datavorous/entrance-exam-dataset huggingface dataset:
When did protein-energy malnutrition (PEM) occur in Ethiopia?

Options:
A During a famine in the mid-nineties
B During a natural disaster in the late seventies
C During the liberation war
D During a severe drought in the mid-eighties

The correct answer is:
During a severe drought in the mid-eighties

Solution:
PEM happened in Ethiopia during the severe drought in the mid-eighties.

Topic: Biology, Digestion and Absorption, NEET
When did the Air (Prevention and Control of Pollution) Act come into force in India?

Options:
A 1981
B 1986
C 1987
D 1989

The correct answer is:
1981

Solution:
The Air (Prevention and Control of Pollution) Act came into force in India in 1981.

Topic: Biology, Environmental Issues, NEET
When did the first cellular form of life possibly originate?

Options:
A 1000 million years ago
B 1500 million years ago
C 2000 million years ago
D 2500 million years ago

The correct answer is:
2000 million years ago

Solution:
The first cellular form of life did not possibly originate till about 2000 million years ago.

Topic: Biology, Evolution, NEET
When did the first cellular forms of life appear on Earth?

Options:
A 2000 million years ago
B 1000 million years ago
C 500 million years ago
D 100 million years ago

The correct answer is:
2000 million years ago

Solution:
The first cellular forms of life appeared on Earth about 2000 million years ago.

Topic: Biology, Evolution, NEET
When did the jawless fish probably evolve?

Options:
A 500 million years ago
B 350 million years ago
C 320 million years ago
D 250 million years ago

The correct answer is:
350 million years ago

Solution:
Jawless fish probably evolved around 350 million years ago.

Topic: Biology, Evolution, NEET
When dihydroxy acetone reacts with HIO4 , the product is/are

Options:
A HCHO
B HCHO and HCOOH
C HCHO and CO2
D CHOOH

The correct answer is:
HCHO and CO2

Solution:

Topic: Chemistry, Aldehydes and Ketones, NEET
When do large volumes of gases get exchanged in plants?

Options:
A During photosynthesis
B During respiration
C During transport of gases
D During high demands for gas exchange

The correct answer is:
During photosynthesis

Solution:
Large volumes of gases get exchanged in plants during photosynthesis.

Topic: Biology, Respiration in Plants, NEET
When do micelles, or associated colloids, form?

Options:
A Below the Kraft temperature
B Above the Kraft temperature
C At any temperature
D At the Kraft temperature

The correct answer is:
Above the Kraft temperature

Solution:
Micelles, or associated colloids, form above a particular temperature called the Kraft temperature (Tk).

Topic: Chemistry, Surface Chemistry, NEET
When do real gases exhibit ideal behavior?

Options:
A At very high temperatures
B At very low pressures
C At intermediate pressures
D At high temperatures

The correct answer is:
At very low pressures

Solution:
Real gases exhibit ideal behavior at very low pressures, where the volume of gas molecules can be neglected.

Topic: Chemistry, States of Matter, NEET
When do real gases follow Boyle's, Charles', and Avogadro's laws?

Options:
A Only at extremely high temperatures
B Only at very low pressures
C Only under specific conditions when intermolecular forces are negligible
D Only when the gas is in a gaseous state

The correct answer is:
Only under specific conditions when intermolecular forces are negligible

Solution:
Real gases follow Boyle's, Charles', and Avogadro's laws only under specific conditions when the forces of interaction (intermolecular forces) are practically negligible.

Topic: Chemistry, States of Matter, NEET
When do repulsive forces between gas molecules become significant?

Options:
A At low pressures
B At high temperatures
C At low temperatures
D At high pressures

The correct answer is:
At high pressures

Solution:
Repulsive forces between gas molecules become significant at high pressures.

Topic: Chemistry, States of Matter, NEET
When do the centromeres divide during mitosis?

Options:
A Prophase
B Anaphase
C Metaphase
D Telophase

The correct answer is:
Anaphase

Solution:
During anaphase, the centromeres divide and the chromatids start moving towards the two opposite poles.

Topic: Biology, Cell Cycle and Cell Division, NEET
When do the melting points of transition metals rise to a maximum in a row?

