datavorous/entrance-exam-dataset huggingface dataset:
A person suffering from severe chills and recurring high fever for 3-4 days was diagnosed with malaria. The causative agent is responsible for the secretion of a toxic substance, which ruptures RBCs. This substance is called

Options:
A sporozoites
B haematopoetin
C haem-protease
D haemozoin

The correct answer is:
haemozoin

Solution:
Plasmodium enters the human body as sporozoites (infectious form) through the bite of infected female Anopheles mosquito. The parasites initially multiply within the liver cells and then attack the red blood cells (RBCs) resulting in their rupture. The rupture of RBCs is associated with the release of a toxic substance, haemozoin, which is responsible for the chill and high fever recurring every three to four days.

Topic: Biology, Human Health and Diseases, NEET
A person suffers from a disease in which a slowly developing chronic inflammation of the organs is observed. The pathogen is known to live in the lymphatic vessels of the lower limbs. They also form gross deformities and affects the genital organs. Which of the following organisms is the vector for this disease?

Options:
A Anopheles
B Wuchereria
C Ascaris
D Culex

The correct answer is:
Culex

Solution:
Wuchereria (W. bancrofti and W. malayi), the filarial worms cause a slowly developing chronic inflammation of the organs in which they live for many years, usually the lymphatic vessels of the lower limbs and the disease is called elephantiasis or filariasis. The genital organs are also often affected, resulting in gross deformities. The pathogens are transmitted to a healthy person through the bite by the female mosquito vectors. Culex is the most common mosquito to spread the disease.

Topic: Biology, Human Health and Diseases, NEET
A person suffers punctures in his chest cavity in an accident without any damage to the lungs. Its effect could be

Options:
A Reduced breathing rate
B Rapid increase in breathing rate
C No change in respiration
D Cessation of breathing

The correct answer is:
Cessation of breathing

Solution:
Due to Cessation of breathing, a person can suffer punctures in his chest cavity.

Topic: Biology, Breathing and Exchange of Gases, NEET
A person travelling in a straight line moves with a constant velocity $\mathrm{v}_1$ for certain distance ' $\mathrm{x}$ ' and with a constant velocity $\mathrm{v}_2$ for next equal distance. The average velocity $v$ is given by the relation

Options:
A $\frac{1}{v}=\frac{1}{v_1}+\frac{1}{v_2}$
B $\frac{2}{v}=\frac{1}{v_1}+\frac{1}{v_2}$
C $\frac{v}{2}=\frac{v_1+v_2}{2}$
D $v=\sqrt{v_1 V_2}$

The correct answer is:
$\frac{2}{v}=\frac{1}{v_1}+\frac{1}{v_2}$

Solution:
For distance $x$, the person moves with constant velocity $\mathrm{v}_1$ and for another $\mathrm{x}$ distance, he moves with constant velocity of $\mathrm{v}_2$, then Total distance travelled, $\mathrm{D}=\mathrm{x}+\mathrm{x}=2 \mathrm{x}$ Total time-taken, $\mathrm{T}=\mathrm{t}_1+\mathrm{t}_2$
$$
=\frac{\mathrm{x}}{\mathrm{v}_1}+\frac{\mathrm{x}}{\mathrm{v}_2} \quad\left[\because \mathrm{t}=\frac{\text { Distance }}{\text { Velocity }}\right]
$$
The average velocity, $\mathrm{V}_{\mathrm{av}}=\frac{\text { total distance }}{\text { total time }}=\frac{\mathrm{D}}{\mathrm{T}}$
$$
\begin{aligned}
\mathrm{v} & =\frac{2 \mathrm{x}}{\frac{\mathrm{x}}{\mathrm{v}_1}+\frac{\mathrm{x}}{\mathrm{v}_2}}=\frac{2}{\frac{\mathrm{l}}{\mathrm{v}_1}+\frac{\mathrm{l}}{\mathrm{v}_2}} \quad\left[\because \mathrm{v}_{\mathrm{av}}=\mathrm{v}\right] \\
\Rightarrow \frac{1}{\mathrm{v}_1}+\frac{\mathrm{l}}{\mathrm{v}_2} & =\frac{2}{\mathrm{v}}
\end{aligned}
$$

Topic: Physics, Motion In One Dimension, NEET, NEET 2019 (Odisha)
A person trying to lose weight (dieter) lifts a 10 kg mass, one thousand times, to a height of 0.5 m each time. Assume that the potential energy lost each time she lowers the mass is dissipated. How much work does she do against the gravitational force ?

