datavorous/entrance-exam-dataset huggingface dataset:
Which of the following noble gases directly reacts with dioxygen (O2)?

Options:
A Helium (He)
B Neon (Ne)
C Argon (Ar)
D Krypton (Kr)

The correct answer is:
Neon (Ne)

Solution:
The paragraph states that dioxygen directly reacts with nearly all metals and non-metals except some metals (e.g., Au, Pt) and some noble gases. Therefore, neon (Ne) directly reacts with dioxygen.

Topic: Chemistry, p Block Elements (Group 15, 16, 17 & 18), NEET
Which of the following nuclear reactions will generate an isotope?

Options:
A β-particle emission
B Neutron particle emission
C Position emission
D α-particle emission

The correct answer is:
Neutron particle emission

Solution:
The atoms of the some elements having same atomic number but different mass numbers are called isotopes.
Z A Î§ â¶ - Î± Z - 2 A - 4 Y ; Z A Î§ â¶ - Î² Z + 1 A Y
z A X â¶ - 1 n z A - 1 X ; z A X â¶ - B + z - 1 A Y

Topic: Chemistry, Chemical Kinetics, NEET
Which of the following nucleic acids is present in an organism having 70 S ribosomes only?

Options:
A Single-stranded DNA with protein coat
B Double-stranded circular naked DNA
C Double-stranded DNA enclosed in nuclear membrane
D Double-stranded circular DNA with histone proteins

The correct answer is:
Double-stranded circular naked DNA

Solution:
Double-stranded circular naked DNA type of nucleic acid is present in an organism having $70 \mathrm{~S}$ ribosomes.
These are present in prokaryotic organisms or cells. All prokaryotic cells have a single double-stranded (double helix), circular DNA molecule for their genetic material. This DNA is attached to the inner cell membrane where the DNA replicating machinery is located. The DNA is "naked", it does not have proteins associated with it as eukaryotic DNA does.

Topic: Biology, Cell - The Unit of Life, NEET, NEET 2019 (Odisha)
Which of the following objects will acquire a greater angular speed after a given time when torques of equal magnitude are applied to both objects, assuming they have the same mass and radius?

Options:
A The hollow cylinder
B The solid sphere
C Both will acquire the same angular speed
D It cannot be determined with the given information

The correct answer is:
The solid sphere

Solution:
Correct Option is : (B)
The solid sphere

Topic: Chemistry, Rotational Motion, NEET
Which of the following observation from the given graph is correct

Options:
A B has greater Young’s modulus than the material A
B Young’s modulus of A and B is equal
C Material A is stronger than B
D Material B is stronger than A

The correct answer is:
Material A is stronger than B

Solution:
Correct Option is : (C)
Material A is stronger than B

Topic: Chemistry, Mechanical Properties of Solids, NEET
Which of the following occurs due to the presence of autosome linked dominant trait?

Options:
A Myotonic dystrophy
B Haemophilia
C Thialessemia
D Sickle cell anaemia

The correct answer is:
Myotonic dystrophy

Solution:
Thalessemia and sickle cell anaemia are autosome linked recessive blood diseases.

Haemophilia is a sex-linked recessive disease.

Myotonic dystrophy is an autoomal dominant trait. Myotonic dystrophy is part of a group of inherited disorders called muscular dystrophies. It is the most common form of muscular dystrophy that begins in adulthood. Myotonic dystrophy is characterized by progressive muscle wasting and weakness.

Topic: Biology, Principles of Inheritance and Variation, NEET, NEET 2022 (Phase 1)
Which of the following occurs more than one and less than five in a chromosome?

Options:
A Chromatid
B Chromomere
C Centromere
D Telomere

The correct answer is:
Telomere

Solution:
Each of the chromatids is capped with the telomere structure on either end of each arm. Therefore, a single chromosome in metaphase would have four total telomeres, two on each sister chromatid. Each chromosome consists of two chromatids and one centromere. Chromomeres form from the local coiling of a continuous DNA thread. There are more than 2000 chromomeres on 20 chromosomes of maize.
Related Theory
A telomere is the end of $a$ chromosome. Telomeres are made of repetitive sequences of non-coding DNA that protect the chromosome from damage. Each time a cell divides, the telomeres become shorter. In humans the telomere sequence is TTAGGG.