Options:
A At the beginning of each series
B At the end of each series
C At d5 configuration
D As the atomic number increases

The correct answer is:
At d5 configuration

Solution:
In any row, the melting points of these metals rise to a maximum at d5 except for anomalous values of Mn and Tc.

Topic: Chemistry, d and f Block Elements, NEET
When do the microtubules from opposite poles of the spindle get attached to the kinetochores in meiosis II?

Options:
A During Interkinesis
B During Prophase I
C During Metaphase I
D During Metaphase II

The correct answer is:
During Metaphase II

Solution:
At Metaphase II stage the chromosomes align at the equator and the microtubules from opposite poles of the spindle get attached to the kinetochores of sister chromatids in meiosis II.

Topic: Biology, Cell Cycle and Cell Division, NEET
When does a reaction proceed with retention of the configuration?

Options:
A When all bonds to the stereocentre are broken.
B When no bond to the stereocentre is broken.
C When the reactant loses its configuration.
D When the product has a different configuration from the reactant.

The correct answer is:
When no bond to the stereocentre is broken.

Solution:
A reaction proceeds with retention of the configuration when no bond to the stereocentre is broken.

Topic: Chemistry, Haloalkanes and Haloarenes, NEET
When does behavior similar to that of the lanthanoids become evident in the actinoid series?

Options:
A In the first half of the actinoid series
B In the second half of the actinoid series
C In the middle of the actinoid series
D In the last quarter of the actinoid series

The correct answer is:
In the second half of the actinoid series

Solution:
A comparison of the actinoids with the lanthanoids, with respect to different characteristics reveals that behaviour similar to that of the lanthanoids is not evident until the second half of the actinoid series.

Topic: Chemistry, d and f Block Elements, NEET
When does boiling occur in a liquid?

Options:
A When the liquid becomes denser.
B When the vapor pressure of the liquid equals the external pressure.
C When the liquid turns into a solid.
D When the liquid expands freely into the surroundings.

The correct answer is:
When the vapor pressure of the liquid equals the external pressure.

Solution:
Boiling occurs when the vapor pressure of the liquid becomes equal to the external pressure.

Topic: Chemistry, States of Matter, NEET
When does DNA synthesis occur during the cell cycle?

Options:
A At the beginning of the cell cycle
B At the end of the cell cycle
C Throughout the cell cycle
D Only at a specific stage of the cell cycle

The correct answer is:
Only at a specific stage of the cell cycle

Solution:
DNA synthesis occurs only during one specific stage in the cell cycle.

Topic: Biology, Cell Cycle and Cell Division, NEET
When does equilibrium occur in the sublimation of solid iodine?

Options:
A When the vessel is completely empty.
B When the intensity of color becomes constant.
C When the vessel explodes.
D When the vapor condenses to form solid iodine.

The correct answer is:
When the intensity of color becomes constant.

Solution:
Equilibrium is attained when the intensity of color becomes constant in the vessel during the sublimation of solid iodine.

Topic: Chemistry, Chemical Equilibrium, NEET
When does fertilisation occur?

Options:
A When the ovum is released by the ovary
B When a sperm enters into the cytoplasm of the ovum
C When the ovum and sperms are transported simultaneously to the ampullary region
D When the secretions of the acrosome help the sperm enter into the cytoplasm of the ovum

The correct answer is:
When the ovum and sperms are transported simultaneously to the ampullary region

Solution:
Fertilisation can only occur if the ovum and sperms are transported simultaneously to the ampullary region.

Topic: Biology, Human Reproduction, NEET
When does light behave as a wave?

Options:
A When it interacts with matter
B When it exhibits interference and diffraction
C When it propagates
D When it possesses high energy

The correct answer is:
When it exhibits interference and diffraction

Solution:
light behaves as a wave when it exhibits interference and diffraction.

Topic: Chemistry, Structure of Atom, NEET
When does radiation get emitted or absorbed in Bohr's model of the hydrogen atom?

Options:
A Radiation is emitted continuously as the electron moves in its orbit.
B Radiation is emitted or absorbed only when the electron changes its orbit.
C Radiation is emitted or absorbed only when the electron's velocity changes.
D Radiation is emitted or absorbed only when the electron's mass changes.

