datavorous/entrance-exam-dataset huggingface dataset:
Which if these correctly describes the valves of the heart?

Options:
A Bicuspid valve is the right atrioventricular valve while the tricuspid valve is the left atrioventricular valve.
B Bicuspid valve is the left atrioventricular valve while the tricuspid valve is the right atrioventricular valve.
C Bicuspid valve is the right atrioventricular valve while the mitral valve is the left atrioventricular valve.
D Semilunar valve is the right atrioventricular valve while the tricuspid valve is the left atrioventricular valve.

The correct answer is:
Bicuspid valve is the left atrioventricular valve while the tricuspid valve is the right atrioventricular valve.

Solution:
The valve present between the right atrium and right ventricle is the right atrioventricular valve also called the tricuspid valve as it has three cusps. It allows movement of deoxygenated blood from the right atrium to right ventricle but prevents the backflow of blood from the right ventricle.
The valve present between the left atrium and left ventricle is the left atrioventricular valve also called the bicuspid valve (mitral valve) as it has two cusps. It allows movement of oxygenated blood from the left atrium to left ventricle but prevents the backflow of blood from the left ventricle.
The opening of the right ventricle into the pulmonary trunk is guarded by a pulmonary semilunar valve. While the aortic semilunar valve guards the opening between left ventricle and aorta.

Topic: Biology, Body Fluids and Circulation, NEET
Which important property did Mendeleev use to classify the elements in his periodic table?

Options:
A Atomic mass
B Atomic number
C Density
D Melting point

The correct answer is:
Atomic mass

Solution:
Correct Option is : (A)
Atomic mass

Topic: Chemistry, Classification of Elements and Periodicity in Properties, NEET
Which impurities are oxidized and passed into the slag during the conversion process?

Options:
A Sulphur, iron, and carbon
B Sulphur, silicon, and phosphorus
C Silicon, manganese, and iron
D Phosphorus, carbon, and silicon

The correct answer is:
Sulphur, silicon, and phosphorus

Solution:
During the conversion, sulphur, silicon, and phosphorus impurities are oxidized and passed into the slag.

Topic: Chemistry, General Principles and Processes of Isolation of Metals, NEET
Which impurities are present in crude sodium chloride obtained by crystallization of brine solution?

Options:
A Sodium sulfate, potassium chloride, calcium carbonate
B Sodium carbonate, calcium sulfate, magnesium chloride
C Sodium sulfate, calcium sulfate, calcium chloride, magnesium chloride
D Potassium sulfate, calcium chloride, magnesium sulfate

The correct answer is:
Sodium sulfate, calcium sulfate, calcium chloride, magnesium chloride

Solution:
Crude sodium chloride obtained by crystallization of brine solution contains impurities such as sodium sulfate, calcium sulfate, calcium chloride, and magnesium chloride.

Topic: Chemistry, s Block Elements, NEET
Which impurity, having the following number of valence electrons should be added to silicon to get a n- type semiconductor?

Options:
A 1
B 2
C 3
D 5

The correct answer is:
5

Solution:
n- type of semiconductor have free electron. The purpose is to make more charge carrier or electron available in the material for conduction.

Topic: Chemistry, Solid State, NEET
Which Indian plants have either been patented or attempts have been made to patent them by western nations for their commercial use?

Options:
A Basmati rice, neem and brazzeana
B Turmeric, cocus, brazzeana
C Neem, cardamom, pothos
D Basmathi rice, neem and turmeric

The correct answer is:
Basmathi rice, neem and turmeric

Solution:
By definition "a biological patent is a patent on an invention in the field of biology that by law allows the patent holder to exclude others from making, using, selling, or importing the protected invention for a limited period of time." The biopatent generally includes the biological technology process and its products, GMO, transgenic organisms, and even genetic material. These all vary as per the jurisdiction of the granting authority. The granting authority for biopatent is the government where application has been made.
Basmati rice is a variety indigenous to India and has been subjected to patent target by other western nations. Even neem and turmeric having medicinal properties are targeted for patents western nations even though these have been part of the rich traditional heritage of India.