Topic: Biology, Cell Cycle and Cell Division, NEET, NEET 2002
Which of the following on adding will not change the pH of 100mL of x M HCl dil solution:

Options:
A 100 mL of pure water
B 100Â mL of 2xMÂ HCl
C 50Â mL of pure water
D 50 mL of xM HCl

The correct answer is:
50 mL of xM HCl

Solution:
On mtextxing two solutions of same kind having same concentration, there will be no change in its pH value

Topic: Chemistry, Ionic Equilibrium, NEET
Which of the following on heating with aqueous KOH, produces acetaldehyde?

Options:
A C H 3 C H 2 Cl
B C H 2 ClC H 2 Cl
C C H 3 CHC l 2
D C H 3 COCl

The correct answer is:
C H 3 CHC l 2

Solution:

Topic: Chemistry, Aldehydes and Ketones, NEET
Which of the following operations will not increase the sensitivity of a potentiometer?

Options:
A Increase in the number of wires of the potentiometer.
B Reducing the potential gradient.
C Increasing the current through the potentiometer.
D Increasing the sensitivity of the galvanometer.

The correct answer is:
Increasing the current through the potentiometer.

Solution:
V=IR=IρlA
∴Vl=k=IρA
Increase in I, will increase k, so it will decrease sensitivity.

Topic: Physics, Current Electricity, NEET
Which of the following option is correct about gametes in case of oogamy?

Options:
A gamete - motile; gamete - motile
B gamete - non-motile; gamete - non-motile
C gamete - motile; gamete - non-motile
D gamete - non-motile; gamete - motile

The correct answer is:
gamete - motile; gamete - non-motile

Solution:
Fusion between one large, nonmotile (static) female gamete and a smaller, motile male gamete is termed oogamous, e.g., Volvox, Fucus.

Topic: Biology, Plant Kingdom, NEET
Which of the following option is correct about the excretory system in humans?

Options:
A GFR: 125 ml/day
B Urine output : 180 litre/day
C Urea excretion : 25 - 30 mg/day
D CO2 removal : 0.9-1kg/day/human

The correct answer is:
CO2 removal : 0.9-1kg/day/human

Solution:
GFR in an individual is, in males, the rate is 120-125ml/min, in females, it is 110ml/min. On average, 25-30gm of urea is excreted out per day. Urine output is about 1.5 to 2L/day. Our lungs remove large amounts of carbon dioxide, approximately 0.9-1kg/day/human.

Topic: Biology, Excretory Products and their Elimination, NEET
Which of the following option is correct regarding the structure of borax?

Options:
A Two triangular and two tetrahedral units
B Three triangular and one tetrahedral units
C All tetrahedral units
D All triangular units

The correct answer is:
Two triangular and two tetrahedral units

Solution:

Topic: Chemistry, p Block Elements (Group 13 & 14), NEET
Which of the following option is incorrect about melting point order?

Options:
A TMnFe< TCr
B TTcRu< TMo
C TAgAuCu
D TWRuTa

The correct answer is:
TWRuTa

Solution:
Correct Option is : 4
TWRuTa

Topic: Chemistry, d and f Block Elements, NEET
Which of the following option is incorrect?

Options:
A Lipoproteins = Proteins + Lipids
B Chromoproteins = Proteins + Lipids
C Nucleoproteins = Proteins + Nucleic acids
D Glycoproteins = Proteins + Carbohydrates

The correct answer is:
Chromoproteins = Proteins + Lipids

Solution:
A chromoprotein is a conjugated protein that contains a pigmented prosthetic group (or cofactor). A common example is a haemoglobin, which contains a heme cofactor, which is the iron-containing molecule that makes oxygenated blood appear red.

Topic: Chemistry, Biomolecules, NEET
Which of the following option is not correct for the post fertilization changes?

