datavorous/entrance-exam-dataset huggingface dataset:
Dikaryophase is commonly seen in members of:

Options:
A Ascomycetes and Phycomycetes.
B Ascomycetes and Basidiomycetes.
C Phycomycetes and Basidiomycetes.
D Basidiomycetes and Deuteromycetes.

The correct answer is:
Ascomycetes and Basidiomycetes.

Solution:
Dikaryophase is an intervening stage in the sexual reproduction cycle of certain fungi (especially, the members of the group Basidiomycetes and Ascomycetes). When two fungal hyphae fuse together, but the nuclei do not fuse immediately, it results in the formation of a dikaryon (n+n).

Topic: Biology, Biological Classification, NEET
Dikaryophase is observed in:

Options:
A Ascomycetes
B Phycomycetes
C Basidiomycetes
D Both (a) and (c)

The correct answer is:
Both (a) and (c)

Solution:
In other fungi (ascomycetes and basidiomycetes), an intervening dikaryotic stage (n + n, i.e., two nuclei per cell) occurs; such a condition is called a dikaryon and the phase is called dikaryophase of fungus.

Topic: Biology, Biological Classification, NEET
→ Δ dil.KOH A Product A is

Options:
A
B
C
D

The correct answer is:

Solution:
It is a case aldol condensation reaction

Topic: Chemistry, Aldehydes and Ketones, NEET
Dimensional formula of ab satisfying P=a-t2bx where P is pressure, x is distance and t is time will be

Options:
A ML1T-1
B M2LT-1
C ML0T-2
D M0L-1

The correct answer is:
ML0T-2

Solution:
P=a-t2bx=abx-t2bx
By the principle of homogeneity.
[P]= force area =ab[x]
ML-1T-2=ab1L⇒ab=MT-2

Topic: Physics, Units and Dimensions, NEET
Dimensional formula of the physical quantity, resistance is

Options:
A ML2T-3A-2
B ML-1T3A-1
C ML2T-2K-1
D ML-2T-3A2

The correct answer is:
ML2T-3A-2

Solution:
According to Ohm's law,
V=IR
â´ R=VI
But V=Wq
=WIt âµq=It
â´R=W/ItI
=WI2t
Hence, R=WI2t=ML2T-2A2T
=ML2T-3A-2

Topic: Physics, Units and Dimensions, NEET
Dimensions of resistance in an electrical circuit, in terms of dimension of mass $M$, of length $L$, of time $T$ and of current $I$, would be

Options:
A $M L^2 T^{-2}$
B $M L^2 T^{-1} I^{-1}$
C $M L^2 T^{-3} I^{-2}$
D $M L^2 T^{-3} I^{-1}$

The correct answer is:
$M L^2 T^{-3} I^{-2}$

Solution:
We know that
$\begin{aligned}
R & =\frac{V}{I}=\frac{\left[M L^2 T^{-2}\right]}{\left[I^2 T\right]} \\
& =\left[M L^2 T^{-3} I^{-2}\right]
\end{aligned}$

Topic: Physics, Units and Dimensions, NEET, NEET 2007
Dimensions of stress are:

Options:
A ML2T−2
B ML0T−2
C ML−1T−2
D MLT−2

The correct answer is:
ML−1T−2

Solution:
stress = Force Area

=M1L1T-2L2

stress =M1L-1T-2

Topic: Physics, Units and Dimensions, NEET, NEET 2020 (Phase 1)
Dimethyl gyoxime forms a square planar complex with Ni2+ . This complex should be

Options:
A diamagnetic
B paramagnetic having 1 unpaired electron
C paramagnetic having 2 unpaired electrons
D ferromagnetic

The correct answer is:
diamagnetic

Solution:
Dimethyl gyoxime forms a square planar complex with Ni2+ . This complex will be diamagnetic as there is no unpaired electron on central atom.

Topic: Chemistry, Coordination Compounds, NEET
Dinitrogen and dihydrogen react with each other to produce ammonia according to the following chemical equation: N2(g) + H2(g) → 2NH3(g) What is the mass of ammonia produced if 2.00 × 103g of dinitrogen reacts with 1.00 ×103g of dihydrogen?

