GENERAL KNOWLEDGE OF SCIENCE
Test of General Knowledge of Science
Once I conducted an examination to check the general knowledge of the students related to science. Here science means basic Physics, Chemistry and Mathematics. The questions, which I set, are given along with their answers. There were in all fifty-five questions and very few students could give the correct answers of even ten questions. For the perusal of my readers the questions along with their answers are given below:
Q-1) What is afterglow?
Ans- A glow sometimes observed high in the western sky after the sunset. It is caused by the fine dust particles in the upper atmosphere, scattering the light from the sun.
Q-2) what is Anemometer?
Ans- It is an instrument to measure the speed of the wind or any other gas.
Q-3) What do you mean by Asymptote?
Ans- It is a line approaching a curve, but never reaching it within a finite distance.
Q-4) What is Biotin?
Ans- It is a vitamin; which belongs to the B-complex group, the formula is C10H16O3N2S. This is also known as vitamin – H.
Q-5) What is a black hole?
Ans- A black hole is a hypothetical region of space possessing a gravitational field so intense that no matter or radiation can escape from it. It is formed when any star collapses.
Q-6) What is Boolean Algebra?
Ans- It is a branch of symbolic logic used in computers.
Q-7) What is Calibration?
Ans- It is defined as the graduation of an instrument to enable measurement in definite units to be made with it. Thus the arbitrary scale of a galvanometer may be calibrated in amperes, thereby converting the instrument into an ammeter for measuring electric current.
Q-8) What is Caro’s Acid?
Ans- H2SO5
Q-9) What is Chiron?
Ans- It is a small planet between Saturn and Uranus.
Q-10) What is Chlorophyll?
Ans- chlorophyll adds the green colours to the leaves of a plant. There are two types of chlorophyll:
i) Chlorophyll –a: C55H72O5N4Mg; ii) Chlorophyll-b: C55H70O6N4Mg
Q-11) What is the formula of Cholesterol?
Ans- C27H45OH
Q-12) What are the examples of Cis and Trans isomerism?
Ans- Cis and Trans isomers differ by 1800. From the following example it will be clear:
H - C - COOH H - C - COOH
H - C - COOH HOOCH - C - H
Maleic Acid Fumaric Acid
(Cis form) (Trans form)
Q-13) What is Co-logarithm?
Ans- Co-logarithm is the logarithm of the reciprocal of a number, expressed with a positive mantissa.
Q-14) What is commutative algebra?
Ans- The algebra in which the order of the term is not important.
e.g. (a + b) = (b + a) is known as Commutative algebra.
Q-15) What do you mean by Critical mass?
Ans- This is the minimum amount of fissile material required in a nuclear reactor or nuclear weapon to sustain a chain reaction.
Q-16) What is crystal system?
Ans- Crystal system is divided into seven systems. They are as given below:
1) Cubic, 2) Tetragonal, 3) Orthorhombic, 4) Hexagonal, 5) Trigonal, 6) Monoclinic, 7) Triclinic.
Q-17) What is Cyanocobalamine?
Ans- It is a vitamin, which belongs to the group of B-complex. It is commonly known as vitamin B12. The formula is C63H90O14N14PCo.
Q-18) What is dendrology?
Ans- It is a branch of Botany concerned with trees and shrubs.
Q-19) What is Dynamic Equilibrium?
Ans- If two opposing processes are going on at the same speed, the system remains unchanged. This is known as dynamic equilibrium.
Q-20) What do you mean by the term expansion of the universe?
Ans- It is a widely accepted theory, which states that the universe is expanding i.e. clusters of galaxies are receding from each other.
Q-21) What is Fermi?
Ans- It is a unit of length. It is used in nuclear physics. It is equal to 10-13cm.
Q-22) What is Fluidity?
Ans- This is the term, which is the reciprocal of viscosity. The unit of dynamic fluidity of a fluid in C.G.S. system is ‘rhe’. It is the reciprocal of poise and one poise is equal to dyne-s / cm2.
Q-23) What is Fumeric acid?
Ans- It is an acid, which is isomeric with Maleic acid. The formula is HOOCCH: CHCOOH.
Q-24) What are fungi?
Ans- Fungi is a simple plant containing no chlorophyll.
Q-25) What is Gonimeter?
Ans- It is an instrument used for measurement of angles.
Q-26) What is harmonic series?
Ans- It is a series in which the reciprocals of the terms are in arithmetic progress, the example is 1, ?, 1/3, ?…
Q-27) What do you mean by hyperbolic function?
Ans- These are six mathematical functions analogous to the trigonometrical ratios. Examples are given below:
Sinh x = ?(ex – e-x)
Cosh x = ?(ex + e-x)
Q-28) What is injection moulding?
