NSMQ 2024 SPEED RACE PAST QUESTIONS AND ANSWERS.

1. Name the blood vessel that supplies blood to the lungs

Ans:       The pulmonary artery

2. Name the excretory organ in invertebrates that performs the work of a kidney

Ans:       Nephridium

3. What is the dominant vegetative generation of a land plant

Ans:       Sporophytes

4. What name is given to a microscopic infectious agent, such as a bacterium or a virus

Ans:       Microbe

5. What name is given to the process of busting a follicle when an egg is released from the ovary

Ans:       Ovulation

6. What is the volume of a box of length 5cm, breadth 2cm, and depth 0.5cm

Ans:       5cm³

7. Find the magnitude of the force that is exerted at a 200 Pa pressure when it acts perpendicular to and uniformly over a surface area of 2m²

Ans:       400N

8. What is the difference between the total kinetic energy before and after an elastic collision

Ans:       Zero difference

9. What volume of a 0.40moldm^-3 solution of HBr would be required to completely neutralize 60 cm³ of 0.30 moldm^-3 of NaOH solution

Ans:       45cm³

10. Determine the sum of the stoichiometric coefficients of all reactants and products present in the balanced equation of the reaction NH₃ + O₂ →           N₂    +     H₂O

Ans:       15

11. How many atoms are present in the empirical formula of 2-methyl-butene

Ans:       17

12. Simplify (x²  – 2x – 15) / (x² – 4x – 5)

Ans:       (x+3) / (x+1)

13. The binary operation *is defined on the sets of integers z by m*n = m² + n² – 3mn. Evaluate 3*2

Ans:        -5

14. Name the root system present in rice

Ans:       Fibrous root system

15. What type of crop is carrot

Ans:       Root

16. What is the volume of the cube of the side 2m

Ans:       8m³

17. Find the magnitude of the impulse of a 15N force that acts for 3.0s

Ans:       45Ns

18. How are many significant figures are there in 0.0560Vm^-1

Ans:       3

19. How many neutrons will be produced from the bombardment of U-239 with neutron assuming the daughter nuclide formed are Kr-94 and Ba-139

Ans:       7 neutrons

20. Determine the sum of the stoichiometric coefficient of all reactants and products present in the balanced equation of the reaction: ZnS + O₂ → ZnO + SO₂

Ans:       9

21. What is the observation state of manganese in the hydrates Mn(OH)₄.H₂O.

Ans:       +4

22. Find the power dissipated by a 20Ω resistor when the current through it is 0.5A

Ans:        5Watt

23. Find the resistance of a resistor which decipated 16Watt when the current through it is 2A

Ans:       4Ω

24. Find the power decipated by 10Ω resistor when the current through it is 2A

Ans:       40Watt

25. Find the resistance of the resistor which decipated 18Watt when the current through it is 3A

Ans:       2Ω

PREAMBLE: In gymnosperms

26. Name one type of cones they possess

Ans:       Pollen cone

27. There are two types of cones name the order

Ans:       Seed cone

28. What name is given to pollen grains

Ans:        Microgametophyte

29. On which part of the vinnocone are the ovules formed

Ans:       On the upper surface of the scale

PREAMBLE:

30. Name one of the first four structures or tissues from the outside of the transverse of the menopause roots

• Epidermis
• Root hair
• Cortex
• Endodermis

31. Find the coefficient of x³ in the expansion of (1 + 2x)⁶

Ans:       162

32. P, Q and R are simple statement with P(true), Q(false), and R(true). Find the truth value of P and implies R

Ans:       True

33. The linear transformation T:(x, y) → (2x+y, x-2y) → P(x, y) → A(1,3). Find the coordinate of P

Ans:       1, -1

34. Name the mostly commonly abuse drug

Ans:       Alcohol

35. What kind of circulatory system is processed by grasshopper?

Ans:       Open circulatory system

36. Name the cavity that contains the lung

Ans:       Pleural cavity

37. A gas occupying a volume 450cm³ at 200KPa expands to 1200cm³, determine the new pressure in the container if temperature remains constant

Ans:       750 KPa

38. Determine the sum of the stoichiometric co-efficient of all reactants and products in a balance equation of the reaction NH₃ + O₃ → NO + H₂O

Ans:       19

39. How many hydrogen atoms are present in aliphatic alkyne with 13 carbon atoms?

Ans:       24

40. Simplify (√5 – √3) / (√5 + √3)

Ans:       4 – √15

41. Given the vectors A= 5i-3j, B= 3i-12j, find the length of the vector A+B

Ans:       17units

42. A particle is the projected vertically up with initial speed 20m/s find how long it takes to return to the point

Ans:       4s

43. What is the power dissipated by a 15Ω resistor when the voltage across it is 9.0V

Ans:       5.4W

44. Find the quantity of heat liberated when the temperature of an object of heat capacity 18J/K decrease by 4.0K

Ans:       72J

45. Find the object distance required for a real image 15cm on a concave spherical mirror of focal length 10cm

Ans:       30cm   

46. What will be the new volume of the solution if 50cm³ of a 0.45moldm^-3 solution of NaOH is diluted to a concentration of 0.25moldm^-3

