datavorous/entrance-exam-dataset huggingface dataset:
In three moles of ethane (C2H6), calculate the following: (i) Number of moles of carbon atoms. (ii) Number of moles of hydrogen atoms. (iii) Number of molecules of ethane.

Options:
A (i)6, (ii)18, (iii)18.069 × 1023
B (i)5, (ii)16, (iii)15.069 × 1023
C (i)18, (ii)6, (iii)18.069 × 1023
D (i)16, (ii)5, (iii)15.069 × 1023

The correct answer is:
(i)6, (ii)18, (iii)18.069 × 1023

Solution:
Correct Option is : (A)
(i)6, (ii)18, (iii)18.069 × 1023

Topic: Chemistry, Some Basic Concepts of Chemistry, NEET
In tissue culture, callus can be induced to form shoot or root by altering the ratio of:

Options:
A Auxin to cytokinin
B Cytokinin to ethylene
C Auxin to gibberellin
D Gibberellin to cytokinin

The correct answer is:
Auxin to cytokinin

Solution:
The callus is a mass of undifferentiated cells that produce at the wound edge. It is induced to differentiate by varying the ratio of hormone auxin and cytokinin in the medium. If the callus is transferred to the medium with a high concentration of cytokinin and low concentration of auxin that leads to the development of shoot and if callus is transferred to the medium with a high concentration of auxin and less concentration of cytokinin that leads to the development of roots.

Topic: Biology, Strategies for Enhancement in Food Production, NEET
In tissue culture experiments, leaf mesophyll cells are put in a culture medium to form callus. This phenomenon may be called as:

Options:
A Senescence
B Differentiation
C Dedifferentiation
D Development

The correct answer is:
Dedifferentiation

Solution:
After the divisions are over, differentiation of a cell leads to the attribution of a specialised function. For example the cell forms mesophyll cells. When mesophyll cells are cultured, they form callus, which is an undifferentiated mass of cells. Thus, this is a process of dedifferentiation. The cell of callus can re-differentiate to form organs, or any tissue.

Topic: Biology, Plant - Growth and Development, NEET, NEET 2023 (All India)
In tissue culture experiments of tobacco callus, it was seen that when the culture medium contains 2 ppm of IAA and 2 ppm of kinetin, an undifferentiated mass of callus is produced. If the ratio of kinetin to IAA is increased, then

Options:
A The callus size would increase by repeated cell divisions
B Root initiation would take place
C Shoot initiation would occur
D The callus would die

The correct answer is:
Shoot initiation would occur

Solution:
Kinetin causes organogenesis in tissue culture.
Kinetin is a type of cytokinin, a class of plant hormone that promotes cell division. Kinetin was originally isolated by Miller and Skoog et al. as a compound from autoclaved herring sperm DNA that had cell division-promoting activity.

Topic: Biology, Plant - Growth and Development, NEET
In tissue culture technique, the source of carbon is

Options:
A fructose.
B CO2.
C maltose.
D sucrose.

The correct answer is:
sucrose.

Solution:
Table sugar or sucrose is disaccharide carbohydrate, it is sweet, amorphous, highly soluble in solvent. Table sugar is composed of glucose and fructose. Maltose or malt sugar (less sweater than table sugar) is also disaccharide made up of two molecules of glucose.

Topic: Biology, Strategies for Enhancement in Food Production, NEET
In total internal reflection, when the angle of incidence is equal to the critical angle for the pair of media in contact, what will be angle of refraction?

Options:
A 180o
B 0o
C equal to angle of incidence
D 90o

The correct answer is:
90o

Solution:

Topic: Physics, Ray Optics, NEET, NEET 2019 (All India)
In transgenics, expression of transgene in target tissue is determined by:

Options:
A enhancer
B transgene
C promoter
D reporter.

The correct answer is:
reporter.

Solution:
Reporter genes allow for the identification of transformed cells without the need for selective media, as they encode proteins that are more readily apparent. The gus gene, encodes the enzyme $\beta$-glucuronidase, is extensively used as a marker of plant transformation.
Related Theory
Silencer is a DNA sequence capable of binding transcription regulation factors, called repressors. DNA contains genes and provides the template to produce messenger RNA (mRNA). Thus, silencers prevent genes from being expressed as proleins.

