datavorous/entrance-exam-dataset huggingface dataset:
While measuring the thermal conductivity of a liquid, we keep the upper part hot and lower part cool, so that

Options:
A convection may be stopped
B radiation may be stopped
C heat conduction is easier downwards
D it is easier and more convenient to do so

The correct answer is:
convection may be stopped

Solution:
Natural convection in liquid occurs because of difference in density and is always in vertical direction. Therefore if we keep the upper part hot (lower density) and lower part cool (higher density) then heat transfer is because of conduction only.

Topic: Physics, Thermal Properties of Matter, NEET
While performing a resonance column experiment to measure the speed of sound, a student gets the first resonance condition at a column length of 18 cm during winter. Repeating the same experiment during summer, she measures the column length to be x cm for the second resonance. Then

Options:
A x<18
B x>54
C 18<x<36
D 18<x<54

The correct answer is:
x>54

Solution:
l1=18cmÂ·f=v14l1(for first resonance )
andf=3v24l2 (for second resonance )

where,l2=x

according to given situation and

â3v24l2=v14l1(or)l2=3l1Ãv2v1;v=Î³RTM
âx=54Ã( A quantity greater than 1)alsov1<v2 as during summer temperature would be higher. So X> 54

Topic: Physics, Waves and Sound, NEET
While separating a mixture of ortho and para nitrophenols by steam distillation, name the isomer which will be steam volatile.Give reason.

Options:
A Ortho-nitrophenol is steam volatile. The reason is chelation due to intramolecular H-bonding.
B Para-nitrophenol is steam volatile because it forms stronger hydrogen bonds with water.
C Ortho-nitrophenol is steam volatile because it has a lower molecular weight.
D Para-nitrophenol is steam volatile because it has a higher molecular weight.

The correct answer is:
Ortho-nitrophenol is steam volatile. The reason is chelation due to intramolecular H-bonding.

Solution:
Correct Option is : (A)
Ortho-nitrophenol is steam volatile. The reason is chelation due to intramolecular H-bonding.

Topic: Chemistry, Alcohols Phenols and Ethers, NEET
While slippling a on rough spherical surface of radius â²Râ², block A of mass â²mâ² comes with velocity 1.4gR at bottom B . Work done in slippling the block from â²Bâ² to â²Câ² is

Options:
A mgR4
B mgR
C 1.3 mgR
D 54mgR

The correct answer is:
1.3 mgR

Solution:
Loss in P.E.=
gain in K.E.+work done against friction mg R=12 m1.4 gR+Wf
Wf=0.3 mgR
Now,
WBâc=mg R+0.3 mgR
= 1.3 mgR

Topic: Physics, Work Power Energy, NEET
While studying an autosomal recessive disorder in a family, it was noted that husband and wife both did not suffer from the disease but their fathers had the disease. What is the probability that the couple will have a girl child without the disorder?

Options:
A 12
B 34
C 38
D 18

The correct answer is:
38

Solution:
Husband and wife are heterozygous as they don't suffer from autosome recessive disorder but their fathers were suffering from it. Their phenotype is Aa. The cross Aa x Aa produces children in the ratio AA:Aa:aa = 1:2:1. The probability of having a child without disorder Aa or AA will be 34. The probability of having a female child is 12. The probability of having a female child without disorder is 34x12=38.

Topic: Biology, Principles of Inheritance and Variation, NEET
While studying the concept of linkage, Morgan came to the conclusion that

Options:
A The genes were not located on the X chromosome.
B The genes did not segregate independently.
C The proportion of parental gene combinations is lesser than the non-parental type.
D The genes were not linked to one another.

The correct answer is:
The genes did not segregate independently.

Solution:
Morgan carried out several dihybrid crosses in Drosophila to study genes that were sex-linked. The crosses were similar to the dihybrid crosses carried out by Mendel in peas. For example, Morgan hybridised yellow-bodied, white-eyed females to brown-bodied, red-eyed males and intercrossed their F1 progeny. He observed that the two genes did not segregate independently of each other and the F2 ratio deviated extremely significantly from the 9:3:3:1 ratio (expected when the two genes are independent).