Options:
A 50000J
B 98000J
C 49000J
D 98000J

The correct answer is:
49000J

Solution:
Correct Option is : (C)
49000J

Topic: Chemistry, Work Power Energy, NEET
A person wanted to create a lawn for his home garden, so he planted grass all over the area. He observed that many other weeds also growing in the garden. To remove that weed what weedicide he should use?

Options:
A Gibberellic acid
B Ethylene
C IBA
D 2, 4 - D

The correct answer is:
2, 4 - D

Solution:
2, 4-D, (2, 4-Dichlorophenoxyacetic acid) is an auxin which is widely used to kill dicotyledonous weeds, does not affect mature monocotyledonous plants. It is used to prepare weed-free lawns by gardeners

Topic: Biology, Plant - Growth and Development, NEET
A person was advised to do urine tests and a blood tests for glucose. Glucose was detected in his urine. He was not taking any medications. Which of the following values will correspond to the amount of glucose in the blood of a person?

Options:
A 200 mg of glucose per 100 ml of blood
B 140 mg of glucose per 100 ml of blood
C 120 mg of glucose per 100 ml of blood
D 100 mg of glucose per 100 ml of blood

The correct answer is:
200 mg of glucose per 100 ml of blood

Solution:
The renal threshold of glucose is 160–180 mg per 100 ml of blood. If the blood values of glucose are below this level, the kidneys will absorb all the glucose from the filtrate. If it rises beyond this value, glucose appears in urine.

Topic: Biology, Excretory Products and their Elimination, NEET
A person was using water supplied by the Municipality. Due to shortage of water he started using underground water. He felt a laxative effect. What could be the cause?

Options:
A The underground water contains a higher concentration of sulfates, leading to a laxative effect.
B The underground water is contaminated with industrial pollutants, causing gastrointestinal issues.
C The underground water is colder than municipal water, which can stimulate the digestive system.
D The underground water has a lower pH level, which irritates the digestive tract.

The correct answer is:
The underground water contains a higher concentration of sulfates, leading to a laxative effect.

Solution:
Correct Option is : (A)
The underground water contains a higher concentration of sulfates, leading to a laxative effect.

Topic: Chemistry, Environmental Chemistry, NEET
A person who is on a long hunger strike and is surviving only on water, will have:

Options:
A less amino acids in his urine
B more glucose in his blood
C less urea in his urine
D more sodium in his urine.

The correct answer is:
less urea in his urine

Solution:
Due to a long hunger strike and survivalon water, a person will have less urea in hisurine because urea comes to kidney as a waste product from liver which is formed after the breakdown of protein fat, carbohydrate during hunger. It is not synthesized but the synthesized ones are catabolised.
Related Theory
$\rightarrow$ The normal concentration of sodium in the blood plasma is $150 \mathrm{mEq} / \mathrm{L}$. Excess water
intake will cause excess urination. Because nutritional Nais absent on account of hunger, the amount of $\mathrm{Na}$ in the blood will decrease.

Topic: Biology, Excretory Products and their Elimination, NEET, NEET 2007
A person with blood group $\mathrm{ARh}^{-}$can receive the blood transfusion from which of the following types?
A. $\mathrm{BRh}^{-}$
B. $\mathrm{ABRh}^{-}$
C. $\mathrm{ORh}^{-}$
D. $\mathrm{ARh}^{-}$
E. $\mathrm{ARh}^{*}$
Choose the correct answer from the options given below :

Options:
A D and E only
B D only
C A and B only
D C and D only

The correct answer is:
C and D only

Solution:
The correct answer is option (4) because recipient is A blood group with $\mathrm{Rh}(-\mathrm{ve})$ antigen, hence cannot receive blood from any blood group with $\mathrm{Rh}(+\mathrm{ve}$ ) antigen and as A blood group individuals have anti-B antibodies in plasma. So, donor could be $\mathrm{O}(\mathrm{Rh}-\mathrm{ve}$ ) and $\mathrm{A}(\mathrm{Rh}-\mathrm{ve}$ ) only.
Options (1), (2) and (3) are not correct answers because $\mathrm{B}^{-}, \mathrm{AB}^{-}$and $\mathrm{A}^{+}$blood groups will lead to serve clumping reaction.

