datavorous/entrance-exam-dataset huggingface dataset:
The sequence of ionic mobility in aqueous solution is

Options:
A $\mathrm{K}^{+}>\mathrm{Na}^{+}>\mathrm{Rb}^{+}>\mathrm{Cs}^{+}$
B $\mathrm{Cs}^{+}>\mathrm{Rb}^{+}>\mathrm{K}^{+}>\mathrm{Na}^{+}$
C $\mathrm{Rb}^{+}>\mathrm{K}^{+}>\mathrm{Cs}^{+}>\mathrm{Na}^{+}$
D $\mathrm{Na}^{+}>\mathrm{K}^{+}>\mathrm{Rb}^{+}>\mathrm{Cs}^{+}$

The correct answer is:
$\mathrm{Cs}^{+}>\mathrm{Rb}^{+}>\mathrm{K}^{+}>\mathrm{Na}^{+}$

Solution:
Key Idea: The smaller the size of ion, the greater the degree of hydration and Mobility of ion in aqueous solution
$$
\propto \frac{1}{\text { size of ion in aqueous solution }}
$$
Generally in a group size or radii of ions increases, so Li has smallest size thus bind maximum number of water molecules with itself and becomes largest in size (in aqueous solution). Hence, the order of ionic radii (size) of alkali metal ions in aqueous solution is
$$
\mathrm{Li}^{+}>\mathrm{Na}^{+}>\mathrm{K}^{+}>\mathrm{Rb}^{+}>\mathrm{Cs}^{+}
$$
Thus, the order of mobility
$$
\mathrm{Cs}^{+}>\mathrm{Rb}^{+}>\mathrm{K}^{+}>\mathrm{Na}^{+}>\mathrm{Li}^{+}
$$

Topic: Chemistry, s Block Elements, NEET, NEET 2008 (Screening)
The sequence of ionic mobility in aqueous solution is

Options:
A Rb+ > K+ > Cs+ > Na+
B Na+ > K+ > Rb+ > Cs+
C K+ > Na+ > Rb+ > Cs+
D Cs+ > Rb+ > K+ > Na+

The correct answer is:
Cs+ > Rb+ > K+ > Na+

Solution:
Smaller the size of cation, higher will be the hydration and its effective size will increase and hence mobility in aqueous solution will decrease. Larger size ions have more ionic mobility due to less hydration. Thus the degree of hydration of M+ ions decreases from Li+ to Cs+. Consequently the radii of the hydrated ion decreases from Li+ to Cs+. Hence the ionic conductance of these hydrated ions increases from Li+ to Cs+.

Topic: Chemistry, s Block Elements, NEET
The sequence of N-bases in one strand of DNA is '3 TAC CAC TCC ATA ATT 5'. How many purines will be present in the Watson crick structure of this DNA?

Options:
A 18
B 5
C 15
D 10

The correct answer is:
15

Solution:
A purine is an aromatic heterocycle composed of carbon and nitrogen. Purines include adenine and guanine, which participate in DNA and RNA formation. Purine is a heterocyclic aromatic organic compound that consists of a pyrimidine ring fused to an imidazole ring.
According to the WatsonâCrick model of DNA, DNA is double-stranded.
The given sequence of a DNA strand is:
3' TAC CAC TCC ATA ATT 5'
5' ATG GTG AGG TAT TAA 5'

Topic: Biology, Molecular Basis of Inheritance, NEET
The sequence of nitrogen bases in a portion of a DNA segment of a template strand was AAT GCT TAG GCA. What will be the sequence of nitrogen bases in the corresponding region of the transcribed mRNA?

Options:
A UUT CGT TUC CGU
B AAT GCT TAG GCA
C UUA CGA AUC CGU
D TTA CGA ATC CGT

The correct answer is:
UUA CGA AUC CGU

Solution:
If the sequence of nitrogen bases in a portion of a template DNA is AAT GCT TAG GCA, the sequence of nitrogen bases in the corresponding region of the transcribed mRNA will be UUA CGA AUC CGU

Topic: Biology, Molecular Basis of Inheritance, NEET
The sequence of nucleotides AUGCUUCUC indicates that it is a segment of

Options:
A Sense strand of DNA
B Antisense strand of DNA
C RNA
D Polypeptide chain

