datavorous/entrance-exam-dataset huggingface dataset:
Which one of these statements explains why aluminium trifluoride is insoluble in anhydrous HF but dissolves on addition of NaF and precipitates out when gaseous BF₃ is bubbled through?

Options:
A Aluminium trifluoride reacts with NaF to form a soluble complex ion, allowing it to dissolve. The addition of gaseous BF₃ results in the reformation of solid AlF₃ due to a displacement reaction.
B The addition of NaF to aluminium trifluoride results in the formation of a complex ion that enhances its solubility. Bubbling gaseous BF₃ through the solution disrupts the complex, causing AlF₃ to precipitate.
C Aluminium trifluoride is insoluble in HF due to its strong ionic lattice. The addition of NaF provides F⁻ ions, allowing AlF₃ to form soluble complex ions. When gaseous BF₃ is introduced, it reacts with F⁻ ions, causing AlF₃ to precipitate.
D The addition of NaF to aluminium trifluoride forms a soluble complex ion. Bubbling gaseous BF₃ through the solution causes a chemical reaction that regenerates solid AlF₃, which then precipitates.

The correct answer is:
The addition of NaF to aluminium trifluoride results in the formation of a complex ion that enhances its solubility. Bubbling gaseous BF₃ through the solution disrupts the complex, causing AlF₃ to precipitate.

Solution:
Correct Option is : (B)
The addition of NaF to aluminium trifluoride results in the formation of a complex ion that enhances its solubility. Bubbling gaseous BF₃ through the solution disrupts the complex, causing AlF₃ to precipitate.

Topic: Chemistry, p Block Elements (Group 15, 16, 17 & 18), NEET
Which one of these statements provides a reason as to why CO is poisonous?

Options:
A CO interferes with the body's ability to transport oxygen in the bloodstream, leading to oxygen deprivation.
B CO reacts with vital enzymes in the body, causing them to become inactive.
C CO forms stable complexes with hemoglobin, preventing it from binding with oxygen.
D CO disrupts the pH balance in the blood, leading to respiratory failure.

The correct answer is:
CO interferes with the body's ability to transport oxygen in the bloodstream, leading to oxygen deprivation.

Solution:
Correct Option is : (A)
CO interferes with the body's ability to transport oxygen in the bloodstream, leading to oxygen deprivation.

Topic: Chemistry, p Block Elements (Group 15, 16, 17 & 18), NEET
Which one out of A-D given below correctly represents the structural formula of the basic amino acid?

Options:
A C
B $\mathrm{D}$
C $\mathrm{A}$
D $B$

The correct answer is:
$\mathrm{D}$

Solution:
Structure D represents basic amino acid lysine whereas structure A represents glutamic amino acid (acid group) and structure B represents alcoholic amino acid serine.

Topic: Biology, Biomolecules (B), NEET, NEET 2012 (Screening)
Which one pair of examples will correctly represent the grouping spermatophyta according to one of the schemes of classifying plants?

Options:
A Acacia, sugarcane
B Pinus, Cycas
C Rhizopus, Triticum
D Ginkgo, Pisum

The correct answer is:
Ginkgo, Pisum

Solution:
Spermatophyte, also called seed plant or phanerogam are seed-bearing tracheophytes (vascular plants). They are characterised by reproduction by seed and subdivided into the Gymnosperms and Angiosperms.
Angiosperms: Acacia, sugarcane, Pisum, Triticum
Gymnosperms: Pinus, Cycas, Gingko
Fungi: Rhizopus
Related Theory
Gymnosperm and Angiosperm have a sporic life-cycle with sporophyte predominance, and seeds. The gametophyte is reduced to cells inside the ovule or pollen grain. Males have a minimum number of cells being three and females being four. The antheridia are absent and the archegonia are also reduced. Higher groups of seed plants lost flagellate spermatozoa and developed pollen tubes. The classes of Spermatophyta are Ginkgoopsida, Cycadopsida, Pinopsida, Gnetopsida, and Angiospermae.
Caution
Students confuse the option as option (A) and (B) also represents spermatophytes. But the question asked toclassify the Spermatophyta, which is divided into Gymnosperm and Angiosperm and option (D) represents both the divisions respectively.