Ans:       90cm³

47. Determine the sum of the stoichiometric coefficient of all reactants and products in a balanced equation of C₈ H₈ + O₂ → CO₂ + H₂O

Ans:       23

48. A radionuclide of an alkane metal undergoes an alpha-decay, which group of the periodic table will the resulting daughter nuclide be decayed

Ans:       Group 17

49. Round in decreasing order of partial at a depth of 1m in an opened tank of a fluid gasoline, water, mercury, and greaserol

Ans:       Mercury, greaserol, water, gasoline

50. Name the type of motion in which a particle moves in a plane in such a manner that its distant on a fixed point remain constant

Ans:       Circular motion

51. Find the change in linear momentum of a particle on which a constant net force 32KN acts for 5s

Ans:       160KNs

51. How many legs has a fibre

Ans:       8

52. What part of the crab is called the Chilin

Ans:       The pincers

53. Where is the most edible part of the lobster located

Ans:       Abdomen

54. Considering A (x-3) + B (x+2) = x-13 as an identity when A and B

Ans:       A=3 and B=-2

55. Solve the equation 2^2x – 5(2^x) + 6 = 0

Ans:       x = log₂ 3 and x=1

56. In a kite, find the length of the diagonal if one diagonal is twice the other and the area is 49cm²

Ans:       7cm and 14cm

57. Calculate the percentage of nitrogen in ammonia nitrate NH₄NO₃

Ans:       35%

58. Determine the sum of stoichiometric equation of reactants and products in a balanced equation of reaction C₄H₄ + O₂ → CO₂

Ans:       12

59. Name the second most abundant element in the universe

Ans:       Helium

60. Name the structure in crabs used for gaseous exchange

Ans:       Gills

61. Name one of the two optical lenses in the eyes

Ans:       Cones and rods

62. What is the name of the most protruded part of the nose

Ans:       Tip

63. A 4.0kg particle moving at 3.0m/s collides with a stick to a stationary 2.0kg object

Ans:       2.0 ms^-1

64. Find the volume of a sphere of radius exactly 3mm leaving your answer as a multiple of π

Ans:       36πmm³

65. Find the number of digit when the decimal number 220 is converted to binary form

Ans:       8

66. Find the area of the finite area bounded by the line 2x + 5y = 20 and the axis

Ans:       20 square unit

67. Solve the equation log₂ x = 3

Ans:       8

68. Rank in the increasing order of density lead, iron, aluminium

Ans:       Aluminium, iron, lead.

69. What is the nature of a fish gill?

Ans:       It’s feathery

70. What fish is used to make the delicacy called “kobo” in Ghana

Ans:       Tilapia

71. Name the material traditionally used to stack mattresses in Ghana

Ans:       Grass

72. Find the common ratio r of an exponential sequence with consecutive terms (x-6), (x-2), x.

Ans:       r=1/2

73. simplify (√7-√5) / (√7+√5)

Ans:       6 – √35

74. A and B are two independent events with P(A) = 0.5 and P (B) = 0.6. Find P (A∪B)

Ans: 0.8

75. Convert 72.0km/h into m/s

Ans:       20.0m/s

76. Give the dimensions of the physical quantity whose S.I unit is metres cube per second

Ans:       L³ T^-1

77. What mass of a 7.2g sample of a radioisotope will remain after10.4hrs? If its half-life is 2.6hrs.

Ans:       0.45g

78. Determine the sum of stoichiometric coefficient of reactants and products in a balanced equation of the reaction: HNO₃ + C → H₂O + CO₂ + NO₂

Ans:       12

79. To which IUPAC group does mercury (Hg) belong?

Ans:       Group 4

80. Calculate the time it takes for a radioactive particle to decay 100g to 6.25g given that it has a half-life of 3.50 hours

Ans:       14.0 hours

81. Calculate the percentage by mass of oxygen in calcium carbonate

Ans:       48%

82. A compound is represented by CₓHᵧO. What are the values of x, y, and z if it’s the 4th member of the homogeneous series of alcohol

Ans: x = 4, y = 10 and z = 1

83. State Kirchhoff’s Law of Blackbody radiation?

Ans: Kirchhoff’s Law of Thermal Radiation states that for anybody in thermal equilibrium, the ratio of its emissive power to its absorptivity is equal to the emissive power of a perfect black body at the same temperature

84. Water escapes from a small hole near the bottom of a large tank containing water to a depth of 88.2 . Find the speed at which the water escapes from the hole.