The correct answer is:
RNA

Solution:
Thus chain contain A, U, C and G which are nitrogen bases Adenine, Guanine, Cytosine and Guanine respectively. These nitrogen bases are found only in nucleic acids and not in polypeptides. It contains Uracil which is found in RNA and not in DNA

Topic: Biology, Molecular Basis of Inheritance, NEET
The sequence of reactions involved in the production of biogas is

Options:
A Hydrolysis - Methanogenesis - Hydrolysis
B Acetogenesis - Methanogenesis - Hydrolysis
C Hydrolysis - Hydrolysis - Acetogenesis
D Hydrolysis - Acetogenesis - Methanogenesis

The correct answer is:
Hydrolysis - Acetogenesis - Methanogenesis

Solution:
The sequence of reactions in biogas production are
(1) Hydrolysis - a breakdown of complex polymers to simple forms or solubilization.
(2) Acetogenesis - formation of organic acids.
(3) Methanogenesis - formation of methane gas.

Topic: Biology, Microbes in Human Welfare, NEET
The sequence of the polarizability of I – , Br – , Cl – and F – ions is

Options:
A I->Br->Cl->F-
B I->Br-=Cl->F-
C I-=Br-=Cl->F-
D I-=Br-<Cl-=F-

The correct answer is:
I->Br->Cl->F-

Solution:
Applying Fajan's rules:
Larger the anion, more the polarization of electron density towards cation.

I->Br->Cl->F-

Topic: Chemistry, p Block Elements (Group 15, 16, 17 & 18), NEET
The sequence that controls the copy number of the linked DNA in the vector, is termed

Options:
A Ori site
B Palindromic sequence
C Recognition site
D Selectable marker

The correct answer is:
Ori site

Solution:
Origin of replication (ori): This is a sequence from where the replication starts and thus any piece of DNA, when linked to this sequence, is also replicated within the host cells. Thus, an alien DNA that is linked with the origin of replication can replicate and multiply itself in the host organism. This is known as cloning or making multiple identical copies of any template DNA. Ori sites are also responsible for controlling the copy number of the alien or linked DNA. So, if many target DNA copies are required, they should be cloned in a vector whose origin supports a high copy number.

Topic: Biology, Biotechnology - Principles and Processes, NEET, NEET 2020 (Phase 1)
The serial arrangement of taxon/taxonomic category is known as

Options:
A Category
B Classification
C Hierarchy
D Taxonomy

The correct answer is:
Hierarchy

Solution:
Category is rank or level in the hierarchical classification of organisms. Classification is the arrangement of organisms or groups of organisms in distinct categories in accordance with a particular and well established plan.
Taxonomy is the branch of biology which deals with the collection, identification, nomenclature, description and classification of plants and animals.

Topic: Biology, The Living World, NEET
The series of cyclic physiological changes occurring in the female reproductive tract is called ____.

Options:
A Oogenesis
B Menstrual cycle
C Parturition
D Lactation

The correct answer is:
Menstrual cycle

Solution:
The series of cyclic physiological changes occurring in the female reproductive tract is called menstrual cycle

Topic: Biology, Human Reproduction, NEET
The series of events that take place in one complete heartbeat is called ___.

Options:
A Cardiac cycle
B Cardiac output
C Cardiac arrest
D None of the above

The correct answer is:
Cardiac arrest

Solution:
The series of events that take place in one complete heartbeat is called cardiac cycle

Topic: Biology, Body Fluids and Circulation, NEET
The set having incorrect statements is
1. the Hall-Heroult process is used for the production of aluminium and iron
2. pig iron is obtained from cast iron
3. the blistered appearance of copper during the metallurgical process is due to the evolution of C O 2
4. leaching of bauxite using concentrated NaOH solution gives sodium aluminate and sodium silicate

Options:
A 1, 2
B 2, 3
C 1, 2, 3
D 1, 2, 4

The correct answer is:
1, 2, 3

Solution:
Here only statement 4 is correct while rest are incorrect as
Hall-Heroult process is used for production of only aluminium.
Cast iron is obtained from pig iron
Pig iron4%âblast of air castiron3%
The blistered appearance of copper during the metallurgical process is due to the evoluation of S O 2 .
Cu2S+2Cu2Oâ6Cu+SO2
During leaching when bauxite is treated with concentrated NaOH, then sodium aluminate and sodium silicate is formed in the soluble form, whereas F e 2 O 3 is precipitated.