Options:
A PEN - Endosperm
B Ovary = Fruit
C Funicle = stalk of seed
D Integument = Pericarp

The correct answer is:
Integument = Pericarp

Solution:
After fertilization ovary develops to form the fruit and ovary wall develops to form a fruit wall called the pericarp. Ovule develops to form seed and integuments form seed coat (testa and tegmen). Funicle is the stalk of ovule which after fertilization forms stalk of seed.

Topic: Biology, Morphology of Flowering Plants, NEET
Which of the following option justify that why bacteria are useful in genetic engineering?

Options:
A They are very small. They do not need large containers. They have no mitochondria.
B They reproduce asexually. They can double their numbers in twenty minutes in good conditions. They have cell walls.
C They have the same genetic code as other organisms. They have plasmids. There can multiply faster.
D Their DNA is not in a nucleus. They have a cell membrane. They have a large surface area to volume ratio.

The correct answer is:
They have the same genetic code as other organisms. They have plasmids. There can multiply faster.

Solution:
Bacteria act as a useful tool in biotechnology because:
The genetic code has been universal, the basic structure of genetic material is the same. They are simple organisms and easy to manipulate; also, they multiply at a rapid rate. They have extrachromosomal DNA called plasmids which can be used as a vector in genetic engineering

Topic: Biology, Biotechnology - Principles and Processes, NEET
Which of the following option represent extinct species?

Options:
A Dodo (Mauritius), Quagga (Africa)
B Thylacine (Australia), Stellar sea cow (Russia)
C Three subspecies of Tiger (Bali, Javan and Caspian)
D All of the above

The correct answer is:
All of the above

Solution:
In the last 500 years, IUCN Red List (2004) indicates the extinction of 784 species (including 338 vertebrates, 359 invertebrates, and 87 plants). Some examples of recent extinctions are :
1. Dodo (Mauritius). 2. Quagga (Africa). 3. Thylacine (Australia). 4. Steller's Sea Cow (Russia). 5. 3 subspecies (Bali, Javan, Caspian) of the tiger.
- Extinction of 27 species has occurred in just the last 20 years only.

Topic: Biology, Biodiversity and its Conservation, NEET
Which of the following option represents the correct blood flow pathway in pulmonary circulation?

Options:
A Right ventricle âveinPulmonary Lungs âarteryPulmonary Left atrium
B Right ventricle âarteryPulmonary Lungs âveinPulmonary Left atrium
C Left ventricle âveinPulmonary Lungs âarteryPulmonary Right atrium
D Left ventricle âarteryPulmonary Lungs âveinPulmonary Right atrium

The correct answer is:
Right ventricle âarteryPulmonary Lungs âveinPulmonary Left atrium

Solution:
The human heart is four-chambered divided into two atria and two ventricles. The pathway followed by blood to circulate is as shown in the given figure.

Topic: Biology, Body Fluids and Circulation, NEET
Which of the following option shows a pair of antagonist phytohormones with respect to the given feature?

Options:
A Parthenocarpy: Auxin antagonist to Gibberellin
B Abscission: Ethylene antagonist to Abscisic acid
C Seed Germination: Gibberellin antagonist to Abscisic acid
D Senescence: Gibberellin antagonist to Cytokinin

The correct answer is:
Seed Germination: Gibberellin antagonist to Abscisic acid

Solution:
Both auxin and gibberellin can promote parthenocarpy. Both ethylene and abscisic acid promote abscission. Both gibberellin and cytokinin delay senescence. However, gibberellin promotes seed germination while Abscisic acid inhibits seed germination. Thus, they are antagonistic.

Topic: Biology, Plant - Growth and Development, NEET
Which of the following options about algae and their respective chlorophylls is correct?