Options:
A 2428g
B 2546g
C 2254g
D 2658g

The correct answer is:
2428g

Solution:
Correct Option is : (A)
2428g

Topic: Chemistry, Some Basic Concepts of Chemistry, NEET
Dinosaurs dominated the world in which of the following geological eras?

Options:
A Cenozoic
B Jurassic
C Mesozoic
D Devonian

The correct answer is:
Jurassic

Solution:
Dinosaurs dominated in Jurassic period of Mesozoic era and were extinct by cretaceous period.
Related Theory
Geological Time Scale

Topic: Biology, Evolution, NEET, NEET 2013 (Karnataka)
Dinosaurs were originated, became dominant and became extinct during

Options:
A Ordovician, Jurassic and Carboniferous period
B Triassic, Cretaceous and Jurassic period
C Cretaceous, Carboniferous, Jurassic period
D Triassic, Jurassic and Cretaceous period

The correct answer is:
Triassic, Jurassic and Cretaceous period

Solution:
During the Mesozoic era, the dinosaurs originated in the Triassic period, flourished in the Jurassic period, and became extinct in the cretaceous period.

Topic: Biology, Evolution, NEET
Diphenyls are a potential threat to the environment. How are these produced from aryl halides?

Options:
A Diphenyls are synthesized by nucleophilic substitution of aryl halides.
B Diphenyls are synthesized by electrophilic addition of aryl halides.
C Aryl halides, when treated with sodium in the presence of dry ether, gives diphenyl. This reaction is called a Fitting reaction.
D Diphenyls are synthesized by Grignard reactions with aryl halides.

The correct answer is:
Aryl halides, when treated with sodium in the presence of dry ether, gives diphenyl. This reaction is called a Fitting reaction.

Solution:
Correct Option is : (C)
Aryl halides, when treated with sodium in the presence of dry ether, gives diphenyl. This reaction is called a Fitting reaction.

Topic: Chemistry, Haloalkanes and Haloarenes, NEET
Diploblastic animal with radial symmetry is

Options:
A Roundworm
B Earthworm
C Liver fluke
D Hydra

The correct answer is:
Hydra

Solution:
Diploblasty is a condition of the blastula in which there are two primary germ layers: the ectoderm and endoderm. They do not show the mesodermal layer.

Roundworms, earthworms and liver fluke have bilateral symmetry. These are elongated worm-like organisms.
Hydra is radially-symmetrical. The body of the organism can be divided into equal halves in any plane of the axis. The tentacles radiate outward around the mouth. These type of arrangement of the tentacles gives the organisms a radial form of symmetry.

Topic: Biology, Animal Kingdom, NEET
Diploid spores are produced only by

Options:
A Mosses
B Rust causing fungi
C Gymnosperms
D Angiosperms

The correct answer is:
Rust causing fungi

Solution:
Rust causing fungi such as Puccinia produce diploid spore-like teleutospores in its life cycle. Telutospore is a thick-walled perennating spore produced by Puccinia in its primary host wheat. This spore can survive for long duration in soil and germinate to form basidia which produce haploid basidiospores by meiosis.

Topic: Biology, Reproduction in Organisms, NEET
Diplontic life cycle is seen in ________.

Options:
A Funaria.
B Equisetum.
C Fucus.
D Adiantum.

The correct answer is:
Fucus.

Solution:
Plants, depending on their types, show alternation of generations. In one type, the diploid sporophyte is the dominant, photosynthetic, independent phase of the plant. The gametophytic stage is represented by the single-celled to few celled haploid gametophytes. This kind of life cycle is termed as diplontic. An alga, Fucus sp., represents this pattern.

Topic: Biology, Plant Kingdom, NEET
Dipole moment of phenol is smaller than that of methanol. Why?

Options:
A Phenol has a larger molecular size than methanol, leading to a smaller dipole moment.
B Phenol and methanol have identical dipole moments.
C Phenol has a symmetrical molecular structure, resulting in cancellation of dipole moments.
D In phenol, C—O bond is less polar due to electron-withdrawing effect of benzene ring whereas in methanol, C—O bond is more polar due to electron releasing effect of —CH3group

The correct answer is:
In phenol, C—O bond is less polar due to electron-withdrawing effect of benzene ring whereas in methanol, C—O bond is more polar due to electron releasing effect of —CH3group

Solution:
Correct Option is : (D)
In phenol, C—O bond is less polar due to electron-withdrawing effect of benzene ring whereas in methanol, C—O bond is more polar due to electron releasing effect of —CH3group

Topic: Chemistry, Alcohols Phenols and Ethers, NEET
Dipole-induced dipole interaction are present in which of the following pairs?