Topic: Biology, Biotechnology and Its Applications, NEET
Which indicator is used in the titration of sodium hydroxide against oxalic acid and what is the colour change at the end point?

Options:
A Phenolphthalein, pink to yellow
B Alkaline $\mathrm{KMnO}_4$, colourless to pink
C Phenolphthalein, colourless to pink
D Methyl orange, yellow to pinkish red colour

The correct answer is:
Phenolphthalein, colourless to pink

Solution:
For weak acid and strong base titration, phenolphthalein is used as indicator. In acidic medium phenolphthalein is colourless while in alkaline medium it is pink in colour.

Topic: Chemistry, Ionic Equilibrium, NEET, NEET 2024 (Re-NEET)
Which indicator of an acid-base reaction is the change in color of litmus paper mentioned in the paragraph?

Options:
A Turn red litmus paper into blue
B Turn blue litmus paper into red
C Turn green litmus paper into red
D Turn yellow litmus paper into purple

The correct answer is:
Turn red litmus paper into blue

Solution:
The paragraph states that bases are known to turn red litmus paper into blue.

Topic: Chemistry, Ionic Equilibrium, NEET
Which industrial chemicals are manufactured from sulphur dioxide?

Options:
A Sodium chloride and calcium carbonate
B Sulphuric acid, sodium hydrogen sulphite, and calcium hydrogen sulphite
C Nitric acid and acetic acid
D Hydrochloric acid and potassium hydroxide

The correct answer is:
Sulphuric acid, sodium hydrogen sulphite, and calcium hydrogen sulphite

Solution:
The passage mentions that sulphur dioxide is used in manufacturing sulphuric acid, sodium hydrogen sulphite, and calcium hydrogen sulphite, which are industrial chemicals.

Topic: Chemistry, p Block Elements (Group 15, 16, 17 & 18), NEET
Which industrial process is primarily used to manufacture sulfuric acid?

Options:
A Fischer-Tropsch process
B Contact Process
C Haber-Bosch process
D Solvay process

The correct answer is:
Contact Process

Solution:
Sulfuric acid is primarily manufactured using the Contact Process.

Topic: Chemistry, p Block Elements (Group 15, 16, 17 & 18), NEET
Which industry commonly uses milk of lime in its processes?

Options:
A Textile industry
B Pharmaceutical industry
C Food processing industry
D Construction industry

The correct answer is:
Textile industry

Solution:
The textile industry commonly uses milk of lime in its processes.

Topic: Chemistry, s Block Elements, NEET
Which industry utilizes fly ash and slag from the steel industry as raw materials?

Options:
A Automotive industry
B Textile industry
C Cement industry
D Electronics industry

The correct answer is:
Cement industry

Solution:
The cement industry often utilizes fly ash and slag from the steel industry as raw materials in their production processes.

Topic: Chemistry, Environmental Chemistry, NEET
Which inorganic substances do chemosynthetic autotrophic bacteria oxidize to produce ATP?

Options:
A Nitrates
B Nitrites
C Ammonia
D All of the above

The correct answer is:
All of the above

Solution:
Chemosynthetic autotrophic bacteria oxidize various inorganic substances such as nitrates, nitrites and ammonia and use the released energy for their ATP production.

Topic: Biology, Biological Classification, NEET
Which interhalogen compound should have the maximum number of atoms in its molecule, and what is its formula?

Options:
A Iodine (I) fluoride, IF
B Chlorine (Cl) fluoride, ClF
C Bromine (Br) fluoride, BrF
D Chlorine (Cl) bromide, ClBr

The correct answer is:
Iodine (I) fluoride, IF

Solution:
Iodine (VII) fluoride (IF7) should have the maximum number of atoms in its molecule among interhalogen compounds.

Topic: Chemistry, p Block Elements (Group 15, 16, 17 & 18), NEET
Which intermolecular force is most responsible in allowing xenon gas to liquefy?

