datavorous/entrance-exam-dataset huggingface dataset:
Which one of the following organisms is scientifically correctly named, correctly printed according to the International Rules of Nomenclature and correctly described?

Options:
A Musca domestica-The common house lizard, a reptile
B Plasmodium falciparum-A protozoan pathogen causing the most serious type of malaria
C Felis tigris-The Indian tiger, well protected in Gir forests
D E.coli-Full name Entamoeba coli, a commonly occurring bacterium in human intestine

The correct answer is:
Plasmodium falciparum-A protozoan pathogen causing the most serious type of malaria

Solution:
According to binomial nomenclature the scientific name is consist of genus and species. The genus name is started with capital letter and both the word latinized. Musca domestica is European housefly. It belongs to phylumArthropoda.
E.coli is having full name Escherichia coli a commonly occurring bacterium in human intestine.
Panthera tigris is Indian tiger and protected in Gir forest.

Topic: Biology, The Living World, NEET, NEET 2012 (Mains)
Which one of the following $\mathrm{p}-\mathrm{V}$ diagrams is correct for an isochoric process?

Options:
A IV
B II
C III
D I

The correct answer is:
III

Solution:
In isochoric process, volume remains constant.

Topic: Physics, Thermodynamics, MHT CET, MHT CET 2021 (24 Sep Shift 2)
Which one of the following pairs correctly matches a hormone with a disease resulting from its deficiency?

Options:
A Luteinizing - Failure of hormone ovulation
B Insulin - Diabetes insipidus
C Thyroxine - Tetany
D Parathyroid - Diabetes hormone mellitus.

The correct answer is:
Luteinizing - Failure of hormone ovulation

Solution:
The ovulatory phase witnesses the maximum concentration of both oestrogen and progesterone. LH starts the change of empty Graafian follicle into corpus luteum and secretion of progesterone from corpus luteum is responsible for the maintenance of the endometrium.
Diabetes mellitus - Insulin
Tetany - Parathormone
Diabetes insipidus - ADH

Topic: Biology, Chemical Coordination and Integration, NEET, NEET 2004
Which one of the following pairs is an example of polar molecular solids?

Options:
A SO2( s),CO2( s)
B SO2( s),NH3( s)
C MgO(s),SO2s
D HCl(s),AlN(s)

The correct answer is:
SO2( s),NH3( s)

Solution:
SO2 is a bent molecule with a central sulfur atom bonded to two oxygen atoms. The oxygen atoms are more electronegative than sulfur, causing a separation of charge. This results in a bent molecular geometry and a net dipole moment, making SO2 a polar molecule.

NH3 is a trigonal pyramidal molecule with a central nitrogen atom bonded to three hydrogen atoms. Again, the electronegativity difference between nitrogen and hydrogen leads to a separation of charge. The arrangement of the atoms in NH3 gives it a net dipole moment, making it a polar molecule.

Topic: Chemistry, Chemical Bonding and Molecular Structure, JEE Main, JEE Main 2023 (11 Apr Shift 2)
Which one of the following pairs is isostructural (i.e., having the same shape and hybridization)?

Options:
A $\left[\mathrm{BCl}_{3}\right.$ and $\left.\mathrm{BrCl}_{3}^{-}\right]$
B $\left[\mathrm{NH}_{3}\right.$ and $\left.\mathrm{NO}_{3}^{-}\right]$
C $\left[\mathrm{NF}_{3}\right.$ and $\left.\mathrm{BF}_{3}\right]$
D $\left[\mathrm{BF}_{4}^{-}\right.$ and $\left.\mathrm{NH}_{4}^{+}\right]$

The correct answer is:
$\left[\mathrm{BF}_{4}^{-}\right.$ and $\left.\mathrm{NH}_{4}^{+}\right]$

Solution:
$\mathrm{BF}_{4}^{-}$ hybridisation $\mathrm{sp}^{3}$, tetrahedral structure.

$\mathrm{NH}_{4}^{+}$ hybridisation $s p^{3},$ tetrahedral structure.

Topic: Chemistry, Chemical Bonding and Molecular Structure, JEE Main
Which one of the following pairs is isostructural (i.e., having the same shape and hybridization)?