Options:
A H2O and alcohol
B Cl2 and CCl4
C HCl and He-atoms
D SiF4 and He-atoms

The correct answer is:
HCl and He-atoms

Solution:
Dipole-induced dipole interaction are present in HCl and He-atoms as follows
H2O and alcohol have hydrogen bonding (dipole- dipole type interactions).In rest two pairs no polarity is there so induced dipole-induced dipole interactions are possible.

Topic: Chemistry, Chemical Bonding and Molecular Structure, NEET
Dipole-induced dipole interactions are present in which of the following pairs?

Options:
A $\mathrm{H}_2 \mathrm{O}$ and alcohol
B $\mathrm{Cl}_2$ and $\mathrm{CCl}_4$
C $\mathrm{HCl}$ and $\mathrm{He}$ atoms
D $\mathrm{SiF}_4$ and $\mathrm{He}$ atoms

The correct answer is:
$\mathrm{HCl}$ and $\mathrm{He}$ atoms

Solution:
Dipole-induced dipole interaction are present in the pair in which the first species is polar and the other is non-polar.
$\mathrm{H}_2 \mathrm{O}$ and alcohol both are polar molecules, so there exists dipole-dipole interactions in between them.
$\mathrm{Cl}_2$ and $\mathrm{CCl}_4$ both are non-polar so there exists induced dipole-induced dipole interactions in between them. Similar is true for $\mathrm{SiCl}_4$ and $\mathrm{He}$ atoms pair.
$\mathrm{HCl}$ is a polar molecule, whereas $\mathrm{He}$ atoms are non-polar, so in between them dipole-induced dipole interactions exist :

Topic: Chemistry, Chemical Bonding and Molecular Structure, NEET, NEET 2013 (All India)
Diprotic compound among the following are

Options:
A H3PO3
B H3PO2
C HClO3
D HPO3

The correct answer is:
H3PO3

Solution:
Diprotic compounds give 2H+ ions in solution on ionisation.

Topic: Chemistry, p Block Elements (Group 15, 16, 17 & 18), NEET
Discontinuous synthesis of DNA occurs in one strand, because:

Options:
A DNA molecule being synthesised is very long
B DNA dependent DNA polymerase catalyses polymerisation only in one direction (5’ → 3’)
C it is a more efficient process
D DNA ligase joins the short stretches of DNA

The correct answer is:
DNA dependent DNA polymerase catalyses polymerisation only in one direction (5’ → 3’)

Solution:
DNA dependent DNA polymerase catalyses polymerisation only in one direction (5’ → 3’) thus the other stand in opposite direction undergoes discontinuous synthesis.

Topic: Biology, Molecular Basis of Inheritance, NEET
Discuss briefly de-mineralisation of water by ion exchange resin.

Options:
A De-mineralisation is the process of removing organic impurities from water using ion exchange resins.
B De-mineralisation is the process of removing mineral salts from water using ion exchange resins.
C De-mineralisation is the process of adding minerals to water using ion exchange resins.
D De-mineralisation is the process of converting water into mineral water using ion exchange resins.

The correct answer is:
De-mineralisation is the process of removing mineral salts from water using ion exchange resins.

Solution:
Correct Option is : (B)
De-mineralisation is the process of removing mineral salts from water using ion exchange resins.

Topic: Chemistry, Hydrogen, NEET
Discuss the effect of pressure and temperature on the adsorption of gases on solids.

Options:
A Pressure increases adsorption, while temperature decreases adsorption.
B Pressure decreases adsorption, while temperature increases adsorption.
C Both pressure and temperature increase adsorption.
D Pressure and temperature have no effect on adsorption.

The correct answer is:
Both pressure and temperature increase adsorption.