Topic: Biology, Plant Kingdom, NEET, NEET 2003
Which one single organism or the pair of organisms is correctly assigned to its or their named taxonomic group?

Options:
A Paramecium and Plasmodium belong to the same kingdom as that of Penicillium
B Lichen is a composite organism formed from the symbiotic association of an algae and a protozoan
C Yeast used in making bread and beer is a fungus
D Nostoc and Anabaena are examples of Protista

The correct answer is:
Yeast used in making bread and beer is a fungus

Solution:
Yeast or Saccharomyces cerevisiae is a fungus of class-Ascomycetes. Saccharomyces sp. are widely used in baking and brewing industries. Paramecium and Plasmodium belong to kingdom-Protista, Penicillium belongs to kingdom-fungi. Lichen is a composite organism formed from the symbiotic association of algae and fungi.
Nostoc and Anabaena are examples of cyanobacteria or blue-green algae.

Topic: Biology, Biological Classification, NEET, NEET 2012 (Screening)
Which one statement regarding plasma membrane is correct?

Options:
A Its outer and inner layer is electron-dense while the middle layer is electron transparent.
B Its outer and middle layer is electron transparent while the inner layer is electron-dense.
C Its outer and inner layer is electron transparent while the middle one is electron-dense.
D All layers are electron-dense.

The correct answer is:
Its outer and inner layer is electron-dense while the middle layer is electron transparent.

Solution:
Outer and inner layers are proteinaceous and middle layer is composed of phospholipids.

Topic: Biology, Cell - The Unit of Life, NEET
Which one the following has maximum reactivity towards HCN?

Options:
A HCHO
B CH3COCH3
C CH3CHO
D C2H5COCH3

The correct answer is:
HCHO

Solution:
Reactivity ∝ positive charge density on carbon atom of carbonyl group.

Positive charge on carbonyl carbon is maximum in case of HCHO. It is because no alkyl group (+I effect) is attached with it and therefore, positive charge is not dispersed so it is most reactive here towards HCN.

Topic: Chemistry, Aldehydes and Ketones, NEET
Which one the following species has plane triangular shape?

Options:
A N3
B NO3-
C NO2
D CO2

The correct answer is:
NO3-

Solution:
Calculate the electron pair.

E.P=Valence electron of central atom + monovalent atom + negative charge- positive charge2

For NO3-

E.P=5+12= 3

It means there is the requirement of the three orbitals for the hybridisation.

Therefore the hybridisation will be sp2
sp2 (triangular planer)

Topic: Chemistry, Chemical Bonding and Molecular Structure, NEET, NEET 2014
Which one will be the molecular formula for the sugar involved in making RNA?

Options:
A C5H10O5
B C5H12O5
C C5H10O6
D C12H22O11

The correct answer is:
C5H10O5

Solution:
Ribose is a type of pentose sugar involved in the making of nucleotide which is a monomer for RNA (nucleic acid). Molecular formula of Ribose is C5H10O5 .

Topic: Chemistry, Biomolecules, NEET
Which option correctly describes the equations for curves A and B, in the given graph of species-area relationship?

Options:
A

A	B

S=CAZ	Log S=Log C+Zlogâ¡A

B

A	B
LogÂ S=LogÂ C+Zlogâ¡A	S=CAz

C

A	B
LogÂ C=LogÂ S+Zlogâ¡A	S=CAz

D

A	B
S=CAZ	LogÂ C=LogÂ S+Zlogâ¡A

The correct answer is:

A	B

S=CAZ	Log S=Log C+Zlogâ¡A

Solution:
Biodiversity includes all the flora and fauna on Earth. All the varieties of organisms come under biodiversity. German naturalist Alexander von Humboldt made the observation regarding the relationship between species richness and the area of the habitat. As per his observation, species richness increased with increasing area of habitat up to a limit. When plotted in a graph with the area on the x-axis and species richness on the y-axis, this relationship forms a rectangular hyperbola with the equation S=CAZ. On a log scale, the relationship is a straight line having the equation
LogS=LogC+ZLogA . S= species richness, A=area of region, C=Y-intercept and Z= regression co-efficient (Slope).