Ans- It is a process by which thermoplastic articles are moulded.
Q-29) What is an integrand?
Ans- A mathematical operation that is to be subjected to integration.
Q-30) What do you mean by intrinsic energy?
Ans- It is assumed in calculation in thermo chemistry that every substance possesses a definite quantity of intrinsic energy, i.e. energy in the substance and may be in part released in the form of heat if the substance takes part in a chemical reaction.
Q-31) What is an isobaric surface?
Ans- An isobaric surface is known as a surface of equal pressure.
Q-32) What is Isokon?
Ans- Isokon is a line which joins the points of equal viscosity.
Q-33) What do you mean by Kish?
Ans- It is a particular variety of graphite, which is occasionally formed in iron smelting furnaces.
Q-34) What is Lapis Lazuli?
Ans- It is nothing but Sodium Aluminum Silicate containing sulphur.
Q-35) What is magic number?
Ans- There are some particular nucleous of some particular elements where the nuclei containing these numbers of neutrons or protons have exceptional energy. The numbers are 2, 8, 20, 28, 50, 82 and 126.
Q-36) What is the molecular formula of methyl orange?
Ans- C14H14N3NaO3S
Q-37) What is the molecular formula of Nicotine?
Ans- C10H14N2
Q-38) What do you mean by perpetual machine?
Ans- It is a kind of machine which once set in motion, will go on forever without receiving energy.
Q-39) What is Phenolphthalein?
Ans- It is an indicator used in the chemical titration (titration is a classified type of reaction). The molecular formula is C20H14O4.
Q-40) What is pK?
Ans- It is a measure of strength of acid, defined as log (1/k), where ‘k’ is the equilibrium constant of the dissociation of the acid. The higher the value of pK, the weaker the acid.
Q-41) What do you mean by rectification related to Physics?
Ans- It is the conversion of an alternating current to direct current.
Q-42) What do you mean by rectification related to mathematics?
Ans- It is the process of determining the length of a curve.
Q-43) What do you mean by rectification related to Chemistry?
Ans- It is the purification of a liquid by distillation.
Q-44) What is Rheology?
Ans- Rheology is the study of the deformation and flow of matter. It deals with non-Newtonian fluids.
Q-45) What is Selenology?
Ans- Selenology is the scientific study of moon.
Q-46) What do you mean by Stalagmometry?
Ans-It is the measurement of surface tension by determining the mass (or volume) of a drop of the liquid having from the end of a tube.
Q-47) What is Tensimeter?
Ans- It is an instrument for measuring the vapour pressure.
Q-48) What is the formula of Vanadic acid?
Ans- HVO3
Q-49) What is wave equation?
1 ?2y
?2y =
c2 ?t2
Ans- It is given by
Where, ?2 is the Laplace Operator,
y is the wave function and ‘c’ is the velocity of light.
Q-50) What is the formula and structure of Hydrazoic acid?
Ans- The formula is N3H and the structure is given below:
N o N = N - H
Q-51) What do you mean by microwaves?
Ans- They are the waves whose wavelength ‘l’ varies between 1mm to 120mm.
Q-52) What is the third law of Thermodynamics?
Ans- The third law of thermodynamics states that the entropy of the substance ends to zero as its thermodynamic temperature reaches zero.
Q-53) What do you mean by Torr?
Ans- This is a unit of pressure equal to a pressure of 101325 / 760 pascals i.e. 133.322 pascals. It is equal to 1mm of Hg.
Q-54) What is chaining rule?
Ans- dy / dx = dy / dz * dz / dx, this is chain rule; it is also known as function of function.
Q-55) What do you mean by continuous function?
Ans- A function that has no sudden changes in value as the variable increases or decreases smoothly. More precisely a function f (x) is continuous at a point x = a, if the limit of f (x) as ‘x’ approaches ‘a’ is f (a). When a function does not satisfy the condition at a point, it is said to be discontinuous or to have a discontinuity at that point. e.g. tanq has discontinuities at ‘q’ values p/2, 3p/2, 5p/2………… (2n+1) p/2. A function is continuous in an interval of ‘x’ if there are no points of discontinuity in that interval.
My dear readers may think the questions are offbeat type. But for the kind attention of my readers, let me state that a good student sometimes must go for some offbeat reading. All the time if they go through the textbooks, there will be no difference between an ordinary student and a good student. Now-a-days we want to get things instantly like instant coffee. Unfortunately there is no system till date where you can get knowledge instantly without any effort. It is not an ATM, where one has to just zip the card and have the money (obviously it is not self-earned money. It is given by the parents). Just imagine a eutopian system where one can zip a card and have some knowledge from an AKM (it is assumed that knowledge is deposited by some well wisher). If that happens, students and people will try to obtain maximum knowledge with least labour according to their requirement.