Ans:        . ⁻

85. What is the magnitude of the impulse of a 18 force that acts for 15 ?

Ans:       0.27

86. A linear transformation is defined by M: (x, y) → (3x – 2y, 5x – 3y) find M^-1, the inverse of M

Ans:       M^-1: (x, y) → (-3x + 2y, – 5x + 3y)

87. A cube has base length 6cm. Find the area of the cube

Ans:       216cm²

88. What is the end product of glycolysis in aerobic conditions?

Ans:       Pyruvate

89. What is the main constituent of the cell membrane bilayer?

Ans:       Phospholipids

90. Name the agent of dispersal for silk cotton.

Ans:       wind.

91. Name the phylum Rhizopus belongs?

Ans:       Zygomycota

92. What is the largest exocrine gland called?

Ans:       Liver

93. Which organelle is the site for aerobic respiration in the cell?

Ans:       mitochondria.

94. A 0.4 mC charged particle moves at 4 m⁻¹ in a uniform 5 magnetic field. Find the magnitude of the force on the particle if the angle between the field and the velocity of the particle is 30°.

Ans:       4 mN

95. A 3.00g object moving at 6.00 m^-1 collides head-on with and becomes attached to a stationary 2.00g object. Find the total kinetic energy of the objects after the collision.

Ans:       32.4 J

96. Give the number of emission lines that can be observed for a gas of hydrogen atoms in which atoms are excited to the state with quantum number = 6.

Ans:       15

97. Find the angles of a triangle if the measures are (x – 30)°, (2x + 25)° and (x + 45)°

 Ans:      5°, 95°, 80°

98. Find the value of p if 135_p = 59₁₀

Ans:       p = 6

99. The solubility of a compound X with formula mass 80 g/mol is 0.3 mol/dm³ at 30°C. If 300 cm³ of a hot solution containing 11.1 g of the compound is allowed to cool to 30°C, how much solid will be deposited?

Ans:       3.9g

100. What is the molar mass of the third member in the homologous series of Alkanoic acids

Ans:       74g/mol

101. Give the name of a symmetrical ether with 6 carbon atoms

Ans:       Dipropyl ether. OR Propoxy propane

102. Name the vector for river blindness

Ans:       Blackfly

103. What is the skeleton of corals composed of?

Ans:       Calcium carbonate

104. Why do cartilage and cornea respond slow to healing upon getting injured?

Ans: They lack capillaries or blood supply / They have limited ability to cell regeneration

105. The compound with molecular formula C₅H₁₂O₂ is a diol (two –OH groups), with only one methyl group, and the hydroxyl groups are not on the same carbon. Give two possible isomers of the compound;

Answers:

• 2-Methyl-1,2-butanediol
• 2-Methyl-1,3-butanediol
• 2-Methyl-1,4-butanediol
• 3-Methyl-1,2-butanediol
• 3-Methyl-1,3-butanediol

106. Oxygen effuses 3 time faster than a compound T2O. What is the atomic mass of element T

Ans:       136g/mol

107. In a titration of Na₂CO₃ against dilute HCl, using methyl orange as indicator, 20.0 cm³ of the base required 24.0 cm³ of 0.10 mol/dm³ HCl. Calculate the concentration of the base.

Ans:       0.060 mol/dm³

108. Given that x = tan and y = sec² , express y in terms of x

Ans:       y = 1 + x²

109. Find the number of permutations of the word PENCILS which begin with the letter and end with the letter S.

Ans:       120

110. Find the mass of hydrogen present in 3.4 g of dodecane.

Ans:       0.52 g

111. Find the pH of a weak acid solution with pKa of 6.0 and a concentration of 4.0 x 10^-1M.

Ans:       3.4

112. Find the molar mass of the gas that effuses 8 times slower than helium.

Ans:       256 g/mol

113. Name the part of the brain stem that is responsible for involuntary actions that are essential for supporting life

Ans:       Medulla Oblongata

114. What term describes genetic phenomenon where a single gene influences multiple, seemingly unrelated traits in an organism?

Ans:       Pleiotropy

115. What term describes the largest non-living reservoir of carbon in the Earth’s long-term carbon cycle?

Ans:       Lithosphere

116. Give the exact value of Faraday’s constant with its appropriate SI unit.

Ans:       95485.33212 C/mol

117. What is the term given to the process by which peacocks make colourful patterns on their feathers?

Ans:       Iridescence

118. A disc rotating with a constant angular acceleration of 5.0rad/s² attains an angular velocity of 5.0rad/s at t = 2.0 s, find the angular velocity of the disc at t = 8.0s.

