NSMQ 2025 TRIER QUESTIONS AND ANSWERS; (RIDDLES ONLY).

#01.

I am a theorist in science, specifically chemistry.
I was put forward by Heitler and London in 1927, but later improved and developed by L. Pauling and J.C. Slater in 1931.
My theory is based on the knowledge of atomic orbitals and electronic configurations of elements, the overlap criteria of atomic orbitals, and the stability of molecules
I am a bond theory, but I do not predict shape or bond angles.
I assume that the electrons occupy atomic orbitals instead of molecular orbitals.
In contrast to VSEPR, I am used to describing the chemical bonding of the molecule.
A major point of my state is that, bond is formed due to the interaction of only the valence electrons as the two atoms come close to each other

Who am I? Valence Bond Theory

#02

I am a term often used when discussing volcanic eruptions, biodiversity, and internet communications.
In biodiversity, I was given or name by Norman Myers in 1988.
Later on, Conservation International adopted me and gave a broader definition criterion.
I am a biogeographic region with significant levels of biodiversity that is threatened with destruction.
For a region to be described as me, it must meet two strict criteria: it must contain at least 0.5% or 1,500 species of vascular plants as endemics, and it has to have lost at least 70% of its primary vegetation.
I am a region characterised both by exceptional levels of plant endemism and serious levels of habitat loss.

Who am I? (Biodiversity) Hotspot

#03

I am a three-dimensional solid
I occupy the biggest space, but have the smallest surface area.
I have no edges
The set of all my points in space lies at the same distance from a given point.
I am the geometric figure generated by the revolution of a semicircle about its diameter.
I am also called the second cousin of a circle because every plane section through me is a circle.

Who am I? Sphere

#04

I am a type of periodic motion
In my motion, the distance from the axis of rotation remains constant at all times.
My projection on the x-axis undergoes simple harmonic motion
My acceleration has a constant magnitude, points radially inwards and perpendicular to the velocity at basically four different points in the orbit
Consider the motion of electrons around the nucleus in an atom, and you know me
I describe the motion of a body traversing a circular path at constant speed

Who am I? Uniform Circular Motion.

#05

I am a popular term referring to the deposition of a mixture from wet and dry components.
I was first studied systematically in Europe in the 1960s, and in the United States and Canada, the following decade
However, in 1852, Robert Angus Smith first showed the relationship between me and atmospheric pollution in Manchester, England
I am a product of pollution
I am caused by a chemical reaction that begins when compounds like sulphur dioxide and nitrogen oxides are released into the air.
I have adverse impacts on forests, freshwaters, and soils, killing insect and aquatic life-forms, as well as causing damage to buildings and having impacts on human health
I am any form of precipitation possessing a pH of about 5.2 or below.

Who am I? Acid Rain

#06

Right from the onset of this contest, I have been among you
I am one of the many interacting biotic and abiotic factors that affect community structure, species diversity, and population dynamics
I occur within and between a population, and am an important factor in natural selection.
In a population, I lower the fitness of both organisms involved, since the presence of one of the organisms always reduces the amount of the resource available to the other.
I occur when interacting species require a resource that is in limited supply, such as food, water, or territory.

Who am I? Competition

#07

I am a graphical representation of the distribution of quantitative data
I have only one variable
I show the frequency distribution of data points across a continuous range of numerical values
I am used to checking the shape of the data distribution.
In my representation, the values are grouped into bins or buckets that are arranged in consecutive order along the horizontal x-axis at the bottom of the chart.
I am a chart involving rectangles whose area is proportional to the frequency of a variable, and the width is equal to the class interval
In my representations, all the rectangles are adjacent since the base covers the intervals between class boundaries.

Who am I? Histogram

#08

I am a known quantity in Chemistry and in Physics. I am a measured quantity
My dimensions are ML²T^-2A^-2
I am commonly represented by an acronym
My name suggests I am a force, but I am rather an amount of electrical work which is equal to the terminal potential difference when no current flows.
If I am the voltage developed by any source of electrical energy, such as a battery or photovoltaic cell

Then who am I? Electromotive force

#09

I am a solution often used in the laboratory
I could be acid or basic, an oxidant or a reductant, a salt or other compound that can be neutralised through titration
I am not a standard solution and therefore, called the solution of interest sometimes
In a titration experiment, I am mostly placed in the volumetric flask and not in the burette.
I am the solution with an unknown concentration in a titration experiment.