Topic: Chemistry, General Principles and Processes of Isolation of Metals, NEET
The set of enzymes used for clarification of fruit juices are:

Options:
A Cellulase and protease
B Protease and pectinase
C Pectinase and cellulase
D Hydrolase and protease

The correct answer is:
Protease and pectinase

Solution:
Bottled juices brought from the market are more clear than home made juices as they are treated with enzyme pectinase and proteinase which dissolves the fibres present in the juice.

Topic: Biology, Microbes in Human Welfare, NEET
The set of four quantum numbers not possible from the following.

Options:
A n=3,l=0,m=0,s=-12
B n=3,l=2,m=0,s=-12
C n=3,l=3,m=-3,s=-12
D n=3,l=2,m=-2,s=-12

The correct answer is:
n=3,l=3,m=-3,s=-12

Solution:
If n=3 then lâ=â0 to nâ1 and m = −l to +âl

Topic: Chemistry, Structure of Atom, NEET
The set of hormones that are collectively knowns as gonadotrophins are

Options:
A Oxytocin, FSH, LH
B Estrogen, Progesterone and LH
C Testosterone, Estradiol and FSH
D FSH, LH and TSH

The correct answer is:
Oxytocin, FSH, LH

Solution:
FSH and LH are major and prolactin is a weak gonadotropins secreted by the pituitary gland in humans. These stimulate the gonads - in males, the testes, and in females, the ovaries. They are not necessary for life but are essential for reproduction.

Topic: Biology, Chemical Coordination and Integration, NEET
The set of physical quantities among the following which is dimensionally different is

Options:
A Terminal velocity, drift velocity, critical velocity
B Potential energy, work done, kinetic energy
C Disintegration constant, frequency, angular velocity
D Dipole moment, electric flux, electric field

The correct answer is:
Dipole moment, electric flux, electric field

Solution:
Dipole moment, P=q⋅d=ITL
Electric flux, ϕ=E.ds=ML3I-1T-3
Electric field, E=k⋅qr2=MLI-1T-3

Topic: Physics, Units and Dimensions, NEET
The set of the organelles/structure that are absent in plant cell are

Options:
A 70S - Ribosome + dictyosomes
B 80S - Ribosome + chloroplast
C Vacuole + chloroplast
D Centriole + mesosomes

The correct answer is:
Centriole + mesosomes

Solution:
Centriole is membrane less structure present in animal cell and some lower plant cell. It is absent in all higher plant cell. Centriole helps in formation of spindle fibre during cell division. It forms basal granule or belpharoplast which form cilia and flagella.

Topic: Biology, Cell - The Unit of Life, NEET
The set representing the correct order of ionic radius is:

Options:
A Na+>Li+>Mg2+>Be2+
B Li+>Na+>Mg2+>Be2+
C Mg2+>Be2+>Li+>Na+

D Li+>Be2+>Na+>Mg2+

The correct answer is:
Na+>Li+>Mg2+>Be2+

Solution:
As on moving left to right across the period radius or ionic radius decreases and on moving down the group it increases so following this periodic trends of size the correct order is Na+>Li+>Mg2+>Be2+

Topic: Chemistry, s Block Elements, NEET
The sexual mode of reproduction in protozoa is called

Options:
A anisogamy
B plasmogamy
C plasmotomy
D schizogamy

The correct answer is:
anisogamy

Solution:
Reproduction is the process of producing fertile offspring which look similar to parents. Sexual mode of reproduction is the reproductive process where two gametic cells fertilize or fuse to produce zygote. Protozoa are group of unicellular organisms coming under the kingdom Protista. These are either free-living or parasitic in nature. Protozoans like Plasmodium, show sexual reproduction via anisogamy where gametes participating are not similar in shape and size. Schizogamy is a type of asexual phase of reproduction.
Protoplasts of two cells fusing to form a new cell is called plasmogamy. A special type of binary fission is called plasmotomy where the multinucleate protozoan cell divides into two or more multinucleate cells.