Ans:       35 rad/s

119. Find the sum of the first 43 odd whole numbers.

Ans:       1849

120. Find the constant term in the expansion of (2x² + l/x⁵)⁷

Ans:       672

121. Factorize completely the cubic polynomial f(x) = 5x³ – 3x² – 20x + 12

Ans:       (x + 2)(x – 2)(5x – 3)

122. Name the joint that is found between the teeth and adjacent bone?

Ans:       Gomphosis

123. Name the typical structure of the scolex of armed tapeworms that has characteristic hooks which may be retractable?

Ans:       Rostellum

124. Organisms of the Class Trematoda are commonly known as?

Ans:       Flukes

125. How many odd numbers are there between 10 and 40?

Ans:       15

126. Find the maximum points of the function, f(x) = x³ − 6x² + 9x + 2.

Ans:       (1, 6)

127. What is the number of lines of symmetry of a regular nonagon?

Ans:       9

128. Find the period of a simple pendulum which has a length of 1.62m.

Ans:       2.55s

129. Which forms of energy are conserved when a glass marble is released from a height and collides elastically with a glass surface?

Ans: Kinetic energy and total mechanical energy (do not accept just mechanical energy)

130. What is the electron geometry and the molecular geometry of nitrous acid?

Ans:       electron geometry: trigonal planar molecular geometry: bent

131. The pKa values for phosphoric acid is 2.16, 7.21, and 12.32. What is the pH at the 2nd equivalence point?

Ans:       9.77

132. Determine the sum of the coefficients of all reactants and products in a balanced equation of the reaction: O₂ + NH₃ → H₂ + N₂O

Ans.       13

133. The compound 2,2,4-trimethyl pentane is considered a standard for good fuel. How many atoms are present in the empirical formula of this compound?

Ans.       13

134. An electrochemical cell cannot supply electricity indefinitely, why?

Answer:

This is because the potentials at the anode and cathode reduce with time due to problems of local action and polarization ultimately reducing the emf of the cell.

135. Apart from the Musci and Liverworts, which other class exists in Bryophytes?

Ans:       Hornworts (or Anthocerotae)

136. What neurotransmitter is most commonly associated with muscle stimulation at neuromuscular junctions?

Ans:       Acetylcholine

137. What structure connects the two hemispheres of the brain?

Ans:       Corpus callosum

138. A 20.0 g sample of a radioactive element has a half-life of 10.0 days. How much of the sample remains after 30.0 days?

Ans:       2.50g

139. A large motor in a factory causes the floor to vibrate at a frequency of 10.0 Hz. The amplitude of the floor’s motion near the motor is 3.0 mm. Find the maximum acceleration of the floor near the motor.

Ans:       12m/s²

140. A uniform meter rule balances horizontally when supported at 45.0 cm from end A. If the rule has a mass of 40.0 g, where should a 60.0 g mass be placed to balance the rule, assuming it’s placed on the rule?

Ans:       48.3cm from A

141. Find the sum of the first 15 squares.

Ans:       1,240

142. What is the name given to the male gametophyte of a moss?

Ans:       Antheridium

143. How many heart chambers does a lizard have?

Ans:       3

144. What is the basic unit of the central nervous system?

Ans:       Neuron

145. What is the sum of the interior angles of a regular polygon with 31 sides?

Ans:       5220^o

146. In a brewery, tap A can fill the large tank to half the maximum capacity in 2 hours whiles tap B can empty the fully filled tank in 6 hours. If both taps are in operation how long will it take for the tap to be half empty?

Ans:       6 hours

147. After a vector product operation is made on two vectors, the final vector obtained is perpendicular to the initial vectors. Which operation was made?

Ans:       cross product

148. A car is parked on a steep inclined plane overlooking the ocean when its brakes fail, and it begins to coast downwards. Starting from rest at t = 0, the car rolls down the incline with a constant acceleration of 4.0ms⁻², travelling 50.0m to the edge of a vertical cliff. The cliff is 30.0m above the ocean. Determine the time interval elapsed when it arrives at the edge of the cliff.

Ans:       5.0s

149. Vector A has a positive x component of 3.0 units and a negative y component of 2.0 units. What vector B, when added to vector A, gives a resultant vector with no x component and a negative y component of 4.0 units?

Ans:       -3.0i – 2.0j

150. In a Cartesian frame of reference, the potential energy of an object is given by U(x) = 5x – 4x where (U) is in Joules and (x) in meters. In addition to the origin, what is the position where the object is in equilibrium? Give your answer to 2 decimal places.

Ans:       0.83m/s

151. 10.0cm³ solution of 1.0 moldm^-3 are diluted to 100cm³. Calculate the change in pH.

Ans:       1.0

152. Describe the expected observation when H₂S gas is bubbled through a solution of Ca²⁺ ions.

Ans:       No precipitate is formed or no observable change

153. What will be the difference between the cathode ray generated when oxygen in the tube is replaced with CO₂?

Ans:       No difference

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