datavorous/entrance-exam-dataset huggingface dataset:
Orthodox seeds can be preserved for long periods at a temperature of

Options:
A –196oC
B â10o to â20oC
C 0o – 4oC
D 10o to 15oC

The correct answer is:
–10o to –20oC

Solution:
Orthodox seeds survive to dry or freezing during ex situ conservation, as opposed to recalcitrant seeds. Orthodox seeds which can be partially dried (up to 5% moisture) and can be stored indefinitely at low temperature (â10Â° to â20Â°C) e.g., cereals. In a seed, the embryo is present in a dormant state. The moisture contents of seeds are kept low (5-15%) and they are stored at low temperature (â10oC to â20oC) with a supply of little oxygen.

Topic: Biology, Biodiversity and its Conservation, NEET
Osmosis is the passage of water through a semipermeable membrane from

Options:
A A higher concentration of water molecules to lower concentration
B Lower concentration of water molecules to higher concentration
C Equal concentration of water molecules
D None of the above

The correct answer is:
A higher concentration of water molecules to lower concentration

Solution:
Osmosis is the migration of solvent from a hypotonic solution (of lower concentration) to the hypertonic solution (of higher concentration) through a semipermeable membrane. The movement of water out of the cell is called exosmosis while movement of water inside cell is called endosmosis.

Topic: Biology, Transport in Plants, NEET
Osmotic pressure of 40% (W/V) urea solution is 1.64 atm and that of 3.42% (W/V) cane sugar is 2.46 atm. When equal volumes of the above two solutions are mixed, the osmotic pressure of resulting solution is

Options:
A 1.64 atm
B 2.46 atm
C 4.10 atm
D 2.05 atm

The correct answer is:
2.05 atm

Solution:
Ï 1 V 1 â+â Ï 2 V 2 â=â Ï R (V 1 +V 2 )
164Ã1+2.46Ã1=ÏRÃ2
ÏR=4.102
=2.05 atm
Here, π R =Osmotic pressure of resulting solution.

Topic: Chemistry, Solutions, NEET
Osmotrophs are components of

Options:
A grazing food chain
B detritus food chain
C both grazing and detritus food chains
D neither grazing nor detritus food chain

The correct answer is:
detritus food chain

Solution:
Microbes that release enzymes on dead organisms, break them into simpler organic compounds and the absorb them are called osmotrophs or micorconsumers or decomposers. Examples are bacteria and fungi; they are components of the detritus food chain.

Topic: Biology, Ecosystem, NEET
Osteoporosis, an age-related disease of the skeletal system, may occur due to

Options:
A Immune disorder affecting neuromuscular junction leading to fatigue
B High concentration of Ca++ and Na+
C Decreased level of estrogen
D Accumulation of uric acid leading to inflammation of joints

The correct answer is:
Decreased level of estrogen

Solution:
Osteoporosis is the age-related disorder characterized by decreased bone mass and increased chances of fractures. Decreased levels of estrogen is a common cause.

Topic: Biology, Locomotion and Movement, NEET, NEET 2016 (Phase 2)
Osteoporosis, an age-related disease of the skeletal system, may occur due to

Options:
A Immune disorder affecting neuromuscular junction leading to fatigue
B High concentration of Ca++ and Na+
C Decreased level of estrogen
D Accumulation of uric acid leading to inflammation of joints

The correct answer is:
Decreased level of estrogen

Solution:
Osteoporosis is the age-related disorder characterized by decreased bone mass and increased chances of fractures. Decreased levels of estrogen is a common cause.

Topic: Biology, Locomotion and Movement, NEET
Other than gene therapy, which of the following temporary remedies have been previously used for treating ADA deficiency?

Options:
A Therapy with monoclonal antibodies
B Bone marrow transplantation
C Plasma therapy
D Treatment with antibiotics or vaccines

The correct answer is:
Bone marrow transplantation

Solution:
The first clinical gene therapy was given in 1990 to a 4-year old girl with adenosine deaminase (ADA) deficiency. This enzyme is crucial for the immune system to function. The disorder is caused due to the deletion of the gene for adenosine deaminase. In some children ADA deficiency can be cured by bone marrow transplantation; in others it can be treated by enzyme replacement therapy, in which functional ADA is given to the patient by injection. But the problem with both of these approaches that they are not completely curative.

