datavorous/entrance-exam-dataset huggingface dataset:
The speed of an electron in the orbit of the hydrogen atom in the ground state is (c is speed of light)

Options:
A c
B c2
C c10
D c137

The correct answer is:
c137

Solution:
V=9Ã109Ã2Ïe2nh=2.18Ã106 m/s
Or V=2.18Ã1063Ã108c=c137

Topic: Physics, Atomic Physics, NEET
The speed of light in vacuum is equal to

Options:
A μ0ε0
B μ0ε0
C 1μ0ε0
D 1μ0ε0

The correct answer is:
1μ0ε0

Solution:
The speed of light in the vacuum is given by the formula
c=1μ0ε0
Where, μ0= permeability of vacuum or air
ε0= permittivity of air.

Topic: Physics, Electromagnetic Waves, NEET
The speed of migration of ions in an electric field during gel electrophoresis depends on

Options:
A Magnitude of charge and mass of molecules
B Magnitude of charge, size and shape of molecules
C Magnitude of charge, shape and mass of molecules
D Shape and size of the molecule

The correct answer is:
Magnitude of charge, size and shape of molecules

Solution:
Electrophoresis is a technique of separation of charged molecules under the influence of an electrical field so that they migrate in the direction of electrode bearing the opposite charge, viz., positively charged molecules move towards cathode (-ve electrode) and negatively charged molecules travel towards anode (+ve electrode) through a medium/matrix. This technique was developed by A. Tiselius in 1937. Any charged ion or molecule migrates when placed in an electric field. The rate of migration depend upon its net charge, size, shape and the applied electric current.

Topic: Biology, Biotechnology - Principles and Processes, NEET
The speed v reached by a car of mass m driven with constant power P is given by

Options:
A v=3xPm
B v=3xPm1/2
C v=3xPm1/3
D v=3xPm2

The correct answer is:
v=3xPm1/3

Solution:
P=Fv
or P=mvdvdxv
or ∫0vv2dv= ∫0xPmdx
v33= Pxm or v=3Pxm1/3

Topic: Physics, Work Power Energy, NEET
The sperm produces substances of enzymatic nature called sperm lysin. In mammals, it is called

Options:
A hyaluronidase.
B hyaluronic acid.
C androgamone.
D fertilizin.

The correct answer is:
hyaluronidase.

Solution:
Hyaluronidase, corona penetrating enzyme and acrosin are collectively called sperm lysin and are released from the acrosome during acrosomal reaction after the sperm entry.

Topic: Biology, Human Reproduction, NEET
The spermatogenous cell of male gametophyte is:

Options:
A Vegetative cell
B Body cell
C Generative cell
D Stalk cell

The correct answer is:
Generative cell

Solution:
The microspore mother cell divides and develops into pollen grain having two cells, small generative cell and large vegetative cell. The generative cell is found within the cytoplasm of the vegetative cell. The generative cell during the maturation of the pollen grain divides to form two male gametes or sperm cells that participate in the double fertilization process. Thus, the generative cell is also referred to as spermatogenous cells.

Topic: Biology, Sexual Reproduction in Flowering Plants, NEET
The spin magnetic moment of cobalt in the compound Hg[Co(SCN)4] is

Options:
A 3
B 8
C 15
D 24

The correct answer is:
15

Solution:
In the given complex, Co is in +2 oxidation state
27Co=[Ar]183d74s2
Co2+=[Ar]183d7
i.e., it has three unpaired electrons.
So spin magnetic moment = n n+2 = 3 3+2 = 15 B.M.

Topic: Chemistry, Coordination Compounds, NEET
The spin only magnetic moment (in BM) and geometric shape of [Cu(NH3)4]2+ are

Options:
A 2.83, tetrahedral
B 1.73, tetrahedral
C 2.83, square planar
D 1.73, square planar

The correct answer is:
1.73, square planar

Solution:
Electronic configuration of Cu2+ is 4s0 3d9 , during complex formation one electron from 3d gets excited to 4s . Hence the hybridization of Cu is dsp2 , square planar.

