datavorous/entrance-exam-dataset huggingface dataset:
Name two poisonous gases which can be prepared from chlorine gas.

Options:
A Chlorine dioxide (ClO2) and Chloramine (NH2Cl)
B Phosgene (COCl2) and Chloropicrin (Cl3CNO2)
C Hydrochloric acid (HCl) and Chloramine (NH2Cl)
D Sodium hypochlorite (NaClO) and Chlorate (ClO3-)

The correct answer is:
Phosgene (COCl2) and Chloropicrin (Cl3CNO2)

Solution:
Correct Option is : (B)
Phosgene (COCl2) and Chloropicrin (Cl3CNO2)

Topic: Chemistry, p Block Elements (Group 13 & 14), NEET
Names of some compounds are given. Which one is not in IUPAC system?

Options:
A
B
C
D

The correct answer is:

Solution:

Topic: Chemistry, Hydrocarbons, NEET
Natality refers to

Options:
A Number of individuals leaving the habitat
B Birth rate
C Dearth rate
D Number of individuals entering a habitat

The correct answer is:
Birth rate

Solution:
Natality refers to birth rate. It is referred to the number of births in the population in a time period that are added to the initial density. Along with the mortality rate, the natality rate is used to calculate the dynamics of a population. They are the key factors in determining whether a population is increasing, decreasing or staying the same.

Topic: Biology, Organisms and Populations, NEET, NEET 2018
National Botanical Research Institute is located in

Options:
A West Bengal.
B Uttar Pradesh.
C Maharashtra.
D Delhi.

The correct answer is:
Uttar Pradesh.

Solution:
The National Botanical Research Institute(NBRI) is located in Lucknow, Uttar Pradesh. It is a research institute of the Council of Scientific and Industrial Research which was originally known as the National Botanical Garden. It is involved in research in areas of plant sciences including taxonomy, genetic engineering, biotechnology and bioinformatics.

Topic: Biology, The Living World, NEET
Native silver metal forms a water soluble complex with a dilute aqueous solution of NaCN in the presence of

Options:
A Nitrogen
B Oxygen
C Carbon dioxide
D Argon

The correct answer is:
Oxygen

Solution:
4Ag+8NaCN+O2+2H2O ⟶ 4NaAgCN2+4NaOH
Ag react with NaCN in the presence of air, and forms sodium argentocyanide.

Topic: Chemistry, General Principles and Processes of Isolation of Metals, NEET
Natural killer cells are

Options:
A a type of lymphocyte and are a part of acquired immunity
B a type of lymphocyte and are a part of innate immunity
C a type of monocyte and are a part of acquired immunity
D a type of monocyte and are a part of innate immunity

The correct answer is:
a type of lymphocyte and are a part of innate immunity

Solution:
Natural killer cells are large granular lymphocytes. They produce a chemical which produces pores in foreign cells and destroy them. They are a part of innate immunity and form cellular barriers. The other two types of lymphocytes are B and T lymphocytes, which are small and have no granules in their cytoplasm. They are a part of acquired immunity.

Topic: Biology, Human Health and Diseases, NEET
Natural parthenogenesis occurs in

Options:
A frogs to form females
B honeybees to produce drones
C cockroaches to form only males
D earthworms

The correct answer is:
honeybees to produce drones

Solution:
Parthenogenesis is the development of an individual from an unfertilized egg. In honey bees drones develop parthenogenetically.

Topic: Biology, Reproduction in Organisms, NEET
Natural parthenogenesis occurs in

Options:
A Frog to form female
B Honeybee to produce drones
C Cockroach
D Grapes

The correct answer is:
Honeybee to produce drones

Solution:
Fertilization (= Syngamy) is a vital event in sexual reproduction. In this process, male and female gamete fuses to form a diploid zygote. But in parthenogenesis, female gamete develops into a new organism without fertilization. Examples: Rotifers, honeybees, some lizards, and birds (Turkey).

Topic: Biology, Principles of Inheritance and Variation, NEET
Natural reservoir of phosphorus is

Options:
A sea water
B animal bones
C rock
D fossils

The correct answer is:
rock

Solution:
The natural reservoir of phosphosus is rock, which contains phosphorus in the form of phosphates. Sea water, animal bones and fossils are reservoir of carbon.

Topic: Biology, Ecosystem, NEET, NEET 2013 (All India)
Natural rubber has:

Options:
A All cis - configuration
B All trans - configuration
C Alternate cis - and trans - configuration
D Random cis - and trans - configuration

The correct answer is:
All cis - configuration

Solution:
The natural rubber has an isoprene monomer unit. All isoprene units are present as the cis-configuration.