Who am I? Titrand or analyte

I am a geometric figure
I am one of the seven (7) convex quadrilaterals
My diagonals are of equal length
My diagonals divide each other into segments of equal length.
My opposite angles are supplementary
I am a quadrilateral with congruent base angles and the non-parallel sides congruent.

Who am I? Isosceles trapezium

#10

I am a term widely used in optics and botany
In optics, my numerical value is a description of the angle of light at which the object can be viewed
I am the first characteristic to be considered when identifying pollen grains
In botany, I am of two types: pores and fissures (colpi), which, the stomata, are an example of me.
I am a thin or missing part of the exine, which is independent of the patterning of the exine.
I am the place where the pollen tube can break through the pollen wall.
I am the opening in an optical system which restricts the size of the bundle of rays incident on a given surface.

Who am I? Aperture

#11

I am a physical quantity
I am used to the description of the motion of an object
I am one of several components of kinematics
I am a change with respect to time.
There are only two ways to have me: change in speed or change in direction, or change in both.
For motion on a circle, I always present even if the speed is constant, because the direction is continually changing.
If I am the second derivative of displacement with time,

Then who am I? Acceleration

#12

I am a chemical compound
I have other names, such as waterglass
I am a widely used compound in the formulation of cements, coatings, etc
I am also used in silica gel production
My first element is found in group 1
My other element is silicon and oxygen

Who am I? SODIUM SILICATE

#13

I am a three-digit number
I am three of a kind
I read the same; however, you read me
My sum is 12
My factorization is 2² x 3 x 37
My digits are all even numbers

Who am I? FOUR HUNDRED AND FORTY-FOUR

#14

I am a chemical agent
I kill microorganisms
I can also stop the growth of microorganisms
Examples of me include: antibiotics, antifungals
My main classes are disinfectants and antiseptics

Who am I? ANTIMICROBIAL (AGENTS)

#15

My name in Latin means centre and to seek
I am a type of force
My direction is always orthogonal to the motion of the body
In Newtonian mechanics, gravity provides me causing astronomical orbits
If I am a force that makes a body follow a curved path,

Who am I? CENTRIPETAL FORCE

#16

I am an eukaryotic organism
I am a unicellular ciliate
I am widespread in freshwater, brackish, and marine environments
Because of my usefulness in research, I am characterised as a ‘white rat’ of the phylum Ciliophora
If I belong to the family Paramecia,

Who am I? PARAMECIUM

#17

We are complexes.
We are junctions.
We are mostly found in tissues experiencing intense mechanical stress.
We are randomly arranged on the lateral sides of the plasma membrane.
As you all were intensely researching, in preparation for this Mega contest, you probably might have chanced on my Latin name, that is, “maculae adherents”.
We are intercellular junctions that provide strong adhesion between cells.

So, who are we? Desmosomes

#18

I am a common reagent in analytical chemistry.
For those who love laboratory analysis, whenever and wherever oxidation, and for that matter, strong oxidation is involved, you often call on me.
I am odourless.
Mungo Ponto discovered that paper treated with me was visibly tanned.
I am a red-orange crystalline solid.
Chemical analysts occasionally refer to me as Bichromate of Potash.

So, who am I? Potassium Dichromate

#19

I am an odd composite number.
I am a three-digit number.
The hexadecimal of me is 157.
I am a palindromic number.
My prime factorisation is the cube of a single distinct digit prime number preceding the second single-digit cube number.

So, who am I? 3 4 3

#20

As an important parameter, I am used as an indicator of structural changes of substances that may include association and dissociation effects, binding of coenzymes, temperature effects, melting of tRNA, etc.
In molecular applications and as such, in polymer physics, I am employed in describing the dimensions of a polymer chain.
In data analysis, I am used to calculating many different statistics, including the spread of geographical locations.
When one tries to understand how a certain group of social media users, including you people, use various platforms such as Twitter, Instagram, Facebook, etc, my ‘code of ethics’ is imperative.
In Mechanics, about a given axis, I can be calculated in terms of the mass moment of inertia around that axis and the total mass.
Mathematically, I am the root mean square distance of the object’s parts from either its centre of mass or a given axis, depending on the relevant application.