Topic: Biology, Biodiversity and its Conservation, NEET
Which option is incorrectly matched?

Options:
A EcoRI - Production of sticky ends
B DNA ligase - Multiplication of DNA molecules
C ori - copy number
D Selectable marker - Identification of transformants

The correct answer is:
DNA ligase - Multiplication of DNA molecules

Solution:
DNA ligases are also called genetic gum. They join two individual fragments of double-stranded DNA by forming phosphodiester bonds between them thus help in sealing of DNA fragments. Therefore, it acts as a molecular glue. The enzyme used most often is the T4 DNA ligase.

Topic: Biology, Biotechnology - Principles and Processes, NEET
Which orbital does the electron in a hydrogen atom occupy?

Options:
A 1s
B 2s
C 2p
D 3s

The correct answer is:
1s

Solution:
, "The electronic configuration of the hydrogen atom is 1s1 meaning that it has one electron in the 1s orbital."

Topic: Chemistry, Structure of Atom, NEET
Which orbital is completely filled in the valence shell electronic configuration of Group 15 elements?

Options:
A s orbital
B p orbital
C d orbital
D f orbital

The correct answer is:
s orbital

Solution:
The paragraph mentions that the s orbital in Group 15 elements is completely filled.

Topic: Chemistry, p Block Elements (Group 15, 16, 17 & 18), NEET
Which orbitals are filled after the 4p orbital in the next eighteen elements from rubidium (Rb) to xenon (Xe)?

Options:
A 5s, 4d, and 5p
B 2s, 3d, and 4p
C 3s, 4d, and 5p
D 4s, 3d, and 4p

The correct answer is:
5s, 4d, and 5p

Solution:
, "the pattern of filling the 5s, 4d, and 5p orbitals are similar to that of 4s, 3d, and 4p orbitals as discussed above."

Topic: Chemistry, Structure of Atom, NEET
Which orbitals are filled in the elements from lanthanum (La) to mercury (Hg)?

Options:
A 6s
B 4f and 5d
C 5f and 6d
D 6p

The correct answer is:
4f and 5d

Solution:
from lanthanum (La) to mercury (Hg), the filling up of electrons takes place in 4f and 5d orbitals."

Topic: Chemistry, Structure of Atom, NEET
Which orbitals are suitable for sp hybridisation if the hybrid orbitals are to lie along the z-axis?

Options:
A s and px
B s and py
C s and pz
D s and d

The correct answer is:
s and pz

Solution:
The suitable orbitals for sp hybridisation are s and pz if the hybrid orbitals are to lie along the z-axis.

Topic: Chemistry, Chemical Bonding and Molecular Structure, NEET
Which orbitals in a hydrogen atom have the same energy and are called degenerate?

Options:
A 1s and 2s orbitals
B 2s and 2p orbitals
C 3s and 3p orbitals
D 4s and 4p orbitals

The correct answer is:
2s and 2p orbitals

Solution:
In a hydrogen atom, the 2s and 2p orbitals have the same energy and are called degenerate.

Topic: Chemistry, Structure of Atom, NEET
Which order for basic character of amine is correct for following compounds?

Options:
A 3>1>2>5>4
B 3>2>1>5>4
C 3>1>2>4>5
D 3>2>1>4>5

The correct answer is:
3>2>1>4>5

Solution:
Electron releasing group increases basic character of amine and aromatic amine is less basic than aliphatic amine
Basic order â +I or +M effect â1-I or -1M effect
Aliphatic amine is more basic than aromatic amine

Topic: Chemistry, General Organic Chemistry, NEET
Which order is according to the decreasing order of the oxidation state of nitrogen?

Options:
A HNO3,NO,N2,NH4Cl
B HNO3,NO,NH4Cl,N2
C NO,HNO3,NH4Cl,N2
D NO 3 − , NH 4 Cl,NO, N 2

The correct answer is:
HNO3,NO,N2,NH4Cl

Solution:
Here oxidation states of nitrogen atom are as follows
HNO3: +5
NO: +2
N2: 0
NH4Cl: -3

Topic: Chemistry, p Block Elements (Group 15, 16, 17 & 18), NEET
Which order is correct about acidity?