When isoprene units are combined together in cis configuration then natural rubber is formed.

The structure for the same is given below:

Topic: Chemistry, Polymers, NEET, NEET 2016 (Phase 1)
Natural rubber is an example of which type of polymer?

Options:
A Addition polymer
B Elastomer
C Condensation polymer
D None of these

The correct answer is:
Elastomer

Solution:
Natural rubber is addition polymer of isoprene (2-methyl-1, 3-butadiene)

Topic: Chemistry, Polymers, NEET
Natural selection has the ability to make a population look different when it is coupled with

Options:
A Mutation
B Migration
C Reproductive success
D Genetic equilibrium

The correct answer is:
Reproductive success

Solution:
Natural selection operates only by differential reproductive success. Differential mortality can be selective, but only to the degree that it creates differences between individuals in the number of reproductive progeny they produce.

Topic: Biology, Evolution, NEET
Natural selection where more individuals acquire specific character value other than the mean character value, leads to:

Options:
A Directional change
B Disruptive change
C Random change
D Stabilising change

The correct answer is:
Directional change

Solution:
If the organisms/individuals at one extreme of the distribution contribute more offspring to the next generation than other individuals do, then the mean of the population will change. This changes the normal distribution into one tailed-distribution. This is the case of directional selection. If directional selectional operates for many generations, an evolutionary trend within the population results.

Topic: Biology, Evolution, NEET, NEET 2022 (Phase 1)
Nature of equipotential surface for a point charge is

Options:
A ellipsoid with charge at foci
B sphere with charge at the centre of the sphere
C sphere with charge on the surface of the sphere
D plane with charge on the surface

The correct answer is:
sphere with charge at the centre of the sphere

Solution:
Electric potential due to point charge is given by the formula
V=kqr
As, all the points on equipotental surface will be equidistance from the charge.
Hence, it is spherical symmetry.

Topic: Physics, Electrostatics, NEET
Nature’s biological library is burning even before we cataloged the titles of all the books stocked there. This statement is related to

Options:
A loss of biodiversity
B environmental pollution
C fire in the library
D none of these

The correct answer is:
loss of biodiversity

Solution:
A large fraction of the species faces the threat of becoming extinct even before we discover them. So, the statement "Nature’s biological library is burning even before we cataloged the titles of all the books stocked there", is related to the aspect of loss of biodiversity.

Topic: Biology, Biodiversity and its Conservation, NEET
Ne22 nucleus, after absorbing energy, decays into two α-particles and an unknown nucleus. The unknown nucleus is

Options:
A Nitrogen
B Carbon
C Boron
D Oxygen

The correct answer is:
Carbon

Solution:
Atomic number of neon is 10.
By the emission of two α - particles, atomic number will be reduced by 4.

Therefore, atomic number of the unknown element will be Z=10-4=6.

Similarly, mass number of the unknown element will be
A=22-(2×4)=14
Therefore, unknown nucleus is carbon (A=14, Z=6)

Topic: Physics, Nuclear Physics, NEET
Near and far points of human eye are

Options:
A 25 cm and infinite
B 25 cm and 100 cm
C 55 cm and 200 cm
D 0 cm and 25 cm

The correct answer is:
25 cm and infinite

Solution:
Our eye lens has a power to adjust its focal length to see the nearer and father objects, this process of adjusting focal length is called accommodation. However, if the object is brought too close or bring too far from the eye, the focal length cannot be adjusted to from the image on the retina. Thus, there is minimum or maximum distance for the clever vision of an object. For a normal eye, near point or least distant vision D = 25 cm and far point = ∞

Topic: Physics, Ray Optics, NEET
Near the tips of grass blades, there is water loss in the form of liquid droplet around special openings of veins. This occurs due to

Options:
A negative root pressure due to water accumulation in vein endings.
B positive root pressure due to water accumulation in vein endings.
C positive root pressure due to release of water in vein endings.
D negative root pressure due to release of water in vein endings.

The correct answer is:
positive root pressure due to water accumulation in vein endings.

Solution:
Loss of water in the form of liquid droplets from special openings called hydathodes present at the tip of leaves is known as guttation. It occurs due to positive root pressure when water accumulates in the vein endings.

Topic: Biology, Transport in Plants, NEET
Nearly _________ million MTPs are performed in a year all over the world which accounts to _______ of the total number of conceived pregnancies in a year.

