datavorous/entrance-exam-dataset huggingface dataset:
Which of the following ligands is likely to produce a strong field, resulting in a large crystal field splitting?

Options:
A Br–
B S2–
C F–
D NH3

The correct answer is:
NH3

Solution:
NH3 is likely to produce a strong field among the given ligands, leading to a large crystal field splitting.

Topic: Chemistry, Coordination Compounds, NEET
Which of the following lines of the H-atom spectrum belongs to the Balmer series?

Options:
A 1025 â«
B 1218 â«
C 4861 â«
D 18751 â«

The correct answer is:
4861 â«

Solution:
The wavelength of different members of Balmer series are given by
1Î»=RH122-1ni2, where nâ¡ iâ¡ = 3, 4, 5....
The first member of Balmer series (HÎ±) corresponds to nâ¡ iâ¡ = 3
It has maximum energy and hence the longest wavelength. HÎ± line (or longest wavelength )
1Î»1 =RH122-132
=1.097Ã 107536
or Î» 1 = 3 6 5 Ã 1.097 Ã 1 0 7 = 6.563 Ã 1 0 - 7 m
nâ¡ = 6 5 6 3 Ã
The wavelength of the Balmer series limit corresponds to nâ¡ iâ¡ = â and has got shortest wavelength.
Therefore, wavelength of Balmer series limit is given by
1 Î» â = R H 1 2 2 - 1 â 2 = 1.097 Ã 1 0 7 Ã 1 4
or Î» â = 4 1.097 Ã 1 0 7 = 3.646 Ã 1 0 - 7 m
= 3 6 4 6 Ã
Only 4861 Ã is between the first and last line of the Balmer series.

Topic: Physics, Atomic Physics, NEET
Which of the following lipids is found in the cell membrane?

Options:
A Lecithin
B Palmitic acid
C Arachidonic acid
D Glycerol

The correct answer is:
Lecithin

Solution:
Some lipids have phosphorous and a phosphorylated organic compound in them. These are phospholipids. They are found in cell membrane. Lecithin is one example. Some tissues especially the neural tissues have lipids with more complex structures.

Topic: Chemistry, Biomolecules, NEET
Which of the following liquid pairs shows a positive deviation from Raoult’ law?

Options:
A water–nitric acid
B water–hydrochloric acid
C benzene–methanol
D acetone–chloroform

The correct answer is:
benzene–methanol

Solution:
Benzene – methanol pair shows a positive deviation from Raoult’ law as in this pair force of attraction between these two decreases so observed vapour pressure is more than expected. Rest other three pairs given here show negative deviation as in them interaction increases so observed vapour pressure is less than expected.

Topic: Chemistry, Solutions, NEET
Which of the following liquid pairs shows a positive deviation from Raoult's law?

Options:
A Water - hydrochloric acid
B Water - nitric acid
C Acetone - chloroform
D Benzene - methanol

The correct answer is:
Benzene - methanol

Solution:
In solutions showing positive deviation,the observed vapour pressure of each component and total vapour pressure are greater than predicted by Raoult's law,i.e.
Pâ¡ Î > Pâ¡ Î â x Î ; Pâ¡ Î > Pâ¡ Î â x Î ; Pâ¡ > Pâ¡ Î + Pâ¡ Î
In solution of methanol and benzene , methanol molecules are held together due to a hydrogen bonding as shown below:
On adding benzene, the benzene molecules get in between the molecules of methanol,thus breaking the hydrogen bonds. As the resulting solution has weaker intermolecular attractions, the escaping tendency of alcohol and benzene molecules from the solution increses.Consequently the vapour pressure of the solution is greater than the vapour pressure as expected from Raoult's law.

Topic: Chemistry, Solutions, NEET
Which of the following listed respiratory centres in the brain can reduce the inspiratory duration upon stimulation?