Topic: Biology, Body Fluids and Circulation, NEET, NEET 2024 (Re-NEET)
A person with chronic kidney failure will have

Options:
A high blood urea and high serum creatinine levels
B high blood urea and low serum creatinine levels
C low blood urea and high serum creatinine levels
D low blood urea and low serum creatinine levels

The correct answer is:
high blood urea and high serum creatinine levels

Solution:
In chronic kidney failure, the kidneys are not functioning properly. This results in a rise in urea levels in the blood as kidneys are not able to remove urea. Creatinine is a waste product that is produced by muscles due to the breakdown of creatine. This is then removed from kidneys through urine. Due to chronic failure the creatinine gets accumulated and thus amount increases in the blood.

Topic: Biology, Excretory Products and their Elimination, NEET
A person with folic acid deficiency will have erythrocytes which are

Options:
A immature and larger than normal erythrocytes
B immature and smaller than normal erythrocytes
C mature and larger than normal erythrocytes
D mature and smaller than normal erythrocytes

The correct answer is:
immature and larger than normal erythrocytes

Solution:
Due to folic acid deficiency, thymidine synthase function is impaired due to which DNA synthesis is affected. This disrupts erythropoiesis due to which hemoglobin synthesis increases and this results in enlarged and immature RBC's. Hence this is known as megaloblastic anemia.

Topic: Biology, Digestion and Absorption, NEET
A person with unknown blood group under $A B O$ system, has suffered much blood loss in an accident and needs immediate blood transfusion. His one friend who has a valid certificate of his own blood type, offers for blood donation without delay. What would have been the type of blood group of the donor friend?

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

The correct answer is:
Type $\mathrm{O}$

Solution:
Blood type ' $\mathrm{O}$ ' has no any antigen but both types of antibodies ' $a$ ' and ' $\mathrm{b}$ '. The person with blood type ' $O$ ' is universal donor.

Topic: Biology, Principles of Inheritance and Variation, NEET, NEET 2011 (Screening)
A person, working in a spinning mill for several years is now experiencing difficulty in breathing. Which of the following can be the reason for the problem assuming that this is a work-related problem?

Options:
A Emphysema
B Influenza
C Coryza
D Fibrosis of upper part of lung

The correct answer is:
Fibrosis of upper part of lung

Solution:
Due to repeated injuries to the internal tissue caused by the inhalation of dust in the mill results in development of scar tissue. This scar tissue formation is known as fibrosis. In it, the damaged cells/ tissue get replaced by connective tissue and if unchecked leads to formation of permanent scar tissue. This causes breathing problems and respiratory disorders as the tissue loses flexibility.

Topic: Biology, Breathing and Exchange of Gases, NEET
A person works in a silicon manufacturing industry for the past 20 years. Since a few years he has started feeling quite breathless and has cough all the time. His doctor says that this is because of his occupation as he is exposed constantly to silica dust. What must have been the size of the particles to cause such an issue?

Options:
A PM 3.5
B PM 2.75
C PM 5
D PM 2.5

The correct answer is:
PM 2.5

Solution:
As stated by Central Pollution Control Board (CPCB), particulate size 2.5 micrometers or less in diameter (PM 2.5) cause greatest injury to health of humans. These particles when inhaled cause multiple respiratory problems such as breathing problems, inflammation and irritation, damage to the lungs resulting in premature deaths. Particulates of such a small size cannot be removed by electrostatic precipitator also.