The correct answer is:
Radiation is emitted or absorbed only when the electron changes its orbit.

Solution:
"Radiation is emitted or absorbed only when the transition of the electron takes place from one quantized value of angular momentum to another."

Topic: Chemistry, Structure of Atom, NEET
When does temporary electron displacement occur in a molecule?

Options:
A When it is in the ground state
B When an atom is present
C When a reagent approaches to attack it
D When it is in an excited state

The correct answer is:
When a reagent approaches to attack it

Solution:
Temporary electron displacement effects are seen in a molecule when a reagent approaches to attack it.

Topic: Chemistry, General Organic Chemistry, NEET
When does the decomposition of potassium chlorate take place at a much accelerated rate?

Options:
A At high pressure
B At low temperature
C In the absence of manganese dioxide
D In the presence of manganese dioxide

The correct answer is:
In the presence of manganese dioxide

Solution:
The paragraph mentions that the decomposition of potassium chlorate takes place at a much accelerated rate in the presence of manganese dioxide.

Topic: Chemistry, Surface Chemistry, NEET
When does the electromeric effect predominate?

Options:
A When inductive and electromeric effects operate in the same direction
B When inductive and electromeric effects are absent
C When inductive and electromeric effects operate in opposite directions
D When inductive effect is stronger than the electromeric effect

The correct answer is:
When inductive and electromeric effects operate in opposite directions

Solution:
When inductive and electromeric effects operate in opposite directions, the electromeric effect predominates.

Topic: Chemistry, General Organic Chemistry, NEET
When does the growth rate of a population following the logistic model equal zero? The logistic model is given as dN/dt=rN1-N/K:

Options:
A When N/K is exactly one
B When N nears the carrying capacity of the habitat
C When N/K equals zero
D When death rate is greater than birth rate

The correct answer is:
When N/K is exactly one

Solution:
In logistic growth model population growth equation is described as dN dt =rN( K−N K )
Where,
N= Population density at time t
r= Intrinsic rate of natural increase
K= Carrying capacity
When N K =1 then
K−​N K =0
Therefore,
dN dt =0

Topic: Biology, Organisms and Populations, NEET, NEET 2016 (Phase 1)
When does the internal energy of a system change in thermodynamics?

Options:
A When work is done by the system
B When heat is added to the system
C When matter enters or leaves the system
D All of the above

The correct answer is:
All of the above

Solution:
The internal energy of a system in thermodynamics changes when heat is added to or removed from the system, when work is done on or by the system, and when matter enters or leaves the system.

Topic: Chemistry, Thermodynamics (C), NEET
When does the LH surge occur during the menstrual cycle?

Options:
A At the beginning of the follicular phase
B At the end of the luteal phase
C In the middle of the cycle
D At the end of the menstrual phase

The correct answer is:
In the middle of the cycle

Solution:
The secretion of gonadotropins (LH and FSH) increases gradually during the follicular phase and attain a peak level in the middle of the cycle (about 14th day). Rapid secretion of LH leading to its maximum level during the mid-cycle called LH surge induces rupture of Graafian follicle and thereby the release of ovum (ovulation).

Topic: Biology, Human Reproduction, NEET
When does the menstrual cycle cease in human beings?

Options:
A At ovulation
B At menarche
C During pregnancy
D At menopause

The correct answer is:
At menopause

Solution:
In human beings, the menstrual cycle ceases around 50 years of age, a phase known as menopause.

Topic: Biology, Human Reproduction, NEET
When does the nuclear membrane disappear in meiosis II?

Options:
A During Interkinesis
B During Prophase I
C During Metaphase I
D During Prophase II

The correct answer is:
During Prophase II

Solution:
The nuclear membrane disappears by the end of Prophase II in meiosis II.

Topic: Biology, Cell Cycle and Cell Division, NEET
When does the pairing of electrons in p orbitals start according to Hund's rule?

Options:
A With the entry of the 2nd electron.
B With the entry of the 3rd electron.
C With the entry of the 4th electron.
D With the entry of the 5th electron.