Options:
A CH 3 COOH>C 6 H 5 COOH>C 6 H 5 OH
B C 6 H 5 COOH>CH 3 COOH>C 6 H 5 OH
C C6 H5OH>C6H5COOH>CH3COOH
D C 6 H 5 OH>CH 3 COOH>C 6 H 5 COOH

The correct answer is:
C 6 H 5 COOH>CH 3 COOH>C 6 H 5 OH

Solution:
-I increase the acidic character while +I decrease acidic character
The correct order of acidity C 6 H 5 COOH>CH 3 COOH>C 6 H 5 OH

Topic: Chemistry, Alcohols Phenols and Ethers, NEET
Which order is correct with respect to the biodiversity of species?

Options:
A Fungi > Algae > Lichens > Angiosperm
B Angiosperm > Fungi > Algae > Lichen
C Fungi > Angiosperm > Algae > Lichen
D Mosses > Ferns > Algae > Lichens

The correct answer is:
Angiosperm > Fungi > Algae > Lichen

Solution:
Angiosperms has maximum diversity, followed by fungi and algae. Lichens are dual organism and shows minimum diversity. They are restricted to specific places only.

Topic: Biology, Biodiversity and its Conservation, NEET
Which ore contains both iron and copper?

Options:
A Cuprite
B Chalcocite
C Chalcopyrite
D Malachite

The correct answer is:
Chalcopyrite

Solution:
Among cuprite [Cu2O], Chalcocite [Cu2S] , Chalcopyrite [CuFeS2] & Malachite [CuOH2.CuCO3] , only Chalcopyrite is an ore which contains both Fe and Cu

Topic: Chemistry, General Principles and Processes of Isolation of Metals, NEET
Which ore is primarily associated with the extraction of alumina using the leaching process?

Options:
A Bauxite
B Hematite
C Galena
D Magnetite

The correct answer is:
Bauxite

Solution:
The leaching process is used to extract alumina from bauxite ore.

Topic: Chemistry, General Principles and Processes of Isolation of Metals, NEET
Which organ helps in removing CO₂ and significant amounts of water?

Options:
A Liver
B Kidneys
C Lungs
D Skin

The correct answer is:
Lungs

Solution:
The lungs remove large amounts of CO₂ (approximately 200mL/ minute) and also significant quantities of water every day.

Topic: Biology, Excretory Products and their Elimination, NEET
Which organ is oval in shape, has a dense covering, and lies in extra-abdominal pouch having two 2 to 1.5 degrees centigrade lower temperature than the body?

Options:
A Ovary
B Eyeball
C Testis
D Epididymis

The correct answer is:
Testis

Solution:
The testes - also called testicles - are two oval-shaped organs in the male reproductive system. They're contained in a sac of skin called the scrotum.

Topic: Biology, Human Reproduction, NEET
Which organ is oval in shape, has a dense covering, and lies in extra-abdominal pouch having two 2 to 2.5ºC lower temperatures than the body is?

Options:
A Ovary
B Eyeball
C Testis
D Epididymis

The correct answer is:
Testis

Solution:
The testes - also called testicles - are two oval-shaped organs in the male reproductive system. They're contained in a sac of skin called the scrotum.

Topic: Biology, Human Reproduction, NEET
Which organ is responsible for the secretion of the erythropoietin hormone?

Options:
A Heart
B Kidney
C Spleen
D Anterior pituitary

The correct answer is:
Kidney

Solution:
Erythropoietin is a peptide hormone produced by the JG (Juxtaglomerular) cells in the kidney. It stimulates the formation of RBC (erythropoiesis).

Topic: Biology, Chemical Coordination and Integration, NEET
Which organ is the largest gland in the human body?

Options:
A Liver
B Kidneys
C Lungs
D Skin

The correct answer is:
Liver

Solution:
The liver is the largest gland in the human body. It secretes bile-containing substances like bilirubin, biliverdin, cholesterol, degraded steroid hormones, vitamins, and drugs.