Topic: Biology, Biotechnology and Its Applications, NEET
Other than sexual contact, HIV is transmitted through

Options:
A repeated blood transfusions
B intramuscular administration of drugs
C mere touch and physical contact
D both (A) and (B)

The correct answer is:
repeated blood transfusions

Solution:
Transmission of HIV-infection generally occurs by (a) sexual contact with infected person, (b) by transfusion of contaminated blood and blood products, (c) by sharing infected needles as in the case of intravenous drug abusers and (d) from infected mother to her child through placenta. So, people who are at high risk of getting this infection includes - individuals who have multiple sexual partners, drug addicts who take drugs intravenously, individuals who require repeated blood transfusions and children born to an HIV infected mother. It is important to note that HIV/AIDS is not spread by mere touch or physical contact; it spreads only through body fluids. It is, hence, imperative, for the physical and psychological well-being, that the HIV/AIDS infected persons are not isolated from family and society.

Topic: Biology, Human Health and Diseases, NEET
Our fore arm is made of three different bones. Name them.

Options:
A Humerus, radius, Ulna
B Femur, ulna, Carpels
C Humerus, Femur, Carpels
D None of the above

The correct answer is:
None of the above

Solution:
Our fore arm is made of radius, ulna and carpals.

Topic: Biology, Locomotion and Movement, NEET
Out of 2-chloroethanol and ethanol which is more acidic and why?

Options:
A 2-Chloroethanol is more acidic because chlorine is more basic than oxygen.
B Ethanol is more acidic because the presence of a chlorine atom in 2-chloroethanol does not significantly affect its acidity compared to ethanol.
C Ethanol is more acidic because it has a larger molecular size compared to 2-chloroethanol, leading to increased acidity.
D Due to the -I effect (electron withdrawing group) of Cl atom electron density in the O-H bond decreases. So, O-H bond of 2-chloroethanol becomes weaker than the O-H bond of ethanol. Thus, 2-chloroethanol is more acidic than ethanol.

The correct answer is:
Due to the -I effect (electron withdrawing group) of Cl atom electron density in the O-H bond decreases. So, O-H bond of 2-chloroethanol becomes weaker than the O-H bond of ethanol. Thus, 2-chloroethanol is more acidic than ethanol.

Solution:
Correct Option is : (D)
Due to the -I effect (electron withdrawing group) of Cl atom electron density in the O-H bond decreases. So, O-H bond of 2-chloroethanol becomes weaker than the O-H bond of ethanol. Thus, 2-chloroethanol is more acidic than ethanol.

Topic: Chemistry, Alcohols Phenols and Ethers, NEET
Out of 64 codons, 61 codons code for 20 types of amino acid. This characteristic is known as

Options:
A Degeneracy of genetic code
B Overlapping of gene
C Wobbling of codon
D Universality of codons

The correct answer is:
Degeneracy of genetic code

Solution:
Out of 64 codons, only 3 signify stop codons. There is more than one codon for most of the amino acids, the genetic code is non-over lapping. Three successive nucleotides or bases code for only one amino acid wobbling refers to the third base degeneracy.

Topic: Biology, Molecular Basis of Inheritance, NEET
Out of 64 codons, 61 codons code for 20 types of amino acid. This characteristics of genetic code is called

Options:
A degeneracy of genetic code
B overlapping of gene
C Unambiguous nature of codon
D universality of codons.

The correct answer is:
degeneracy of genetic code

Solution:
There are 64 codons to specify 20 amino acid. Since number of codon is more than number of amino acid to be specified, one amino acid can be coded by more than one codon, this nature is called as degeneracy of genetic code.

Topic: Biology, Molecular Basis of Inheritance, NEET
Out of benzene, m–dinitrobenzene and toluene which will undergo nitration most easily and why?

Options:
A Toluene will undergo nitration most easily because it has a methyl group, which is an electron-donating group, enhancing the reactivity of the benzene ring.
B M-dinitrobenzene will undergo nitration most easily because it already has nitro groups, which are strong electron-withdrawing groups, increasing the reactivity of the benzene ring.
C Benzene will undergo nitration most easily because it is the simplest compound and has no substituents that affect its reactivity.
D All three compounds will undergo nitration with equal ease because nitration primarily depends on the availability of the electrophile, HNO3.