Topic: Biology, Biotechnology - Principles and Processes, NEET, NEET 2004
In two hydrogen atoms X and Y the electrons move around the nucleus in circular orbits of radius R and 4R respectively. The ratio of the time taken by them to compute one revolution is

Options:
A 1 : 4
B 1 : 2
C 1 : 8
D 2 : 1

The correct answer is:
1 : 8

Solution:
r∝ n 2 z  (z = 1 for H-atom)
r x r y = n x n y 2 ⇒ n x n y = 1 2
T =  2πr v
T ∝  n 3 z 2
T x T y = n x n y 3 =1:8

Topic: Chemistry, Structure of Atom, NEET
In two separate experiments equal quantities of an alkyl halide, C4H9Cl , were treated at the same temperature with equal volume of 0.1 molar and 0.2 molar solutions of NaOH respectively. In the two experiments, t1/2 of the two reactions were the same. The most likely structure of halide is

Options:
A CH3CH2CH2CH2Cl
B CH3CH(Cl)CH2CH3
C (CH3)2CHCH2Cl
D (CH3)3CCl

The correct answer is:
(CH3)3CCl

Solution:
As it is independent of the concentration of NaOH. So, it undergoes via SN1 . So, most likely the halide is tertiary halide. So option D is correct.

Topic: Chemistry, Haloalkanes and Haloarenes, NEET
In Ulothrix, meiosis takes place in

Options:
A Cell of the filament
B Holdfast
C Zygote
D Zoospore

The correct answer is:
Zygote

Solution:
Ulothrix is green algae which shows a haplontic life cycle, in which zygote is the only diploid structure and it undergoes meiosis to restore the haploid condition.

Topic: Biology, Plant Kingdom, NEET
In unilocular ovary with a single ovule, the placentation is

Options:
A marginal
B basal
C free central
D axile

The correct answer is:
basal

Solution:
In basal placentation, ovary is bicarpellary, syncarpous and unilocular and a single ovule is borne at the base of ovary, eg, marigold.
In marginal placentation, the ovary is simple, unilocular and the ovules are arranged along the margin of the unilocular ovary, eg, pea.
In free central placentation, ovary is unilocular and the placenta bearing ovules are arised from the central axis, eg, Stellaria.
In axile placentation, ovary is two or more chambered, usually as many as the number of carpels, eg, Petunia.

Topic: Biology, Morphology of Flowering Plants, NEET, NEET 2010 (Screening)
In Uranium Z=92, the K absorption edge is 0.107 Å and the Kα line is 0.126 Å. The wavelength of the L absorption edge is

Options:
A 0.7 Ã
B 1 Å
C 2 Å
D 3.2 Å

The correct answer is:
0.7 Ã

Solution:
Energy of K absorption edge is
EK=hcÎ»K=12.40.107=115.9 keV ,
Energy of KÎ± line is
EKa=EK-EL =hcÎ»a=12.40.126=98.4 keV
Therefore energy of L absorption edge is
L EL=(EK)-E(Ka)=115.9-98.4
L EL=17.5 keV
The wavelength of the L absorption edge is
Î»L=hcEL=12.4 keVÃ17.5 keV=0.709 Ã

Topic: Physics, Atomic Physics, NEET
In ureotelic animals, which one pair of the following wastes are removed from the blood?

Options:
A

Ammonia and urea

B

Urea and sodium salts

C

CO2 and ammonia

D

CO2 and urea

The correct answer is:

CO2 and ammonia

Solution:
In ureotelic animals urea is formed from ammonia by the Ornithine cycle:

C O 2 + 2N H 3 ammonia â CO (N H 2 ) 2 Urea + H 2 O

Topic: Biology, Excretory Products and their Elimination, NEET
In Valence Bond Theory (VBT), what are the hybridized orbitals of the metal allowed to do with ligand orbitals?