Options:
A Medullary inspiratory centre
B Pneumotaxic centre
C Apneustic centre
D Chemosensitive centre

The correct answer is:
Pneumotaxic centre

Solution:
Pons possess pneumotaxic centre, that moderates the functions of the respiratory rhythm centre. Stimulation of this centre alters the respiratory rate by reducing the duration of inspiration.

Topic: Biology, Breathing and Exchange of Gases, NEET
Which of the following male accessory gland is not found in pairs?

Options:
A Prostate Gland
B Seminal Vesicle
C Bulbourethral Gland
D Both B & C

The correct answer is:
Prostate Gland

Solution:
The prostate is a part of the male reproductive system. It produces fluid that makes up a part of semen and is the largest accessory sex gland in males. It is single in number, while the seminal vesicles and bulbourethral glands are paired.

Topic: Biology, Human Reproduction, NEET
Which of the following males are not heterogametic?

Options:
A Birds
B Drosophila
C Human
D Grasshopper

The correct answer is:
Birds

Solution:
Grasshopper is an example of an XO type of sex determination in which males have only one X chromosome beside autosomes, whereas females have a pair of X-chromosome. A large number of Insect show XO type of sex determination. While some of its sperm bear an X-chromosome and others do not have X-chromosome.

The XX/XY sex-determination system is the most familiar, as it is found in humans and Drosophila. In the system, females have two of the same kind of sex chromosome (XX), while males have two distinct sex chromosomes (XY).

The ZW sex-determination system is found in birds, reptiles, some insects and other organisms. The ZW sex-determination system is reversed compared to the XY system: females have two different kinds of chromosomes (ZW), and males have two of the same kind of chromosomes (ZZ).

Topic: Biology, Principles of Inheritance and Variation, NEET
Which of the following match is correct for the enzyme used to extract DNA?

Options:
A Plant cell - Cellulase
B Fungus - Chitinase
C Bacteria - Lysozyme
D More than one option is correct

The correct answer is:
More than one option is correct

Solution:
For extracting DNA from a cell it is first cut and opened by lysing enzyme which degrade cell wall and cell membrane. For plant cell, cell wall is degraded by cellulase and pectinase. Fungal cell wall is made up of chitin, thus chitinase is used. Bacterial cell wall is degraded by lysozyme.

Topic: Biology, Biotechnology - Principles and Processes, NEET
Which of the following matching is correct about excretory system in humans?

Options:
A Glomerular filtration rate: 180 l/day/both kidneys
B Glomerular filtration rate: 180 l/day/kidney
C Glomerular filtration rate: The blood filtrate is 100-200 mL/min/kidney
D Glomerular filtration rate: The blood filtrate is 200-300 mL/min/both kidneys

The correct answer is:
Glomerular filtration rate: 180 l/day/both kidneys

Solution:
GFR in an individual is 125 mL/minute or 180 liters/day in all the nephrons of both the kidneys. The glomerular filtration is also called ultrafiltration and on an average 1100-1200 mL of blood is filtered by the kidneys per minute.

Topic: Biology, Excretory Products and their Elimination, NEET
Which of the following material is not safe to prepare carry bags?

Options:
A Cloth
B Paper
C Jute
D Polythene

The correct answer is:
Polythene

Solution:
Plastic bags that are commonly used are made from a polymer known as polyethylene. The ethylene is commonly extracted from natural gases and polymerized to form long chains of carbon and hydrogen atoms. Polythene is non-biodegradable and hence, unsafe for the preparation of carrying bags.

Topic: Biology, Environmental Issues, NEET
Which of the following materials exhibits sublimation?

Options:
A Ice
B Ethyl alcohol
C Wax
D Camphor

The correct answer is:
Camphor

Solution:
Sublimation means on heating solid directly changes into vapour.

Ice	(solid - liquid)

Ethyl alcohol	(liquid – vapour)

Wax	(solid – liquid)

Camphor	(solid – vapour)

Topic: Chemistry, General Organic Chemistry, NEET
Which of the following materials exhibits sublimation?