So, who am I? Radius of Gyration

#21

I am a principal, but well, you can refer to me casually as a law.
The first person to have established my code of ethics and operations was the American physiologist Henry Pickering Bowditch in 1871, when he was studying and analysing the contraction of the heart muscle.
As a matter of fact, he observed that an induction shock produces a contraction or fails to do so according to its strength.
Later on in 1909, Neuroscientist Keith Lucas would find me in operation in the skeletal muscle where the individual fibres of the nerves would respond to stimulation based on me.
With me, there is no in-between; the nerve cells should either respond to a stimulus completely or not at all.

So, who am I? All-or-None law/Principle

#22

I am a three-digit number
I one equivalent to one gross
I am the number of square inches in a square foot
I am the 12th Fibonacci number
The sum of my digits is 9
I represent a dozen dozens
If I am the square of 12,

Then who am I? ONE HUNDRED AND FORTY-FOUR (do not accept 144)

#23

I am an inorganic compound
I am a colourless gas in organic synthesis
I am highly reactive towards water
I am produced industrially by direct chlorination of boron oxide and carbon
I am also known as trichloroborane
If I am a compound with a trigonal planar geometry and a bond angle of 120°,

Then who am I? BCl₃or BORON TRIFLUORIDE

#24

I am a physical quantity
My SI unit was named after Michael Faraday
My reciprocal is elastance
I am the capability of a material or device to store electric charge
If my SI unit is farad,

Then who am I? CAPACITANCE

#25

I am an autoimmune disease
I affect the thyroid
I am the most common cause of hyperthyroidism
I often result in an enlarged thyroid
My symptoms include thickening of the skin on the shins and eye bulging
My name may sound like a word relating to the cemetery
If I also experience irritability, muscle weakness, sleeping problems and a fast heartbeat,

Then who am I? GRAVES’ DISEASE

#26

I can be understood in many ways
You may describe me as the amount of material with a given thickness that would be necessary to fashion a model of a shape
Or the amount of paint necessary to cover a surface with a single coat
I am a two-dimensional analogue of the length of a curve or the volume of a solid
I am a measure of a region’s size on a given surface
If my SI unit is the square metre,

Who am I? AREA

#27

I am a chemical element
I have a one-letter symbol
I exist at standard conditions as a pale-yellow diatomic gas
I am extremely reactive, but do not react with the light inert gases
I am a period 2 element
If I am the lightest halogen,

Who am I? FLUORINE

#28

I am derived from the Latin word, which means candle
This is because I measure light intensity
I am an SI unit
I am analogous to radiant intensity
I measure luminous power per unit solid angle emitted by a light source in a particular direction
If I am the SI unit for luminous intensity,

What is my symbol? Ans: cd

#29

I am a vitamin
I consist of a group of 8 fat-soluble compounds
My deficiency is rare and usually due to an underlying problem with digesting dietary fat
I am an antioxidant
Foods rich in me include: seeds and nuts, seed oils, peanut butter, and margarine
If I am also referred to as tocopherols,

Who am I? VITAMIN E

#30

I am a functional group in organic chemistry
I am classified as primary, secondary, and tertiary
I am also called a peptide bond when I occur in proteins
I can occur as a side chain in amino acids such as asparagine and glutamine
I am a derivative of a carboxylic acid
Examples of me are: benzamide, formamide, and acetamide

Who am I? AMIDE or AMIDE FUNCTIONAL GROUP or ORGANIC AMIDE or CARBOXAMIDE.

#31

I am a 3-digit number
The sum of my digits is 6
In Roman numerals, I am represented as CCXIII
In base 2, I am represented as 11010101 in base 2
My last two digits are the atomic number of aluminium
If my first digit is even and my last digit is odd,

Who am I? TWO HUNDRED AND THIRTEEN (do not accept 213)

#32

I am an instrument
To be specific, I am a measuring instrument
I am usually connected in parallel
I usually have a high resistance
I may be analogue or digital
If I measure the electric potential in an electric circuit,

Who am I? VOLTMETER

#33

I am a physical phenomenon
A straight line is crucial for my occurrence since I am a phenomenon of shadows
I happen when three celestial bodies align perfectly
I occur when Earth passes between two others, casting a shadow for the third
I can be total or partial