Topic: Biology, Principles of Inheritance and Variation, NEET
While waiting in a car at a signal, an 80 kg man and his car are suddenly accelerated to a speed of 5 m s-1 due to a rear-end collision by another vehicle. If the time of impact is 0.4 s, the average force on the man is

Options:
A 100 N
B 200 N
C 500 N
D 1000 N

The correct answer is:
1000 N

Solution:
Impulse = Change in momentum
F×t=m(v-u)
F×0.4=805-0⇒F=80×50.4=1000 N

Topic: Physics, Laws of Motion, NEET
Whipped cream is an example of

Options:
A Dispersed phase → Liquid Dispersion medium → gas
B Dispersed phase → Gas Dispersion medium → liquid
C Dispersed phase → Liquid Dispersion medium → liquid
D Dispersed phase → Solid Dispersion medium → liquid

The correct answer is:
Dispersed phase → Gas Dispersion medium → liquid

Solution:
Whipped cream is gas (dispersed phase) in liquid (Dispersion medium) system.

Topic: Chemistry, Surface Chemistry, NEET
White fumes appear around the bottle of anhydrous aluminium chloride. What is the reason for this phenomenon? Options:

Options:
A Anhydrous aluminium chloride undergoes sublimation.
B Anhydrous aluminium chloride reacts with oxygen in the air.
C Anhydrous aluminium chloride is highly hygroscopic and reacts with moisture in the air.
D Anhydrous aluminium chloride emits a visible light when exposed to air.

The correct answer is:
Anhydrous aluminium chloride is highly hygroscopic and reacts with moisture in the air.

Solution:
Correct Option is : (C)
Anhydrous aluminium chloride is highly hygroscopic and reacts with moisture in the air.

Topic: Chemistry, p Block Elements (Group 15, 16, 17 & 18), NEET
White light is incident on the interface of glass and air as shown in the figure. If green light is just totally internally reflected then the emerging ray in air contains.

Options:
A Yellow, orange, red
B Violet, indigo, blue
C All colours
D All colours except green

The correct answer is:
Yellow, orange, red

Solution:
Critical angle θc=sin-11μ
Wavelength increases in the sequence of VIBGYOR. According to Cauchy's formula refractive index (μ) decreases as the wavelength increases. Hence the refractive index will increase in the sequence of ROYGBIV.
The critical angle θC will thus increase in the same order VIBGYOR. For green light, the incidence angle is just equal to the critical angle. For yellow, orange and red the critical angle will be greater than the incidence angle. So these colours will emerge from the glass-air interface. Hence, the correct option is (Yellow, orange, red).

Topic: Physics, Ray Optics, NEET
White rust disease of mustard leaves is caused by a parasitic fungi called:

Options:
A Puccinia
B Albugo
C Mucor
D Rhizopus

The correct answer is:
Albugo

Solution:
White spots (white rust disease) appear on the surface of mustard leaves due to parasitic fungi called Albugo.

Topic: Biology, Biological Classification, NEET
Whittaker's system of classification implies that unicellular eukaryotes are primarily precursors of the

Options:
A plants
B fungi
C animals
D plants, fungi, and animals

The correct answer is:
plants, fungi, and animals

Solution:
The five-kingdom classification was proposed by RH Whittaker in 1969. This system was classified based on body organization, cell structure, mode of nutrition, and reproduction. This classification has helped to categorize the organisms together which were placed in different kingdoms in earlier classification. All the unicellular eukaryotic organisms have been placed under the kingdom Protista and prokaryotic organisms are grouped under Monera.

Topic: Biology, Biological Classification, NEET
Who, along with R.S. Mulliken developed the Molecular Orbital (MO) theory in 1932?

Options:
A Linus Pauling
B Gilbert N. Lewis
C F. Hund
D Niels Bohr

The correct answer is:
F. Hund

Solution:
F. Hund and R.S. Mulliken developed the Molecular Orbital (MO) theory in 1932

Topic: Chemistry, Chemical Bonding and Molecular Structure, NEET
Who among the following is not a naturalist?

