NSMQ2024 1/8th Stage: Sample Past Questions and Answers: SET 05.

Preamble: State the main organ system in humans that performs the following primary function.

1. Regulates the body systems and development.

Ans: The endocrine system.

2. Defends the body against infection.

Ans: Immune system.

3. Transports materials through the body and regulates body temperature.

Ans: The circulatory system.

Preamble: Determine the number of neutrons in nuclide X.

4. When nitrogen-14 is bombarded with an alpha particle, a proton is formed together with nuclide X.

Ans: Nine neutrons.

5. When aluminum-27 is bombarded with an alpha particle, a neutron is formed together with nuclide X

Ans: Fifteen neutrons.

6. When calcium-40 is bombarded with a neutron, an alpha particle is formed together with nuclide X.

Ans: Nineteen neutrons.

Preamble: Give the biological term to which the given description refers

7. A leaf tissue composed of columnar chloroplast-bearing cells.

Ans: The palisade mesophyll.

8. A leaf whose blade is divided into several distinct leaflets, the leaflets are attached to the midrib, giving the appearance of a feather or a comb.

Ans: Pinnate.

9. The part of the vascular bundle extending from the base of the leaf to its connection with a vascular bundle in the stem is responsible for transporting water, nutrients, and sugars between the leaf and the stem.

Ans: the leaf trace

10. Preamble: Give the systematic name of one alkyl-substituted isomer of C₅H₁₁

Ans:

• 2-bromo – 2 – methylbutane.
• 2 – bromo – 3 – methylbutane.
• 1 – bromo – 2 – methylbutane.

Preamble: Give the most common laboratory method or technique employed for the given process.

11. Purification of impure solid aspirin.

Ans: Recrystallization.

12. Obtaining an aggregate of salts from seawater.

Ans: Evaporation

13. Extraction of essential oils that are thermolabile.

Ans: steam distillation

Preamble: An object is projected from ground level at 15 degrees to the horizontal.

14. Find the maximum horizontal range of the object for an initial speed of 40ms^-1.

Ans: 80m

15. Find the initial speed of the object required for a maximum horizontal range of 720m.

Ans: 120ms^-1.

16. Find the horizontal range for an initial speed of 20ms^-1.

Ans: 20m

Preamble: Name the plant tissue described.

17. It is formed inwardly by the cork cambium, and it is opposite the cork.

Ans: phelloderm

18. The first root of the plant develops in continuation of the root tip or radical of the embryo.

Ans: The top root or primary root

19. A structure found at the base of the embryo of many vascular plants that plays a crucial role in the development of the embryo by pushing it into the nutrient-rich tissue of the female gametophyte.

Ans: the suspensor

20. Preamble: Give one systematic name of one substituted isomer of hexane.

Ans:

• 2-MethylPentane
• 3-MethylPentane
• 2-2-Dimethylbutane.

Preamble: Indicate the quantity of nuclei in the cells of the given type of muscle.

21. Smooth

Ans: single-nucleated

22. Skeletal

Ans: Multinucleated.

23. Cardiac

Ans: single-nucleated

Preamble: How many three-letter arrangements can be made from the letters A, B, C, D, E, F, G, H, if;

24. All three letters are different.

Ans: 336 ways

25. All three letters are identical.

Ans: 8 ways

26. Letters may be repeated.

Ans: 112 ways

27. In which form is calcium present in plants?

Ans: Calcium pectate

28. Give the main feature of pneumatic bones that adapt beds for flight.

Ans: They are hollow

29. Name the chordate characteristic feature that develops into the bony spine.

Ans: The notochord.

30. A radionuclide has a half-life of 9.2 minutes. Given an initial amount of 96.0g, what mass of the radionuclide decays in 55.2 minutes?

Ans: 94.5g

31. What is the mass of 3.00 moles of ethane-1,2-diol?

Ans: 186g

32. Find the magnitude of the acceleration of a 0.5-kilogram object on which the net force, 15 J minus 20 J N, acts.

Ans: 50m/s

33. The middle of a stretched string fixed between two posts 2m apart is plucked gently. Find the wavelength of the fundamental mode of the subsequent vibration of the string.

Ans: 4m

34. Find the stationary point of the curve Y = X/X + 1.

Ans: Has no stationary point.

35. Determine the formula for a sulfur fluoride that contains 21.95% sulfur.

Ans: SF₆.

36. Given the equilibrium concentrations of NO₂ and N₂O₄ are 0.025 moldm^-3 and 0.040 moldm^-3, respectively, calculate the equilibrium constant with units for the gaseous reaction 2NO₂ in equilibrium with N₂O₄.

