ROUND ONE: FUNDAMENTAL CONCEPTS
Preamble: Describe nematodes with respect to the following:
1. Type of coelom Answer: pseudocoelomate
2. Shape Answer: cylindrical
3. Type of segment Answer: unsegmented
4. Common name Answer: roundworm
Preamble: Consider the ionization energies (IE) of the given elements, all in kJ/mol
1. 𝐼𝐸1 = 498.8 𝐼𝐸2 = 4596.2 𝐼𝐸3 = 6910.3 𝐼𝐸4 = 9543
If the element is a period three element, use the IE values to identify the element
Answer: Sodium
2. 𝐼𝐸1 = 577.5 𝐼𝐸2 = 1816.7 𝐼𝐸3 = 2744.8 𝐼𝐸4 = 11577
If the element is a main group element, use the IE values to identify the group of the element
Answer: Group 3 or Group 13
3. 𝐼𝐸1 = 737.7 𝐼𝐸2 = 1450 𝐼𝐸3 = 7732.7 𝐼𝐸4 = 10543
If the element is a period three element, use the IE values to identify the element
Answer: Magnesium
4. 𝐼𝐸1 = 1086.5 𝐼𝐸2 = 2352.6 𝐼𝐸3 = 4620.5 𝐼𝐸4 = 6222.7 𝐼𝐸5 = 37831
If the element is a period two element, use the IE values to identify the element
Answer: Carbon
Preamble: Find the work done when the point of application of the constant force 𝑭 undergoes the
displacement 𝒅.
1. 𝑭 = (−8.0𝒊̂ + 4.0𝒋̂) N and 𝒅 = (4.0𝒊̂ + 𝟓. 0𝒋̂) m. Answer: −𝟏𝟐 𝐉
𝑊 = 𝑭 ⋅ 𝒅 = −32 J + 20 J = −12J
2. 𝑭 = (6.0𝒊̂ − 9.0𝒋̂) N and 𝒅 = (6.0𝒊̂ + 4.0𝒋̂) m. Answer: 𝟎
3. 𝑭 = (6.0𝒊̂ − 3.0𝒋̂) N and 𝒅 = (7.0𝒊̂ + 3.0𝒋̂) m. Answer: 𝟑𝟑 𝐉
4. 𝑭 = (9.0𝒊̂ + 𝟐. 0𝒋̂) N and 𝒅 = (3.0𝒊̂ + 6.0𝒋̂) m. Answer: 𝟑𝟗 𝐉
Preamble: Given the polynomial function f(x) = 2x3 + 6x2 + 7x + 20, evaluate
1. f(2) – f(1) Answer: 39
2. f(-2) – f(-1) Answer: -3
3. f(1) – f(-1) Answer: 18
4. f(-2) - f(1) Answer: -21
Preamble: For the function y = x2 + bx + c, find the values of b and c with the given gradient and
minimum value.
1. Gradient = 2x – 2 and minimum value at zero Answer: b=-2, c=1
2. Gradient = 2x – 6 and minimum value at -1 Answer: b=-6, c=8
3. Gradient = 2x + 4 and minimum value at -9 Answer: b=4, c=-5
4. Gradient = 2x – 8 and minimum value at -4 Answer: b=-8, c=12
If b is correct, 1 pt and c 2pts
1. A particle of mass 3. 6 × 10−16 kg undergoes Brownian motion. Find the ratio of its root-
mean-square speed at 480 K to its root-mean-square speed at 120 K.
Ans: 𝟐:1 𝑣1 /𝑣2 = √𝑇1 /𝑇2 = √(480 K)/(120 K) = 2
2. A particle of mass 1.6 × 10−16 kg undergoes Brownian motion. Find the ratio of its root-
mean-square speed at 800 K to its root-mean-square speed at 50 K.
Ans: 𝟒:1
3. Find the ratio of the root-mean-square speed of a particle of mass 9× 10−14 kg to the
root-mean-square speed of a particle of mass 4× 10−14 kg both of which undergo
Brownian motion at 300 K.