Options:
A Darwin
B Malthus
C Wallace
D All of the above

The correct answer is:
Malthus

Solution:
Malthus proposed the principle of population that initiated Darwin to rethink many issues while coming up with his theory of natural selection. Malthus work made Darwin realize the importance of overpopulation and how it was necessary to have variability in different populations.

Topic: Biology, Evolution, NEET
Who amongst the following scientists had no contribution to the development of the double-helix model for the structure of DNA?

Options:
A Rosalind Franklin
B Maurice Wilkins
C Erwin Chargaff
D Meselson and Stahl

The correct answer is:
Meselson and Stahl

Solution:
Meselson and Stahl proved that DNA replicates semiconservatively.

Topic: Biology, Molecular Basis of Inheritance, NEET
Who announces the official names of all elements?

Options:
A The discoverer of each element.
B IUPAC representatives.
C The government of the country where the element was discovered.
D The president of the IUPAC.

The correct answer is:
IUPAC representatives.

Solution:
Official names of all elements are announced by IUPAC.

Topic: Chemistry, Classification of Elements and Periodicity in Properties, NEET
Who are Henderson and Hasselbalch, and what is their equation known for?

Options:
A They were famous chemists who discovered the structure of DNA.
B They were biologists who formulated the law of natural selection.
C They were pharmacists who developed a new drug.
D They formulated the Henderson-Hasselbalch equation known for calculating the pH of buffer solutions.

The correct answer is:
They formulated the Henderson-Hasselbalch equation known for calculating the pH of buffer solutions.

Solution:
Henderson and Hasselbalch are known for formulating the Henderson-Hasselbalch equation, which is used to calculate the pH of buffer solutions.

Topic: Chemistry, Ionic Equilibrium, NEET
Who are the major producers in a terrestrial ecosystem?

Options:
A Herbaceous and woody plants
B Carnivores
C Heterotrophs
D Photosynthetic bacteria

The correct answer is:
Herbaceous and woody plants

Solution:
In a terrestrial ecosystem, the major producers are herbaceous and woody plants.

Topic: Biology, Ecosystem, NEET
Who are the scientists credited with giving a more general definition of acids and bases, known as the Brönsted-Lowry theory?

Options:
A Johannes Brönsted and Robert Lowry
B Johannes Brönsted and Thomas M. Lowry
C Johannes Brönsted and Henry Lowry
D Johannes Brönsted and Michael Lowry

The correct answer is:
Johannes Brönsted and Thomas M. Lowry

Solution:
The Brönsted-Lowry theory was proposed by the Danish chemist Johannes Brönsted and the English chemist Thomas M. Lowry.

Topic: Chemistry, Ionic Equilibrium, NEET
Who are the 'universal recipients'?

Options:
A People with blood group A
B People with blood group B
C People with blood group AB
D People with blood group O

The correct answer is:
People with blood group AB

Solution:
Persons with 'AB' group can accept blood from persons with AB as well as the other groups of blood. Therefore, such persons are called 'universal recipients'.

Topic: Biology, Body Fluids and Circulation, NEET
Who argued that the code should consist of a combination of three nucleotides to code for 20 amino acids?

Options:
A Biochemist
B Geneticist
C Organic chemist
D Physicist

The correct answer is:
Physicist

Solution:
George Gamow, a physicist, suggested that the code should consist of a combination of three nucleotides to code for 20 amino acids.

Topic: Biology, Molecular Basis of Inheritance, NEET
Who assigned a value of 4.0 to fluorine on the Pauling scale of electronegativity?

Options:
A Linus Pauling
B Mulliken-Jaffe
C Allred-Rochow
D Ernst Mayr

The correct answer is:
Linus Pauling

Solution:
Linus Pauling, an American scientist, assigned a value of 4.0 to fluorine on the Pauling scale of electronegativity.

Topic: Chemistry, Classification of Elements and Periodicity in Properties, NEET
Who benefits from the use of saccharin?