Ans: 64moldm^-3.

37. Calculate the EMF of the cell formed when the half-cells BA²⁺/BA and CA²⁺/CA have respective reduction potentials of -2.906 volts and – 2.86 volts are connected.

Ans: + 0.038 volts

38. Calculate the frequency of the fundamental transverse vibration mode of a stretched 0.625m string fixed at both ends, given that the speed of transverse waves on the string is 64.0m/s.

Ans: 51.2Hz

39. A particle moving at 25m/s collides with a stationary 4.0kg particle, and the two particles take off together at 15m/s. What is the mass of the incoming particle?

Ans: 6.0kg

40. Find the potential of a conducting sphere of radius 0.30m with a net charge of 16 picocoulombs.

Ans: 0.48volts

41. How many high-energy terminal bonds are present in ATP?

Ans: 2

TRUE/FALSE

1. The reaction of sodium with water is slow at room temperature but can be vigorous upon heating.

Ans: False

2. The reaction of sodium with water is more violent than the reaction of potassium with water.

Ans: False

3. The reaction between sodium and water is redox, where sodium is oxidized and water is reduced.

Ans: True

4. Heat transfer by conduction involves the transport of atoms or molecules.

Ans: False

5. Heat transfer by conduction can only occur in liquids.

Ans: False

6. Whenever heat transfer by conduction occurs, heat transfer by radiation cannot occur.

Ans: False

Preamble: Smooth muscles are responsible for;

7. Contraction of the wall of the heart.

Ans: False

8. Movement of food from the stomach to the small and large intestine and then to the colon.

Ans: True

9. Transmission of electrical impulse signals from one part of the body to another.

Ans: False

Preamble: An arc subtends an angle of 30 degrees at the center of a circle of radius 1cm. The length of the arc is

10. 30 centimeters.

Ans: False

11. 15 centimeters.

Ans: False

12. Pi over three centimeters.

Ans: False

13. The boiling point of a liquid is defined as the temperature at which its vapor pressure equals the external atmospheric pressure.

Ans: True

14. As the vapor pressure of a liquid decreases, its boiling point decreases.

Ans: False

15. A liquid with a high vapor pressure will have a lower boiling point than a liquid with a low vapor pressure.

Ans: True

Preamble: A particle moves along a straight line with constant acceleration.

16. The speed of the particle increases if its acceleration is positive.

Ans: False

17. The speed of the particle decreases if its acceleration is negative.

Ans: False

18. The velocity of the particle is positive if its acceleration is positive.

Ans: False

Preamble: A hermaphroditic flower must possess the;

19. Perianth and gynoecium.

Ans: False

20. Calyx and the androecium.

Ans: False

21. Calyx and the perianth.

Ans: False

Preamble: If the equation ax² + by² +2fx + 2gy + c = 0 represents a circle  then;

22. a = b.

Ans: True

23. c = 0.

Ans: False

24. f = g.

Ans: False.

Preamble: An object moves with constant speed;

25. The object moves with zero acceleration.

Ans: False

26. The object moves with constant acceleration.

Ans: False

27. The object moves with constant velocity.

Ans: False

Preamble: The given postulate of Dalton’s atomic theory has limitations.

28. Atoms of the same element are identical in every respect.

Ans: True

29. Atoms of different elements are different in all respects.

Ans: True

30. Compounds are formed by a combination of two or more different kinds of atoms.

Ans: False

Preamble: The given mammalian organ exchanges substances between the internal environment of that organ and the blood.

Ans: False

Ans: True

Ans: True

Preamble: The angle between two concurrent forces of equal magnitude is increased from zero degrees to 180 degrees.

34. The magnitude of the resultant of the two forces is greatest when the angle between them is zero degrees.

Ans: True

35. The magnitude of the resultant of the two forces is minimum when the angle between them is 90 degrees.

Ans: False

36. The angle between the resultant of the two forces and any of them is 60 degrees when the angle between the forces is 120 degrees.

Ans: True

37. In the solid state, nonmetals are generally brittle and have higher densities than metals.

Ans: False

38. The chemical reactivity of metals decreases from left to right across a period and down a group of the periodic table.

Ans: False

39. Generally, metalloids have properties of elements around them in the periodic table.

Ans: True

40. If an embryo sac lacks synergids, the pollen tube will be unable to form.

Ans: False

41. If an embryo sac lacks synergids, fertilization will not occur because the synergid isn’t the egg.

Ans: False

42. If an embryo sac lacks synergids, fertilization will occur, but the embryo will not be able to grow.

Ans: False

Source: Galmeek.com

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