Options:
A $\left[\mathrm{BCl}_3\right.$ and $\left.\mathrm{BrCl}_3\right]$
B $\left[\mathrm{NH}_3\right.$ and $\left.\mathrm{NO}_3^{-}\right]$
C $\left[\mathrm{NF}_3\right.$ and $\left.\mathrm{BF}_3\right]$
D $\left[\mathrm{BF}_4^{-}\right.$and $\left.\mathrm{NH}_4^{+}\right]$

The correct answer is:
$\left[\mathrm{BF}_4^{-}\right.$and $\left.\mathrm{NH}_4^{+}\right]$

Solution:
If number of bond pairs and lone pairs are same for the given pairs, they are isostructural.
(a)
(b)
(c)
(d)
Thus, $\mathrm{BF}_4^{-}$and $\mathrm{NH}_4^{+}$are isostructural.

Topic: Chemistry, Chemical Bonding and Molecular Structure, JEE Main
Which one of the following pairs is mismatched?

Options:
A fossil fuel burning - release of $\mathrm{CO}_2$
B nuclear power - radioactive wastes
C solar energy - greenhouse effect
D biomass burning - release of $\mathrm{CO}_2$

The correct answer is:
solar energy - greenhouse effect

Solution:
The following question represent the source and effect. Solar energy does not causes greenhouse effect.
Related Theory
The greenhouse effect is a natural process that warms the Earth's surface. When the Sun's energy reaches the Earth's atmosphere, some of it is reflected back to space and the rest is absorbed and re-radiated by greenhouse gases. Greenhouse gases include water vapour, carbon dioxide, methane, nitrous oxide, ozone and some artificial chemicals such as chlorofluorocarbons (CFCs). The absorbed energy warms the atmosphere and the surface of the Earth. This process maintains the Earth's temperature at around 33 degrees Celsius warmer than it would otherwise be, allowing life on Earth to exist.

Topic: Biology, Environmental Issues, NEET, NEET 2005
Which one of the following pairs is mismatched?

Options:
A Biomass burning $\quad$ - Release of $\mathrm{CO}_2$
B Fossil fuel burning - Release of $\mathrm{CO}_2$
C Nuclear power — Radioactive wastes
D Solar energy — Green house effect

The correct answer is:
Solar energy — Green house effect

Solution:
Solar energy is not responsible for green house effect instead it is a source of energy for the plants and animals. Green plants prepare their food by the use of this solar energy. $\mathrm{CO}_2$ gas is mainly responsible for green house effect. Excess of this gas forms a thick layer around the earth and prevents re-radiation of entering sun rays to atmosphere. Thus functions like the glass panels of a green house (or the glass windows of a motor car). This is so called green house effect.

Topic: Biology, Environmental Issues, JIPMER, JIPMER 2007
Which one of the following pairs is not correctly matched?

Options:
A Recombinant DNA	- DNA formed by the joining of segments of DNA from different sources
B Purine - Nitrogenous bases Cytosine, thymine and uracil
C ATP	- The principal energy carrying compound in the cell
D r-RNA	- RNA molecules found in ribosomes

The correct answer is:
Purine - Nitrogenous bases Cytosine, thymine and uracil

Solution:
Cytosine, thymine, and uracil are single ring compounds i.e. pyrimidines while adenine and guanine are purines.

Topic: Chemistry, Biomolecules, JEE Main
Which one of the following pairs is wrongly matched?

Options:
A Textile - amylase
B Detergents - lipase
C Alcohol - nitrogenase
D Fruit juice - pectinase

The correct answer is:
Alcohol - nitrogenase

Solution:
No Solution Available

Topic: Biology, Microbes in Human Welfare, NEET, NEET 2009 (Mains)
Which one of the following pairs is wrongly matched?

Options:
A Ginkgo - Archegonia
B Salvinia - Prothallus
C Viroids - RNA
D Mustard - Synergids

The correct answer is:
Salvinia - Prothallus

Solution:
Salvinia is a heterosporoues water fern. The microsporangia and megasporangia are borne within special reproductive structure called sporocarps. These are borne terminally in clusters on the segment of submerged leaves. Sporocarps are strictly monosporangiate, i.e., they bear either only microsporangia or megasporangia.
Viroids are single stranded RNA molecules. The female reproductive organ is archegonia in gymnosperms.