Options:
A London forces
B Ion-dipole
C Ionic
D Dipole-dipole

The correct answer is:
London forces

Solution:
London dispersion Force (LDF), also known as london forces, or instantaneous dipole-induced dipole forces, is the weakest Van der-waals force which arises in non-polar molecules due to temporary rearrangement of electrons.

Topic: Chemistry, Chemical Bonding and Molecular Structure, NEET
Which intrauterine event is incorrectly matched with its time of occurrence?

Options:
A

Intrauterine Event	Time period of occurrence
Development of limbs and digits	End of two months

B

Intrauterine Event	Time period of occurrence

Development of heart	End of three months

C

Intrauterine Event	Time period of occurrence
Development of major organs system	In first trimester

D

Intrauterine Event	Time period of occurrence
Development of hair on body	In second trimester

The correct answer is:

Intrauterine Event	Time period of occurrence

Development of heart	End of three months

Solution:
In human beings, after one month of pregnancy, the embryoâs heart is formed. The first sign of growing foetus may be noticed by listening to the heart sound carefully through the stethoscope. By the end of the second month of pregnancy, the foetus develops limbs and digits. By the end of 12 weeks (first trimester), most of the major organ systems are formed, for example, the limbs and external genital organs are welldeveloped. The first movements of the foetus and appearance of hair on the head are usually observed during the fifth month. By the end of about 24 weeks (end of second trimester), the body is covered with fine hair, eye-lids separate, and eyelashes are formed. By the end of nine months of pregnancy, the foetus is fully developed and is ready for delivery.

Topic: Biology, Human Reproduction, NEET
Which ion acts as a self-indicator in some titrations due to its intense color?

Options:
A Mn2+
B Fe3+
C MnO4-
D Cr2O72-

The correct answer is:
MnO4-

Solution:
MnO4- can act as a self-indicator in some titrations because of its intense color.

Topic: Chemistry, Redox Reactions, NEET
Which ion appears blue when it is in the 3d1 state?

Options:
A V4+
B V3+
C Ti3+
D Cr3+

The correct answer is:
V3+

Solution:
The paragraph mentions that V4+ appears blue when it is in the 3d1 state.

Topic: Chemistry, d and f Block Elements, NEET
Which ion appears violet when it is in the 3d3 state?

Options:
A Cr3+
B Mn3+
C V4+
D Ti3+

The correct answer is:
Cr3+

Solution:
Cr3+ appears violet when it is in the 3d3 state.

Topic: Chemistry, d and f Block Elements, NEET
Which ion has a similar charge/radius ratio to Be2+?

Options:
A Al3+
B Mg2+
C Na+
D O2-

The correct answer is:
Al3+

Solution:
The passage states that the charge/radius ratio of Be2+ is nearly the same as that of the Al3+ ion.

Topic: Chemistry, s Block Elements, NEET
Which ion has an Eo value that reflects the stability of a noble gas configuration?

Options:
A Sc3+
B Zn2+
C Mn2+
D V2+

The correct answer is:
Sc3+

Solution:
The low Eo value for Sc reflects the stability of Sc3+ which has a noble gas configuration.

Topic: Chemistry, d and f Block Elements, NEET
Which ion helps in opening and closing of stomata?

Options:
A Mn+
B Mg2+
C Ca2+
D K+

The correct answer is:
K+

Solution:
According to active K+ theory of Levitt, opening of stomata occurs due to influx of K+ into guard cells. The source of K+ ions are nearby subsidiary and epidermal cells. The stomatal closure is considered to be brought about by exertion of K+and Cl-from the guard cells to epidermal tissue.

Topic: Biology, Transport in Plants, NEET
Which ion is an exception for forming cations in ionic compounds?

Options:
A Ammonium ion (NH4+)
B Hydroxide ion (OH-)
C Chloride ion (Cl-)
D Nitrate ion (NO3-)

The correct answer is:
Ammonium ion (NH4+)

Solution:
Ammonium ion (NH4+) is an exception because it forms the cation in some ionic compounds despite being composed of two non-metallic elements.

Topic: Chemistry, Chemical Bonding and Molecular Structure, NEET
Which ion is colorless when it is in the 3d10 state?