Options:
A Phaeophyceae - chl a, chl b and fucoxanthin; Rhodophyceae - chl a, chl d and phycoerythrin; and Chlorophyceae - chl a and chl c
B Rhodophyceae - chl a, chl b and phycoerythrin; Chlorophyceae - chl a and chl d; and Phaeophyceae - chl a, chl c and fucoxanthin
C Chlorophyceae - chl a and chl b; Rhodophyceae - chl a, chl d and phycoerythrin and Phaeophyceae - chl a, chl c and fucoxanthin
D Chlorophyceae - chl a and chl b; Phaeophyceae - chl a, chl d and fucoxanthin; and Rhodophyceae - chl a, chl c and phycoerythrin

The correct answer is:
Chlorophyceae - chl a and chl b; Rhodophyceae - chl a, chl d and phycoerythrin and Phaeophyceae - chl a, chl c and fucoxanthin

Solution:
The members of Chlorophyceae or green algae possess chl a and b as their photosynthetic pigments. The members of Rhodophyceae or red algae possess chl a, chl d and phycoerythrin as their photosynthetic pigments. The members of Phaeophyceae or brown algae possess chl a, chl c and fucoxanthin as their photosynthetic pigments.

Topic: Biology, Plant Kingdom, NEET
Which of the following options about sites of digestion is CORRECT?

Options:
A
B
C
D

The correct answer is:

Solution:
Digestion takes place through the alimentary canal. It begins in the mouth and completes in the small intestine. However, different foods get digested at different parts due to the presence of specific enzymes. Digestion of carbohydrates occurs in the mouth as it contains amylase i.e. carbohydrate digesting enzyme. The stomach releases the pepsin enzyme, which is protein-digesting and hence protein digestion takes place in the stomach and also in the small intestine. Lipid or the fat digestion begins in the stomach with the gastric lipase. However, the bulk of lipid digestion occurs in the small intestine due to pancreatic lipase. However, the small intestine is the site of the complete digestion of nucleic acids. Nucleic acids like DNA and RNA in food get digested in the small intestine with the help of pancreatic enzymes and the small intestine enzymes like ribonuclease and deoxyribonuclease.

Topic: Biology, Digestion and Absorption, NEET
Which of the following options are correct?

A. An excessive loss of body fluid from the body switches off osmoreceptors.

B. ADH facilitates water reabsorption to prevent diuresis

C. ANF causes vasodilation

D. ADH causes increase in blood pressure

E. ADH is responsible for decrease in GFR.

Choose the correct answer from the options given below:

Options:
A C, D and E only
B A and B only
C B, C and D only
D A, B and E only

The correct answer is:
B, C and D only

Solution:
Osmoreceptors in the body are activated by changes in blood volume, or body fluid volume and ionic concentration.

ADH, secreted from neurohypophysis, facilitates water reabsorption from latter parts of the tubule, thereby preventing diuresis.

ADH has constrictory effects on blood vessels. This increases the blood pressure.

An increase in blood pressure can increase the glomerular blood flow and thereby the GFR.

ANF can cause vasodilation (dilation of the blood vessels) and thereby decrease the blood pressure.

Topic: Biology, Chemical Coordination and Integration, NEET, NEET 2023 (All India)
Which of the following options best explains the bonding in coordination compounds in terms of Werner's postulates?

Options:
A Werner's postulates describe the formation of coordinate bonds between metal ions and ligands, leading to the formation of coordination compounds.
B Werner's postulates describe the geometry and coordination number around the central metal ion in coordination compounds.
C Werner's postulates emphasise the importance of isomerism and structural arrangements in coordination compounds.
D Werner's postulates focus on the electronic structure of ligands and their influence on the magnetic properties of coordination compounds.

The correct answer is:
Werner's postulates describe the formation of coordinate bonds between metal ions and ligands, leading to the formation of coordination compounds.

Solution:
Correct Option is : (A)
Werner's postulates describe the formation of coordinate bonds between metal ions and ligands, leading to the formation of coordination compounds.

Topic: Chemistry, Coordination Compounds, NEET
Which of the following options best represents the electrostatic potential energy of a neutron, assumed to be composed of one up quark [charge (2/3) e] and two down quarks [charges –(1/3) e] in a triangle configuration with a side length of approximately 10^-15 m?