Topic: Biology, Environmental Issues, NEET
A phosphoglyceride is always made up of

Options:
A only a saturated fatty acid esterified to a glycerol molecule to which a phosphate group is also attached
B only an unsaturated fatty acid esterified to a glycerol molecule to which a phosphate group is also attached
C a saturated or unsaturated fatty acid esterified to a glycerol molecule to which a phosphate group is also attached
D a saturated or unsaturated fatty acid esterified to a phosphate group, which is also attached to a glycerol molecule

The correct answer is:
a saturated or unsaturated fatty acid esterified to a glycerol molecule to which a phosphate group is also attached

Solution:
A fat is formed of two kinds of smaller molecules, i.e., glycerol and fatty acids. In making a fat three fatty acid molecules each jain to glycerol by an ester linkage. A fatty acid has a long carbon skeleton, usually 16 or 18 carbon atoms in length. It there are no double bonds between carbon atoms composing the chain, then as many hydrogen atoms as possible are bonded to the carbon skeleton.
This is called saturated fatty acid. Unsaturated fatty acid has one or more double bonds. Phosphoglycerides are esters of two fatty acids, phosphoric acid and a trifunctional alcohal glycerol. The fatty acids are attached to the glycerol at the 1 and 2 position an glycerol through ester bonds.

Topic: Biology, Biomolecules (B), NEET, NEET 2013 (All India)
A photocell employs photoelectric effect to convert:

Options:
A change in the frequency of light into a change in the electric current
B change in the frequency of light into a change in electric voltage
C change in the intensity of illumination into a change in photoelectric current
D change in the intensity of illumination into a change in the work function of the photocathode

The correct answer is:
change in the intensity of illumination into a change in photoelectric current

Solution:
Photocell employs photoelectric effect to convert change in the intensity of illumination into a charge in photoelectric current.

Topic: Physics, Dual Nature of Matter, NEET, NEET 2006
A photo-cell is being operated in saturation mode. Electromagnetic radiations of wavelength Î» m fall upon the photo-cell. The corresponding spectral sensitivity of photocell is J A W-1. The number of photo-electrons produced by each incident photon, is

Options:
A hc2eλJ
B hcJeλ
C 2hcJeλ
D 2hceλJ

The correct answer is:
hcJeλ

Solution:
Power of source P=nâhcÎ» ...(i)
n â no. of incident photons per second
Photo current I = n'e ...(ii)
n' â no. of electrons reaching anode per second
â n'n=IeÃhcPÎ»=hceâÎ»IP=hcJeÎ»

Topic: Physics, Dual Nature of Matter, NEET
A photocell is illuminated by a small bright source placed 1 m away. When the same source of light is placed 12m away, the number of electrons emitted by photocathode would

Options:
A increase by a factor of 2
B decrease by a factor of 2
C increase by a factor of 4
D decrease by a factor of 4

The correct answer is:
increase by a factor of 4

Solution:
n∝I∝1r2
⇒ n2n1=r1r22=1122=4
⇒ n2=4n1

Topic: Physics, Dual Nature of Matter, NEET
A photocell is receiving light from a source placed at a distance of 1 m. If the same source is to be placed at a distance of 2 m, then the ejected electrons

Options:
A moves with one-fourth energy as that of the initial energy.
B moves with one-fourth of momentum as that of the initial momentum.
C will be half in number.
D will be one-fourth in number.

The correct answer is:
will be one-fourth in number.

Solution:
Number of ejected electrons ∝ Intensity ∝ 1 Distance 2
Therefore an increment of distance two times will reduce the number of ejected electrons to 14th of the previous one.

Topic: Physics, Dual Nature of Matter, NEET
A photoelectric cell is illuminated by a point source of light $1 \mathrm{~m}$ away. When the source is shifted to $2 \mathrm{~m}$ then:

Options:
A each emitted electron carries one quarter of the initial energy
B number of electrons emitted in half the initial number
C each emitted electron carries half the initial energy
D number of electrons emitted is a quarter of the initial number

The correct answer is:
number of electrons emitted is a quarter of the initial number

Solution:
For a point source $\mathrm{I} \propto \frac{1}{r^2}$

Topic: Physics, Dual Nature of Matter, NEET, NEET 2003
A photoelectric cell is illuminated by a point source of light 1 m away. When the source is shifted to 2 m then

Options:
A Each emitted electron carries half the initial energy
B Number of electrons emitted is a quarter of the initial number
C Each emitted electron carries one quarter of the initial energy
D Number of electrons emitted is half the initial number

The correct answer is:
Number of electrons emitted is a quarter of the initial number

Solution:
Intensity of light source is
I∝1d2
When distance is doubled, intensity becomes one-fourth.
As number of photoelectrons ∝ intensity, so number of photoelectrons is quarter of the initial number.