Options:
A Zn2+
B Cu2+
C Ni2+
D Fe2+

The correct answer is:
Zn2+

Solution:
The paragraph states that Zn2+ is colorless when it is in the 3d10 state.

Topic: Chemistry, d and f Block Elements, NEET
Which ion is reduced by K2Cr2O7
during a titration?

Options:
A MnO4-
B Fe2+
C Cr2O72-
D H+

The correct answer is:
Cr2O72-

Solution:
K2Cr2O7 is reduced to Cr3+ ions during a titration.

Topic: Chemistry, Redox Reactions, NEET
Which ion oxidizes the reductant in some titrations before producing a visible color change at the endpoint?

Options:
A Mn2+
B Fe3+
C MnO4-
D Cr2O72-

The correct answer is:
MnO4-

Solution:
MnO4- oxidizes the reductant in some titrations before producing a visible color change at the endpoint.

Topic: Chemistry, Redox Reactions, NEET
Which ionic substance shows both Frenkel and Schottky defects?

Options:
A NaCl
B KCl
C CsCl
D AgBr

The correct answer is:
AgBr

Solution:
AgBr shows both Frenkel and Schottky defects.

Topic: Chemistry, Solid State, NEET
Which ions are known to have tetrahedral [MO4]n- ions?

Options:
A VV, CrVI, MnV, MnVI
B Sc, Ti, Fe, Mn
C VO2+, VIV, TiIV
D Mn2O7, Fe2O3, V2O5

The correct answer is:
VV, CrVI, MnV, MnVI

Solution:
The tetrahedral [MO4]n- ions are known for VV, CrVI, MnV, MnVI.

Topic: Chemistry, d and f Block Elements, NEET
Which ions are released by the IUDs so that they become toxic for the sperm?

Options:
A Iron
B Cobalt
C Copper
D Magnesium

The correct answer is:
Copper

Solution:
These devices are inserted by doctors or expert nurses in the uterus through vagina. These Intra Uterine Devices are presently available as the non-medicated IUDs (e.g., Lippes loop), copper releasing IUDs (CuT, Cu7, Multiload 375) and the hormone releasing IUDs (Progestasert, LNG-20). IUDs increase phagocytosis of sperms within the uterus and the Cu ions released suppress sperm motility and the fertilising capacity of sperms. The hormone releasing IUDs, in addition, make the uterus unsuitable for implantation and the cervix hostile to the sperms.

Topic: Biology, Reproductive Health, NEET
Which ions are the strongest oxidizing agents in aqueous solutions?

Options:
A Titanium and vanadium
B Manganese and cobalt
C Chromium and nickel
D Manganese and cobalt

The correct answer is:
Manganese and cobalt

Solution:
Mn3+ and Co3+ ions are the strongest oxidizing agents in aqueous solutions.

Topic: Chemistry, d and f Block Elements, NEET
Which ions can Bohr's theory be applied to, similar to hydrogen, due to having only one electron?

Options:
A Ions with multiple electrons.
B Ions with a single electron, such as He+, Li2+, Be3+, etc.
C Ions with no electrons.
D Ions with more than one proton in the nucleus.

The correct answer is:
Ions with a single electron, such as He+, Li2+, Be3+, etc.

Solution:
Bohr's theory can be applied to ions containing only one electron, similar to hydrogen.

Topic: Chemistry, Structure of Atom, NEET
Which is a characterstic of catalyst used in a chemical reaction?

Options:
A Decreases rate constant of the reaction
B Increases activation energy of the reaction
C Reduces enthalpy of the reaction
D Does not affect equilibrium constant of reaction

The correct answer is:
Does not affect equilibrium constant of reaction

Solution:
Catalyst does not affect equilibrium constant but it alters the path of chemical reaction, hence it alters enthalpy of the reaction, rate constant of the reaction and energy activation.

Topic: Chemistry, Chemical Kinetics, NEET
Which is a communicating junction which allows the cells to contract as a unit in the heart?