The correct answer is:
Toluene will undergo nitration most easily because it has a methyl group, which is an electron-donating group, enhancing the reactivity of the benzene ring.

Solution:
Correct Option is : (A)
Toluene will undergo nitration most easily because it has a methyl group, which is an electron-donating group, enhancing the reactivity of the benzene ring.

Topic: Chemistry, Hydrocarbons, NEET
Out of C6H5CH2Cl and C6H5CHClC6H5, which is more easily hydrolysed by aqueous KOH?

Options:
A C6H5CHClC6H5
B C6H5CH2Cl
C Both are equally likely to get hydrolysed
D None of them can be hydrolysed

The correct answer is:
C6H5CHClC6H5

Solution:
Correct Option is : (A)
C6H5CHClC6H5

Topic: Chemistry, Haloalkanes and Haloarenes, NEET
Out of chain growth polymerisation and step growth polymerisation, in which type will you place the following?

Options:
A Step growth polymerisation
B Both Step growth and Chain growth polymerisation
C Neither Step growth nor Chain growth polymerisation
D Chain growth polymerisation

The correct answer is:
Chain growth polymerisation

Solution:
Correct Option is : (D)
Chain growth polymerisation

Topic: Chemistry, Polymers, NEET
Out of Cu2Cl2and CuCl2, which is more stable and why?

Options:
A Cu2Cl2is more stable because it has a higher coordination number.
B CuCl2is more stable because it has a higher electron density.
C CuCl2is more stable because it has a higher lattice energy.
D Cu2Cl2is more stable because it has a higher molar mass.

The correct answer is:
CuCl2is more stable because it has a higher electron density.

Solution:
Correct Option is : (B)
CuCl2is more stable because it has a higher electron density.

Topic: Chemistry, d and f Block Elements, NEET
Out of electron and proton, which one will have a higher velocity to produce matter waves of the same wavelength? Explain it.

Options:
A Electron
B Proton
C Both will have the same velocity.
D Cannot be determined.

The correct answer is:
Electron

Solution:
Correct Option is : (A)
Electron

Topic: Chemistry, Structure of Atom, NEET
Out of every 10 animals on earth, how many are insects?

Options:
A 7
B 5
C 3
D 10

The correct answer is:
7

Solution:
Out of every 10 animals on the planet, 7 are insects.

Topic: Biology, Biodiversity and its Conservation, NEET
Out of o-and p-dibromobenzene which one has a higher melting point and why?

Options:
A o-Dibromobenzene has a higher melting point because it has stronger van der waals forces.
B p-Dibromobenzene has a higher melting point because it has stronger dipole-dipole interactions.
C o-Dibromobenzene has a higher melting point because it can form hydrogen bonds.
D p-Dibromobenzene has a higher melting point than its o-isomer. It is due to the symmetry of the p-isomer which fits in the crystal lattice better than the o-isomer.

The correct answer is:
p-Dibromobenzene has a higher melting point than its o-isomer. It is due to the symmetry of the p-isomer which fits in the crystal lattice better than the o-isomer.

Solution:
Correct Option is : (D)
p-Dibromobenzene has a higher melting point than its o-isomer. It is due to the symmetry of the p-isomer which fits in the crystal lattice better than the o-isomer.

Topic: Chemistry, Haloalkanes and Haloarenes, NEET
Out of o-nitrophenol and o-cresol which is more acidic?

Options:
A o-Cresol is more acidic because it has a lower molecular weight than o-nitrophenol.
B o-nitrophenol is more acidic as the NO2group has an electron-withdrawing effect on phenol through resonance. So, it will stabilize the phenoxide ion formed on losing a proton whereas alkyl group (i.e. CH3) has an electron-donating effect, which destabilizes the phenoxide ion.
C o-Nitrophenol is more acidic because it has a lower molecular weight than o-cresol.
D o-Cresol is more acidic because it has a stronger electron-donating effect on the phenolic OH group compared to the nitro group in o-nitrophenol.