Options:
A People with a sweet tooth
B Diabetic persons and those who need to control calorie intake
C Athletes and bodybuilders
D Children and teenagers

The correct answer is:
Diabetic persons and those who need to control calorie intake

Solution:
The use of saccharin is of great value to diabetic persons and people who need to control intake of calories.

Topic: Chemistry, Chemistry in Everyday Life, NEET
Who carries out plant breeding programmes worldwide?

Options:
A Government institutions
B Commercial companies
C Both government institutions and commercial companies
D None of the above

The correct answer is:
Both government institutions and commercial companies

Solution:
Plant breeding programmes are carried out worldwide by both government institutions and commercial companies.

Topic: Biology, Strategies for Enhancement in Food Production, NEET
Who challenged the ideas of the theory of special creation during the nineteenth century?

Options:
A Charles Darwin
B H.M.S. Beagle
C Both Charles Darwin and H.M.S Beagle
D None of the above

The correct answer is:
None of the above

Solution:
The ideas of the theory of special creation were challenged during the 19th century but not mentioned who challenged it.

Topic: Biology, Evolution, NEET
Who coined the term 'Kinetin'?

Options:
A Skoog and Miller
B Darwin
C Went
D Kurosawa

The correct answer is:
Skoog and Miller

Solution:
Skoog observed that from the internodal segments of the tobacco stem the callus proliferated only if, in addition to auxins the nutrients medium was supplemented with one of the following: extracts of vascular tissues, yeast extract, coconut milk or DNA. Miller et al. identified and crystallised the cytokinesis promoting active substance that they termed kinetin.

Topic: Biology, Plant - Growth and Development, NEET, NEET 2020 (Phase 2)
Who conceived the idea of searching for chemicals that would adversely affect invading bacteria but not the host?

Options:
A Paul Ehrlich
B Louis Pasteur
C Robert Koch
D Alexander Fleming

The correct answer is:
Paul Ehrlich

Solution:
Paul Ehrlich, a German bacteriologist, conceived the idea of searching for such chemicals.

Topic: Chemistry, Chemistry in Everyday Life, NEET
Who concluded from his studies that the presence of a cell wall is a unique feature of plant cells?

Options:
A M. Schleiden
B T. Schwann
C A. V. Leeuwenhoek
D Robert Hook

The correct answer is:
T. Schwann

Solution:
Theodore Schwann (1839), a British Zoologist, studied different types of animal cells and reported that cells had a thin outer layer which is today known as the ‘plasma membrane’. He also concluded, based on his studies on plant tissues, that the presence of cell wall is a unique character of the plant cells. On the basis of this, Schwann proposed the hypothesis that the bodies of animals and plants are composed of cells and products of cells.

Topic: Biology, Cell - The Unit of Life, NEET
Who conducted hybridisation experiments on garden peas for seven years and proposed the laws of inheritance in living organisms?

Options:
A Charles Darwin
B James Watson
C Gregor Mendel
D Francis Crick

The correct answer is:
Gregor Mendel

Solution:
Mendel conducted hybridization experiments on garden peas for seven years and proposed the laws of inheritance in living organisms.

Topic: Biology, Principles of Inheritance and Variation, NEET
Who conducted the experiments in the 1840s and 1850s that demonstrated the relationship between work and temperature change?

Options:
A A. Werner
B J. P. Joule
C Antoine Lavoisier
D James Clerk Maxwell

The correct answer is:
J. P. Joule

Solution:
J. P. Joule conducted experiments in the 1840s and 1850s that showed the relationship between work and temperature change.

Topic: Chemistry, Thermodynamics (C), NEET
Who conducted the series of experiments with Streptococcus pneumoniae that led to the discovery of the transforming principle?

Options:
A Walter Sutton
B Thomas Hunt Morgan
C Frederick Griffith
D Gregor Mendel

The correct answer is:
Frederick Griffith

Solution:
In 1928, Frederick Griffith conducted a series of experiments with Streptococcus pneumoniae that led to the discovery of the transforming principle.