Options:
A Intercalated disc
B Gap junction
C Desmosome
D Intercellular bridges

The correct answer is:
Gap junction

Solution:
The muscular contraction and relaxation in cardiac muscle are governed by the gap junctions. The signal to contract is passed efficiently through gap junctions and allows the heart to respond in a synchronous manner.

Topic: Biology, Structural Organisation in Animals, NEET
Which is a dominant character of a pod of a pea?

Options:
A Constricted shape
B Inflated shape
C Conical shape
D Fusiform shape

The correct answer is:
Inflated shape

Solution:
Mendel conducted a cross-hybridization experiment of garden pea plants (Pisum sativum) and studied the transmission of characters. Mendel selected seven characters, and the constricted shape is a recessive character of a pod of pea.

Topic: Biology, Principles of Inheritance and Variation, NEET
Which is a Lewis base?

Options:
A B2H6
B LiAlH4
C AlH3
D NH3

The correct answer is:
NH3

Solution:
According to Lewis, "A base is a species which can donate an electron pair." In NH3,N¨ has one lone pair. Thus, N¨H3is a Lewis base.

Topic: Chemistry, Ionic Equilibrium, NEET
Which is a molecule where an intermolecular hydrogen bond exists?

Options:
A Oxygen
B Nitrogen
C Hydrogen fluoride (HF)
D O-nitrophenol

The correct answer is:
Hydrogen fluoride (HF)

Solution:
An intermolecular hydrogen bond is found in the case of HF (hydrogen fluoride) molecules.

Topic: Chemistry, Chemical Bonding and Molecular Structure, NEET
Which is a molecule where an intramolecular hydrogen bond exists?

Options:
A Oxygen
B Nitrogen
C Hydrogen fluoride (HF)
D O-nitrophenol

The correct answer is:
O-nitrophenol

Solution:
An intramolecular hydrogen bond is in o-nitrophenol, where hydrogen is between two oxygen atoms.

Topic: Chemistry, Chemical Bonding and Molecular Structure, NEET
Which is a pair of geometrical isomers?

Options:
A I and II
B I and III
C II and IV
D III and IV

The correct answer is:
II and IV

Solution:
Geometrical isomers should have same molecular formula, structural formula but different arrangement of groups around C=C , Hence
are geometrical isomers.

Topic: Chemistry, General Organic Chemistry, NEET
Which is a symptom of exophthalmic goitre?

Options:
A Rapid heart beat
B Protrusion of eyeball
C Frightened look to the patient
D Both a and b

The correct answer is:
Both a and b

Solution:
Exophthalmic goitre (Craves' disease) is thyroid enlargement in which the thyroid secretes excessive amount of thyroid hormones. It is characterised by protrusion of eye balls because of fluid accumulation behind them, loss of weight, rapid heart beat, nervousness, restlessness.

Topic: Biology, Chemical Coordination and Integration, NEET
Which is acidic in the given hydrocarbons?

Options:
A CH3C≡CCH3
B CH3CH2CH2CH3
C CH3C≡CH
D CH2=CH-CH=CH2

The correct answer is:
CH3C≡CH

Solution:
Propyne has terminal carbon with sp hybridization, the highly electronegative carbon atom. The hydrogen atom attached to this carbon is one that is acidic hydrogen.

Topic: Chemistry, Hydrocarbons, NEET
Which is an example of condensation polymer among the following?

Options:
A PVC
B Decron
C Teflon
D Polystyrene

The correct answer is:
Decron

Solution:
The polymer formed by the condensation polymerisation is known as condensation polymer. Decron (Terylene) is a condensation polymer. It is formed by the condensation polymerisation of terephthalic acid and ethylene glycol.

Topic: Chemistry, Polymers, NEET
Which is an incorrect statement?

Options:
A Diamond is unaffected by conc. acids, but graphite reacts with hot conc. HNO3 forming mellitic acid C6(COOH)6
B CO is toxic because it forms a complex with hemoglobin in the blood
C C3O2 , carbon suboxide, is a foul-smelling gas
D COCl2 is called tear gas.

The correct answer is:
COCl2 is called tear gas.