Topic: Biology, Plant Kingdom, NEET, NEET 2012 (Mains)
Which one of the following pairs is wrongly matched while the remaining three are correct?
$\begin{array}{lll}\text { (a) Penicillium } & - & \text { Conidia } \\ \text { (b) Water hyacinth } & - & \text { Runner } \\ \text { (c) Bryophyllum } & - & \text { Leat buds } \\ \text { (d) Agave } & - & \text { Bulbils }\end{array}$

Options:
A (a)
B (b)
C (c)
D (d)

The correct answer is:
(b)

Solution:
Water hyacinth (Eichhornia crassipes) and water lettuce (Pistia stratiotes) are offset in which a lateral branch is with short internodes and each node bears a rosette of leaves and a tuff of roots. Runner is a slender lateral branch which arises from the base of the main axis and after growing aerially for some time arches downwards to tuch the ground, e.g., doob grass, mint, jasmine, etc.

Topic: Biology, Morphology of Flowering Plants, NEET, NEET 2011 (Mains)
Which one of the following pairs of animals are similar to each other pertaining to the feature stated against them?

Options:
A Pteropus and Ornithorhynchus-Viviparity
B Garden lizard and crocodile-three chambered heart
C Ascaris and Ancylostoma-Metameric segmentation
D Sea horse and flying fish-Cold blooded (poikilothermal)

The correct answer is:
Sea horse and flying fish-Cold blooded (poikilothermal)

Solution:
Metameric segmentation is found in Annelida not Nematoda (Ascaris).
Crocodile has four-chambered heart.
Sea horse and flying fish belong to class-Pisces. These are cold-blooded animals.
Ornithorhynchus is oviparous mammal.

Topic: Biology, Animal Kingdom, NEET, NEET 2012 (Mains)
Which one of the following pairs of animals comprises 'Jawless fishes' ?

Options:
A Guppies and hag fishes
B Lampreys and eels
C Mackerals and Rohu
D Lampreys and hag fishes

The correct answer is:
Lampreys and hag fishes

Solution:
No Solution Available

Topic: Biology, Animal Kingdom, NEET, NEET 2009 (Mains)
Which one of the following pairs of chemical substances, is correctly categorised?

Options:
A Calcitonin and thymosin-Thyroid hormones
B Pepsin and prolactin-Two digestive enzymes secreted in stomach
C Troponin and myosin-Complex proteins in striated muscles
D Secretin and rhodopsin-Polypeptide hormones

The correct answer is:
Troponin and myosin-Complex proteins in striated muscles

Solution:
Striated muscle consists of large number of muscle fibres called myofibrils. Myofibrils are made up of actin and myosin protein. The actin or secondary myofilaments also possess troponin and tropomyosin protein.
Thymosin hormone is secreted from thymus gland. Prolactin is a hormone secreted from anterior lobe of pituitary
Rhodopsin is a pigment found in rod cells of eye.

Topic: Biology, Chemical Coordination and Integration, NEET, NEET 2012 (Mains)
Which one of the following pairs of codons is correctly matched with their function or the signal for the particular amino acid?

Options:
A UUA, UCA - Leucine
B GUU, GCU - Alanine
C UAG, UGA - Stop
D AUG, ACG - Start / Methionine

The correct answer is:
UAG, UGA - Stop

Solution:
UAA, UAG and UGA are nonsense or terminating or stop codons as these are responsible for the termination of translation.

Topic: Biology, Molecular Basis of Inheritance, NEET, NEET 2008 (Mains)
Which one of the following pairs of food compounds in humans reaches the stomach totally undigested -

Options:
A Starch and cellulose
B Protein and starch
C Starch and fat
D Fat and cellulose

The correct answer is:
Fat and cellulose

Solution:
No Solution Available

Topic: Biology, Digestion and Absorption, NEET, NEET 2009 (Mains)
Which one of the following pairs of isomers is an example of metamerism?

Options:
A
B
C
D

The correct answer is:

Solution:
Compounds given in option (A) are chain isomers.

Compounds given in option (B) are not isomers since molecular formula is not same.

Compounds given in option (C) are position isomers.

Distribution of alkyl groups around polyvalent functional group (-O-, -CO-, -COO- etc.)give rise to metamers and phenomenon is called metamerism.