Topic: Biology, Molecular Basis of Inheritance, NEET
Who conducts the action potential to the ventricular side?

Options:
A AVN
B SAN
C AV bundle
D Bundle of His

The correct answer is:
AV bundle

Solution:
The action potential is conducted to the ventricular side by the AVN and AV bundle.

Topic: Biology, Body Fluids and Circulation, NEET
Who created similar conditions to the early Earth on a laboratory scale in 1953?

Options:
A Charles Darwin
B Louis Pasteur
C S.L. Miller
D Oparin of Russia and Haldane of England

The correct answer is:
S.L. Miller

Solution:
In 1953, S.L. Miller, an American scientist created similar conditions in a laboratory scale.

Topic: Biology, Evolution, NEET
Who demonstrated that photosynthesis is essentially a light-dependent reaction?

Options:
A Cornelius van Niel
B Julius van Sach
C Ingenhousz
D T.W. Engelmann

The correct answer is:
Cornelius van Niel

Solution:
Cornelius van Niel, who based on his studies of purple and green bacteria, demonstrated that photosynthesis is essentially a light-dependent reaction in which hydrogen from a suitable oxidizable compound reduces carbon dioxide to carbohydrate.

Topic: Biology, Photosynthesis in Higher Plants, NEET
Who demonstrated that the actual distribution of molecular speeds depends on temperature and molecular mass?

Options:
A Avogadro
B Dalton
C Maxwell and Boltzmann
D Gay-Lussac

The correct answer is:
Maxwell and Boltzmann

Solution:
Maxwell and Boltzmann showed that the distribution of molecular speeds depends on temperature and molecular mass.

Topic: Chemistry, States of Matter, NEET
Who developed and redefined the theory proposed by Sidgwick and Powell?

Options:
A Lewis
B Nyholm and Gillespie
C Bohr
D Rutherford

The correct answer is:
Nyholm and Gillespie

Solution:
Nyholm and Gillespie developed and redefined the theory proposed by Sidgwick and Powell.

Topic: Chemistry, Chemical Bonding and Molecular Structure, NEET
Who developed Polyblend, a fine powder of recycled modified plastic?

Options:
A R.V.College of Engineering
B Bangalore City Corporation
C Ahmed Khan
D None of the above

The correct answer is:
Ahmed Khan

Solution:
Ahmed Khan, who has been producing plastic sacks for 20 years, developed Polyblend.

Topic: Biology, Environmental Issues, NEET
Who developed semi-dwarf wheat?

Options:
A Norman E. Borlaug
B Sonalika
C Kalyan Sona
D Jaya

The correct answer is:
Norman E. Borlaug

Solution:
Nobel laureate Norman E. Borlaug developed semi-dwarf wheat at International Centre for Wheat and Maize Improvement in Mexico.

Topic: Biology, Strategies for Enhancement in Food Production, NEET
Who developed the chemical method to synthesize RNA molecules with defined combinations of bases?

Options:
A George Gamow
B Har Gobind Khorana
C Marshall Nirenberg
D Severo Ochoa

The correct answer is:
Har Gobind Khorana

Solution:
Har Gobind Khorana developed the chemical method to synthesize RNA molecules with defined combinations of bases.

Topic: Biology, Molecular Basis of Inheritance, NEET
Who developed the collision theory?

Options:
A Arrhenius
B Max Trautz and William Lewis
C Ludwig Boltzmann and James Clark Maxwell
D J.H. van’t Hoff and Svante Arrhenius

The correct answer is:
Max Trautz and William Lewis

Solution:
The collision theory was developed by Max Trautz and William Lewis.

Topic: Chemistry, Chemical Kinetics, NEET
Who developed the Modern Periodic Law?

Options:
A Dmitri Mendeleev
B Henry Moseley
C Ernst Mayr
D Neils Bohr

The correct answer is:
Henry Moseley

Solution:
In 1913, the English physicist, Henry Moseley, observed regularities in the characteristic X-ray spectra of the elements and modified Mendeleev's Periodic Law, leading to the development of the Modern Periodic Law.