Topic: Physics, Wave Optics, NEET
A photoelectric experiment is performed at two different light intensities I1 and I2 I2>I1. Choose the correct graph showing the variation of stopping potential versus frequency of light.

Options:
A
B
C
D None of these

The correct answer is:
None of these

Solution:
The value of stopping potential depends on the maximum kinetic energy of the photo-electron and thus it is independent of the intensity of light. Therefore, none of the graph shown is correct. The correct graph is shown in the figure.

Topic: Physics, Dual Nature of Matter, NEET
A photoelectric material having work-function Ï0 is illuminated with a light of wavelength Î» Î»<hcÏ0. The fastest photoelectron has a de Broglie wavelength Î»d. A change in wavelength of the incident light by ÎÎ» results in a change ÎÎ»d in Î»d. The ratio ÎÎ»dÎÎ» is proportional to

Options:
A λd3λ2
B λd3λ
C λd2λ2
D λdλ

The correct answer is:
λd3λ2

Solution:
According to the equation of photoelectric effect,

KEmax=hcÎ»- Ï0

p22m=hcÎ»-Ï0

hÎ»d22m=hcÎ»-Ï0

Assuming small changes, differentiating both sides,

h22m-2dÎ»dÎ»d3= -hcÎ»2 dÎ»

dÎ»ddÎ» âÎ»d3Î»2

Topic: Physics, Dual Nature of Matter, NEET
A photoelectric surface is illuminated successively by monochromatic light of wavelength λ and λ2. If the maximum kinetic energy of the emitted photoelectrons in the second case is 3 times that in the first case, the work function of the surface of the material is:
( h = Planck's constant, c = speed of light)

Options:
A hcλ
B 2hcλ
C hc3λ
D hc2λ

The correct answer is:
hc2λ

Solution:
k1=hcλ- ψ
k2=3k1=2hcλ-ψ=3hcλ-3ψ
So 2 ψ=hcλ So ψ=hc2λ

Topic: Physics, Dual Nature of Matter, NEET, NEET 2015 (Phase 2)
A photon and an electron have equal energy E, then the ratio Î»photonÎ»electron is proportional to

Options:
A E
B 1E
C 1E
D does not depend upon E

The correct answer is:
1E

Solution:
λphoton=hcE
λelectron=h2mE
⇒λphotonλelectron=c2mE
λphotonλelectron∝1E

Topic: Physics, Dual Nature of Matter, NEET
A photon collides with a stationary hydrogen atom in ground state inelastically. The energy of the colliding photon is 10.2 eV. After a time interval of the order of a microsecond, another photon collides with the same hydrogen atom inelastically with an energy of 15 eV. What will be observed by the detector?

Options:
A 2 photons of energy 10.2 eV
B 2 photons of energy 1.4 eV
C One photon of energy 10.2 eV and an electron of energy 1.4 eV
D One photon of energy 10.2 eV and another photon of energy 1.4 eV

The correct answer is:
One photon of energy 10.2 eV and an electron of energy 1.4 eV

Solution:
The first photon will excite the hydrogen atom (in ground state) to first excited state (as E2-E1=10.2 eV). Hence, during de-excitation a photon of 10.2 eV will be released.

The second photon of energy 15 eV can ionise the atom. Hence the balance energy i. e., 15-13.6 eV=1.4 eV is retained by the electron. Therefore, by the second photon an electron of energy 1.4 eV will be released.

Topic: Physics, Atomic Physics, NEET
A photon of energy 10.2 eV collides inelastically with a stationary hydrogen atom in the ground state. After a time interval of the order of a microsecond, another photon collides with energy of 15 eV. What will be observed by the detector?