Topic: Biology, Reproduction in Organisms, NEET
The sexual reproduction is absent in

Options:
A Ulothrix
B Volvox
C Spirogyra
D Nostoc

The correct answer is:
Nostoc

Solution:
Prokaryotes lacks cytoskeleton in their cell; thus, they cannot undergo meiosis. In absence of meiosis, sexual reproduction is not possible. Nostoc being a prokaryotic cyanobacteria cannot show sexual reproduction.

Topic: Biology, Biological Classification, NEET
The shape and starch synthesis in pea seeds is controlled by one gene. Which among the following statements is/are correct for heterozygotes?

(i) Round seeds are due to the law of dominance while the size of the starch grain is due to the law of incomplete dominance.

(ii) Round seeds are due to the law of incomplete dominance while the size of the starch grain is due to the law of dominance.

(iii) Dominance is not an autonomous feature of a gene or the product that it has information for.

Options:
A Both (i) and (ii) are correct but (ii) is false
B Both (ii) and (iii) are correct but (i) is false
C Both (i) and (iii) are correct but (ii) is false
D Only (i) is correct and both (ii) & (iii) are false

The correct answer is:
Both (i) and (iii) are correct but (ii) is false

Solution:
It was observed that the starch synthesis process and the shape of seed are controlled by a single gene. The gene showed two alleles namely, B and b. BB homozygotes combination resulted in large starch grains as compared to that produced by bb homozygotes. After maturation, it was observed that round seeds were expressed by BB condition and bb expressed wrinkled type. Crossing of these resulted in the progeny giving round seeds like that of homozygotes but the starch grain size was intermediate to both homozygotes type. The seed shape followed the Law of Dominance given by Mendel but the starch grain synthesis deviated from it resulting in incomplete dominance.

Topic: Biology, Principles of Inheritance and Variation, NEET
The shape of seed and starch grain size in Pisum sativum is controlled by gene Bb, so the inheritance of seed shape shows ________ relationship, while the inheritance of starch grains show ________.

Options:
A Dominant recessive, codominance
B Incomplete dominance, codominance
C Dominant-recessive, incomplete dominance
D Codominance, incomplete dominance

The correct answer is:
Dominant-recessive, incomplete dominance

Solution:
The shape of seed and starch grain size in Pisum sativum is controlled by gene Bb which shows pleiotropic effect. Gene Bb shows dominant recessive effect for seed shape and it shows incomplete dominance for starch grain size. Gene Bb produces starch branching enzyme which shows multiple pleiotropic effect.

Topic: Biology, Principles of Inheritance and Variation, NEET
The shape of the magnetic field lines due to an infinite long, straight current carrying conductor is:

Options:
A a straight line
B circular
C elliptical
D a plane

The correct answer is:
circular

Solution:
Straight current carrying wire produces circular magnetic field.

Topic: Physics, Magnetic Effects of Current, NEET, NEET 2022 (Phase 2)
The shape of water molecule, which should be tetrahedral has a bent or distorted tetrahedral shape with a bond angle 104.5°. What could be the reason for this?

Options:
A lp-lp repulsion is more than lp-bp repulsion
B lp-bp repulsion is more than lp-lp repulsion
C lp-lp repulsion is equal to lp-bp repulsion
D presence of lone pair does not affect the bond angle

The correct answer is:
lp-lp repulsion is more than lp-bp repulsion

Solution:
Due to presence of lone pairs, the repulsion is more which changes the bond angle to 104.5°.

Topic: Chemistry, Chemical Bonding and Molecular Structure, NEET
The shape of XeF3+ is

Options:
A Trigonal planar
B Pyramidal
C Bent T-shape
D See-saw

The correct answer is:
Bent T-shape

Solution:
In XeF3+ hybridisation of Xe is sp3d and the shape of the molecule is T-shape due to lone pair electronic repulsion.
Shape: Bent T.

Topic: Chemistry, Chemical Bonding and Molecular Structure, NEET
The shape of XeO2F2 molecule is

Options:
A Square planar
B See – saw
C Tetrahedral
D Trigonal bipyramidal

The correct answer is:
See – saw

Solution:
In XeO2F2 there are 4 sigma bond pair and 1 lone pair of electrons so due to electronic repulsion shape is see-saw and hybridization of sp3d .
(see - saw)

Topic: Chemistry, Chemical Bonding and Molecular Structure, NEET
The shared terminal duct of the reproductive and urinary system in the human male is:

Options:
A Urethra
B Ureter
C Vas deferens
D Vasa efferentia

The correct answer is:
Urethra

Solution:
Urethra is the urinary duct which originates from the neck of urinary bladder and opens to the exterior at the tip of penis in males.