Options:
A Ice
B Ethyl alcohol
C Wax
D Camphor

The correct answer is:
Camphor

Solution:
Sublimation: on heating solid directly changes into vapour.

Ice	(solid liquid)

Ethyl alcohol	(liquid – vapour)

Wax	(solid – liquid)

Camphor	(solid – vapour)

Topic: Chemistry, General Organic Chemistry, NEET
Which of the following materials is not an example of a diamagnetic substance?

Options:
A Benzene (C6H6)
B Sodium chloride (NaCl)
C Iron (Fe)
D Oxygen (O2)

The correct answer is:
Iron (Fe)

Solution:
Iron (Fe) is not an example of a diamagnetic substance; it is ferromagnetic.

Topic: Chemistry, Solid State, NEET
Which of the following measures can be effective in controlling water pollution?

Options:
A Dumping household chemicals directly into water bodies.
B Implementing proper waste disposal and recycling programs.
C Increasing industrial discharges into rivers and lakes.
D Using pesticides and herbicides without proper regulation.

The correct answer is:
Implementing proper waste disposal and recycling programs.

Solution:
Correct Option is : (B)
Implementing proper waste disposal and recycling programs.

Topic: Chemistry, Environmental Chemistry, NEET
Which of the following measures would you take to prevent water-borne diseases?

Options:
A provision of clean water for drinking
B industries should be prohibited from discharging wastes into water bodies
C frequent cleaning and disinfecting of water tanks and reservoirs
D all of the above

The correct answer is:
all of the above

Solution:
provision of clean water for drinking, industries should be prohibited from discharging wastes into water bodies, frequent cleaning and disinfecting of water tanks and reservoirs are some measures one can take to prevent water-borne diseases.

Topic: Biology, Human Health and Diseases, NEET
Which of the following mechanism help to exhale air out of the lungs?

Options:
A The relaxation of diaphragm.
B Contraction of external intercostal muscle
C The up lifting of sternum
D All of the above

The correct answer is:
The relaxation of diaphragm.

Solution:
During exhalation, the diaphragm is relaxed and dome-shaped, which help to reduce the volume of the thoracic cavity and thus facilitate exhalation. Active inspiration involves the contraction, the diaphragm and external intercostals. Scalenes - elevates the upper ribs. Sternocleidomastoid - elevates the sternum.

Topic: Biology, Breathing and Exchange of Gases, NEET
Which of the following mechanism/s help to increase the volume of the thoracic chamber?

Options:
A The contraction of diaphragm
B Contraction of external intercostal muscle
C The uplifting of sternum
D All of the above

The correct answer is:
All of the above

Solution:
Mechanism
A. Contraction of diaphragm → Volume of the thoracic chamber in the antero-posterior axis increases.
B. Contraction of external intercostal muscles → Ribs and the sternum are lifted up → Increase in the volume of the thoracic chamber in the dorso-ventral axis.
C. Increase in the thoracic volume → Increase in pulmonary volume → Decrease in the intra-pulmonary pressure.
D. Intra-pulmonary pressure becomes less than the atmospheric pressure. This forces the air from outside to move into the lungs (inspiration).

Topic: Biology, Breathing and Exchange of Gases, NEET
Which of the following member of the lanthanoid series does not exhibit +4 oxidation state?

Options:
A Ce
B Pr
C Eu
D Tb

The correct answer is:
Eu

Solution:
Correct Option is : (C)
Eu

Topic: Chemistry, d and f Block Elements, NEET
Which of the following members of the lanthanoid series does not exhibit +2 oxidation state?

Options:
A Dy
B Sm
C Tm
D Yb

The correct answer is:
Dy

Solution:
Correct Option is : (A)
Dy

Topic: Chemistry, d and f Block Elements, NEET
Which of the following metabolites is commonly produced during the breakdown of fats, carbohydrates, and proteins?