The correct answer is:
o-nitrophenol is more acidic as the NO2group has an electron-withdrawing effect on phenol through resonance. So, it will stabilize the phenoxide ion formed on losing a proton whereas alkyl group (i.e. CH3) has an electron-donating effect, which destabilizes the phenoxide ion.

Solution:
Correct Option is : (B)
o-nitrophenol is more acidic as the NO2group has an electron-withdrawing effect on phenol through resonance. So, it will stabilize the phenoxide ion formed on losing a proton whereas alkyl group (i.e. CH3) has an electron-donating effect, which destabilizes the phenoxide ion.

Topic: Chemistry, Alcohols Phenols and Ethers, NEET
Out of o-nitrophenol and p-nitrophenol, which is more volatile and why?

Options:
A o-Nitrophenol is more volatile because it forms intramolecular H bond whereas molecules of p-Nitrophenol get associated through intermolecular H bond
B p-Nitrophenol is more volatile because the nitro group is closer to the phenolic -OH group, enhancing hydrogen bonding.
C o-Nitrophenol is more volatile because it has a lower molecular weight than p-nitrophenol.
D p-Nitrophenol is more volatile because it has a lower molecular weight than o-nitrophenol.

The correct answer is:
o-Nitrophenol is more volatile because it forms intramolecular H bond whereas molecules of p-Nitrophenol get associated through intermolecular H bond

Solution:
Correct Option is : (A)
o-Nitrophenol is more volatile because it forms intramolecular H bond whereas molecules of p-Nitrophenol get associated through intermolecular H bond

Topic: Chemistry, Alcohols Phenols and Ethers, NEET
Out of the 12 pairs of ribs in rib cage of human, how many ribs are true and false, respectively?

Options:
A 7,Â 3
B 14, 6
C 7,Â 4
D 14,Â 4

The correct answer is:
14, 6

Solution:
Ribs are of 3 types:
1. True ribs (first 7 pairs): Dorsally attached to the thoracic vertebrae and ventrally connected to the sternum with the help of hyaline cartilage.
2. Vertebrochondral or False ribs (8th, 9th and 10th pairs): These ribs do not articulate directly with the sternum but join the 7th rib with the help of hyaline cartilage.
3. Floating ribs (11th and 12th pairs): These ribs are not connected ventrally.

Topic: Biology, Locomotion and Movement, NEET
Out of the following animals, how many show the oestrous cycle?

[Lizard, Lion, Goat, Rat, Human, Apes, Monkeys]

Options:
A Four
B Five
C Two
D Three

The correct answer is:
Three

Solution:
Lion, Goat and Rat show oestrous cycle. Lizard is oviparous. Human, Apes and Monkeys show menstrual cycle.

Topic: Biology, Reproduction in Organisms, NEET
Out of the following functions representing motion of a particle which represents SHM
I. $y=\sin \omega t-\cos \omega t$
II. $y=\sin ^3 \omega t$
III. $y=5 \cos \left(\frac{3 \pi}{4}-3 \omega t\right)$
IV. $y=1+\omega t+\omega^2 t^2$

Options:
A Only (IV) does not represent SHM
B (I) and (III)
C (I) and (II)
D Only (I)

The correct answer is:
(I) and (III)

Solution:
For a simple harmonic motion
$$
\frac{d^2 y}{d t^2} \propto-y
$$
Hence, equation $y=\sin \omega t-\cos \omega t$ and $y=5 \cos \left(\frac{3 \pi}{4}-3 \omega t\right)$ are satisfying this condition and equation $y=1+\omega t+\omega^2 t^2$ is not periodic and $y=\sin ^3 \omega t$ is periodic but not SHM.
Option (3) is correct

Topic: Physics, Oscillations, NEET, NEET 2011 (Screening)
Out of the following hormones, how many are secreted from adenohypophysis?

[Prolactin, ADH, GH, LH, Aldosterone, MSH, Melatonin, PTH]

Options:
A One
B Two
C Three
D Four

The correct answer is:
Four

Solution:
Hormones secreted from adenohypophysis - Prolactin, GH, LH and MSH.

