasshoppers.

Ans: complete digestive tract

121. Name the insulating layer that speeds up nerve impulse transmission in neurons.

Ans: Myelin sheath.

122. Name the organ where fertilization typically occurs in humans.

Ans: fallopian tube.

123. Find the linear momentum of a 3.0 kg object moving at 10.0 m/s in the direction 3.0i – 4.0j

Ans: 18i – 24j kg.m/s

124. A simple harmonic oscillator completes 30 oscillations in 6 seconds. What is its frequency?

Ans: 5 Hz

125. An object starts from rest and accelerates at 0.5 m/s. Find its velocity at t=4.

Ans: 2 m/s

126. Determine the sum of stoichiometric coefficients in the balanced equation for the reaction involving the decomposition of potassium chlorate

Ans: 7 [2KClO₃ → 2KCl + 3O₂]

127. Name the straight-chain hydrocarbon with 3 carbon atoms and 5 hydrogen atoms and a methyl substituent on the middle carbon

Ans: 2-methylpropene

128. Calculate the mass of 350 millimoles of potassium nitrate (KNO₃).

Ans: 35 g

129. Find the equation of a line passing through the point (3, -5) and perpendicular to = −3 + 6

Ans: =   x/3 − 6                        3 = − 18

130. If ⁿ₂ = 190, find the value of

Ans: = 20

131. If ( − 2) = + 1, find ()

Ans: () = + 3

132. A plant has cambium in its vascular tissue, and pollen is produced in the male cone. The plant disperses seeds but does not produce fruit. In what phylum does this plant belong?

Ans: Coniferophyta

133. What name is given to the arrangements of petals and sepals in a floral bud?

Ans: Aestivation

134. Distinguish between passive and active transport in terms of the concentration gradient.

 Ans:  In Active Transport, molecules move through the cell membrane against the concentration gradient, whereas molecules move along(down) the concentration gradient in Passive Transport.

135. A geometric progression is such that the third term is 8 times the sixth term, and the sum of the first six terms is 31½. Find the first term of the progression.

Ans   ∶   a=16

136. Solve 2cos² (3x – π/4) = 1, for 0 ≤ x ≤ π/3

Ans∶ π/3   or   1 .0 5

137. Find the coefficient of x in the expansion of (1 + 2x)(2 – 3x)⁶

Ans∶ 1008

138. Which alcohol typically produces a carboxylic acid when heated with acidified potassium dichromate?

Ans: Butan-1-ol

139. What is the sum of the integer coefficients when propene undergoes complete combustion?

Ans: 2, 3

140. 0cm³ of an aqueous solution of sodium hydroxide of pH = 10 is mixed with 990.0 cm³ of distilled water. What is the pH of the resulting solution?

Ans: 8

141. An object is placed at 0.06m from a convex lens of focal length 0.1m. Calculate the position of the image.

Ans: -15cm

142. A monochromatic light of wavelength 280nm is incident on an isolated metallic sphere of radius 9cm. The work function of the metal is 2.4eV. Find the maximum charge that can be given to the metal sphere.

 Ans: 20 pC

143. The acceleration of free fall of a mass of 2.0 Kg close to the surface of Mass is 3.6ms^-2. What is the gravitational field strength at the surface of Mars?

Ans: 3.6 NKg^-1

144. In Euglena, how do we call the specialized plastids that enable it to synthesize organic compounds from inorganic substances and contain chlorophyll, responsible for photosynthesis?

Ans: Chromatophore

145. What property of water makes it suitable for transport in eukaryotic organisms?

Ans: Solvent Properties

146. What structure is also known as the Malpighian Body?

Ans: Renal Corpuscle

147. A committee of 8 people is to be chosen from 7 men and 5 women. Find the number of different committees that could be selected if the committee contains at least 3 men and at least 3 women.

Ans: 420

148. What is the oxidation half-equation in the redox reaction: 2S₂O₃^2- _(aq) + I_2(aq) => S₄O₆^2- _(aq) + 2I^– _(aq).

Ans∶   2S₂O₃^2-_(aq) =>  S₄O₆^2-_(aq) + 2e_(aq)

149. What is the relative formula mass of Mg(NO₃)²

Ans∶ 148 g

150. A fluorescent light tube has an internal volume of 400cm³ and an internal pressure of 200 kPa. It is filled with 0.03 mol of an ideal gas. What is the temperature of the gas inside the fluorescent light tube?

Ans: 3.21 x 10² K

151. The radius of a flywheel is 10 cm. It is rotated at the rate of 25rad^-2. If a constant force of 40N is applied on the rim of the wheel along its tangent, what is the moment of inertia of the wheel?

Ans∶ 0.16 Kgm^-2

152. A ball is tossed vertically upwards with a speed of 5.0ms^-1. After how many seconds will the ball return to its initial position?

Ans∶ 1.0 s

153. A 60Kg block hangs from a wire that has a cross-sectional area of 2mm2. The wire was originally 4m long but stretched by 3cm under the load. What is the Young’s Modulus of the wire?

Ans∶ 4 × 10¹⁰ Pa                 or            4×10¹⁰ Nm^-2

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