Options:
A 20-30; one-third
B 10-15; one-fourth
C 45-50; one-fifth
D 50-60; one-sixth

The correct answer is:
45-50; one-fifth

Solution:
Intentional or voluntary termination of pregnancy before full term is called medical termination of pregnancy (MTP) or induced abortion. Nearly 45 to 50 million MTPs are performed in a year all over the world which accounts to 1/5th of the total number of conceived pregnancies in a year. Obviously, MTP has a significant role in decreasing the population though it is not meant for that purpose.

Topic: Biology, Reproductive Health, NEET
Necrosis in crops is due to the deficiency of

Options:
A Ca, K, Mg and Cu
B N, K, S and Mo
C N, S, Fe and Zn
D Mg, S, Mn and Ca

The correct answer is:
Ca, K, Mg and Cu

Solution:
Deficiency of different essential elements produces different symptoms like chlorosis, necrosis or death of the tissue. Necrosis or death of the tissue, particularly leaf tissue, is due to deficiency of Ca, Mg, Cu, K .

Topic: Biology, Mineral Nutrition, NEET
Neo-Darwinism is

Options:
A natural selection theory
B modern mutation theory
C modern synthetic theory
D population theory

The correct answer is:
modern synthetic theory

Solution:
Neo-Darwinsim has emerged out as the 'modern synthetic theory of evolution. It designated by Huxley (1942).
Dobzhansky's (1937) book 'Genetics and the origin of species' provided the initial basis of this theory and Muller (1949), Fisher (1958), Wright (1968), Mayr (1963, 1970) Stebbins (1966-76) etc. helped significantly in its formulation.

Topic: Biology, Evolution, NEET
Neon gas is generally used in the sign boards. If it emits strongly at 616 nm, calculate distance traveled by this radiation in 30 s

Options:
A 10.3 × 109m
B 6.8 × 109m
C 7.4 × 109m
D 9.0 × 109m

The correct answer is:
9.0 × 109m

Solution:
Correct Option is : (D)
9.0 × 109m

Topic: Chemistry, Structure of Atom, NEET
Neon gas is generally used in the sign boards. If it emits strongly at 616 nm, calculate energy of quantum

Options:
A 32.27 × 10–20J
B 41.52 × 10–20J
C 28.12 × 10–20J
D 56.33 × 10–20J

The correct answer is:
32.27 × 10–20J

Solution:
Correct Option is : (A)
32.27 × 10–20J

Topic: Chemistry, Structure of Atom, NEET
Neon gas is generally used in the sign boards. If it emits strongly at 616 nm, calculate number of quanta present if it produces 2 J of energy.

Options:
A 3.9 × 1018quanta
B 4.6 × 1018quanta
C 5.4 × 1018quanta
D 6.2 × 1018quanta

The correct answer is:
6.2 × 1018quanta

Solution:
Correct Option is : (D)
6.2 × 1018quanta

Topic: Chemistry, Structure of Atom, NEET
Neon gas is generally used in the sign boards. If it emits strongly at 616 nm, calculate the frequency of emission,

Options:
A 4.87 × 1014s–1
B 5.23 × 1014s–1
C 6.36 × 1014s–1
D 7.25 × 1014s–1

The correct answer is:
4.87 × 1014s–1

Solution:
Correct Option is : (A)
4.87 × 1014s–1

Topic: Chemistry, Structure of Atom, NEET
Neoprene rubber is classified as

Options:
A polyhalo-olefin
B polybutadiene
C polyethylacrylate
D polyamide

The correct answer is:
polyhalo-olefin

Solution:
Neoprene rubber is classified as polyhalo-olefin

Topic: Chemistry, Polymers, NEET
Nepenthes is a

Options:
A Primary producer
B Consumer
C Primary producer and consumer
D None of the above

The correct answer is:
Primary producer and consumer

Solution:
Nepenthese is a chlorophyll containing plant so it synthesizes food by the process of photosynthesis thus it is a primary producer and because of being an insectivorous plant it consumes insects like grasshopper and other small insects, so it is also a consumer.

Topic: Biology, Ecosystem, NEET
Net gain of ATP molecules, during aerobic respiration, is

Options:
A 40 molecules
B 48 molecules
C 36 molecules
D 38 molecules.

The correct answer is:
36 molecules

Solution:
In aerobic respiration complete oxidation of one glucose molecule produces 38 ATP molecules. But the
number of ATP molecules so produced may vary depending upon the mode of entry of NADH 2 in the
mitochondria. If the electrons of NADH 2 are accepted by malate then each molecule of NADH 2 yields 3 ATP molecules and the total would be 38 ATP molecules. But if the electrons of NADH 2 are accepted by FAD it yields only 2 ATP molecules making the total of 36 ATP molecules. This type of shuttle occurs in most of the eukaryotic cells.