Solution:
Correct Option is : (C)
Both pressure and temperature increase adsorption.

Topic: Chemistry, Surface Chemistry, NEET
Discuss the general characteristics and gradation in properties of alkaline earth metals.

Options:
A Alkali earth metals are highly reactive and readily form covalent compounds with non-metals. Their reactivity increases down the group.
B Alkaline earth metals have a single valence electron, which they readily gain to form negatively charged ions. Their ionization energy decreases down the group.
C Alkaline earth metals are silvery-white metals with low density. They are highly reactive, readily lose electrons, and form stable ionic compounds. Their reactivity and atomic size increase down the group.
D Alkaline earth metals have high melting and boiling points compared to most other metals. Their reactivity decreases down the group due to an increase in ionization energy.

The correct answer is:
Alkaline earth metals are silvery-white metals with low density. They are highly reactive, readily lose electrons, and form stable ionic compounds. Their reactivity and atomic size increase down the group.

Solution:
Correct Option is : (C)
Alkaline earth metals are silvery-white metals with low density. They are highly reactive, readily lose electrons, and form stable ionic compounds. Their reactivity and atomic size increase down the group.

Topic: Chemistry, s Block Elements, NEET
Discuss the general characteristics of Group 15 elements with reference to their electronic configuration, oxidation state, atomic size, ionization enthalpy, and electronegativity.

Options:
A They have a tendency to form +3 oxidation states.
B They are generally smaller in size compared to the elements of Group 14.
C They have higher ionization enthalpies compared to Group 14 elements.
D They have a higher tendency to gain electrons.

The correct answer is:
They are generally smaller in size compared to the elements of Group 14.

Solution:
Correct Option is : (B)
They are generally smaller in size compared to the elements of Group 14.

Topic: Chemistry, p Block Elements (Group 13 & 14), NEET
Discuss the molecular shape of BrF3on the basis of VSEPR theory.

Options:
A Tetrahedral
B Trigonal Bipyramidal
C T-Shaped
D Linear

The correct answer is:
T-Shaped

Solution:
Correct Option is : (C)
T-Shaped

Topic: Chemistry, p Block Elements (Group 13 & 14), NEET
Discuss the nature of the C–X bond in the haloarenes.

Options:
A The C–X bond in haloarenes is polar covalent, with carbon being more electronegative than halogen.
B The C–X bond in haloarenes is purely covalent, with no polarity.
C The C–X bond in haloarenes is ionic, with halogen being more electronegative than carbon.
D The nature of the C–X bond in haloarenes varies depending on the specific halogen used.

The correct answer is:
The C–X bond in haloarenes is polar covalent, with carbon being more electronegative than halogen.

Solution:
Correct Option is : (A)
The C–X bond in haloarenes is polar covalent, with carbon being more electronegative than halogen.

Topic: Chemistry, Haloalkanes and Haloarenes, NEET
Discuss the role of Lewis acids in the preparation of aryl bromides and chlorides in the dark.

Options:
A Lewis acids facilitate the formation of highly reactive carbocations, which react with bromine or chlorine in the dark to replace hydrogen atoms in aromatic compounds.
B Lewis acids stabilize the negative charge on bromine or chlorine ions, making them more reactive toward aromatic compounds in the dark.
C Lewis acids generate free radicals, which initiate bromination or chlorination reactions in the dark.
D Lewis’s acids are electron-deficient species. They are responsible for inducing heterolytic fission in halogen molecules. The role of Lewis acid is to produce an electrophile, The electrophile produce will attack electron-rich benzene ring to produce aryl bromides and chlorides

The correct answer is:
Lewis’s acids are electron-deficient species. They are responsible for inducing heterolytic fission in halogen molecules. The role of Lewis acid is to produce an electrophile, The electrophile produce will attack electron-rich benzene ring to produce aryl bromides and chlorides

Solution:
Correct Option is : (D)
Lewis’s acids are electron-deficient species. They are responsible for inducing heterolytic fission in halogen molecules. The role of Lewis acid is to produce an electrophile, The electrophile produce will attack electron-rich benzene ring to produce aryl bromides and chlorides

Topic: Chemistry, Haloalkanes and Haloarenes, NEET
Discuss the shape of AsF5using the VSEPR model.