Options:
A They cannot overlap with ligand orbitals.
B They can overlap with ligand orbitals, resulting in electron-pair donation.
C They can form ionic bonds with ligand orbitals.
D They can form covalent bonds with ligand orbitals.

The correct answer is:
They can overlap with ligand orbitals, resulting in electron-pair donation.

Solution:
According to VBT, hybridized orbitals of the metal can overlap with ligand orbitals, allowing for electron-pair donation and covalent bonding.

Topic: Chemistry, Coordination Compounds, NEET
In van der Waals equation of state for a real gas, the term that accounts for intermolecular forces is

Options:
A Vm - b
B P + a V m 2
C RT
D 1/RT

The correct answer is:
P + a V m 2

Solution:
Pressure correction factor accounts for intermolecular forces.
P+ na v m 2 v m −nb =nRT
if n = 1 P+ a v m 2 is responsible for intermolecular forces

Topic: Chemistry, States of Matter, NEET
In van der Waal's equation of state of the gas law, the constant ‘b’ is a measure of

Options:
A intermolecular attraction
B intermolecular repulsions
C intermolecular collision per unit volume
D volume occupied by the molecules

The correct answer is:
volume occupied by the molecules

Solution:
Van der Waal's equation for one mol of a gas is given as
P+aV2V-b=RT
Where b is volume correction. It arises due to finite size of gaseous molecules.The constant ‘b’ is a measure of volume occupied by the molecules. It is actually four times of molar volume of gas molecule.

Topic: Chemistry, States of Matter, NEET
In vitro clonal propagation in plants is characterized by:

Options:
A PCR and RAPD
B Northern blotting
C Electrophoresis and HPLC
D Microscopy

The correct answer is:
PCR and RAPD

Solution:
The characterization of the plants through their genomic variation is done by the RAPD (Randomly amplified polymorphic DNA) technique which uses PCR (Polymerase chain reaction) for the random amplification of DNA.

Topic: Biology, Strategies for Enhancement in Food Production, NEET, NEET 2014
In vitro fertilization is a technique that involves transfer of which one of the following into the Fallopian tube?

Options:
A Embryo only, upto 8 cell stage
B Either zygote or early embryo upto 8 cell stage
C Embryo of 32 cell stage
D Zygote only

The correct answer is:
Either zygote or early embryo upto 8 cell stage

Solution:
In vitro fertilization (IVF) or test-tube baby technique involves fertilizing one or more eggs outside the body and then transferring the fertilized eggs known as pre-embryos back into the uterus. Zygote Intra Fallopian Transfer (ZIFT) is an example of IVF. In this, the zygote or early embryos upto 8 blastomeres are transferred into the Fallopian tube. If the embryo has more than 8 blastomeres then it is transferred into uterus called as IUT.

Topic: Biology, Reproductive Health, NEET, NEET 2010 (Screening)
In water hyacinth and water lily, pollination takes place by:

Options:
A Water currents only
B Wind and water
C Insects and water
D Insects or wind

The correct answer is:
Insects or wind

Solution:
Pollination by water is quite rare in flowering plants and is limited to about 30 genera, mostly monocots, e.g. fresh water plants like Vallisneria, Hydrilla, marine water plant like Zostera (sea grass). In a majority of aquatic plants, the flowers emerge above the level of water and are pollinated by insects or wind e.g. Water hyacinth and water lily are pollinated by insects.

Topic: Biology, Sexual Reproduction in Flowering Plants, NEET, NEET 2020 (Phase 1)
In water saturated air the mole fraction of water vapour is 0.02 . If the total pressure of the saturated air is $1.2 \mathrm{~atm}$, the partial pressure of dry air is

Options:
A $1.18 \mathrm{~atm}$
B $1.76 \mathrm{~atm}$
C $1.176 \mathrm{~atm}$
D $0.98 \mathrm{~atm}$