Topic: Chemistry, Classification of Elements and Periodicity in Properties, NEET
Who developed the Molecular Orbital (MO) theory in 1932?

Options:
A Linus Pauling
B Robert S. Mulliken
C Gilbert N. Lewis
D Niels Bohr

The correct answer is:
Robert S. Mulliken

Solution:
The Molecular Orbital (MO) theory was developed by F. Hund and R.S. Mulliken in 1932.

Topic: Chemistry, Chemical Bonding and Molecular Structure, NEET
Who developed the Valence bond theory further?

Options:
A Heitler and London
B Pauling and others
C Bohr and Einstein
D Schrödinger and Dirac

The correct answer is:
Pauling and others

Solution:
The Valence bond theory was developed further by Pauling and others.

Topic: Chemistry, Chemical Bonding and Molecular Structure, NEET
Who did Herbert Boyer have a conversation with in Hawaii?

Options:
A Stanley Cohen
B John Smith
C Jane Doe
D Robert Brown

The correct answer is:
Stanley Cohen

Solution:
Herbert Boyer had a conversation in Hawaii with a Stanford scientist named Stanley Cohen.

Topic: Biology, Biotechnology - Principles and Processes, NEET
Who disapproved the theory of embryological evidence as to the evidence of evolution?

Options:
A Hugo de Vries
B Darwin
C Ernst Heckel
D Karl Ernst von Baer

The correct answer is:
Karl Ernst von Baer

Solution:
Embryological support for evolution was also proposed by Ernst Heckel based upon the observation of certain features during embryonic stage common to all vertebrates that are absent in adults. For example, the embryos of all vertebrates including humans develop a row of vestigial gill slit just behind the head but it is a functional organ only in fish and not found in any other adult vertebrates. However, this proposal was disapproved on a careful study performed by Karl Ernst von Baer. He noted that embryos never pass through the adult stages of other animals.

Topic: Biology, Evolution, NEET
Who discovered a new infectious agent smaller than viruses and causes potato spindle tuber disease?

Options:
A T.O. Diener
B M.W. Beijerinck
C W.M. Stanley
D Dmitri Ivanowsky

The correct answer is:
T.O. Diener

Solution:
In 1971, T.O. Diener discovered a new infectious agent that was smaller than viruses and caused potato spindle tuber disease.

Topic: Biology, Biological Classification, NEET
Who discovered penicillin?

Options:
A Alexander Fleming
B Ernest Chain
C Howard Florey
D All of the above

The correct answer is:
All of the above

Solution:
Alexander Fleming discovered penicillin while working on Staphylococci bacteria, but its full potential as an effective antibiotic was established much later by Ernest Chain and Howard Florey.

Topic: Biology, Microbes in Human Welfare, NEET
Who discovered the effectiveness of DDT as an insecticide?

Options:
A Paul Muller
B Ernst Mayr
C Geigy Pharmaceuticals
D None of the above

The correct answer is:
Paul Muller

Solution:
Paul Muller of Geigy Pharmaceuticals in Switzerland discovered the effectiveness of DDT as an insecticide.

Topic: Chemistry, Haloalkanes and Haloarenes, NEET
Who discovered the first CO₂ fixation product during photosynthesis?

Options:
A Melvin Calvin
B Proust
C Priestley
D None of the above

The correct answer is:
Melvin Calvin

Solution:
The work of Melvin Calvin, who used radioactive 14C in algal photosynthesis studies, led to the discovery that the first CO₂ fixation product was a 3-carbon organic acid.

Topic: Biology, Photosynthesis in Higher Plants, NEET
Who discovered the nucleus in a cell?

Options:
A Anton Von Leeuwenhoek
B Robert Brown
C Louis Pasteur
D Galileo Galilei

The correct answer is:
Robert Brown

Solution:
Robert Brown discovered the nucleus in a cell. Anton Von Leeuwenhoek was the first person to see and describe a live cell, but it was Robert Brown who discovered the nucleus within the cell structure.

Topic: Biology, Cell - The Unit of Life, NEET