Options:
A AsF5has a trigonal bipyramidal shape with bond angles of 90 degrees and 120 degrees.
B AsF5has a tetrahedral shape with bond angles of approximately 109.5 degrees.
C AsF5has a square pyramidal shape with bond angles of approximately 90 degrees.
D AsF5has a linear shape with a bond angle of 180 degrees.

The correct answer is:
AsF5has a trigonal bipyramidal shape with bond angles of 90 degrees and 120 degrees.

Solution:
Correct Option is : (A)
AsF5has a trigonal bipyramidal shape with bond angles of 90 degrees and 120 degrees.

Topic: Chemistry, Chemical Bonding and Molecular Structure, NEET
Discuss the shape of BCl3using the VSEPR model.

Options:
A BCl3has a linear shape with a bond angle of 180 degrees.
B BCl3has a trigonal planar shape with a bond angle of 120 degrees.
C BCl3has a bent or V-shaped geometry with a bond angle of less than 109.5 degrees.
D BCl3has a trigonal pyramidal shape with a bond angle of approximately 109.5 degrees.

The correct answer is:
BCl3has a trigonal planar shape with a bond angle of 120 degrees.

Solution:
Correct Option is : (B)
BCl3has a trigonal planar shape with a bond angle of 120 degrees.

Topic: Chemistry, Chemical Bonding and Molecular Structure, NEET
Discuss the shape of BeCl2using the VSEPR model.

Options:
A BeCl2has a linear shape with a bond angle of 180 degrees.
B BeCl2has a trigonal planar shape with a bond angle of 120 degrees.
C BeCl2has a bent or V-shaped geometry with a bond angle of less than 109.5 degrees.
D BeCl2has a tetrahedral shape with a bond angle of 109.5 degrees.

The correct answer is:
BeCl2has a linear shape with a bond angle of 180 degrees.

Solution:
Correct Option is : (A)
BeCl2has a linear shape with a bond angle of 180 degrees.

Topic: Chemistry, Chemical Bonding and Molecular Structure, NEET
Discuss the shape of H2S using the VSEPR model.

Options:
A H2S has a linear shape with a bond angle of 180 degrees.
B H2S has a bent or V-shaped geometry with a bond angle of approximately 104.5 degrees.
C H2S has a trigonal planar shape with bond angles of 120 degrees.
D H2S has a tetrahedral shape with bond angles of approximately 109.5 degrees.

The correct answer is:
H2S has a bent or V-shaped geometry with a bond angle of approximately 104.5 degrees.

Solution:
Correct Option is : (B)
H2S has a bent or V-shaped geometry with a bond angle of approximately 104.5 degrees.

Topic: Chemistry, Chemical Bonding and Molecular Structure, NEET
Discuss the shape of PH3using the VSEPR model.

Options:
A PH3has a linear shape with a bond angle of 180 degrees.
B PH3has a trigonal planar shape with bond angles of 120 degrees.
C PH3has a tetrahedral shape with bond angles of approximately 109.5 degrees.
D PH3has a trigonal pyramidal shape with bond angles of approximately 107 degrees.

The correct answer is:
PH3has a trigonal pyramidal shape with bond angles of approximately 107 degrees.

Solution:
Correct Option is : (D)
PH3has a trigonal pyramidal shape with bond angles of approximately 107 degrees.

Topic: Chemistry, Chemical Bonding and Molecular Structure, NEET
Discuss the shape of SiCl4using the VSEPR model.

Options:
A SiCl4has a linear shape with a bond angle of 180 degrees.
B SiCl4has a tetrahedral shape with a bond angle of approximately 109.5 degrees.
C SiCl4has a trigonal planar shape with a bond angle of 120 degrees.
D SiCl4has a bent or V-shaped geometry with a bond angle of less than 109.5 degrees.

The correct answer is:
SiCl4has a tetrahedral shape with a bond angle of approximately 109.5 degrees.

Solution:
Correct Option is : (B)
SiCl4has a tetrahedral shape with a bond angle of approximately 109.5 degrees.

Topic: Chemistry, Chemical Bonding and Molecular Structure, NEET
Discuss the various reactions that occur in the Solvay process.