Ans: 2: 𝟑 𝑣1 /𝑣2 = √𝑚2 /𝑚1
4. Find the ratio of the root-mean-square speed at 640 K to the root-mean-square speed at
80 K of a particle undergoing Brownian motion.
Ans: √𝟖: 1
1. Calculate the mass of oxygen gas discharged in the electrolysis of dil CuSO4 solution using
when 0.20 Faraday of charge has been passed.
Answer: 1.6 g
2. Calculate the mass of solid gold that will be deposited in the electrolysis of Au3+ solution
using pure and impure gold as electrodes when a charge of 0.20F has been passed. Au = 197.
Answer: 13 g
3. Calculate the volume of oxygen gas liberated at S.T.P when dilute H2SO4 is electrolysed, using
inert electrodes after passing 0.50 Faraday. Molar volume of a gas at S.T.P is 22.4 dm3.
Answer: 2.8dm3
4. Calculate the charge that must passed through the cell in order for the anode to lose 12.8 g of
mass assuming all the loss is due to disappearance of copper. Take Cu = 64g/mol.
Answer: 0.40 F
1. A nerve cell transmits its impulse to another through which structure?
Answer: Axon
2. Which cells directly transmit action potentials to the optic nerves?
Answer: Ganglion cells
3. Which structure generally transmit nerve impulse only to the cyton/cell body?
Answer: Dendrite
4. The characteristic of a nerve cell that relates directly to its function is called
Answer: Long extensions
ROUND TWO: SPEEDRACE
1. Name the energy that is required to form gaseous cations from gaseous atoms?
Answer: Ionization energy
2. At 25 ° C, the solubility product of an aqueous solution of mercury (II) bromide is 3.2×10– 11.
Determine the value of the molar solubility of bromide ions in solution.
Answer: 2.0 × 10– 4 𝐦𝐨𝐥 𝐝𝐦−𝟑
3. The simplest type of base contains OH− ions. Which of the following compounds is more
likely to be a base, CH3OH or KOH? Explain your answer.
Answer: KOH is ionic and is a base. CH3OH is covalently bonded and is not a base.
4. Determine the equation of a tangent at the point (4, 3) to the curve x2 + y2 = 4
Answer: 4x + 3y = 25
5. Find the first term a and the common difference d of an AP whose 6th term is 17 and 15th
term is 44
Answer: a = 2 d=3
6. Find the x-intercepts for the circle given by the equation: (𝑥 − 3)2 + (𝑦 + 5)2 = 106
Answer: -6 and 12
7. What is the function of synovial membranes?
Answer: Synovial membranes are connective tissue membrane that supports mobility in
joints
8. Name the retina cells that allows us to see coloured objects.
Answer: Cone cells
9. Why are primary producers sometimes referred to as transducers?
Answer: because they do not generate energy. Instead, these plants transform and then
transfer the energy to other trophic levels of their ecosystem.
10. Two masses 𝑚1 = 5.0 𝑘𝑔 and 𝑚2 = 4.6 𝑘𝑔 tied to a string are hanging over a light
frictionless pulley. What is the acceleration of the masses when lifted to move freely?
Answer: 0.42 m/s2
11. A turning fork arrangement (pairs) produces 4 beats per second with one fork of frequency
288 Hz. A little wax is placed on the unknown fork and then it produces 2 beat per second.
What is the frequency of the unknown fork?
Answer: 292 Hz
12. During a light experiment with plane mirrors, a student wanted to produce four (4) images
using two mirrors, at what angle must the mirrors be placed to each other?