The correct answer is:
$1.176 \mathrm{~atm}$

Solution:
Partial pressure of dry air $=$ total pressure $\times$ mole fraction of dry air
$$
\begin{array}{ll}
\Rightarrow \quad \mathrm{p}_{\text {dry air }} & =\mathrm{p}_{\text {total }} \times \lambda_{\text {dry air }} \\
\text { Given, } \lambda_{\text {saturated air }} & =0.02 \\
\lambda_{\text {dry air }} & =1-0.02=0.98 \\
\mathrm{p}_{\text {total }} & =1.2 \mathrm{~atm} \\
\therefore \quad \mathrm{p}_{\text {dry air }} & =1.2 \mathrm{~atm} \times 0.98=1.176 \mathrm{~atm}
\end{array}
$$

Topic: Chemistry, Solutions, NEET, NEET 2019 (Odisha)
In what application are hydrated zeolites commonly used?

Options:
A As construction materials
B In the production of glass
C As ion exchangers in softening of "hard" water
D In the manufacturing of ceramics

The correct answer is:
As ion exchangers in softening of "hard" water

Solution:
Hydrated zeolites are used as ion exchangers in the softening of hard water.

Topic: Chemistry, p Block Elements (Group 13 & 14), NEET
In what applications is Dacron fibre (terylene) commonly used?

Options:
A As an electrical insulator
B As a water-soluble polymer
C Blended with cotton and wool fibres
D In the production of safety helmets

The correct answer is:
Blended with cotton and wool fibres

Solution:
Dacron fibre (terylene) is often used by blending it with cotton and wool fibres to enhance certain properties in textiles.

Topic: Chemistry, Polymers, NEET
In what capacity are coordination compounds used in textile dyeing?

Options:
A As bleaching agents
B As catalysts
C As dyes
D As preservatives

The correct answer is:
As dyes

Solution:
The paragraph mentions that coordination compounds are used in textile dyeing, indicating their role as dyes.

Topic: Chemistry, Coordination Compounds, NEET
In what cases is stating the total number not an appropriate measure of population density?

Options:
A When counting the population is impossible or Time Taken:consuming
B When the population density is low
C When the population density is high
D When the per cent cover or biomass is a more meaningful measure

The correct answer is:
When counting the population is impossible or Time Taken:consuming

Solution:
Total number is not an appropriate measure of population density when counting the population is impossible or Time Taken:consuming.

Topic: Biology, Organisms and Populations, NEET
In what circumstances would a catalyst be of little help in a reaction?

Options:
A When the reaction is very slow.
B When the equilibrium constant is small.
C When the temperature is high.
D When the reactants are in a gaseous state.

The correct answer is:
When the equilibrium constant is small.

Solution:
If a reaction has an exceedingly small K, a catalyst would be of little help.

Topic: Chemistry, Chemical Equilibrium, NEET
In what combined form does hydrogen constitute 15.4% of the earth's crust and the oceans?

Options:
A Hydrides
B Water
C Carbohydrates
D Proteins

The correct answer is:
Water

Solution:
The paragraph mentions that hydrogen constitutes 15.4% of the earth's crust and the oceans in the combined form, primarily in water.

Topic: Chemistry, Hydrogen, NEET
In what condition do metals often occur?

Options:
A Amorphous condition
B Crystalline condition
C Polycrystalline condition
D Isotropic condition

The correct answer is:
Polycrystalline condition

Solution:
Metals often occur in polycrystalline condition, as stated in the paragraph.

Topic: Chemistry, Solid State, NEET
In what conditions are the partial pressures of gases calculated according to Dalton's law?

Options:
A At varying temperatures
B At varying volumes
C At constant temperature and volume
D At constant pressure and volume

The correct answer is:
At constant temperature and volume

Solution:
According to Dalton's law, the partial pressures of gases are calculated at constant temperature and volume.

Topic: Chemistry, States of Matter, NEET
In what conditions do nearly all intermediate oxidation states of phosphorus disproportionate?

Options:
A Alkali
B Acid
C Both alkali and acid
D Neither alkali nor acid

The correct answer is:
Both alkali and acid

Solution:
The paragraph states that nearly all intermediate oxidation states of phosphorus disproportionate into +5 and -3 in both alkali and acid.