Solution:
COCl2 is phosgene gas and tear gas is phenacyl chloride.

Topic: Chemistry, p Block Elements (Group 13 & 14), NEET
Which is an oxidising as well as a reducing agent in the following?

Options:
A Na2O2
B Na2O
C SnCl4
D NaNO2

The correct answer is:
NaNO2

Solution:
NaNO2 (Sodium nitrite) act both as oxidising as well as reducing agent because in it N
atom is in +3 oxidation state (intermediate oxidation state)
Oxidising property 2NaNO2+2KI+2H2SO4→Na2SO4+K2SO4+2NO+2H2O+I2
Reducing property H2O2+NaNO2→NaNO3+H2O .

Topic: Chemistry, p Block Elements (Group 15, 16, 17 & 18), NEET
Which is correct about a crystalline solid

Options:
A Changes abruptly from solid to liquid when heated
B Has no definite melting point
C Undergoes deformation of its geometry easily
D Has an irregular 3-dimensional arrangements

The correct answer is:
Changes abruptly from solid to liquid when heated

Solution:
In crystalline solid there is perfect arrangement of the constituent particles only at 0K. As the temperature increases the chance that a lattice site may be unoccupied by an ion increases. As the number of defects increases with temperature solid change in liquid.

Topic: Chemistry, Solid State, NEET
Which is correct about physical adsorption

Options:
A Involves the weak attractive interaction between the adsorbent and adsorbate
B Increases with increase of temperature
C Is irreversible in nature
D Involves the chemical interactions between the adsorbent and adsorbate

The correct answer is:
Involves the weak attractive interaction between the adsorbent and adsorbate

Solution:
physical adsorption involves the weak attractive interaction i.e. weak Vanderwaal’s force of attraction between the adsorbent and adsorbate

Topic: Chemistry, Surface Chemistry, NEET
Which is correct about setting of cement

Options:
A Exothermic reaction
B Endothermic reaction
C Neither exothermic nor endothermic
D None of these

The correct answer is:
Exothermic reaction

Solution:
When water is added to cement an exothermic reaction occurs. During this process, the cement reacts with water to form a gelatinous mass which slowly sets into a hard mass having three dimensional network structure involving -Si-O-Si – and -Si-O-Al- chains.

Topic: Chemistry, p Block Elements (Group 13 & 14), NEET
Which is correct about structure of silicon dioxide?

Options:
A Each silicon atom is surrounded by four oxygen atoms and each oxygen atom is bonded to two silicon atoms
B Each siliocn atom is surrounded by two oxygen atoms and each oxygen atom is bounded to two silicon atoms
C Silicon atom is bonded to two oxygen atoms
D There are double bonds between silicon and oxygen atoms

The correct answer is:
Each silicon atom is surrounded by four oxygen atoms and each oxygen atom is bonded to two silicon atoms

Solution:

Topic: Chemistry, p Block Elements (Group 13 & 14), NEET
Which is correct according to the collision theory of chemical reactions?

Options:
A A chemical reaction occurs with every molecular collision
B Rate is directly proportional to the number of collisions per second
C Reactions in the gas phase are always of zero order
D Reaction rates are of the order of molecular speeds

The correct answer is:
Rate is directly proportional to the number of collisions per second

Solution:
The increase in collision frequency brings in an increase in effective collisions and thus rate of reaction increases.

Topic: Chemistry, Chemical Kinetics, NEET
Which is correct for a diatomic molecule, according to the kinetic theory of gases

Options:
A The root mean square velocity is inversely proportional to the temperature
B The pressure exerted by the gas is proportional to the root mean square velocity of the molecules
C The mean translational kinetic energy of the molecules is proportional to the absolute temperature
D The pressure exerted by the gas is proportional to the mean velocity of the molecules

The correct answer is:
The pressure exerted by the gas is proportional to the mean velocity of the molecules

Solution:
All molecules of an ideal gas show random motion. They collide with each other and walls of container during which they lose or gain energy so they may not have same kinetic energy always.

Topic: Chemistry, States of Matter, NEET