Topic: Biology, Excretory Products and their Elimination, NEET
Which organ may be affected by prolonged exposure to high levels of sulphate in drinking water?

Options:
A Liver
B Kidneys
C Heart
D Lungs

The correct answer is:
Liver

Solution:
Prolonged exposure to high levels of sulphate in drinking water may affect the liver.

Topic: Chemistry, Environmental Chemistry, NEET
Which organ system is present in animals belonging to the phylum Chordata?

Options:
A nervous system
B digestive system
C reproductive system
D all of the above

The correct answer is:
all of the above

Solution:
Animals belonging to the phylum Chordata possess organ-system level of organization, which means they have specialized organs and systems such as the nervous, digestive, and reproductive systems.

Topic: Biology, Animal Kingdom, NEET
Which organ system is responsible for the elimination of waste products from the body of a frog?

Options:
A Digestive system
B Circulatory system
C Respiratory system
D Excretory system

The correct answer is:
Excretory system

Solution:
The excretory system is responsible for the elimination of waste products from the body of a frog. It consists of the kidneys, which are responsible for filtering waste products from the blood and producing urine, and the cloaca, which is a common chamber for the urinary and reproductive systems.

Topic: Biology, Structural Organisation in Animals, NEET
Which organ system is responsible for the production and transportation of sperm and eggs in the body of a frog?

Options:
A Digestive system
B Circulatory system
C Respiratory system
D Reproductive system

The correct answer is:
Reproductive system

Solution:
The reproductive system is responsible for the production and transportation of sperm and eggs in the body of a frog. It consists of the testes and ovaries, which are responsible for the production of sperm and eggs, and the cloaca, which is a common chamber for the urinary and reproductive systems. Sperm and eggs are transported to the cloaca, where fertilisation occurs.

Topic: Biology, Structural Organisation in Animals, NEET
Which organ system is responsible for the transport of oxygen and carbon dioxide in the body of a frog?

Options:
A Digestive system
B Circulatory system
C Respiratory system
D Nervous system

The correct answer is:
Respiratory system

Solution:
The respiratory system is responsible for the transport of oxygen and carbon dioxide in the body of a frog. It consists of the lungs and the gills, which are specialised structures that allow the frog to extract oxygen from the water and release carbon dioxide.

Topic: Biology, Structural Organisation in Animals, NEET
Which organic compound can reduces Tollen's reagent?

Options:
A Oxalic acid
B Citric acid
C Acetic acid
D Formic acid

The correct answer is:
Formic acid

Solution:
Formic acid resemble with aldehyde due to its structure so it reduce Tollenâs reagent.
H− C O || −OH Aldehydic structure

Topic: Chemistry, Aldehydes and Ketones, NEET
Which organism behaves like plants in the presence of light and absence of organic food, but in reverse conditions behaves like animals?

Options:
A Archaebacteria
B Euglena
C Nostoc
D Paramecium

The correct answer is:
Euglena

Solution:
Euglena having chlorophyll, photosynthesize and produce food while in reverse condition Euglena consumes food and behave like animals.

Topic: Biology, Biological Classification, NEET
Which organism does not produce oxygen during photosynthesis?

Options:
A Anabaena
B Funaria
C Higher plants
D Rhodospirillum

The correct answer is:
Rhodospirillum

Solution:
All prokaryotes carry out anoxygenic photosynthesis. They lack PS II, thus they cannot use water as a source of hydrogen but uses hydrogen sulphide as a source of hydrogen instead. Rhodospirillum is a photosynthetic bacteria.

Topic: Biology, Photosynthesis in Higher Plants, NEET
Which organism has more than one nucleus per cell?

Options:
A Humans
B Plants
C Amoeba
D Fungi

The correct answer is:
Amoeba

Solution:
Amoeba, a single-celled organism, has more than one nucleus per cell. This is known as a coenocyte.

Topic: Biology, Cell - The Unit of Life, NEET
Which organism is not included in the Kingdom Protista?

Options:
A Chlamydomonas
B Chlorella
C Paramoecium
D Spirogyra

The correct answer is:
Spirogyra

Solution:
The Kingdom Protista includes Chlamydomonas, Chlorella, and Paramoecium, but it does not include elephants, which are not classified as protists. Spirogyra belongs to algae.