Topic: Chemistry, p Block Elements (Group 15, 16, 17 & 18), NEET
In what conditions do the laws of thermodynamics apply?

Options:
A When a system is in motion
B When a system is undergoing a chemical reaction
C When a system is in equilibrium or moves from one equilibrium state to another
D When a system contains only a few molecules

The correct answer is:
When a system is in equilibrium or moves from one equilibrium state to another

Solution:
The laws of thermodynamics apply when a system is in equilibrium or transitions between equilibrium states.

Topic: Chemistry, Thermodynamics (C), NEET
In what context is the quantitative evolution of nitrogen gas used as an estimation method?

Options:
A Estimation of aliphatic diazonium salts
B Estimation of amino acids and proteins
C Estimation of aromatic diazonium salts
D Estimation of alcohols

The correct answer is:
Estimation of amino acids and proteins

Solution:
The quantitative evolution of nitrogen gas is used in the estimation of amino acids and proteins.

Topic: Chemistry, Amines, NEET
In what direction is the gradient present for CO₂ in the body?

Options:
A From blood to alveoli
B From alveoli to blood
C From tissues to alveoli
D From alveoli to tissues

The correct answer is:
From blood to alveoli

Solution:
A gradient is present for CO₂ in the body in the opposite direction, i.e., from blood to alveoli.

Topic: Biology, Breathing and Exchange of Gases, NEET
In what form are thin films of polyacetylene commonly used as electrodes in batteries?

Options:
A Powder
B Sheets
C Rods
D Granules

The correct answer is:
Sheets

Solution:
Thin films of polyacetylene are typically used as electrode materials in the form of sheets.

Topic: Chemistry, Hydrocarbons, NEET
In what form does hydrogen primarily exist in the earth's crust and the oceans?

Options:
A As hydrides
B As carbohydrates
C As proteins
D As hydrocarbons

The correct answer is:
As hydrides

Solution:
The paragraph suggests that hydrogen primarily exists in the earth's crust and the oceans in the form of hydrides.

Topic: Chemistry, Hydrogen, NEET
In what form is deuterium mostly found in terrestrial hydrogen?

Options:
A D2
B HT
C HD
D HT2

The correct answer is:
HD

Solution:
The paragraph suggests that deuterium is mostly found in the form of HD in terrestrial hydrogen.

Topic: Chemistry, Hydrogen, NEET
In what form is liquid SO2 used as a solvent for dissolving chemicals?

Options:
A Solvent for oils
B Solvent for organic chemicals
C Solvent for inorganic chemicals
D Solvent for metals

The correct answer is:
Solvent for organic chemicals

Solution:
Liquid SO2 is used as a solvent for dissolving organic chemicals. This characteristic makes it useful in various chemical processes where organic compounds need to be dissolved.

Topic: Chemistry, p Block Elements (Group 15, 16, 17 & 18), NEET
In what form is phosphorus found in bones and living cells?

Options:
A Sodium phosphate
B Phosphoproteins
C Elemental phosphorus
D Sodium nitrate

The correct answer is:
Phosphoproteins

Solution:
Phosphorus is found in bones and living cells in the form of phosphoproteins.

Topic: Chemistry, p Block Elements (Group 15, 16, 17 & 18), NEET
In what forms are the unstable oxoacids of sulphur known?

Options:
A As pure, isolated compounds
B In solid state
C In the form of their salts or in aqueous solution
D As crystals

The correct answer is:
In the form of their salts or in aqueous solution

Solution:
The passage states that the unstable oxoacids of sulphur are known in the form of their salts or in aqueous solution. They cannot be isolated as pure, isolated compounds.

Topic: Chemistry, p Block Elements (Group 15, 16, 17 & 18), NEET
In what forms is carbon available in its elemental state?

Options:
A Coal, graphite, and diamond
B Carbonates, hydrocarbons, and carbon dioxide gas
C Silica and silicates
D Cassiterite and galena

The correct answer is:
Coal, graphite, and diamond

Solution:
In its elemental state, carbon is available as "coal, graphite, and diamond."

Topic: Chemistry, p Block Elements (Group 13 & 14), NEET
In what important processes of life do aldehydes, ketones, and carboxylic acids play a significant role?