Topic: Chemistry, Coordination Compounds, NEET
The spin only magnetic moment value (in Bohr's magneton units) of [Cr(CO)6] is:

Options:
A 0
B 2.84
C 4.90
D 5.92

The correct answer is:
0

Solution:
In Cr (CO) 6 , Cr has 3 d 6 electronic configuration which has no unpaired electrons and hence, zero magnetic moment.
CO is a strong field ligand which causes pairing up of unpaired electrons in d-orbitals of central metal atom.

Topic: Chemistry, Coordination Compounds, NEET
The spinal cord in man extends from the

Options:
A medulla oblongata to the second thoracic vertebra.
B level of third cervical vertebra to the coccyx
C level of the axis to the lowest lumbar vertebra
D medulla oblongata to the level of the second lumbar vertebra

The correct answer is:
medulla oblongata to the level of the second lumbar vertebra

Solution:
Vertebral column consists of 26 vertebrae divided as Cervical, Thoracic, Lumbar, Sacral and Coccygeal. Spinal cord (made up of nervous tissue) passes through this but it extends from medulla to second lumbar vertebrae only. Beyond it only the pia mater of spinal cord extends till the coccyx. Thus the spinal cord does not extend till the full length of vertebral column.

Topic: Biology, Neural Control and Coordination, NEET
The spindle fibres are made up of _______ protein.

Options:
A Myoglobin
B Tubulin
C Albumin
D Myosin

The correct answer is:
Tubulin

Solution:
Spindle fibres are formed of microtubules, which play an important role in movement of chromosomes and centrioles during cell division. Biochemically a profilament of microtubule is made of a protein called tubulin. Tubulin is an acidic protein, which occurs in two different forms called α -tubulin and β -tubulin. Cytoplasmic microtubules are highly dynamic structures constantly forming and dis-appearing depending on cell activities.
Myosin is fibrous functional protein of muscle. Myoglobin protein of muscle cells act as a reservoir of oxygen. Albumin is the smallest and most numerous proteins in the blood which are involved in cargo of toxic materials.

Topic: Biology, Cell Cycle and Cell Division, NEET
The splitting of spectral lines under the influence of magnetic field is known as

Options:
A Photoelectric effect
B Stark effect
C Zeeman effect
D None of these

The correct answer is:
Zeeman effect

Solution:
The splitting of spectral line by the magnetic field is called Zeeman effect.

Topic: Chemistry, Structure of Atom, NEET
The spongocoel of Leucosolenia is lined with

Options:
A porocytes
B choanocytes
C amoebocytes
D spicules

The correct answer is:
choanocytes

Solution:
Leucosolenia belong to Phylum Porifera. These are simplest animals as they show cellular organization. These are asymmetrical with no body cavity and are diploblastic. These show presence of pores all over the body. The two layers present are outer pinacoderm and inner choanoderm which encloses the spongocoel. These show presence of various cells for different functions. Choanocytes are seen on the choanoderm lining the spongocoeal. These are collar cells and are responsible for water transport through water canal system. The body also shows presence of spicules. Amoebocytes are totipotent cells in porifera.

Topic: Biology, Animal Kingdom, NEET
The spores produced by Phycomycetes are-

Options:
A Exogenous in origin, produced by ascocarp
B Endogenous in origin, produced by sporangium
C Exogenous in origin, produced by sporangium
D Exogenous in origin produced by Basidium

The correct answer is:
Endogenous in origin, produced by sporangium

Solution:
Asexual reproduction in Phycomycetes takes place by zoospores (motile) or by aplanospores (non-motile). These spores are endogenously produced in sporangium.

Topic: Biology, Biological Classification, NEET
The Sporozoa are _____ having an infective ____ stage in their life cycle. An example of Sporozoa is the genus______, which causes malaria.

Options:
A ciliates, cyst, Parameacium
B flagellates, spore, Plasmodium
C parasites, cyst, Plasmodium
D parasites, spore, Trypanosoma

The correct answer is:
parasites, cyst, Plasmodium

Solution:
The sporozoans are parasitic protozoans which have an infectious spore-bearing stage in their life cycle. These organisms usually have alternate stages of asexual and sexual reproduction. During the infective stage, these parasites form cysts which divide and produce sporozoites that enter the host's cells and cause infection in them. An example of Sporozoa is the malarial parasite, Plasmodium which causes malaria.