Topic: Biology, Respiration in Plants, NEET
Neural canal is located in

Options:
A cranium
B skull
C vertebra
D spinal cord

The correct answer is:
vertebra

Solution:
The vertebral column is made up of 26 small bones known as vertebrae. These include seven cervical, twelve thoracic, five lumbar, one sacral, and one coccygeal. Every vertebra has a neural canal through which spinal cord passes. It supports and protects the spinal cord which is a nervous tissue in the same way as cranium protects the brain.

Topic: Biology, Neural Control and Coordination, NEET
Neurohypophysis secretes the

Options:
A Vasopressin and ACTH
B ADH and pitocin
C Pitressin and ACTH
D Oxytocin and LTH

The correct answer is:
ADH and pitocin

Solution:
Neurohypophysis consists of supporting cells called pituicytes. Hypothalamic neurons secreted two octapeptides namely antidiuretic hormone (ADH) and oxytocin (pitocin).

Topic: Biology, Chemical Coordination and Integration, NEET
Neurons found in the cerebral cortex are

Options:
A Myelinated and unipolar
B Myelinated and multipolar
C Non-myelinated and unipolar
D Non-myelinated and multipolar

The correct answer is:
Non-myelinated and multipolar

Solution:
Types of neurons on the basis of a number of axon and dendrites :

Types of neurons	Number of Dendrite (D)	Number of Axon (A)	D + A	Found in

1. Unipolar neuron	0	1	1	Embryonic stage

2. Bipolar neuron	1	1	2	Retina

3. Multipolar neuron	2 or more	1	Many	Cerebral cortex

Topic: Biology, Neural Control and Coordination, NEET
New cell arises from

Options:
A bacterial fermentation
B regeneration of old cell
C pre-existing cell
D non-living material

The correct answer is:
pre-existing cell

Solution:
Rudolf Virchow first stated that 'Omnis cellulae e cellulae' which means that all cell arises from the pre-existing cell by division.

Topic: Biology, Cell - The Unit of Life, NEET
New cells generate from ___

Options:
A bacterial fermentation
B regeneration of old cells
C pre-existing cells
D abiotic materials

The correct answer is:
pre-existing cells

Solution:
New cells generate from pre-existing cells.

Topic: Biology, Cell - The Unit of Life, NEET
Newton's law of cooling applies when a body is losing heat to its surroundings by

Options:
A conducting
B convection
C convection and radiation
D conduction as well as radiation

The correct answer is:
convection and radiation

Solution:
Newton's law of cooling applies when a body is losing heat to its surrounding by convection and radiation.

Topic: Physics, Thermal Properties of Matter, NEET
NHC structural proteins are

Options:
A basic proteins rich in tryptophan and arginine
B regulatory proteins
C catalytic proteins rich in tryptophan and arginine
D required for packaging of chromatin at higher levels

The correct answer is:
required for packaging of chromatin at higher levels

Solution:
The packaging of chromatin at higher level requires additional set of proteins that collectively are referred as Non - histone chromosomal (NHC) proteins. Non - histone chromosomal proteins are of three types :
(i) Scaffold or structural NHC
(ii) Functional NHC protein e.g., DNA polymerase, RNA polymerase
(iii) Regulatory NHC protein e.g., HMG (High mobility group proteins that controls gene expression)

Topic: Biology, Molecular Basis of Inheritance, NEET
Niche is

Options:
A the range of temperature that the organism needs to live
B the physical space where an organism lives
C all the biological factors in the organism's environment
D the functional role played by organism where it lives

The correct answer is:
the functional role played by organism where it lives

Solution:
The functional role played by an organism where it lives. An ecological niche describes how a species interacts with and lives in its habitat. Ecological niches have specific characteristics, such as availability of nutrients, temperature, terrain, sunlight and predators, which dictate how, and how well, a species survives and reproduces.

Topic: Biology, Organisms and Populations, NEET, NEET 2018
Niche overlap indicates:

Options:
A mutualism between two species
B active cooperation between two species
C two different parasites on the same host
D sharing of one or more resources between the two species

The correct answer is:
sharing of one or more resources between the two species

Solution:
Niche/ecological niche is a specific part of habitat occupied by individuals of a species which is circumscribed by its range of tolerance, range of movement, microclimate, type of food and its availability, shelter, type of predator and timing of activity. Habitat has several ecological niches and supports a numbe of species. An ecological niche is used by a single species. Two or more species cannot use the same niche despite having a mutualistic association. Organism or populations in the competition have a niche overlap of a limited resource fo which they compete. Both owl and cat feed on shrews and mice. They occupy the same niche because of being ecological equivalents though their habitats are different.
So, the correct answer is 'Sharing of one or more resources between the two species'.

