General Science MCQ

What are fundamental units? A) Units defined for fundamental physical quantities (mass, length, time, etc.) B) Light reflects back when incident angle exceeds critical angle C) Substances with at least one dimension less than about 100 nanometers D) Heat supplied equals change in internal energy plus work done

A) Units defined for fundamental physical quantities (mass, length, time, etc.)

How many fundamental quantities are there? A) 7 B) Kelvin (K) C) Increases D) Fovea centralis

A) 7

SI unit of mass A) Watson and Crick B) Kilogram (Kg) C) Pteridophytes D) 746 W

B) Kilogram (Kg)

SI unit of length A) Thomas Hunt Morgan B) Bifocal lenses C) Metre (m) D) Increases

C) Metre (m)

SI unit of time A) N

m B) No rods or cones C) 80 cal/g D) Second (s)

SI unit of temperature A) Kelvin (K) B) Ornithology C) White D) 7

A) Kelvin (K)

SI unit of electric current A) Ornithology B) Oncology C) Ampere (A) D) Grana of chloroplast

C) Ampere (A)

SI unit of luminous intensity A) Alexander Graham Bell B) Stroma of chloroplast C) Candela (cd) D) O

C) Candela (cd)

SI unit of amount of substance A) Mole (mol) B) Karl Landsteiner C) 17.2 metres D) Reptiles and mammals

A) Mole (mol)

Two supplementary SI units A) Force directed towards the centre required for circular motion B) Speed of source to speed of sound in same medium C) Radian (plane angle) and Steradian (solid angle) D) Process of obtaining pure metal from its ore

C) Radian (plane angle) and Steradian (solid angle)

What are derived units? A) Pressure, kinetic, and potential energy per unit volume in flowing fluid B) Units defined for derived quantities like speed, acceleration, force C) Particles vibrate along the direction of wave propagation D) Bodies in thermal equilibrium with a third body are in equilibrium with each other

B) Units defined for derived quantities like speed, acceleration, force

CGS system stands for A) Displacement / Time interval B) Splitting of heavy nucleus into lighter nuclei C) Centimetre, gram, second (France) D) Its density is less than water

C) Centimetre, gram, second (France)

FPS system stands for A) Foot, pound, second (British) B) Carries oxygen in red blood cells C) Promotes fruit ripening D) Mixture of salt and pepper

A) Foot, pound, second (British)

MKS system stands for A) Metre, kilogram, second (French) B) 3.26 light years = 3.08 x 10^16 m C) Virtual, erect, laterally inverted, same size D) Remains at same height

A) Metre, kilogram, second (French)

1 light year equals A) Fovea centralis B) Diabetes insipidus C) 9.46 x 10^15 m D) 80 cal/g

C) 9.46 x 10^15 m

1 astronomical unit (AU) equals A) 1.5 x 10^11 m B) Schleiden and Schwann C) Adrenal medulla D) Alpha particle

A) 1.5 x 10^11 m

1 parsec equals A) 3.26 light years = 3.08 x 10^16 m B) 1.01325 x 10^5 Pa = 760 mm Hg C) Permanent stopping of ovulation and menstruation D) Foot, pound, second (British)

A) 3.26 light years = 3.08 x 10^16 m

1 angstrom equals A) 20 Hz to 20 kHz B) Second (s) C) 10^

10 m D) G. Marconi

1 quintal equals A) Fathometer B) 9.46 x 10^15 m C) 100 kg D) Lysosomes

C) 100 kg

1 metric ton equals A) Reptiles and mammals B) 10^3 kg C) Double stranded D) Decreases

B) 10^3 kg

1 atomic mass unit (amu) equals A) 1.66 x 10^

27 kg B) Salmonella typhi C) Gigantism/Acromegaly D) Central nervous system

What is displacement? A) Due to differential scattering of light wavelengths (Rayleigh scattering) B) Amount of substance liberated is proportional to charge passed C) Shortest distance from initial to final position of a particle D) Impossibility of converting heat completely into work

C) Shortest distance from initial to final position of a particle

Formula for velocity A) Double stranded B) Measuring sea depth, locating submarines C) Displacement / Time interval D) Ratio of speed of light in two media