Topic: Biology, Biological Classification, NEET
The sporozoites that cause infection when a female Anopheles mosquito bites a human being are developed in

Options:
A liver of human.
B RBCs of mosquito.
C salivary glands of mosquito.
D intestine of human.

The correct answer is:
salivary glands of mosquito.

Solution:
Malaria is caused by plasmodium protozoa. The life cycle of plasmodium requires two hosts: Man and mosquitoes. Sporozoites are infectious agents of malarial parasites. When female mosquito bites the human, these enter the blood stream. Inside the body these have an erythrocytic and exoerythrocytic cycle. When healthy mosquito bites such an infected human, these agents enter the mosquitoes body and starts its sexual reproduction which transforms into various forms and reside in the salivary gland. This healthy mosquito is now an infected one and if this again bites any human, the same cycle continues.

Topic: Biology, Human Health and Diseases, NEET
The sporozoites that cause infection when a female Anopheles mosquito bites a person, are formed in:

Options:
A liver of the person
B RBCs of mosquito
C salivary glands of mosquito
D gut of mosquito

The correct answer is:
gut of mosquito

Solution:
The sporozoites that cause infection when a female Anopheles mosquito bites a person, are formed in gut of mosquito.

Topic: Biology, Human Health and Diseases, NEET
The spreading of the tumour to the neighbouring tissue is termed as

Options:
A Metagenesis
B Metastasis
C Metamerism
D Metamorphosis

The correct answer is:
Metastasis

Solution:
Metastasis is the most feared property of malignant tumours. During metastasis, cells sloughed from tumours reach distant sites through blood and get lodged in the body to form a new tumour there.

Topic: Biology, Human Health and Diseases, NEET
The spring balance A reads 2 kg with a block of mass m suspended from it. A balance B reads 5 kg when a beaker with liquid is put on the pan of the balance. The two balances are now so arranged that the hanging mass is inside the liquid in a beaker as shown in the figure.

Options:
A The balance A will read more than 2 kg

B The balance B will read less than 5 kg

C The balance A will read less than 2 kg and B will read more than 5 kg
D The balance A will read more than 2 kg and B will read less than 5 kg

The correct answer is:
The balance A will read less than 2 kg and B will read more than 5 kg

Solution:
The effective weight of the block in the liquid will become less than 2 kg due to buoyancy of liquid. As a result of which A will read less than 2 kg.
As the body immersed in liquid has some effective weight acting downwards so the reading of B will be more than 5 kg.

Topic: Physics, Mechanical Properties of Fluids, NEET
The square root of the product of inductance and capacitance has the dimension of

Options:
A Length
B Mass
C Time
D Frequency

The correct answer is:
Time

Solution:
We know, f=12ÏLC
Or LC=12Ïf=time
Thus, LC has the dimension of time.

Topic: Physics, Units and Dimensions, NEET
The square root of the product of inductance and capacitance has the dimension of

Options:
A length
B mass
C time
D frequency

The correct answer is:
time

Solution:
We know, f=12ÏLC
Or LC=12Ïf=time
Thus, LC has the dimension of time.

Topic: Physics, Units and Dimensions, NEET
The stability of +1 oxidation state among Al, Ga, In and Tl increases in the sequence:

Options:
A Ga<In<Al<Tl
B Al<Ga<In<Tl
C Tl<In<Ga<A
D In<Tl<Ga<Al

The correct answer is:
Al<Ga<In<Tl

Solution:
Stability of +1 oxidation state due to inert pair effect is in the order Al<Ga<In<Tl

Topic: Chemistry, d and f Block Elements, NEET
The stability of carbanions in the following
(1) $\mathrm{RC} \equiv \stackrel{\ominus}{\mathrm{C}}$
(2)
(3)\(\mathrm{R}_2 \mathrm{C}=\stackrel{\ominus}{\mathrm{C}}\mathrm{H}\)
(4) $\mathrm{R}_3 \mathrm{C}-\stackrel{\ominus}{\mathrm{C}} \mathrm{H}_2$
is in the order of