Who am I? Lunar Eclipse

#34

We are a group of organisms
Our name is a historical misclassification
We belong to one of the earliest eukaryotic kingdoms
We predate complex multicellular life
Our movement is unique among eukaryotes
Thus, we use pseudopods, cilia or flagella in ways distinct from animals
If we include both heterotrophs and mixotrophs,

Who are we? PROTOZOA

#35

I am born from a marriage of metal and halogen
I’m violently allergic to water and air
I’m the key to extending carbon chains and
Hence, my reaction with carbonyls builds complex molecules.
Though I attack polar bonds aggressively, I ignore nonpolar ones
I require an alkyl halide and magnesium to exist.
Victor Grignard, who discovered me, received a Nobel Prize for that
If I am a reagent,

Then who am I? GRIGNARD REAGENT (R-MgX)

#36

I am a 2-digit odd number
I am made up of two prime numbers
The difference between my digits is 5
I am a perfect cube
If the sum of my digits gives a perfect square,

Who am I? TWENTY-SEVEN

#37

I am a chemical element
Though rare on Earth’s crust, my alpha glow lurks unseen in the night
I am a metalloid with no stable isotopes
Hence, I am a radioactive element
I was previously used in anti-static brushes, but was later banned due to my lethality
I was named in 1898 to honour the homeland of Marie Curie
If my most well-known and commonly referenced isotope has a mass number of 210,

Who am I? POLONIUM

#38

I am in the final stage
I am an essential component of natural conception
I involve the involuntary contractions of the pelvic floor
I am normally linked with orgasm
The speed at which I occur is measured to be an average velocity of 28 mph
I am a normal part of male human sexual development
If I am the discharge of semen from the penis through the urethra,

Who am I? EJACULATION

#39

I involve topics covered in the field of fluid dynamics
I also involve subfields such as gas dynamics
My understanding only dates back to the 17th century, but my forces have been harnessed by humans for thousands of years
My force was used constantly in sailboats and windmills
Sir Isaac Newton became the first person to develop a theory about my concept
Do you know of the Bernoulli’s principle and the Euler equations?
They have a great deal to do with me
My name in Ancient Greek means air and dynamic
If I am the study of the motion of air, particularly when affected by solid objects such as an aeroplane wing,

Then who am I? AERODYNAMICS

#40

I describe a current score or amount
I am also stuck on which notches are made to keep account or score
I am the act of scoring a point in a game or contest
I am a record in a series of fires
I consist of four vertical lines, cancelled diagonally or horizontally by a fifth one
I am a way of recording and counting frequencies in statistics,

Who am I? Tally

#41

I am a dairy product
I am produced in a range of flavours and textures
I comprise proteins and fat from milk
To produce me, milk is usually acidified, and either the enzymes of rennet are added
This will cause the casein in the milk to coagulate
The solid curd is then pressed into the finished product
I contain a high amount of fat, protein, calcium and phosphorus with a long shelf-life
I am loved very much by the mouse

Who am I? CHEESE

#42

I am a physical process
I am essential for Earth’s water ballet
My enthalpy change is always positive
My rate depends on the vapour pressure rise
Have you heard of the Clausius-Clapeyron equation?
Well, I have something to do with that equation
If boiling and evaporation are types of me,

Then who am I? VAPOURIZATION

#43

I am a dimensionless quantity
When I am low, flows tend to be dominated by laminar flow
However, when I am high, flows tend to be turbulent
This turbulence results from differences in the fluid’s speed and direction
I am a number that helps to predict fluid flow patterns in different situations
This is possible by measuring the ratio between inertial and viscous forces
My concept was introduced by George Stokes.