C) Displacement / Time interval

Formula for acceleration A) Density is maximum at 4°C B) T(K) = t°C + 273.16 C) Every action has an equal and opposite reaction D) Change in velocity / Time interval

D) Change in velocity / Time interval

Newton's First Law is also called A) Fovea centralis B) Law of inertia C) 10^

10 m D) Aluminium

Newton's Second Law states A) Carry oxygenated blood away from heart (except pulmonary artery) B) Heat supplied equals change in internal energy plus work done C) Rate of change of momentum is proportional to applied force D) Change in apparent frequency due to relative motion of source and observer

C) Rate of change of momentum is proportional to applied force

Newton's Third Law states A) Every action has an equal and opposite reaction B) Rain water with pH less than 5.6 C) Excretion of nitrogenous waste as ammonia D) Permanent stopping of ovulation and menstruation

A) Every action has an equal and opposite reaction

Law of conservation of linear momentum A) 11.2 km/sec, about 4/2 times orbital velocity B) Development of fruit without fertilisation C) Successive reflection of sound from large obstacles D) Total momentum remains constant if no external force acts

D) Total momentum remains constant if no external force acts

What is centripetal force? A) Coating iron or steel with a thin zinc layer to prevent corrosion B) Particles vibrate along the direction of wave propagation C) Force directed towards the centre required for circular motion D) Amount of substance liberated is proportional to charge passed

C) Force directed towards the centre required for circular motion

What is centrifugal force? A) Angle of incidence equals angle of reflection B) Weakly magnetised opposite to magnetising field C) Good absorbers are good emitters D) Force equal and opposite to centripetal force

D) Force equal and opposite to centripetal force

Unstable equilibrium centre of gravity position A) Increases B) Number of protons plus neutrons C) Solids D) Highest position

D) Highest position

Neutral equilibrium centre of gravity A) Emulsifies fats B) Oncology C) Ammonium sulphate, urea D) Remains at same height

D) Remains at same height

SI unit of torque A) N

m B) Radar C) XX D) Entomology

SI unit of angular momentum A) Kilogram (Kg) B) 7 C) kg m^2/s D) 20 Hz to 20000 Hz

C) kg m^2/s

SI unit of moment of inertia A) Thomas Hunt Morgan B) Reptiles and Aves C) Solids D) kg/m^2

D) kg/m^2

1 Horse Power equals A) 28 days B) 7 C) Dwarfism D) 746 W

D) 746 W

Work

energy theorem states A) Work done equals change in kinetic energy B) Mixture of salt and pepper C) Increased pressure raises boiling point of water D) Opaque white membrane developing on the cornea

Value of universal gravitational constant G A) Mitochondria B) 1.66 x 10^

27 kg C) 6.67 x 10^

Who discovered gravitation? A) Grana of chloroplast B) Hygrometer C) Isaac Newton D) Density is maximum at 4°C

C) Isaac Newton

Escape velocity of Earth A) 11.2 km/sec, about 4/2 times orbital velocity B) Hydrogen ion concentration of a solution C) Blue light is scattered away, red light reaches eyes D) Buoyant force equals weight of fluid displaced

A) 11.2 km/sec, about 4/2 times orbital velocity

Height of geostationary satellite A) Increased pressure raises boiling point of water B) 35800 km, orbital velocity 3.1 km/s C) Double fertilisation D) Opaque white membrane developing on the cornea

B) 35800 km, orbital velocity 3.1 km/s

Time period of geostationary satellite A) Gigantism/Acromegaly B) 24 hours C) Isaac Newton D) Anaemia

B) 24 hours

What is elasticity? A) Neutral electromagnetic radiation, highest penetrating power B) Converts low AC voltage to high AC voltage or vice versa without changing frequency C) Units defined for fundamental physical quantities (mass, length, time, etc.) D) Property of a body to regain original shape after removing deforming force

D) Property of a body to regain original shape after removing deforming force

What is plasticity? A) Carry oxygenated blood away from heart (except pulmonary artery) B) Body has no tendency to regain original shape after deforming force removed C) Neutral electromagnetic radiation, highest penetrating power D) Radiant energy of black body proportional to 4th power of absolute temperature