Options:
A (1) $>$ (2) $>$ (3) $>$ (4)
B $(2)>(3)>(4)>(1)$
C (4) $>$ (2) $>$ (3) $>$ (1)
D (1) $>$ (3) $>$ (2) $>$ (4)

The correct answer is:
(1) $>$ (2) $>$ (3) $>$ (4)

Solution:
Key Idea : When scharacter increases, then electrons becomes more closer to the nucleus and structure is of lower energy and is more stable. The stability order of carbanions is as :
$$
\mathrm{RC} \equiv \mathrm{C}^{\ominus}>\mathrm{C}_6 \mathrm{H}_5^{\ominus}>\mathrm{R}_2 \mathrm{C}=\stackrel{\ominus}{\mathrm{C}} \mathrm{H}>\mathrm{R}_3 \mathrm{C}-\stackrel{\ominus}{\mathrm{C}} \mathrm{H}_2
$$

Topic: Chemistry, General Organic Chemistry, NEET, NEET 2008 (Screening)
The stability of carbanions in the following

i RCâ¡ C Â¯ * ii iii R 2 C= C Â¯ H * iv R 3 Câ C Â¯ H 2 *

is in the order of

Options:
A (iv) > (ii) > (iii) > (i)
B (i) > (iii) > (ii) > (iv)
C (i) > (ii) > (iii) > (iv)
D (ii) . (iii) > (iv) > (i)

The correct answer is:
(i) > (ii) > (iii) > (iv)

Solution:
Stability of carbanion increases with increase in s% and decreases the number of electron releasing group. So the order of stability of carbanions is

Topic: Chemistry, General Organic Chemistry, NEET
The stability of Cu2+ is more than Cu+ salts in aqueous solution due to -

Options:
A second ionisation enthalpy.
B first ionisation enthalpy.
C enthalpy of atomization.
D hydration energy.

The correct answer is:
hydration energy.

Solution:
The stability of Cu2+ (aq) rather than Cu+ (aq) is due to the much more negative ∆hydHo of Cu2+ (aq) than Cu+ , which more than compensates for the second ionisation enthalpy of Cu. The Cu2+ ion has a greater charge density than Cu+ ion and thus forms much stronger bonds releasing more hydration energy.

Topic: Chemistry, d and f Block Elements, NEET, NEET 2023 (All India)
The stability of lyophilic colloid is due to which of the following

Options:
A charge on their particles
B large size of their particles
C small size of their particles
D solvation by dispersion medium

The correct answer is:
solvation by dispersion medium

Solution:
Lyophilic colloid stabilises due to solvation by dispersion medium

Topic: Chemistry, Surface Chemistry, NEET
The stability of particular oxidation state of a metal in aqueous solution is determined by

Options:
A Enthalpy of sublimation of the metal
B Ionization energy
C Enthalpy of hydration of the metal ion
D All of these

The correct answer is:
All of these

Solution:
The stability of particular oxidation state of a metal in aqueous solution is determined by Enthalpy of sublimation of the metal, Ionization energy and Enthalpy of hydration of the metal ion.
M(s)→Mn+(aq)+ne-

Topic: Chemistry, General Principles and Processes of Isolation of Metals, NEET
The stability order of the given carbocations is:

i.âC l 3 CâC H 2 â ââââââââii.â F 3 CâC H 2 â ââââââââââiii.âH 3 CâC H 2 â

Options:
A i > ii > iii
B iii > i > ii
C iiiÂ >Â iiÂ >Â i
D iiÂ >Â iiiÂ >Â i

The correct answer is:
iii > i > ii

Solution:
As -I effect increases, stability of carbocation decreases. Stronger the electron withdrawing group, lesser the carbocation stability. So ii is least stable and iii is most stable
F 3 Câ CH 2 â < Cl 3 Câ CH 2 â < H 3 Câ CH 2 â

Topic: Chemistry, General Organic Chemistry, NEET
The stage during which separation of the paired homologous chromosomes begins is

Options:
A Diakinesis
B Diplotene
C Pachytene
D Zygotene

The correct answer is:
Diplotene

Solution:
The separation of the paired homologous chromosomes begins in the diplotene stage. In this phase, the dissolution of the synaptonemal complex begins. The recombined homologous chromosomes separate from each other except at the sites of crossovers.