Topic: Biology, Chemical Coordination and Integration, NEET
Out of the following hormones, how many are secreted from neurohypophysis?
[Aldosterone, MSH, Melatonin, Prolactin, ADH, TSH]

Options:
A One
B Two
C Three
D Four

The correct answer is:
One

Solution:
I. Adeno – hypophysis	A. Pars distalis (anterior pituitary)	1. Growth hormone (GH). 2. Prolactin (PRL). 3. Thyroid stimulating hormone (TSH). 4. Adrenocorticotrophic hormone (ACTH). 5. Luteinizing hormone (LH). 6. Follicle stimulating hormone (FSH).
B. Pars intermedia	Melanocyte stimulating hormone (MSH).
II. Neurohypophysis (Pars nervosa or Posterior pituitary)	1. Oxytocin. 2. Vasopressin (or ADH). - These hormones are actually synthesised by the hypothalamus and are transported to neurohypophysis via hypothalamic neurons.

Topic: Biology, Chemical Coordination and Integration, NEET
Out of the following options which one can be used to produce a propagating electromagnetic wave?

Options:
A A charge moving at constant velocity
B A stationary charge
C A chargeless particle
D An accelerating charge

The correct answer is:
An accelerating charge

Solution:
An accelerating charge can produce electromagnetic wave.

Topic: Physics, Electromagnetic Waves, NEET, NEET 2016 (Phase 1)
Out of the following redox reactions

I. NH4NO3âÎ N2O+2H2O

II. NH4NO2âÎN2+2H2O

III. PCl5âÎ PCl3+Cl2

disproportionation is not shown in

Options:
A I and II
B II and III
C I and III
D I, II and III

The correct answer is:
I, II and III

Solution:
I. NH 4 + NO 3 - → N 2 O + 2 H 2 O - 3 + 5 + 1
It is a redox reaction but not a disproportionation reaction. Since, different N-species are involved.
II. NH 4 + + NO 2 - → N 2 - 3 + 3 0
It is a redox reaction but it is comproportionation reaction. Since, different N-species are involved
III. PCl 5 → PCl 3 + Cl 2 + 5 - 1 + 3 - 1 0
Thus, it is also not a disproportionation reaction.

Topic: Chemistry, Redox Reactions, NEET
Out of the following structures,Identify allylic alcohols present.

Options:
A (i) and (ii)
B (iii) and (v)
C (i) and (iv)
D (ii) and (vi)

The correct answer is:
(ii) and (vi)

Solution:
Correct Option is : (D)
(ii) and (vi)

Topic: Chemistry, Alcohols Phenols and Ethers, NEET
Out of the following, the only correct statement about satellites is

Options:
A A satellite cannot move in a stable orbit in a plane passing through the earth's center
B Geostationary satellites are launched in the equatorial plane
C We can use just one geostationary satellite for global communication around the globe
D The speed of satellite increases with an increase in the radius of its orbit

The correct answer is:
Geostationary satellites are launched in the equatorial plane

Solution:
Orbital speed, v0=GMr; so speed of satellite decreases with the increase in the radius of its orbit. We need more than one satellite for global communication. For stable orbit, the plane of the satellite must through the center of earth. So, only (Geostationary satellites are launched in the equatorial plane) is correct.

Topic: Physics, Gravitation, NEET
Out of the following two coordination entities (i) cis-[CrCl2(ox)2]3–and (ii) trans-[CrCl2(ox)2]3–Which is chiral (optically active)?

Options:
A (i) cis-[CrCl2(ox)2]3–is chiral
B (ii) trans-[CrCl2(ox)2]3–is chiral
C Both of (i) and (ii) are chiral
D None of them are chiral

The correct answer is:
(i) cis-[CrCl2(ox)2]3–is chiral

Solution:
Correct Option is : (A)
(i) cis-[CrCl2(ox)2]3–is chiral

Topic: Chemistry, Coordination Compounds, NEET
Out of the following, which is an example of convergent evolution?