B) Body has no tendency to regain original shape after deforming force removed

What is stress? A) Splitting of heavy nucleus into lighter nuclei B) Internal restoring force per unit area C) Excretion of nitrogenous waste as ammonia D) Properties are periodic function of atomic mass

B) Internal restoring force per unit area

What is strain? A) Conductor with zero electrical resistance at very low temperature B) Weakly magnetised opposite to magnetising field C) Particles vibrate along the direction of wave propagation D) Ratio of change in configuration to original configuration

D) Ratio of change in configuration to original configuration

Hooke's law states A) Coating iron or steel with a thin zinc layer to prevent corrosion B) Heat cannot flow from cold to hot body without external work C) Within elastic limit, stress is directly proportional to strain D) First menstrual period, onset of puberty in females

C) Within elastic limit, stress is directly proportional to strain

Young's modulus is the ratio of A) Normal stress to longitudinal strain B) Foot, pound, second (British) C) Calcium hypochlorite (CaOCl2) D) Centimetre, gram, second (France)

A) Normal stress to longitudinal strain

Who discovered atmospheric pressure measurement (barometer)? A) Ichthyology B) Mole (mol) C) 746 W D) Torricelli

D) Torricelli

1 atm equals A) Alexander Graham Bell B) Matter with uniform composition throughout C) 1.01325 x 10^5 Pa = 760 mm Hg D) Diabetes mellitus

C) 1.01325 x 10^5 Pa = 760 mm Hg

Archimedes' Principle states A) Buoyant force equals weight of fluid displaced B) Carry deoxygenated blood to heart (except pulmonary vein) C) Total momentum remains constant if no external force acts D) Angle of incidence equals angle of reflection

A) Buoyant force equals weight of fluid displaced

Bernoulli's Principle relates A) Carry oxygenated blood away from heart (except pulmonary artery) B) Amount of substance liberated is proportional to charge passed C) Light reflects back when incident angle exceeds critical angle D) Pressure, kinetic, and potential energy per unit volume in flowing fluid

D) Pressure, kinetic, and potential energy per unit volume in flowing fluid

SI unit of heat A) Alpha particle B) Lavoisier C) Dim light D) Joule

D) Joule

1 calorie equals A) T(K) = t°C + 273.16 B) 18 C) Dim light D) 4.2 joule

D) 4.2 joule

Absolute zero temperature A) Blood clotting B)

273.16°C C) Lead D) Liver

Formula relating Kelvin and Celsius A) Butane and propane B) T(K) = t°C + 273.16 C) Negatively charged electrons D) Seismology

B) T(K) = t°C + 273.16

Water's anomalous behaviour A) Hydrogen ion concentration of a solution B) Centimetre, gram, second (France) C) Ariboflavinosis D) Density is maximum at 4°C

D) Density is maximum at 4°C

Latent heat of fusion of ice A) 80 cal/g B) 10^

10 m C) Solids D) Beri

Latent heat of vaporisation of water A) Ribose B) Increases C) 7.35 to 7.45 D) 540 cal/g

D) 540 cal/g

Stefan's Law states A) Radiant energy of black body proportional to 4th power of absolute temperature B) Bodies in thermal equilibrium with a third body are in equilibrium with each other C) Coating iron or steel with a thin zinc layer to prevent corrosion D) Mixture of two or more elements, mainly metals, in solid solution

A) Radiant energy of black body proportional to 4th power of absolute temperature

Kirchhoff's Law states A) Vermiform appendix B) 1.01325 x 10^5 Pa = 760 mm Hg C) Sea water is denser, giving more upthrust D) Good absorbers are good emitters

D) Good absorbers are good emitters

Zeroth Law of Thermodynamics A) Bodies in thermal equilibrium with a third body are in equilibrium with each other B) Property of a body to regain original shape after removing deforming force C) Similar in structure/origin, different function (e.g. cat's paw, bat's wing) D) Body has no tendency to regain original shape after deforming force removed