Zygotene is the second stage of prophase I of meiosis. It is associated with the formation, of synapsis.

Pachytene during which crossing over occurs between non-sister chromatids of the homologous chromosomes.

Diakinesis is the final stage of meiotic prophase-I. This is marked by terminalization of chiasmata.

Topic: Biology, Cell Cycle and Cell Division, NEET, NEET 2018
The stage of Plasmodium falciparum infective to humans are formed in the

Options:
A liver of human
B RBCs of mosquito
C salivary glands of mosquito
D intestine of human

The correct answer is:
salivary glands of mosquito

Solution:
Malaria is caused by plasmodium protozoa. The life cycle of plasmodium requires two hosts : Man and Mosquitoes. Sporozoites are infectious stage of malarial parasites. When female mosquito bites the human, these enter the blood stream. Inside the body these have an Erythrocytic and Exo erythrocytic cycle. When healthy mosquito bites such an infected human, these agents enter the mosquitoes body and starts its sexual reproduction which transforms into various forms and reside in the salivary gland. This healthy mosquito is now a carrier and if this again bites any human, the same cycle continues.

Topic: Biology, Human Health and Diseases, NEET
The stage transferred into the uterus after induced fertilization of ovum in the laboratory is:

Options:
A embryo at 4 blastomeres stage
B embryo at 2 blastomeres stage
C morula
D zygote.

The correct answer is:
morula

Solution:
Morula is a stage of embryo, having solid ball of cells, having 8-16 cells which is transferred into uterus via Intra uterine Transfer (IUT). The zygote or embryo with upto 8 blastomeres is transferred into the fallopian tube. This is called zygote intra fallopian transfer (ZIFT).
Related Theory
In vitro fertilization involves the fertilization of ovum with sperm outside the body of mother in a glass container. The embryo transfer $(E T)$ is then done in the uterus of the mother through IUT (Intra uterine transfer) to start the development and finally leading to normal birth, also called test tube baby technique. GIFT (Gamete Intrafallopian Transfer) involves transfer of two of the retricved unfertilised oocytes or ova and the sperms into fallopian tube through laparoscope. Fertilization occurs in vivo, in fallopian tube. In AIT (Artificial Insemination Technique), husband's sperms are defective, artificial insemination donor is required. This semen from donor is artificially introduced into the vagina or into uferus (intra uferine insemination).

Topic: Biology, Human Reproduction, NEET, NEET 2013 (Karnataka)
The stain used to visualise mitochondria is

Options:
A Fast green
B Saffanin
C Acetocarmine
D Janus green

The correct answer is:
Janus green

Solution:
Janus green stain is used to visualise mitochondria.

Topic: Biology, Cell - The Unit of Life, NEET
The stalk attaching ovule to the placenta is:

Options:
A Funiculus
B Hilum
C Raphe
D Chalaza

The correct answer is:
Funiculus

Solution:
The ovule of the ovary is attached to the placenta by a slender stalk called funicle. The point of attachment of body of ovule to the funicle is known as hilum. In an inverted ovule, the funicle extends beyond the hilum alongside the ovule forming a sort of ridge. This extended part is called raphe.

Topic: Biology, Sexual Reproduction in Flowering Plants, NEET
The stamens are attached the petals in

Options:
A Lily
B Salvia
C Brinjal
D Mustard

The correct answer is:
Brinjal

Solution:
The androecium consists of stamens. These stamens can be attached to the petal, this condition is known as epipetalous condition. Such a condition is seen in Brinjal.

Topic: Biology, Morphology of Flowering Plants, NEET
The star which appears blue must be

Options:
A very cold
B colder than the Sun
C a black hole
D hotter than the Sun

The correct answer is:
hotter than the Sun

Solution:
From Wein's displacement law, blue star is hotter than the white star i.e. the Sun

Topic: Physics, Thermal Properties of Matter, NEET
The starting material used in Solvay's process are

Options:
A Sodium sulphate
B Brine solution
C Carnallite
D All of these

The correct answer is:
Brine solution

Solution:
When CO2 gas is passed through a brine solution (28% NaCl) saturated with ammonia, it gives sodium bicarbonate which on drying and heating gives sodium carbonate.