The urethra in the human male act as a common terminal duct for the urinary system and reproductive system. The urethra acts as an exit point for the urine (urinary system) and semen (reproductive system). The semen exit from the urethra at the time of ejaculation.

Topic: Biology, Human Reproduction, NEET, NEET 2014
The shared terminal duct of the reproductive & urinary system in the human female is

Options:
A urethra.
B ureter.
C cervical canal.
D no such common duct exist.

The correct answer is:
no such common duct exist.

Solution:
External genitalia in human females is known as Vulva. It consists of labia majora, labia minora, mons pubis and clitoris. It also has a vestibule which shows two openings. One is vaginal opening for menstrual flow, entry of penis and parturition. Other opening is urethral opening for outflow of urine. Thus there are two different openings in females unlike males. Hence the two systems: reproductive and excretory systems are separate systems and thus there is no shared duct between these two systems.

Topic: Biology, Human Reproduction, NEET
The sheath enclosing plumule and radicle respectively in monocot seed is:

Options:
A Coleoptile and coleorhizae
B Coleorhiza and coleoptile
C Scutellum and epiblast
D Aleurone layer and pericarp

The correct answer is:
Coleoptile and coleorhizae

Solution:
The key difference between coleoptile and coleorhiza is that the coleoptile is a protective sheath of the young shoot tip of monocot plants while the coleorhiza is a protective sheath of the radicle and the root of monocot plants.

Topic: Biology, Sexual Reproduction in Flowering Plants, NEET
The short repeating sequences of DNA useful in DNA fingerprinting are

Options:
A VNTR
B Codons
C Introns
D Exons

The correct answer is:
VNTR

Solution:
VNTRs are short, repeated sequences of nucleotides ranging between 20-100 base pairs which provides the scientific marker of identity known as DNA fingerprint.

Topic: Biology, Molecular Basis of Inheritance, NEET
The shorter and longer arms of a submetacentric chromosome are referred to as:

Options:
A s-arm and l-arm respectively
B p-arm and q-arm respectively
C q-arm and p-arm respectively
D m-arm and n-arm respectively

The correct answer is:
p-arm and q-arm respectively

Solution:
Sub-metacentric chromosome or submedian centromere : The centromere is present slightly away from the center of a chromosome or nearer to one end of the chromosome. As a result, chromosome is divided into one shorter (p arm) and one longer (q arm).

Topic: Biology, Cell - The Unit of Life, NEET, NEET 2019 (All India)
The shortest distance travelled by a particle (performing S.H.M.) from mean position in 2 seconds is equal to 3 2 of its amplitude. Find its period.

Options:
A 11 s

B 12 s

C 13 s

D 14 s

The correct answer is:
12 s

Solution:
When t = 2 s , y = 3 2 r
Now, y = r sin ωt
∴ 3 2 r = r sin ω × 2 or sin 2 ω = 3 2
or 2 ω = π 3 or ω = π 6
Hence, T = 2 π ω = 2 π π /6 = 1 2 s

Topic: Physics, Oscillations, NEET
The shortest wavelength in hydrogen spectrum of Lyman series when RH=109678 cm-1 is

Options:
A 1215.67 Å
B 1002.7 Å
C 911.7 Å
D 1234.7 Å

The correct answer is:
911.7 Å

Solution:
The shortest wavelength in hydrogen spectrum of Lyman series is given by formula
1λ=RHn2=RH12=1096781
λ=9.117×10-6cm
=911.7×10-10m=911.7Å

Topic: Chemistry, Structure of Atom, NEET
The shortest wavelength of Lyman series of the hydrogen atom is equal to the shortest wavelength of Balmer series of a hydrogen-like atom of atomic number Z. The value of Z is equal to

Options:
A 2
B 3
C 4
D 6

The correct answer is:
2

Solution:
13.6Z2122-1∞=13.6112-1∞2
⇒Z=2

Topic: Physics, Atomic Physics, NEET
The shortest wavelength of the Brackett series of a hydrogen like atom (atomic number =Z ) is the same as the shortest wavelength of the Balmar series of hydrogen atom. The value of Z is