A) Bodies in thermal equilibrium with a third body are in equilibrium with each other

First Law of Thermodynamics A) Unequal expansion of inner and outer glass layers B) Force directed towards the centre required for circular motion C) Blue light is scattered away, red light reaches eyes D) Heat supplied equals change in internal energy plus work done

D) Heat supplied equals change in internal energy plus work done

Kelvin

Planck statement is about A) Neutral electromagnetic radiation, highest penetrating power B) Development of fruit without fertilisation C) Total momentum remains constant if no external force acts D) Impossibility of converting heat completely into work

Clausius statement is about A) Properties of elements are periodic function of atomic number B) Light reflects back when incident angle exceeds critical angle C) Neutral electromagnetic radiation, highest penetrating power D) Heat cannot flow from cold to hot body without external work

D) Heat cannot flow from cold to hot body without external work

What is periodic motion? A) Properties are periodic function of atomic mass B) Permanent stopping of ovulation and menstruation C) Amount of substance liberated is proportional to charge passed D) Motion that repeats itself at equal intervals of time

D) Motion that repeats itself at equal intervals of time

At mean position in SHM A) Velocity is maximum, acceleration is zero B) 1.01325 x 10^5 Pa = 760 mm Hg C) Conversion of nitrate to gaseous nitrogen D) Combining light nuclei to form a heavier nucleus

A) Velocity is maximum, acceleration is zero

At extreme position in SHM A) Ratio of speed of light in two media B) Its density is less than water C) Velocity is zero, acceleration is maximum D) Atoms with same atomic number but different mass numbers

C) Velocity is zero, acceleration is maximum

Time period formula of simple pendulum A) T = 2π√(l/g) B) Dwarfism C) E. Goldstein D) Lead

A) T = 2π√(l/g)

What are transverse waves? A) First menstrual period, onset of puberty in females B) Particles vibrate perpendicular to wave propagation direction C) Ratio of change in configuration to original configuration D) Blue light is scattered away, red light reaches eyes

B) Particles vibrate perpendicular to wave propagation direction

What are longitudinal waves? A) Particles vibrate along the direction of wave propagation B) First menstrual period, onset of puberty in females C) 11.2 km/sec, about 4/2 times orbital velocity D) Carry oxygenated blood away from heart (except pulmonary artery)

A) Particles vibrate along the direction of wave propagation

Electromagnetic waves travel through A) Musical octaves B) Vacuum (do not need a medium) C) Female Anopheles mosquito D) Matter with uniform composition throughout

B) Vacuum (do not need a medium)

Speed of sound is highest in A) Aluminium B) Solids C) Trypanosoma D) Decreases

B) Solids

Audible sound range for humans A) Positively charged helium nuclei B) 9.46 x 10^15 m C) 20 Hz to 20000 Hz D) kg m^2/s

C) 20 Hz to 20000 Hz

Sound above 20000 Hz is called A) Ultrasonics B) 28 days C) Prolactin D) 10^

10 m

What causes an echo? A) Buoyant force equals weight of fluid displaced B) Successive reflection of sound from large obstacles C) V = IR at constant physical conditions D) Velocity is zero, acceleration is maximum

B) Successive reflection of sound from large obstacles

Minimum distance for echo formation A) 17.2 metres B) Pacemaker of the heart C) Increases D) Lavoisier

A) 17.2 metres

What is SONAR used for? A) Properties are periodic function of atomic mass B) Measuring sea depth, locating submarines C) Number of protons in nucleus D) Internal restoring force per unit area

B) Measuring sea depth, locating submarines

Doppler effect refers to A) Similar in function, different origin (e.g. wings of insects and birds) B) Bodies in thermal equilibrium with a third body are in equilibrium with each other C) Within elastic limit, stress is directly proportional to strain D) Change in apparent frequency due to relative motion of source and observer

D) Change in apparent frequency due to relative motion of source and observer

Mach number is the ratio of A) Speed of source to speed of sound in same medium B) Cardiology (angiology covers blood flow) C) Heat cannot flow from cold to hot body without external work D) Ratio of speed of light in two media