Topic: Chemistry, s Block Elements, NEET
The state of an ideal gas is changed as shown, at constant temperature T0. If heat supplied to the gas in process B→C is thrice of work done by gas in A→B, then the pressure of gas in state C is P02n. Find the value of n.

Options:
A 8
B 9
C 7
D 6

The correct answer is:
8

Solution:
QBC=3WAB
nRT0ln⁡PBPC=3nRT0ln⁡P0P0/2
⇒ PC=P016

Topic: Physics, Thermodynamics, NEET
The state of hybridisation of $\mathrm{C}_2, \mathrm{C}_3, \mathrm{C}_5$ and $\mathrm{C}_6$ of the hydrocarbon,
is in the following sequence

Options:
A $\mathrm{sp}, \mathrm{sp}^3, \mathrm{sp}^2$ and $\mathrm{sp}^3$
B $s \mathrm{p}^3, \mathrm{sp}^2, \mathrm{sp}^2$ and $s \mathrm{p}$
C $\mathrm{sp}, \mathrm{sp}^2, \mathrm{sp}^2$ and $\mathrm{sp}^3$
D $\mathrm{sp}, \mathrm{sp}^2, \mathrm{sp}^3$ and $\mathrm{sp}^2$

The correct answer is:
$\mathrm{sp}, \mathrm{sp}^3, \mathrm{sp}^2$ and $\mathrm{sp}^3$

Solution:
Key Idea Count number of $\sigma$ bonds and then find hybridisation as follows.
If number of $\sigma$ bonds $=2$; hybridisation is $\mathrm{sp}$,
If number of $\sigma$ bonds $=3$; hybridisation is $\mathrm{sp}^2$,
If number of $\sigma$ bonds $=4 ;$ hybridisation is $\mathrm{sp}^3$.
Double and triple bonds are not considered while finding hybridisation.

Topic: Chemistry, Chemical Bonding and Molecular Structure, NEET, NEET 2009 (Screening)
The state of hybridisation of central atoms in dimer of BH3 and BeH2.

Options:
A sp2,sp2
B sp3,sp2
C sp3,sp3
D sp2,sp3

The correct answer is:
sp3,sp2

Solution:
The state of hybridisation of central atom in dimer of BH3 and BeH2 are sp3,sp2
2BH3âB2H6
2BeH2âBe2H4

Topic: Chemistry, Chemical Bonding and Molecular Structure, NEET
The statement, "If a chemical process is affected by more than one factor, then its rate will be determined by the factor which is nearest to its minimal value: it is the factor which directly affects the process if its quantity is changed" was proposed by

Options:
A Von Mayer
B Arnon
C Blackman
D Hill

The correct answer is:
Blackman

Solution:
When several factors affect any [bio] chemical process, Blackman’s (1905) law of limiting factors comes into effect. This states the following:
"If a chemical process is affected by more than one factor, then its rate will be determined by the factor which is nearest to its minimal value: it is the factor which directly affects the process if its quantity is changed."

Topic: Biology, Photosynthesis in Higher Plants, NEET
The statement, 'Tiger is in the apex of food chain', indicates

Options:
A Tiger has many enemies
B Tiger has maximum biomass
C Tiger is omnivorous
D Tiger is dependent upon a large number of herbivores

The correct answer is:
Tiger is dependent upon a large number of herbivores

Solution:
Tiger is the top consumer in a food chain. It can feed upon lower carnivores as well as herbivores. Herbivores are dependent upon producers (i.e., green plants) for their food. Thus, indirectly it is also linked with trees (i.e., primary producers).

Topic: Biology, Ecosystem, NEET
The statement which is false among the following is

Options:
A Silicon carbide has a three dimensional structure with each silicon and carbon atom being tetrahedrally surrounded by four atoms of the other kind
B Carbon can form C = S bond because C has the ability to form d π - d π bond
C Boron nitride has structure similar to that of graphite
D Graphite conducts electricity because of the availability of delocalised π electrons

The correct answer is:
Carbon can form C = S bond because C has the ability to form d π - d π bond

Solution:
Carbon does not have d - orbitals to form d π - d π bond.

Topic: Chemistry, p Block Elements (Group 13 & 14), NEET