Topic: Chemistry, General Organic Chemistry, JEE Main, JEE Main 2021 (20 Jul Shift 2)
Which one of the following pairs of items correctly belongs to the category of organs mentioned against it?

Options:
A Wings of honey-bee and wings of crow - Homologous organs
B Thorn of Bougainvillea and tendrils of Cucurbita - Analogous organs
C Nictitating membrane and blind spot in human eye - Vestigial organs
D Nephridia of earthworm and malpighian tubules of cockroach - Excretory organs

The correct answer is:
Nephridia of earthworm and malpighian tubules of cockroach - Excretory organs

Solution:
Wings of honey bee and the wings of crow are analogous.
Thorn of Bougaivillea and tendrils of Cucurbita are homologous.
Blind spot in humans represent the point where the optic nerve will leave the eye ball so it is not vestigeal.

Topic: Biology, Evolution, NEET, NEET 2008 (Mains)
Which one of the following pairs of molecules will have permanent dipole moments for both members?

Options:
A
$\mathrm{NO}_2$ and $\mathrm{CO}_2$

B
$\mathrm{NO}_2$ and $\mathrm{O}_3$

C
$\mathrm{SiF}_4$ and $\mathrm{CO}_2$

D
$\mathrm{SiF}_4$ and $\mathrm{NO}_2$

The correct answer is:
$\mathrm{NO}_2$ and $\mathrm{O}_3$

Solution:
Both $\mathrm{NO}_2$ and $\mathrm{O}_3$ have angular shape and hence will have net dipole moment.

Topic: Chemistry, Chemical Bonding and Molecular Structure, JEE Main, JEE Main 2003
Which one of the following pairs of nitrogenous bases of nucleic acids, is wrongly matched with the category mentioned against it?

Options:
A Adenine, Thymine - Purines
B Thymine, Uracil - Pyrimidines
C Uracil, Cytosine - Pyrimidines
D Guanine, Adenine - Purines

The correct answer is:
Adenine, Thymine - Purines

Solution:
Adenine and guanine are purines, whereas, Uracil, Thymine, Cytosine are pyrimidines.

Topic: Biology, Molecular Basis of Inheritance, NEET, NEET 2008 (Mains)
Which one of the following pairs of plant structures has haploid number of chromosomes?

Options:
A Egg nucleus and secondary nucleus
B Megaspore mother cell and antipodal cells
C Egg cell and antipodal cells
D Nucellus and antipodal cells

The correct answer is:
Egg cell and antipodal cells

Solution:
Egg cell and antipodal cells : They are part of the female gametophyte.

Topic: Biology, Sexual Reproduction in Flowering Plants, NEET, NEET 2008 (Mains)
Which one of the following pairs of reactants
does not form oxygen when they react with
each other?

Options:
A $\mathrm{F}_2, \mathrm{NaOH}$ solution (hot, conc.)
B $\mathrm{F}_2, \mathrm{H}_2 \mathrm{O}$
C $\mathrm{Cl}_2, \mathrm{NaOH}$ solution (cold, dilute)
D $\mathrm{CaOCl}_2, \mathrm{H}_2 \mathrm{SO}_4$ (dilute, small amount)

The correct answer is:
$\mathrm{Cl}_2, \mathrm{NaOH}$ solution (cold, dilute)

Solution:
$\mathrm{Cl}_2+\underset{\text { cold, dil }}{2 \mathrm{NaOH}} \longrightarrow \mathrm{NaCl}+\mathrm{NaClO}+\mathrm{H}_2 \mathrm{O}$
Chlorine react with cold and dilute NaOH to give
sodium hypochlorite.

Topic: Chemistry, p Block Elements (Group 15, 16, 17 & 18), JEE Main
Which one of the following pairs of species have the same bond order?

Options:
A
$\mathrm{CN}^{-}$and $\mathrm{NO}^{+}$

B
$\mathrm{CN}^{-}$and $\mathrm{CN}^{+}$

C
$\mathrm{O}_2^{-}$and $\mathrm{CN}^{-}$

D
$\mathrm{NO}^{+}$and $\mathrm{CN}^{+}$

The correct answer is:
$\mathrm{CN}^{-}$and $\mathrm{NO}^{+}$

Solution:
Both are isoelectronic and have same bond order.