Topic: Biology, Biological Classification, NEET
Which organism is used as biocontrol agents of several plant pathogens?

Options:
A Baculoviruses
B Bacillus thuringiensis
C Dragon flies
D Trichoderma

The correct answer is:
Trichoderma

Solution:
A biological control being developed for use in the treatment of plant disease is the fungus Trichoderma. Trichoderma species are free-living fungi that are very common in the root ecosystems. They are effective biocontrol agents of several plant pathogens.

Topic: Biology, Microbes in Human Welfare, NEET
Which organisms are autotrophic in nature?

Options:
A Animals
B Plants
C Fungi
D Bacteria

The correct answer is:
Plants

Solution:
Autotrophic nutrition is found only in plants and all other organisms depend on the green plants for food, making them heterotrophs.

Topic: Biology, Photosynthesis in Higher Plants, NEET
Which organisms are capable of fixing nitrogen?

Options:
A Mycoplasma
B Cyanobacteria
C Fungi
D All of the above

The correct answer is:
Cyanobacteria

Solution:
Cyanobacteria are capable of fixing nitrogen with the help of specialised cells called the heterocyst.

Topic: Biology, Biological Classification, NEET
Which organisms are immortal?

Options:
A Single-celled organisms
B Multi-cellular organisms
C Animals
D Plants

The correct answer is:
Single-celled organisms

Solution:
The author mentions that no individual is immortal except single-celled organisms.

Topic: Biology, Reproduction in Organisms, NEET
Which organisms show great synchrony between the sexes and release a large number of gametes into the surrounding medium (water)?

Options:
A Bony fishes
B Frogs
C Birds
D All of the above

The correct answer is:
Bony fishes

Solution:
Organisms exhibiting external fertilisation show great synchrony between the sexes and release a large number of gametes into the surrounding medium (water) in order to enhance the chances of syngamy. This happens in the bony fishes and frogs where a large number of offspring are produced.

Topic: Biology, Reproduction in Organisms, NEET
Which organisms undergo development of female gamete without fertilisation?

Options:
A Rotifers
B Honeybees
C Lizards
D All of the above

The correct answer is:
All of the above

Solution:
In some organisms like rotifers, honeybees and even some lizards and birds (turkey), the female gamete undergoes development to form new organisms without fertilisation. This phenomenon is called parthenogenesis.

Topic: Biology, Reproduction in Organisms, NEET
Which organization publishes the 'Red Data Book'?

Options:
A IUCN
B UNEP
C WWF
D GEF

The correct answer is:
IUCN

Solution:
International union of conservation of nature and natural resource with its head quarter at Morrgis, Switzerland, publishes Red Data Book which keep the record of extinct and threatened species

Topic: Biology, Biodiversity and its Conservation, NEET
Which organs help in the elimination of excretory waste besides kidneys?

Options:
A Lungs
B Liver
C Skin
D All of the above

The correct answer is:
All of the above

Solution:
Besides kidneys, lungs, liver, and skin also help in the elimination of excretory waste. The lungs remove CO₂ and water, the liver secretes bile-containing substances, and the skin eliminates excretory waste through sweat and sebum.

Topic: Biology, Excretory Products and their Elimination, NEET
Which organs in the human body can be damaged by lead exposure through drinking water?

Options:
A Brain and lungs
B Kidney, liver, and reproductive system
C Heart and skin
D Stomach and intestines

The correct answer is:
Kidney, liver, and reproductive system

Solution:
Lead exposure through drinking water can damage the kidney, liver, and reproductive system, among other health concerns.

Topic: Chemistry, Environmental Chemistry, NEET
Which orientation of the short bar magnet with a magnetic moment of m = 0.32 JT⁻¹ placed in a uniform magnetic field of 0.15 T corresponds to its stable position?

Options:
A m parallel to B
B m at a 60-degree angle to B
C m perpendicular to B
D m at a 45-degree angle to B

The correct answer is:
m parallel to B

Solution:
Correct Option is : (A)
m parallel to B

Topic: Chemistry, Magnetic Properties of Matter, NEET