Answer: 72⁰
ROUND 3: TRUE OR FALSE
1. The elongation stage of plant cell growth is mostly dependent of water absorption
Answer: True
2. Water is also a metabolic end product of respiration
Answer: True
3. Water also acts as a temperature factor since it has an exceptionally high boiling point
Answer: False
4. Water helps cell to retain their tensile strength and provide proper shape to the cell
Answer: True
5. Chitin structurally resembles cellulose but substitutes an N-containing group for one _OH
Group
Answer: True
6. Mycelia generally tend to grow slowly
Answer: False
7. Fungal spores, whether sexual or asexual, generally are surrounded by a tough coat and are
distinctly coloured
Answer: True
8. The asexual spores known as conidia are extremely large
Answer: False
9. Covalent bonds are formed between gases and liquids only
Answer: False
10. Polar covalent bonds are formed when a dipole is created between the atoms in a bond
Answer: True
11. A nonpolar bond is formed when two electrons are shared unequally between two atoms
Answer: False
12. A covalent bond arises from an electrostatic attraction of the nuclei of an atom for a shared
pair of electrons
Answer: True
13. 200 cm3 of 0.0500 M HCl solution has the same pH as 100 cm3 of 0.100 solution
Answer: False
14. A solution of pH 0 does not exist
Answer: False
15. An HCl solution with concentration of 1.0 x10-8 M is likely to be alkaline
Answer: False
16. Ammonia and aniline has pKb values of 4.76 and 9.40 respectively. This implies that the
anilium ion is a better acid than the ammonium ion
Answer: True
17. The electrical insulator contains no electrons
Answer: False
18. An electrical insulator always contains more protons than electrons
Answer: False
19. An electrical insulator becomes an electrical conductor when made to carry excess electrons
Answer: False
20. Electrons in an electrical insulator move rapidly throughout the insulator
Answer: False
21. The focal length of a pin hole camera is proportional to the diameter of the pin hole
Answer: False
22. The smaller the size of the pin hole of a pin hole camera the sharper the image produced by
the camera
Answer: True
23. The smaller the size of the pin hole of a pin hole camera the smaller the image produced
Answer: False
24. The smaller the distance between the screen and the pin hole of a pin hole camera, the
sharper the image the camera produces
Answer: False
25. sin−1(sin210°)=210° Answer: False
26. cos−1(cos145°)=145° Answer: False
27. tan−1(tan120°)= 120° Answer: False
28. sin−1(sin60°)=60° Answer: True
29. Any two rectangles are similar Answer: False
30. An equilateral triangle is similar to an equiangular triangle Answer: True
31. An equiangular hexagon is similar to an equilateral hexagon Answer: False
32. All regular pentagons are similar Answer: True
ROUND FOUR: RIDDLES
I am a fundamental scientific theory
I was proposed by two scientists but unfortunately for me, I never their names like other theories in
science
I am a theory that marked a great conceptual advancement in biology after 1838.
Even though, the microscope was invented in the 16th Century, its poor quality delayed my
formulation for over 200 years.
I am the theory that renewed attention to living processes that goes on in cells
In my unified form, I state that; all living organism are composed of one or more cells; the cell is the
basic unit of life and all cells arise from existing cells.
Who am I?
Answer: Cell Theory
I am a number.
Timelines have shown my development throughout the world.
I was first recorded and appeared in Mesopotamia around 3 B.C
I can be thought of as equilibrium in numbering.
I am an arithmetical symbol denoting the absence of all magnitude or quantity
In mathematical terminology, I am the additive identity of the integers,
Who am I?
Zero
I am an oxide
I am the most commonly cited amphoteric oxide
I am a binary molecule with atomicity of three
I am one of the most plentiful and essential compounds, existing in the gaseous, liquid, and solid
states
Well, life is believed to have originated from me, in the world’s oceans.
Who am I?
Answer: Water
I am position defined relative to an object or system of objects
Typically, I lie on lines (or planes) of symmetry of objects
My motion with respect to an object can be described by an application of Newton's second law
I am the closest position of the mass in an object.
I am the average position of all the parts of the system, weighted according to their masses
When an object is in a uniform gravitational field, I am the same as the centre of gravity
Who am I?
Answer: Center of mass