The correct answer is:
With the entry of the 4th electron.

Solution:
"pairing of electrons will start in the p... orbitals with the entry of the 4th electron."

Topic: Chemistry, Structure of Atom, NEET
When dry chlorine gas is passed through silver chlorate heated to 90°C , then which of the oxides of chlorine is obtained ?

Options:
A ClO2
B Cl2O
C Cl2O3
D Cl2O5

The correct answer is:
ClO2

Solution:
2AgClO3+Cl2dry→90°C2AgCl+2ClO2+O2

Topic: Chemistry, p Block Elements (Group 15, 16, 17 & 18), NEET
When dry silver chloride is fused with sodium carbonate, we get pure :

Options:
A Silver
B Chlorine
C Sodium
D Carbonmonoxide

The correct answer is:
Silver

Solution:
4 AgCl + 2 Na 2 CO 3 ⟶ 4 Ag +4 NaCl + 2 CO 2 + O 2

Topic: Chemistry, d and f Block Elements, NEET
When electrical work is done on the system, how is the change in temperature related to the change in internal energy?

Options:
A The change in temperature is directly proportional to the change in internal energy.
B The change in temperature is inversely proportional to the change in internal energy.
C The change in temperature is equal to the change in internal energy.
D The change in temperature is not related to the change in internal energy.

The correct answer is:
The change in temperature is directly proportional to the change in internal energy.

Solution:
When electrical work is done on the system, the change in temperature is directly proportional to the change in internal energy, as per the first law of thermodynamics.

Topic: Chemistry, Thermodynamics (C), NEET
When electromagnetic radiation of wavelength $300 \mathrm{~nm}$ falls on the surface of a metal, electrons are emitted with the kinetic energy of $1.68 \times 10^5$ $\mathrm{J} \mathrm{mol}^{-1}$. What is the minimum energy needed to remove an electron from the metal?
$\begin{aligned}
& \left(h=6.626 \times 10^{-34} \mathrm{Js}, \mathrm{c}=3 \times 10^8 \mathrm{~ms}^{-1},\right. \\
& \mathrm{N}_{\mathrm{A}}=6.022 \times 10^{23} \mathrm{~mol}^{-1}
\end{aligned}$

Options:
A $2.31 \times 10^6 \mathrm{~J} \mathrm{~mol}^{-1}$
B $3.84 \times 10^4 \mathrm{~J} \mathrm{~mol}^{-1}$
C $3.84 \times 10^{-19} \mathrm{~J} \mathrm{~mol}^{-1}$
D $2.31 \times 10^5 \mathrm{~J} \mathrm{~mol}^{-1}$

The correct answer is:
$2.31 \times 10^5 \mathrm{~J} \mathrm{~mol}^{-1}$

Solution:
Since, the striking photon has energy equal to $h v \mathrm{v}$ and the minimum energy required to eject the electron is $h v_0$ (work function $\mathrm{W}_0$), the difference in energy $\left(h v-h v_0\right)$ is transferred as the kinetic energy of the photoelectron.
$h v=h v_0+\mathrm{KE}$
$h v_0=$ minimum energy required to remove electron)
Energy of a $300 \mathrm{~nm}$ photon is given by
$\begin{aligned}
& \Rightarrow \mathrm{E}=\frac{h c}{\lambda} \\
& =\frac{6.626 \times 10^{-34} \mathrm{Js} \times 3 \times 10^8 \mathrm{~ms}^{-1}}{300 \times 10^{-9} \mathrm{~m}} \\
& =6.626 \times 10^{-19} \mathrm{~J}
\end{aligned}$
Energy of one mole of photons
$\begin{aligned}
& =6.626 \times 10^{-19} \mathrm{~J} \times 6.022 \times 10^{23} \mathrm{~mol}^{-1} \\
& =3.99 \times 10^5 \mathrm{~J} \mathrm{~mol}^{-1}
\end{aligned}$
The minimum energy needed to remove one mole of electrons $=(3.99-1.68) \times 10^5 \mathrm{~J} \mathrm{~mol}^{-1}$ $=2.31 \times 10^5 \mathrm{~J} \mathrm{~mol}^{-1}$

Topic: Chemistry, Structure of Atom, NEET, NEET 2022 (Phase 2)
When electromagnetic radiation of wavelength 300 nm falls on the surface of sodium, electrons are emitted with a kinetic energy of 1.68 ×105J mol–1. (i) What is the minimum energy needed to remove an electron from sodium? and (ii) What is the maximum wavelength that will cause a photoelectron to be emitted?