Options:
A one photon of energy 10.2eV and an electron having energy 1.4 eV
B two photons of energy 1.4 eV
C two photons of energy 10.2 eV
D One photon of energy 10.2 eVand another photon of 1.4 eV

The correct answer is:
one photon of energy 10.2eV and an electron having energy 1.4 eV

Solution:
In the time of 1μs first photon is emitted, due to second photon incident ionization of atom takes from ground state ( Like photo electric effect)

Topic: Physics, Atomic Physics, NEET
A photon of energy 15 eV collides with H-atom. Due to this collision, H-atom gets ionized. The maximum kinetic energy of the emitted electron is

Options:
A 1.4 eV
B 5 eV
C 15 eV
D 13.6 eV

The correct answer is:
1.4 eV

Solution:
Energy of photon = ionization energy +KEmax
â´KEmax=15 eV-13.6 eV=1.4 eV

Topic: Physics, Atomic Physics, NEET
A photon of hard gamma radiation knocks a proton out of 1 2 2 4 Mg nucleus to form

Options:
A The isotope of parent nucleus
B The isobar of parent nucleus
C The nuclide 1 1 2 3 Na
D The isobar of 1 1 2 3 Na

The correct answer is:
The nuclide 1 1 2 3 Na

Solution:
​ 12 24 Mg+γ→ ​ 11 Na 23 + ​ 1 1 P

Topic: Chemistry, Chemical Kinetics, NEET
A photon of light enters a block of glass after travelling through a vacuum. The energy of the photon on entering the glass block

Options:
A Increases because its associated wavelength decreases
B Decreases because the speed of the radiation decreases
C Stays the same because the speed of the radiation and the associated wavelength do not change
D Stays the same because the frequency of the radiation does not change

The correct answer is:
Stays the same because the frequency of the radiation does not change

Solution:
Frequency of light does not change with medium and energy of a photon is given by E=hν

Topic: Physics, Dual Nature of Matter, NEET
A photon of light enters a block of glass after travelling through vacuum. The energy of the photon on entering the glass block

Options:
A Increases because its associated wavelength decreases
B Decreases because the speed of the radiation decreases
C Stays the same because the speed of the radiation and the associated wavelength do not change
D Stays the same because the frequency of the radiation does not change

The correct answer is:
Stays the same because the frequency of the radiation does not change

Solution:
Frequency of light does not change with medium and energy of photon is given by E = h υ

Topic: Physics, Dual Nature of Matter, NEET
A γ photon of momentum P is emitted by a radioactive nucleus of mass M. The total energy released in this process will be (Assume nuclei is free to recoil) [c is the speed of light]

Options:
A Pc
B P22M
C Pc+P2M
D Pc+P4M

The correct answer is:
Pc+P2M

Solution:
The momentum of the atom due to recoil =P22M
E=Pc+P22 M

Topic: Physics, Nuclear Physics, NEET
A photon of wavelength 4 × 10–7m strikes on metal surface, the work function of the metal being 2.13 eV. Calculate the energy of the photon (in eV).

Options:
A 3.10 eV
B 3.68 eV
C 4.52 eV
D 2.87 eV

The correct answer is:
3.10 eV

Solution:
Correct Option is : (A)
3.10 eV

Topic: Chemistry, Structure of Atom, NEET
A photon of wavelength 4 × 10–7m strikes on metal surface, the work function of the metal being 2.13 eV. Calculate the kinetic energy of the emission.

Options:
A 1.45 eV
B 0.97 eV
C 2.85 eV
D 2.24 eV

The correct answer is:
0.97 eV

Solution:
Correct Option is : (B)
0.97 eV

Topic: Chemistry, Structure of Atom, NEET
A photon of wavelength 4 × 10–7m strikes on metal surface, the work function of the metal being 2.13 eV. Calculate the velocity of the photoelectron

Options:
A 3.66 × 105ms–1
B 4.25 × 105ms–1
C 6.54 × 105ms–1
D 5.84 × 105ms–1

The correct answer is:
5.84 × 105ms–1

Solution:
Correct Option is : (D)
5.84 × 105ms–1

Topic: Chemistry, Structure of Atom, NEET
A photon will have less energy if its

Options:
A amplitude is higher
B frequency is higher
C wavelength is longer
D wavelength is shorter

The correct answer is:
wavelength is longer

Solution:
The energy of a photon E=hcÎ», E is less if Î» is longer

Topic: Physics, Dual Nature of Matter, NEET