(i) Eyes of octopus and mammals
(ii) Flippers of penguins and Dolphins
(iii) Sweet potato and potato

Options:
A i and iii
B i and ii
C ii and iii
D i, ii and iii

The correct answer is:
i, ii and iii

Solution:
Convergent evolution is the process by which species of non-related animals evolve in a similar fashion.
Eyes of octopus and mammals: both have complex camera-like eyes which helps in sight.
Flippers of penguins and dolphins: both have flippers which are designed for swimming in the water, despite the fact that penguins evolved from birds with the ability to fly and dolphins from mammals that walked on land.
Sweet potato and potato: Tubers of both sweet potato and potato perform the same function of food storage and vegetative propagation despite sweet potato is a root modification while potato is a stem modification.

Topic: Biology, Evolution, NEET
Out of the following which one is a forward biased diode?

Options:
A
B
C
D

The correct answer is:

Solution:
The circuit is forward bias if a p-type semiconductor is connected with higher potential and n-type connected with lower potential in the above options,
(1)
reverse bias,
(2)
reverse bias,
(3)
reverse bias,
(4)
forward bias.

Topic: Physics, Semiconductors, NEET, NEET 2020 (Phase 2)
Out of the total energy received by herbivores from producers, how much is passed to carnivores?

Options:
A 5%
B 10%
C 25%
D 50%

The correct answer is:
10%

Solution:
According to the 10% law given by Raymond Lindeman, at each trophic level, only10% of the energy received is transferred to the next trophic level.

Topic: Biology, Ecosystem, NEET
Out of these the correct match is

Options:
A Bayer’s method — Na2CO3
B Matte — 98% Cu2S+2%FeS
C van Arkel method — Agl
D Thomas slag — Raw material for cement industry

The correct answer is:
Matte — 98% Cu2S+2%FeS

Solution:
Roasted mass obtained from roasting step is called matte. (98% Cu2S+2%FeS )
Rest other all are incorrect.

Topic: Chemistry, General Principles and Processes of Isolation of Metals, NEET
Out of $\mathrm{TiF}_6^{2-}, \mathrm{CoF}_6^{3-}, \mathrm{Cu}_2 \mathrm{Cl}_2$ and $\mathrm{NiCl}_4^{2-}$ ( $\mathrm{Z}$ of $\mathrm{Ti}=22, \mathrm{Co}=27, \mathrm{Cu}=29, \mathrm{Ni}=28$ ) the colourless species are

Options:
A $\mathrm{TiF}_6^{2-}$ and $\mathrm{CoF}_6^{3-}$
B $\mathrm{Cu}_2 \mathrm{Cl}_2$ and $\mathrm{NiCl}_4^{2-}$
C $\mathrm{TiF}_6^{2-}$ and $\mathrm{Cu}_2 \mathrm{Cl}_2$
D $\mathrm{CoF}_6^{3-}$ and $\mathrm{NiCl}_4^{2-}$

The correct answer is:
$\mathrm{TiF}_6^{2-}$ and $\mathrm{Cu}_2 \mathrm{Cl}_2$

Solution:
Key Idea Species without unpaired electrons are colourless because transition of electron is not passible.
(a) In $\mathrm{TiF}_6^{2-}, \mathrm{Ti}$ is present as $\mathrm{Ti}^{4+}$.
$$
\mathrm{Ti}^{4+}=[\mathrm{Ar}] 3 \mathrm{~d}^0 4 \mathrm{~s}^0
$$
Hence, $\mathrm{TiF}_6^{2-}$ is colourless.
(b) In $\mathrm{CoF}_6^{3-}$, Co is present as $\mathrm{Co}^{3+}$
Due to presence of unpaired electrons, $\mathrm{CoF}_6^{3-}$ is coloured.
(c) In $\mathrm{Cu}_2 \mathrm{Cl}_2, \mathrm{Cu}$ is present as $\mathrm{Cu}^{+}$.
Due to absence of unpaired electron, $\mathrm{Cu}_2 \mathrm{Cl}_2$ is colourless.
(d) In $\mathrm{NiCl}_4^{2-}, \mathrm{Ni}$ is present as $\mathrm{Ni}^{2+}$.
Since, unpaired electrons are present, $\mathrm{NiCl}_4^{2-}$ is coloured.
Hence, $\mathrm{TiF}_6^{2-}$ and $\mathrm{Cu}_2 \mathrm{Cl}_2$ are colourless species.

Topic: Chemistry, d and f Block Elements, NEET, NEET 2009 (Screening)