Topic: Chemistry, Chemical Bonding and Molecular Structure, JEE Main, JEE Main 2008
Which one of the following pairs of structures distinguishes a nerve cell from other types of cell?

Options:
A vacuoles and fibres
B flagellum and medullary sheath
C nucleus and mitochondria
D perikaryon and dendrites.

The correct answer is:
perikaryon and dendrites.

Solution:
A nerve cell consists of cell body (perikaryon) containing the nucleus, Nissl granules, dendrites and an axon. These are specialised cells meant for the transmission of the nerve.
Related Theory
The main functions of the myelin sheath in neuron are:
(I) It acts as an electrical insulator for the neuron.
(2) The sheath prevents the movement of ions into or out of the neuron, thus preventing depolarisation.
(3) It speeds up transmission of an electrical impulse in the neuron - impulses cannot travel through the sheath (the sheath acts as an electrical insulator), instead, impulses 'jump' from a gap in the myelin sheath to another gap (it jumps from one Node of Ranvier to another Node). This is a process called Saltatory Conduction.

Topic: Biology, Neural Control and Coordination, NEET, NEET 2007
Which one of the following pairs of structures is correctly matched with their correct description?

Options:
A (a)
B (b)
C (c)
D (d)

The correct answer is:
(b)

Solution:
Cornea is the transparent anterior portion of the outer coat of the vertebrate eye covering the iris and the pupil. It is avascular as it lacks lymphatic and blood vessels.

Topic: Biology, Locomotion and Movement, NEET, NEET 2010 (Mains)
Which one of the following pairs of substances on reaction will not evolve H2 gas?

Options:
A Iron and steam
B Iron and H 2 S O 4 (aqueous)
C Copper and HCl (aqueous)
D Sodium and ethyl alcohol

The correct answer is:
Copper and HCl (aqueous)

Solution:
Fe+dil.  H 2 SO 4 → FeSO 4 + H 2 ↑
3 Fe+4 H 2 O g → Fe 3 O 4 +4 H 2 ↑
Cu+dil. HCl→ No reaction
2Na+C2H5OH→2C2H5ONa+H2↑
Copper does not evolve H 2 from acid as it is below hydrogen in electrochemical series. The electrochemical series is built up by arranging various redox equilibria in order of their standard electrode potential (redox potential). The most negative E° values are placed at the top of the electrochemical series, and the most positive at the bottom.
Metals at the top of the series are good at giving away electrons.

Topic: Chemistry, s Block Elements, JEE Main
Which one of the following pairs of the kind of cells and their secretion is correctly matched?

Options:
A Oxyntic cells --- a secretion with $\mathrm{pH}$ between 2.0 and 3.0
B Alpha cells of islets of Langerhans --secretion that decreases blood sugar level
C Kupffer cells - a digestive enzyme that hydrolyses nucleic acids
D Sebaceous glands --- a secretion that evaporates for cooling

The correct answer is:
Sebaceous glands --- a secretion that evaporates for cooling

Solution:
Oxyntic (or parietal) cell is present in the wall of the stomach that produce $\mathrm{HCl}$ which forms the part of gastric juice. Oxyntic cell also produce intrinsic factor which is involved in the absorption of vitamin $\mathrm{B}_{12}$ in the small intestine. The $\mathrm{pH}$ of gastric acid is 2-3 in the stomach of the lumen. The acidity being maintained by the proton pump, $\mathrm{a} \mathrm{H}^{+} /$ $\mathrm{K}^{+}$ATPase.
Alpha cell of islets of langerhans secrete glucagon hormone which raises blood glucose level by stimulating liver to convert glycogen to glucose and by stimulating the conservation of fatty acids and amino acids to glucose.
Kupffer cells are specialized macrophages that disposes of old blood cells and particulate matter. Kupffer cells, named after Karl Wilhem Von Kupffer, are found in the bloodstreams and in the liver, attached to the walls of the sinusoids. Sebaceous gland is a simple or branched glands in the skin that secrete an oily substance, sebum which is fatty mildly antiseptic material that protects, lubricates, and waterproofs the skin and hair and help prevent dessication.

Topic: Biology, Digestion and Absorption, AIIMS, AIIMS 2006
Which one of the following phenols does not give colour when condensed with phthalic anhydride in presence of conc. H2SO4 ?