Options:
A 2
B 3
C 4
D 6

The correct answer is:
2

Solution:
Shortest wavelength of Brackett series corresponds to the transition of electron between n1=4 and n2=â and the shortest wavelength of Balmer series corresponds to the transition of electron between n1=2 and n2=â , So,
z213.616=13.64
â´ Z2=4
or Z=2

Topic: Physics, Atomic Physics, NEET
The shortest wavelength of X-rays emitted from an X-ray tube depends on

Options:
A the current in the tube
B the voltage applied to the tube
C the nature of the gas in tube
D the atomic number of the target material

The correct answer is:
the voltage applied to the tube

Solution:
Shortest wavelength or cut - off wavelength depends only upon the voltage applied in the coolidge tube.

Topic: Physics, Atomic Physics, NEET
The shortest wavelength of X-rays emitted from an X-ray tube depends on

Options:
A The current in the tube
B The voltage applied to the tube
C The nature of the gas in tube
D The atomic number of the target material

The correct answer is:
The voltage applied to the tube

Solution:
Shortest wavelength or cut - off wavelength depends only upon the voltage applied in the coolidge tube.

Topic: Physics, Atomic Physics, NEET
The shoulder blade is called as

Options:
A Clavicle
B Humerus
C Ilium
D Scapula

The correct answer is:
Scapula

Solution:
Scapula (shoulder blade) is the largest of the bones that make up each half of the pectoral (shoulder) girdle. It is a flat triangular bone, providing anchorage for the muscles of the forelimb and articulation for the humerus at the glenoid cavity. It is joined to the clavicle (collar bone) in front. The clavicle is a bone that forms part of the pectoral (shoulder) girdle, linking the scapula (shoulder blade) to the sternum (breast bone). In humans, it forms the collar bone and serves as a brace for the shoulders. The humerus is the bone of the upper arm which articulates with the scapula (shoulder blade) at the glenoid cavity and with the ulna and radius (via a condyle) at the elbow. Ilium is the largest of the three bones that make up each half of the pelvic girdle. The ilium bears a flattened wing of bone that is attached by ligaments to the sacrum.

Topic: Biology, Locomotion and Movement, NEET
The shows two NAND gates followed by a NOR gate. The system is equivalent to the following logic gate

Options:
A OR
B AND
C NAND
D None of these

The correct answer is:
AND

Solution:
From Question A.B¯+B.C¯¯
⇒A.B.B.C
⇒A.B.C
Hence the gate is AND

Topic: Physics, Semiconductors, NEET
The S.I. unit of specific heat capacity is

Options:
A JÂ K-1
B JÂ kg-1
C J mo l −1   K −1
D Jâk g â1 â K â1

The correct answer is:
J k g −1   K −1

Solution:
The S.I. unit of specific heat capacity is J k g −1   K −1

Topic: Physics, Units and Dimensions, NEET
The sides of a rectangle are 6.01 m and 12 m. Taking the significant figures into account, the area of the rectangle is

Options:
A 7.2 m2
B 72.1 m2
C 72 m2
D 72.12 m2

The correct answer is:
72 m2

Solution:
Result should have only two significant numbers (same as in 12 m).

Topic: Physics, Units and Dimensions, NEET
The signals for parturition originate from

Options:
A placenta only
B placenta as well as fully developed foetus
C oxytocin released from maternal pituitary
D fully developed foetus only

The correct answer is:
placenta as well as fully developed foetus

Solution:
The process of giving birth to a baby is called parturition. Parturition is induced by a complex neuroendocrine mechanism. The signals for parturition originate from the fully developed foetus and the placenta, which induce mild uterine contractions called foetal ejection reflex.

Topic: Biology, Human Reproduction, NEET, NEET 2010 (Screening)
The simple harmonic motion of a particle is given by x=asin⁡2πt. Then, the location of the particle from its mean position at a time 18th of a second is

Options:
A a
B a2
C a2
D a4

The correct answer is:
a2

Solution:
Given, x=asinâ¡2Ï t
x=asin2ÏÃ18
x=asinâ¡Ï4
x=a2

Topic: Physics, Oscillations, NEET