A) Speed of source to speed of sound in same medium

Speed of light in vacuum A) Diabetes mellitus B) Isaac Newton C) 3 x 10^8 m/s D) Ammeter

C) 3 x 10^8 m/s

Laws of reflection state A) Centimetre, gram, second (France) B) Positively charged helium nuclei C) Angle of incidence equals angle of reflection D) Work done equals change in kinetic energy

C) Angle of incidence equals angle of reflection

Image formed by plane mirror is A) Virtual, erect, laterally inverted, same size B) Successive reflection of sound from large obstacles C) Permanent stopping of ovulation and menstruation D) Force equal and opposite to centripetal force

A) Virtual, erect, laterally inverted, same size

Use of concave mirror in torches A) To get powerful parallel beams of light B) Carries oxygen in red blood cells C) Vacuum (do not need a medium) D) 11.2 km/sec, about 4/2 times orbital velocity

A) To get powerful parallel beams of light

Use of convex mirror A) As rear

view mirrors in vehicles B) The Sun and other stars C) Causes cell elongation, apical dominance D) Reptiles and Aves

Refractive index is defined as A) Amphibians of the plant kingdom B) Aedes aegypti mosquito C) Opaque white membrane developing on the cornea D) Ratio of speed of light in two media

D) Ratio of speed of light in two media

Snell's law states A) Strongly magnetised in direction of magnetising field B) Substances with at least one dimension less than about 100 nanometers C) Torque on current

carrying coil in a magnetic field D) Ratio of sine of incidence to sine of refraction is constant

What is total internal reflection? A) Heat cannot flow from cold to hot body without external work B) Light reflects back when incident angle exceeds critical angle C) Promotes cell division and growth of lateral buds D) Force directed towards the centre required for circular motion

B) Light reflects back when incident angle exceeds critical angle

Dispersion of light produces A) 6.67 x 10^

11 Nm^2/kg^2 B) Force equal and opposite to centripetal force C) Spectrum of seven colours (VIBGYOR) D) Measuring sea depth, locating submarines

Mixing red, green and blue light gives A) White B) Palaeontology C) Fovea centralis D) XY

A) White

Why is the sky blue? A) Shorter wavelengths (blue) are scattered more by atmosphere (Rayleigh scattering) B) Pressure, kinetic, and potential energy per unit volume in flowing fluid C) Units defined for derived quantities like speed, acceleration, force D) Radiant energy of black body proportional to 4th power of absolute temperature

A) Shorter wavelengths (blue) are scattered more by atmosphere (Rayleigh scattering)

Why does the sun look reddish at sunset? A) Heat supplied equals change in internal energy plus work done B) Work done equals change in kinetic energy C) Blue light is scattered away, red light reaches eyes D) Law of segregation (purity of gametes)

C) Blue light is scattered away, red light reaches eyes

Myopia is corrected using A) 10^

10 m B) Concave lens C) Ampere (A) D) Remains at same height

Hypermetropia is corrected using A) HIV virus B) Golgi apparatus C) Alpha particle D) Convex lens

D) Convex lens

Astigmatism is corrected using A) 7.35 to 7.45 B) Cylindrical lens C) 1 kWh = 3.6 x 10^6 joule D) About 80%

B) Cylindrical lens

Presbyopia is corrected using A) Copper and tin B) 120/80 mm Hg C) Metre (m) D) Bifocal lenses

D) Bifocal lenses

What causes cataract? A) Work done equals change in kinetic energy B) Opaque white membrane developing on the cornea C) V = IR at constant physical conditions D) Amphibians of the plant kingdom

B) Opaque white membrane developing on the cornea

Elementary charge magnitude A) Adrenal medulla B) Law of independent assortment C) 1.6 x 10^

19 C D) 100 kg

SI unit of electric charge A) Liver B) Ornithology C) Hygrometer D) Coulomb

D) Coulomb

Coulomb's law states A) Metre (m) B) Force between charges is proportional to product of charges and inversely proportional to square of distance C) E. Goldstein D) Kelvin (K)

B) Force between charges is proportional to product of charges and inversely proportional to square of distance