Options:
A -7.68×10-14J
B -3.84×10-14J
C 7.68×10-14J
D 3.84×10-14J

The correct answer is:
-7.68×10-14J

Solution:
Correct Option is : (A)
-7.68×10-14J

Topic: Chemistry, Capacitance, NEET
Which of the following options best represents the enzyme composition of pancreatic juice?

Options:
A Amylase, peptidase, trypsinogen, rennin
B Amylase, pepsin, trypsinogen, maltase
C Peptidase, amylase, pepsin, rennin
D Lipase, amylase, trypsinogen, procarboxypeptidase

The correct answer is:
Lipase, amylase, trypsinogen, procarboxypeptidase

Solution:
Rennin and Pepsin enzymes are present in the gastric juice. Maltase is present in the intestinal juice. Lipase, amylase, trypsinogen, procarboxypeptidase are secreted by pancreas.

Topic: Biology, Digestion and Absorption, NEET, NEET 2017
Which of the following options best represents the loss of potential energy (P.E.) of a raindrop of mass 1.00 g falling from a height of 1 km and hitting the ground with a speed of 50 m/s?

Options:
A 5 J
B 10 J
C 15 J
D 20 J

The correct answer is:
10 J

Solution:
Correct Option is : (B)
10 J

Topic: Chemistry, Work Power Energy, NEET
Which of the following options can convert Ethene into benzene?

Options:
A Ethene can be converted into benzene by adding a methyl group to the double bond in the presence of a suitable catalyst.
B Ethene can be directly converted into benzene by heating it to a high temperature in the absence of oxygen.
C Ethene was first converted into 1,2-dibromoethane by the action of bromine, tetrachloromethane. Then it is treated with alc. KOH to form bromoethene which will further react with NaNH2/liq.NH3to form ethyne. After that ethyne is heated in the red-hot iron tube at 873 K, benzene is obtained.
D Ethene cannot be converted into benzene through any known chemical process.

The correct answer is:
Ethene was first converted into 1,2-dibromoethane by the action of bromine, tetrachloromethane. Then it is treated with alc. KOH to form bromoethene which will further react with NaNH2/liq.NH3to form ethyne. After that ethyne is heated in the red-hot iron tube at 873 K, benzene is obtained.

Solution:
Correct Option is : (C)
Ethene was first converted into 1,2-dibromoethane by the action of bromine, tetrachloromethane. Then it is treated with alc. KOH to form bromoethene which will further react with NaNH2/liq.NH3to form ethyne. After that ethyne is heated in the red-hot iron tube at 873 K, benzene is obtained.

Topic: Chemistry, Hydrocarbons, NEET
Which of the following options can convert Ethyne into benzene?

Options:
A Ethyne can be converted into benzene by heating it with a strong acid catalyst.
B Ethyne can be converted into benzene by heating it in red hot iron tube around 873K
C Ethyne can be converted into benzene by hydrogenating it in the presence of a nickel catalyst.
D Ethyne can be converted into benzene by treating it with chlorine gas followed by hydrolysis.

The correct answer is:
Ethyne can be converted into benzene by heating it in red hot iron tube around 873K

Solution:
Correct Option is : (B)
Ethyne can be converted into benzene by heating it in red hot iron tube around 873K

Topic: Chemistry, Hydrocarbons, NEET
Which of the following options can convert Hexane into benzene?

Options:
A Hexane can be directly converted into benzene by heating it to a high temperature.
B Hexane can be converted into benzene by treating it with a strong reagent.
C Hexane can be converted into benzene by hydrogenating it in the presence of a nickel catalyst.
D Hexane undergoes pyrolysis in presence of chromium oxide catalyst and at high temperature and pressure, it forms benzene.

The correct answer is:
Hexane undergoes pyrolysis in presence of chromium oxide catalyst and at high temperature and pressure, it forms benzene.

Solution:
Correct Option is : (D)
Hexane undergoes pyrolysis in presence of chromium oxide catalyst and at high temperature and pressure, it forms benzene.

Topic: Chemistry, Hydrocarbons, NEET
Which of the following options contains a set of protochordates?