Options:
A Glucose 6 - phosphate
B Fructose 1,6-bisphosphate
C Pyruvic acid
D Acetyl-CoA

The correct answer is:
Acetyl-CoA

Solution:
Acetyl CoA is the common metabolite which is produced during the breakdown of fats, carbohydrate and proteins. Fatty acid break down to form acetyl CoA. Breakdown of carbohydrates form pyruvic acid oxidation of which forms acetyl CoA and breakdown of proteins forms amino acid which gets oxidized to form acetyl CoA.

Topic: Biology, Respiration in Plants, NEET
Which of the following metal carbonyl has structure in the diagram?

Options:
A Cr(CO) 6
B Mn 2 (CO) 10
C Fe2(CO)9
D Co 2 (CO) 8

The correct answer is:
Mn 2 (CO) 10

Solution:
Among the given homoleptic carbonyls, given shape is adopted by Mn 2 (CO) 10 .

Topic: Chemistry, Coordination Compounds, NEET
Which of the following metal ions act as the co-factor for carboxypeptidase?

Options:
A Calcium Ca2+
B Iron Fe2+Â
C Zinc Zn2+
D Manganese Mn2+

The correct answer is:
Zinc Zn2+

Solution:
Enzymes are composed of one or several polypeptide chains. However, there are a number of cases in which non-protein constituents called cofactors are bound to the the enzyme to make the enzyme catalytically active.
In these instances, the protein portion of the enzymes is called the apoenzyme. Three kinds of cofactors may be identified: prosthetic groups, co-enzymes and metal ions.
A number of enzymes require metal ions for their activity which form coordination bonds with side chains at the active site and at the same time form one or more cordination bonds with the substrate, e.g., zinc is a cofactor for the proteolytic enzyme carboxypeptidase.

Topic: Chemistry, Biomolecules, NEET
Which of the following metal is expected to have the highest third ionisastion enthalpy.

Options:
A CrZ=24
B V(Z=23)
C Mn(Z=25)
D Fe(Z=26)

The correct answer is:
Mn(Z=25)

Solution:
Mn had outer electronic configuration as 4s23d5 , first two electrons are removed from 4S- orbital, but the removal of 3rd electron is from half filled 3d- orbital, which requires higher ionization energy then other metal.

Topic: Chemistry, d and f Block Elements, NEET
Which of the following metal is extracted by the amalgamation process?

Options:
A Tin
B Silver
C Copper
D Zinc

The correct answer is:
Silver

Solution:
Cu2Cl2+Ag2S→Cu2S+2AgCl
2AgCl+2Hg→2Ag+ Hg 2 Cl 2

Topic: Chemistry, General Principles and Processes of Isolation of Metals, NEET
Which of the following metal on burning in moist air does not give smell of ammonia?

Options:
A Mg
B Ca
C Na
D Li

The correct answer is:
Na

Solution:
In 1 group only Li forms nitride and all II group metals form nitride.
3Mgâ+â N 2 â Mg 3 N 2 â H 2 Oââ(moist) Mgâ (OH) 2 â+â NH 3
3Ca +  N 2 → Ca 3 N 2 → H 2 O (moist) Ca(OH) 2  +  NH 3
3Li+12N2âLi3NâH2O(moist)LiOH+NH3
Na+N2â no reaction.

Topic: Chemistry, s Block Elements, NEET
Which of the following metal on burning with moist air does not give smell of ammonia?

Options:
A Mg
B Ca
C K
D Li

The correct answer is:
K

Solution:
Mg+ N 2 → Mg 3 N 2 → H 2 O Mg (OH) 2 +NH 3
Ca+N2âCa3N2âH2OCa(OH)2+NH3
Li+N2âLi3NâH2OLiOH+NH3
K+N2â no reaction
Hence, Potassium does not give smell of ammonia.

Topic: Chemistry, s Block Elements, NEET
Which of the following metal oxides can be thermally decomposed to produce dioxygen (O2)?