Topic: Biology, Organisms and Populations, NEET, NEET 2006
Niche overlap indicates

Options:
A

Sharing of resources in the same species

B

Mutualism between two species

C

Active co-operation between two species

D

Competition between two species for similar resources

The correct answer is:

Competition between two species for similar resources

Solution:
Niche overlap indicates competition between two species for similar resources. This indicates their similar habitat requirement and competition if tropic niche/spatial niche is the same and food/space is limiting, e.g., two different parasites on the same host.

Topic: Biology, Organisms and Populations, NEET
Nickel atom can lose two electrons to form a Ni2+ion. The atomic number of nickel is 28. From which orbital will nickel lose two electrons?

Options:
A 4s
B 3p
C 4d
D 3s

The correct answer is:
4s

Solution:
Correct Option is : (A)
4s

Topic: Chemistry, Structure of Atom, NEET
Nickel shows ferromagnetic property at room temperature. If the temperature is increased beyond Curie temperature, then it will show:

Options:
A anti ferromagnetism
B no magnetic property
C diamagnetism
D paramagnetism.

The correct answer is:
paramagnetism.

Solution:
Nickel exhibits ferromagnetism due to a quantum physical effect called exchange coupling.
If the temperature of a ferromagnetic material is raised above a certain value, called curie temperature, the coupling ceases to be effective.
Most such material then becomes simply paramagnetic.
Hence option (D) is the correct answer.

Topic: Physics, Magnetic Properties of Matter, NEET, NEET 2007
Nickel shows the ferromagnetic property at room temperature. If the temperature is increased beyond Curie temperature, then it will show

Options:
A Anti ferromagnetism
B No magnetic property
C Diamagnetism
D Paramagnetism

The correct answer is:
Paramagnetism

Solution:
Beyond Curie temperature, ferromagnetic substances behaves like a paramagnetic substance.

Topic: Physics, Magnetic Properties of Matter, NEET
Nicotiana sylvestris flowers only during long days and N. tabacum flowers only during short days. If raised in the laboratory under different photoperiods, they can be induced to flower at the same time and can be cross-fertilized to produce self-fertile offspring. What is the best reason for considering N. sylvestris and N. tabacum to be separate species?

Options:
A They cannot interbreed in nature
B They are reproductively distinct
C They are physiological distinct
D They are morphologically distinct

The correct answer is:
They cannot interbreed in nature

Solution:
The term species evolves from word specific means only those groups of plants or animals come under one species which can interbreed and produce fertile offsprings naturally. N. tabacum and N. sylvestris cannot produce flowers naturally have different photoperiods, hence they cannot belong to the same species. Thus, they cannot interbreed in nature.

Topic: Biology, Plant - Growth and Development, NEET
Nicotiana sylvestris flowers only during long days and N.tabacum flowers only during short days. If raised in the laboratory under different photoperiods, they can be indued to flower at the same time and can be cross-fertilized to produce self-fertile offspring. What is the best reason considering $N$. sylvestris and N.tabocum to be separate species ?

Options:
A they cannot interbreed in nature
B they are reproductively distinct
C they are physiologically distinct
D they arc morphologically distinct

The correct answer is:
they cannot interbreed in nature

Solution:
According to biological species concept, a species is a natural inbreeding group which may have essentially similar morphological traits but they are genetically distinct and reproductively isolated from others. As under laboratory conditions, N. tabacum and $\mathrm{N}$. sylvestris cannot produce selffertile offspring, so they are not reproductively isolated. They are considered as separate species because since their flowering periods are different so cross pollination is not possible between them naturally. This makes them different species.
Caution
Students are generally intimidated by such long questions. However, in most cases. such type of questions are framed to test the presence of mind and witty nature. These questions are easy to answer and the actual question is asked in last 2 lines only, rest form the story around it. As in this case, 'What is the best reason for considering $N$. sylvestris and $N$. tabacum to be separate species' is the question in focus and the options given defines the universal term 'species.'

Topic: Biology, Principles of Inheritance and Variation, NEET, NEET 2003
Niobium crystallizes in a body-centered cubic structure. If the density is 8.55 g/cm³, calculate the atomic radius of niobium using its atomic mass of 93 u.

Options:
A 1.45 × 10⁻⁸ cm
B 14.32 mm
C 1.75 × 10⁻⁸ cm
D 1.98 × 10⁻⁸ cm

The correct answer is:
14.32 mm

Solution:
Correct Option is : (B)
14.32 mm

Topic: Chemistry, Solid State, NEET