Options:
A (i) 3.84×10–19J and (ii) 517 nm
B (i) 4.54×10–19J and (ii) 634 nm
C (i) 5.67×10–19J and (ii) 428 nm
D (i) 3.84×10–19J and (ii) 239 nm

The correct answer is:
(i) 3.84×10–19J and (ii) 517 nm

Solution:
Correct Option is : (A)
(i) 3.84×10–19J and (ii) 517 nm

Topic: Chemistry, Structure of Atom, NEET
When electron jumps from n=4 level to n=1 level, the angular momentum changes by

Options:
A h2π
B 2h2π
C 3h2π
D 4h2π

The correct answer is:
3h2π

Solution:
From Bohr's assumption, the angular momentum of n th level
mvr=nh2π
The angular momentum of n=4 level
mvr4=4×h2π
The angular momentum of n=1 level
mvr1=1×h2π
Change in angular momentum.
Δmvr=4h2π-h2π=3h2π

Topic: Physics, Atomic Physics, NEET
When environmental conditions are favourable, then the population growth curve will be

Options:
A Hyperbola
B ‘J' Shaped
C ‘S’ shaped
D None of these

The correct answer is:
‘J' Shaped

Solution:
The J-shaped growth curve is shown by a small population reared in a natural environment with plenty of food but no predator. In this case, there is a rapid increase in population until the food is available, but after the decrease in the availability of food, there is a sudden increase in mortality rate and it is called population crash. E.g. Many insect populations show exponential growth and increase in their population size in the rainy season but are followed by a population crash at the end of the rainy season.

Topic: Biology, Organisms and Populations, NEET
When environmental conditions are most favourable, then the population growth curve will be:

Options:
A K shaped
B 'J' shaped
C 'S' shaped
D Straight line

The correct answer is:
'J' shaped

Solution:
Any species growing exponentially under unlimited resource conditions can reach enormous population density in short time and such growth forms a J shaped curve.

Topic: Biology, Organisms and Populations, NEET
When equal number of coulomb of electricity is passed through aqueous solution of AX and BX2 and if number of moles of A and B deposited respectively are Y and Z then -

Options:
A Y=Z
B Y < Z
C Z=2Y
D Y=2Z

The correct answer is:
Y=2Z

Solution:
A + + e â âA B 2+ +2 e â âB
Let n coulombs of electricity is passed through the aqueous solution
â´no of moles of A deposited=Y mole=n
no of moles of B deposited=n/2=Z mole
â´Y2=Z
Y=2Z

Topic: Chemistry, Electrochemistry, NEET
When equal volume of the following solutions are mixed, which of the following gives maximum precipitate? ( Ksp of AgCl=10-12 )

Options:
A 10-4MAg+ and 10-4MCl-
B 10-3MAg+ and 10-3MCl-
C 10-5MAg+ and 10-5MCl-
D 10-6MAg+ and 10-6MCl-

The correct answer is:
10-3MAg+ and 10-3MCl-

Solution:
For precipitation the value of ionic product must be more than Ksp so that a super saturated solution is possible and precipitation occurs at once.
Here 10–3MAg×10–3MCl–>Ksp(10-12)
i.e. precipitation occurs maximum in it.