Who am I? REYNOLDS NUMBER

#44

I am a 3-digit palindromic number
All my digits are odd
My middle digit is an identity
My first digit is a prime
If the sum of the digits is seven,

Who am I? THREE HUNDRED AND THIRTEEN (do not accept three one three)

#45

I am an SI unit
I am equal to the product of an SI derived unit and an SI base unit
I am a unit of action
I appear in quantum mechanics within the definition of the Planck constant
I am a unit of angular momentum
If my SI base unit is kg. m²s^-1,

Then who am I? JOULE-SECOND

#46

I am one of the species of bacteria
I cause a chronic disease
I am a curable infectious disease
I damage the peripheral nerves as well as the skin, eyes, nose and muscles
I am also known as the Hansen’s bacillus
I am a rod-shaped bacterium and an obligate intracellular parasite
If I am the bacteria that causes leprosy,

Who am I? MYCOBACTERIUM LEPRAE or LEPROSY BACILLUS

#47

I am an inorganic salt
I have a very bright, red-orange colour
The metal in my oxyanions has an oxidation state of +6
In an acid solution, my anion can be reduced to an ion of the +3 state
However, in an alkaline solution, my anion produces chromium (III) hydroxide
My salt is used in oxidation reactions in organic chemistry
If the cation of my salt is an element in group 1,

Who am I? POTASSIUM DICHROMATE or POTASSIUM HEPTAOXOCHROMATE (VI) or K₂Cr₂O₇

#48

I am a type of line
I have both magnitude and direction
I have both positive and negative regions
One can say I am directed
If a number line is an example of me,

Then who am I? Directed Line

#49

I am a two-digit number.
I am divisible by the number of prime numbers below me.
In decimal, I am the first composite number not divisible by any of my digits.
I am the only positive integer that is three times the sum of my digits.
I have something to do with Cobalt,

So, who am I? 2 7

#50

I will recognise the very works of Sir Isaac Newton, as they can be derived directly from his Second Law of Motion.
I was developed by a Swiss Physicist and Mathematician.
Though my father deduced my principles, it was Leonhard Euler who, in 1752, derived my equation in its usual form.
I also connect well with the Law of conservation of energy, as one can likewise derive me from its concepts.
If a small volume of fluid is flowing horizontally from a region of high pressure to a region of low pressure, there is more pressure behind than in front; this gives a net force on the volume, accelerating it along the streamline.
In brief, if the speed of a fluid increases, then either its static pressure must decrease to compensate, or its potential energy must decrease; this is the exact postulate of my principle.

So, who am I? Bernoulli’s Principle or Bernoulli Effect

#51

Faraday’s Constant, the Standard Gibbs Free Energy of Formation and the Nernst Equation are all involved occasionally in my computations.
By my chemical analysis, Chemists can predict equilibrium reactions with ease.
Quite unfortunately, though, I am restricted to aqueous equilibrium.
Pivotal in measuring the relative strengths of various oxidants and reactants, my measurements are most useful within the field of electrochemistry.
I establish the reducing power of any element or compound.
More specifically, when a standard half-cell is connected to a standard hydrogen cell under standard conditions,
I am that potential difference produced.

So, who am I? Standard Electrode Potential.

#52

I am a three-dimensional solid.
I belong to the Polyhedron family.
Fish Aquarium typically represents my rectangular forms.
Based on the alignment of my identical bases, I can be oblique or right.
Based on the shape of my cross-sectional base, I can be square, octagonal, etc
I am a polyhedron with two polygonal faces lying in parallel planes, and with the other faces as parallelograms.

So, who am I? Prism

#53

Foods or drinking beverages that contain high levels of me cause symptoms like vomiting, sleepiness, stomach irritation and convulsions.
I am classified as a carcinogen.
Natural sources of me include volcanoes.
A major source of my exposure is tobacco smoke.
To form a delocalized pi system, each of my 6-carbon atoms has to donate one of its 2p electrons.
I am composed of six carbon atoms joined in a planar hexagonal ring with one hydrogen atom attached to each.

So, who am I? Benzene

#54

We are more or less a family.
We can be in the alpha, beta and gamma forms.
We play a major role in liver functioning, fighting infections and blood clotting.
So yes, we relate to the blood.
Immunologically, my active gamma forms are called antibodies.
Sometimes, I am used synonymously with “globular Proteins”; however, albumins are globular proteins, but I do not accept it as part of me.
We are a heterogeneous group of large serum proteins

So, who am I? Globulins

#55.

In woodwork and building construction, I am a long, sturdy piece of heavy squared timber or metal used to support the roof or floor of a building.
I may be a bar of a balance from which scales hang.
In aeronautics, I am a constant directional radio signal transmitted for the guidance of pilots.
In radiography, I may be a collection of nearly parallel rays or a stream of particles such as electrons.
I am a line of light coming from a source such as the sun or a headlight.