Options:
A Photosynthesis
B Respiration
C Reproduction
D Digestion

The correct answer is:
Respiration

Solution:
Aldehydes, ketones, and carboxylic acids play a significant role in the process of respiration.

Topic: Chemistry, Aldehydes, Ketones and Carboxylic Acids, NEET
In what industrial process is molybdenum used as a promoter for iron?

Options:
A Oil refining
B Ammonia synthesis
C Hydrogenation of oils
D Froth floatation process

The correct answer is:
Ammonia synthesis

Solution:
The paragraph specifies that molybdenum acts as a promoter for iron in Haber's process, which is used for the synthesis of ammonia.

Topic: Chemistry, Surface Chemistry, NEET
In what industrial process is ozone commonly utilized as an oxidizing agent?

Options:
A Production of steel
B Synthesis of synthetic rubber
C Manufacture of potassium permanganate
D Petroleum refining

The correct answer is:
Manufacture of potassium permanganate

Solution:
The passage states that ozone acts as an oxidizing agent in the manufacture of potassium permanganate.

Topic: Chemistry, p Block Elements (Group 15, 16, 17 & 18), NEET
In what industry are large quantities of toxic wastes commonly generated?

Options:
A Tourism
B Healthcare
C Education
D Agriculture

The correct answer is:
Healthcare

Solution:
Large quantities of toxic wastes are commonly generated in the healthcare industry due to the use of hazardous materials in medical procedures and research.

Topic: Chemistry, Environmental Chemistry, NEET
In what manner is the long form of the periodic table better than Mendeleev’s periodic table?

Options:
A The long form is based on atomic numbers, providing a more accurate arrangement of elements.
B The long form includes all known elements and accommodates the placement of undiscovered elements.
C The long form successfully predicts the existence of isotopes and explains the anomalies in element placement.
D The long form offers a more comprehensive understanding of the electronic configuration and chemical behaviour of elements.

The correct answer is:
The long form is based on atomic numbers, providing a more accurate arrangement of elements.

Solution:
Correct Option is : (A)
The long form is based on atomic numbers, providing a more accurate arrangement of elements.

Topic: Chemistry, Classification of Elements and Periodicity in Properties, NEET
In what molecule must all the atoms be in the same plane for π bond formation?

Options:
A H2O
B NH3
C H2C=CH2
D CH4

The correct answer is:
H2C=CH2

Solution:
In the H2C=CH2 molecule, all the atoms must be in the same plane for π bond formation.

Topic: Chemistry, General Organic Chemistry, NEET
In what order are ligands listed when writing the formula for mononuclear coordination entities?

Options:
A In order of charge
B In order of size
C In alphabetical order
D In random order

The correct answer is:
In alphabetical order

Solution:
Ligands are listed in alphabetical order when writing the formula for mononuclear coordination entities.

Topic: Chemistry, Coordination Compounds, NEET
In what order do the substituents appear in the name of a benzene compound?

Options:
A In order of decreasing atomic number
B In alphabetical order
C In order of increasing atomic number
D In the order they were added to the compound

The correct answer is:
In alphabetical order

Solution:
The substituents appear in the name in alphabetical order.

Topic: Chemistry, General Organic Chemistry, NEET
In what organisms does cell division itself act as a mode of reproduction?

Options:
A Plants and animals with complex organizations
B Multicellular organisms
C Protists and Monerans
D Single-celled organisms

The correct answer is:
Protists and Monerans

Solution:
In Protists and Monerans, the organism or the parent cell divides by mitosis into two to give rise to new individuals, thus making cell division itself a mode of reproduction.

Topic: Biology, Reproduction in Organisms, NEET
In what pH range do buffer solutions typically operate effectively?

Options:
A A wide range of pH values
B A strongly acidic range
C A strongly alkaline range
D A specific pH range

The correct answer is:
A specific pH range

Solution:
The paragraph suggests that buffer solutions are designed to operate within a specific pH range.

Topic: Chemistry, Ionic Equilibrium, NEET