Topic: Chemistry, Ionic Equilibrium, NEET
When ethyl iodide and n-propyl iodide are allowed to react with sodium in the presence of dry ether, the number of alkanes that would be produced is

Options:
A only one
B two
C three
D four

The correct answer is:
three

Solution:
When ethyl iodide and n-propyl iodide are allowed to react with sodium in the presence of dry ether, the number of alkanes that would be three as follows
2CH3-CH2-I→NaCH3-CH2-CH2-CH3
2CH3-CH2-CH2-I→NaCH3-CH2-CH2-CH2-CH2-CH3n-hexane
CH3-CH2-I+CH3-CH2-CH2-I→NaCH3-CH2-CH2-CH2-CH3n-pentane

Topic: Chemistry, Hydrocarbons, NEET
When Ethylchloride and alcoholic KOH are heated, the compound obtained is

Options:
A C2H4
B C2H2
C C6H6
D C2H6

The correct answer is:
C2H4

Solution:
We know that
CH3CH2Cl+KOH→CH2=CH2+KCl+H2O
Thus, in this reaction Ethene (C2H4) is produced.

Topic: Chemistry, Haloalkanes and Haloarenes, NEET
When fungi feed on dead organic matter, they are known as

Options:
A Dimorphic
B Parasites
C Saprophytes
D None of these

The correct answer is:
Saprophytes

Solution:
All fungi are heterotrophs in their nutrition. Some depend upon organic matter known as saprophytes.

Topic: Biology, Biological Classification, NEET
When gene targeting involving gene amplification is attempted in an individual's tissue to treat disease, it is known as:

Options:
A Biopiracy
B Gene therapy
C Molecular diagnosis
D Safety testing

The correct answer is:
Gene therapy

Solution:
Recombinant DNA technology, Polymerase Chain Reaction (PCR) or gene amplification, and Enzyme-Linked Immuno-sorbent Assay (ELISA) are some of the techniques that serve the purpose of early diagnosis. This is the use of recombinant DNA technology in gene therapy.

Gene therapy is a collection of methods that allows the correction of a gene defect that has been diagnosed in a child/embryo.

Topic: Biology, Biotechnology and Its Applications, NEET, NEET 2021
When glucose undergoes oxidation with nitric acid, what dicarboxylic acid is formed?

Options:
A Gluconic acid
B Saccharic acid
C Acetic acid
D Lactic acid

The correct answer is:
Saccharic acid

Solution:
Both glucose and gluconic acid yield saccharic acid upon oxidation with nitric acid.

Topic: Chemistry, Biomolecules, NEET
When glycerol combines with three fatty acids on each of the OH groups through ester bonds, it is known as ___.

Options:
A monoglyceride
B diglyceride
C triglyceride
D tetraglyceride

The correct answer is:
triglyceride

Solution:
When glycerol combines with three fatty acids on each of the OH groups through ester bonds, it is known as triglyceride

Topic: Biology, Biomolecules (B), NEET
When ground slurry of living tissue is strained through a cheesecloth, the filtrate is obtained. Select the correct statement regarding the filtrate.

Options:
A It is acid soluble fraction.
B It possess inorganic compounds only.
C It is a mixture of macromolecules and micromolecules.
D Only 4 compounds are obtained.

The correct answer is:
It is acid soluble fraction.

Solution:
Filtrate (acid soluble fraction): It consists of thousands of compounds (organic and inorganic). The molecular weight ranges from 18 to 800 Daltons (Da). Thus, these compounds are known as micromolecules or simply biomolecules.

Topic: Chemistry, Biomolecules, NEET
When gynoecium is present in the topmost position of thalamus, the flower is known as:

Options:
A Inferior
B Epigynous
C Perigynous
D Hypogynous

The correct answer is:
Hypogynous

Solution:
In hypogynous conditions of flowers, gynoecium (female reproductive organ) is occupied the topmost (superior) position at the thalamus and other parts of flower arise from below the gynoecium, e.g., Hibiscus rosa sinensis (gurhal).

Topic: Biology, Morphology of Flowering Plants, NEET
When H2O2 is added to an acidified solution of K2Cr2O7

Options:
A solution turns green due to formation of Cr2O3
B solution turns yellow due to formation of K2CrO4
C a deep blue-violet coloured compound CrO(O2)2 is formed
D solution gives the green precipitate of Cr(OH)3

The correct answer is:
a deep blue-violet coloured compound CrO(O2)2 is formed

Solution:
H2O2+Cr2O4-2+H+→CrO5Blue colour+H2O

Topic: Chemistry, d and f Block Elements, NEET