Options:
A The Solvay process involves the conversion of sodium chloride into sodium carbonate through a series of reactions with ammonia and carbon dioxide.
B The Solvay process is a method for extracting sodium and chlorine from seawater.
C The Solvay process is a technique for synthesizing ammonia from sodium chloride and calcium carbonate.
D The Solvay process involves the conversion of calcium carbonate into sodium bicarbonate through a reaction with sulfuric acid.

The correct answer is:
The Solvay process involves the conversion of sodium chloride into sodium carbonate through a series of reactions with ammonia and carbon dioxide.

Solution:
Correct Option is : (A)
The Solvay process involves the conversion of sodium chloride into sodium carbonate through a series of reactions with ammonia and carbon dioxide.

Topic: Chemistry, s Block Elements, NEET
Disease caused by deficiency of phenylalanine hydroxylase enzyme is an example of

Options:
A multiple allelism.
B incomplete dominance.
C epistasis.
D pleiotropy.

The correct answer is:
pleiotropy.

Solution:
A single gene can exhibit multiple phenotypic expressions. Such a gene is called a pleiotropic gene. The underlying mechanism of pleiotropy in most cases is the effect of a gene on metabolic pathways which contribute towards different phenotypes. An example of this is the disease phenylketonuria, which occurs in humans. The disease is caused by mutation in the gene that codes for the enzyme phenyl alanine hydroxylase (single gene mutation). This manifests itself through phenotypic expression characterised by mental retardation and a reduction in hair and skin pigmentation.

Topic: Biology, Principles of Inheritance and Variation, NEET
Disease caused by the biting of Culex mosquito is

Options:
A Filariasis
B Dengue fever
C Yellow fever
D Pneumonia

The correct answer is:
Filariasis

Solution:
Filariasis or elephantiasis is caused by a nematode Wuchereria bancrofti which is transmitted through the bite of Culex fatigans mosquito. In this disease, there is huge enlargement of the diseased (affected) organ.

Topic: Biology, Human Health and Diseases, NEET
Disease caused by undersecretion of adrenal cortex

Options:
A Sterility
B Cretinism
C Cushing disease
D Addison's disease

The correct answer is:
Addison's disease

Solution:
The adrenal gland consists of an outer cortex and inner medulla. The outer cortex secretes glucocorticoids, mineralocorticoids, and sex corticoids. The adrenal medulla secretes adrenaline and noradrenaline. These hormones sometimes show hypersecretion or under secretion. Hypersecretion of adrenal cortex hormones results in Cushing's disease while hyposecretion results in Addison's disease. Addison's disease occurs when there is damage to the glandor cortisol and aldosterone is not secreted properly.

Topic: Biology, Chemical Coordination and Integration, NEET
Disease that supresses the immune system of the body is:

Options:
A AIDS
B Herpes
C Typhoid
D Chikungunya

The correct answer is:
AIDS

Solution:
AIDS destroy T lymphocytes of the body thus suppressing the immune system.

Topic: Biology, Human Health and Diseases, NEET
Diseases are broadly grouped into infectious and non-infectious diseases. In the list given below, identify infectious diseases. i. Cancer ii. Influenza iii. Allergy iv. Smallpox

Options:
A i and ii
B ii and iii
C iii and iv
D ii and iv

The correct answer is:
ii and iv

Solution:
Influenza and smallpox are spread through infectious viruses.

Topic: Biology, Human Health and Diseases, NEET
Diseases are broadly grouped into infectious and non-infectious types. In the list given below, identify infectious diseases.

(i) Cancer (ii) Influenza (iii) Allergy (iv) Small pox

Options:
A i and ii
B ii and iii
C iii and iv
D ii and iv.

The correct answer is:
ii and iv.

Solution:
Diseases can be broadly divided into infectious and non-infectious. Infectious diseases are easily transmitted from one person to another. They are very common and all of suffer from it sometime in our life. Some examples of infectious diseases are AIDS, influenza, small pox, chicken pox, pneumonia, etc. Examples of non infectious diseases are cancer, allergies, diabetes, hypertension, obesity, etc. Cancer is the major cause of death due to non infectious disease.

Topic: Biology, Human Health and Diseases, NEET