Options:
A Balaenoptera, Macropus, Salpa
B Delphinus, âColumba, Doliolum
C Doliolum, Ascidia, Saccoglossus
D Salpa, Doliolum, Branchiostoma

The correct answer is:
Salpa, Doliolum, Branchiostoma

Solution:
Subphyla Urochordata and Cephalochordata are often referred to as protochordates and are exclusively marine. In Urochordata, the notochord is present only in larval tail, while in Cephalochordata, it extends from head to tail region and is persistent throughout their life. Examples: Urochordata â Ascidia, Salpa, Doliolum; Cephalochordata â Branchiostoma (Amphioxus or Lancelet).

Topic: Biology, Animal Kingdom, NEET
Which of the following options correctly explains coordination entities with two examples each?

Options:
A A coordination entity constitutes a central metal atom or ion bonded to a fixed number of ions or molecules. Examples include [Fe(H2O)6]2+and [Cu(NH3)4]2+.
B Coordination entities are compounds formed through ionic interactions between a metal ion and non-metal ions. Examples include NaCl and K2SO4.
C Coordination entities are molecules composed of only non-metal atoms bonded covalently. Examples include H2O and CO2.
D Coordination entities are species formed by covalent bonds between non-metal atoms. Examples include CH4and O2.

The correct answer is:
A coordination entity constitutes a central metal atom or ion bonded to a fixed number of ions or molecules. Examples include [Fe(H2O)6]2+and [Cu(NH3)4]2+.

Solution:
Correct Option is : (A)
A coordination entity constitutes a central metal atom or ion bonded to a fixed number of ions or molecules. Examples include [Fe(H2O)6]2+and [Cu(NH3)4]2+.

Topic: Chemistry, Coordination Compounds, NEET
Which of the following options correctly explains coordination polyhedron?

Options:
A The spatial arrangement of the ligand atoms which are directly attached to the central atom/ion defines a coordination polyhedron about the central atom. Examples include octahedral in [Co(NH3)6]3+and tetrahedra; in [Ni(CO)4].
B Coordination polyhedron is a type of chemical reaction that occurs in coordination compounds, involving the exchange of ligands between the central metal ion and the solvent molecules. Examples include substitution reactions in transition metal complexes.
C Coordination polyhedron represents the overall shape of a coordination compound molecule, including the arrangement of ligands around the central metal ion. Examples include octahedral and tetrahedral coordination polyhedra.
D Coordination polyhedron refers to the number of ligands directly bonded to the central metal ion in a coordination complex. Examples include hexadentate and bidentate coordination polyhedra.

The correct answer is:
The spatial arrangement of the ligand atoms which are directly attached to the central atom/ion defines a coordination polyhedron about the central atom. Examples include octahedral in [Co(NH3)6]3+and tetrahedra; in [Ni(CO)4].

Solution:
Correct Option is : (A)
The spatial arrangement of the ligand atoms which are directly attached to the central atom/ion defines a coordination polyhedron about the central atom. Examples include octahedral in [Co(NH3)6]3+and tetrahedra; in [Ni(CO)4].

Topic: Chemistry, Coordination Compounds, NEET
Which of the following options correctly explains ligands with two examples each?

Options:
A Ligands are ions that form ionic bonds with central metal ions. Examples include Na+,K+.
B Ligands are compounds that accept electrons from a central metal ion, resulting in the formation of coordination bonds. Examples include Cl−and F−.
C Ligands are molecules or ions that donate electron pairs to a central metal ion, forming coordination bonds. Examples include H2O and NH3
D Ligands are covalent compounds that do not interact with metal ions. Examples include O2and N2.

The correct answer is:
Ligands are molecules or ions that donate electron pairs to a central metal ion, forming coordination bonds. Examples include H2O and NH3

Solution:
Correct Option is : (C)
Ligands are molecules or ions that donate electron pairs to a central metal ion, forming coordination bonds. Examples include H2O and NH3

Topic: Chemistry, Coordination Compounds, NEET