Options:
A
B
C
D

The correct answer is:

Solution:
Phenol and its derivatives react at para position with phthalic anhydride. In $\mathrm{p}$-cresol para position is blocked. So reaction not possible.

Topic: Chemistry, Alcohols Phenols and Ethers, JEE Main, JEE Main 2021 (26 Aug Shift 2)
Which one of the following phyla is correctly matched with its two general characteristics?

Options:
A Mollusca - Normally oviparous and development through a trochophore or veligerlarva
B Arthropoda - Body divided into head, thorax and abdomen and respiration by tracheae
C Chordata - Notochord at some stage and separate anal and urinary openings to the outside
D Echinodermata - Pentamerous radial symmetry and mostly internal fertilization

The correct answer is:
Mollusca - Normally oviparous and development through a trochophore or veligerlarva

Solution:
No Solution Available

Topic: Biology, Animal Kingdom, NEET, NEET 2008 (Mains)
Which one of the following plants is monoecios?

Options:
A Papaya
B Marchantia
C Pinus
D Cycas

The correct answer is:
Pinus

Solution:
No Solution Available

Topic: Biology, Plant Kingdom, NEET, NEET 2009 (Mains)
Which one of the following plots is correct for the behaviour of ideal and real gases?

Options:
A
B
C
D

The correct answer is:

Solution:
In option 1, all curves belong to ideal gas equation at constant temperature. p=nRT×V-1

In option 2, all curves belong to ideal gas equation at constant volume.

p=nRV×T

In option 3, all curves belong to real gas equation which follow Vanderwaal's equation.

In option 4,

When the pressure tends to be infinity, the volume of the ideal gas tends to be zero, and the volume of the real gas does not. It tends to be the proper volume of the molecules, which is greater than zero. This is exactly what you see on the upper part of the picture.

And when the pressure is extremely low, the volume increases but not as much as calculated with the ideal law, because there is a little attraction between the molecules. This is exactly what you see on your picture if you draw a horizontal line in its lower part.

Topic: Chemistry, States of Matter, JEE Main
Which one of the following plots represents the variation of gravitational field on a particle with distance $r$ due to a thin spherical shell of radius $R$ ? ( $r$ is measured from the centre of the spherical shell).

Options:
A

B

C

D

The correct answer is:

Solution:
Inside the shell, $E=0$ and outside the shell, $E \propto \frac{1}{r}$
Hence, graph (b) shows the exact result.

Topic: Physics, Gravitation, JEE Main
Which one of the following plots represents the variation of gravitational field on a particle with distance $r$ due to a thin spherical shell of radius $R$ ? ( $r$ is measured from the centre of the spherical shell).

Options:
A

B

C

D

The correct answer is:

Solution:
Inside the shell, $E=0$ and outside the shell, $E \propto \frac{1}{r}$
Hence, graph (b) shows the exact result.

Topic: Physics, Gravitation, NEET, NEET 2012 (Mains)
Which one of the following polymers is not obtained by condensation polymerisation ?

Options:
A Nylon 6, 6
B Buna – N
C Bakelite
D Nylon 6

The correct answer is:
Buna – N

Solution:
The polymers made by addition polymerisation from two different monomers are termed as copolymers, e.g., Buna-S, Buna-N, etc.

Bakelite is a condensation polymer of formaldehyde and phenol . In practice, the phenol and formaldehyde are first polymerized to a small extent by using the proper choice of catalyst and temperature.

Nylon is also condensation polymer.

Topic: Chemistry, Polymers, JEE Main, JEE Main 2020 (05 Sep Shift 2)
Which one of the following population interactions is widely used in medical science for the production of antibiotics?

Options:
A Parasitism
B Mutualism
C Commensalism
D Amensalism

The correct answer is:
Amensalism

Solution:
Amensalism is any relationship between organisms of different species in which one organism is inhibited or destroyed while the other organism remains unaffected. It is a type of ecological interaction. A very prominent example of ammensalism is observed during the production of antibiotics. The production of penicillin by Penicillium on a nutrient agar medium shows a zone of inhibition in which other microbes cannot grow. This interaction is also called antibiosis, in which Penicillium gains nothing but adversely affects other microbes.

Topic: Biology, Organisms and Populations, NEET, NEET 2018