Options:
A CuO
B Ag2O
C HgO
D Fe2O3

The correct answer is:
Ag2O

Solution:
The paragraph mentions that the thermal decomposition of metal oxides of metals low in the electrochemical series, such as Ag2O, produces dioxygen.

Topic: Chemistry, p Block Elements (Group 15, 16, 17 & 18), NEET
Which of the following metals can be extracted by smelting?

Options:
A aluminium
B magnesium
C iron
D none of these

The correct answer is:
iron

Solution:
Iron can be extracted by smelting.

Topic: Chemistry, General Principles and Processes of Isolation of Metals, NEET
Which of the following metals can react with alcohols and phenols to yield alkoxides/phenoxides and hydrogen?

Options:
A Copper (Cu)
B Sodium (Na)
C Iron (Fe)
D Zinc (Zn)

The correct answer is:
Sodium (Na)

Solution:
Active metals like sodium can react with alcohols and phenols to produce alkoxides and phenoxides, along with the release of hydrogen gas.

Topic: Chemistry, Alcohols Phenols and Ethers, NEET
Which of the following metals cannot be extracted by carbon reduction process

Options:
A Pb
B Al
C Hg
D Zn

The correct answer is:
Al

Solution:
Al is highly electropositive. It can be obtained by electrolytic reduction.

Topic: Chemistry, General Principles and Processes of Isolation of Metals, NEET
Which of the following metals does not dissolve in liquid ammonia to form a deep blue-black solution?

Options:
A Calcium
B Magnesium
C Beryllium
D Barium

The correct answer is:
Beryllium

Solution:
Beryllium does not form a deep blue-black solution when dissolved in liquid ammonia, unlike other alkaline earth metals.

Topic: Chemistry, s Block Elements, NEET
Which of the following metals is commonly used as a catalyst in alkane pyrolysis?

Options:
A Gold
B Silver
C Platinum
D Copper

The correct answer is:
Platinum

Solution:
Platinum is one of the commonly used metals as a catalyst in alkane pyrolysis reactions.

Topic: Chemistry, Hydrocarbons, NEET
Which of the following metals is commonly used for the reduction of nitro compounds to amines?

Options:
A Gold (Au)
B Iron (Fe)
C Silver (Ag)
D Copper (Cu)

The correct answer is:
Iron (Fe)

Solution:
Iron is commonly used for the reduction of nitro compounds to amines, particularly in the presence of hydrochloric acid. The iron scrap catalyses the reduction reaction.

Topic: Chemistry, Amines, NEET
Which of the following metals is known to catalyze the hydrogenation of alkenes and alkynes at room temperature?

Options:
A Gold
B Platinum
C Copper
D Iron

The correct answer is:
Platinum

Solution:
Platinum is one of the catalysts commonly used to catalyze the hydrogenation of alkenes and alkynes at room temperature.

Topic: Chemistry, Hydrocarbons, NEET
Which of the following metals is not commonly used as a catalyst for the hydrogenation of alkenes and alkynes?

Options:
A Platinum
B Nickel
C Gold
D Palladium

The correct answer is:
Gold

Solution:
Gold is not commonly used as a catalyst for the hydrogenation of alkenes and alkynes; instead, platinum, palladium, and nickel are more commonly employed for this purpose.

Topic: Chemistry, Hydrocarbons, NEET
Which of the following metals is NOT commonly used as a catalyst for the reduction of nitro compounds to amines?

Options:
A Palladium
B Platinum
C Iron
D Gold

The correct answer is:
Gold

Solution:
Gold is not commonly used as a catalyst for the reduction of nitro compounds.

Topic: Chemistry, Amines, NEET
Which of the following metals is often used as a catalyst in the hydrogenation of vegetable oils to produce solid fats?

Options:
A Copper
B Iron
C Nickel
D Gold

The correct answer is:
Iron

Solution:
Iron is often used as a catalyst in the hydrogenation of vegetable oils to produce solid fats, such as margarine.

Topic: Chemistry, Hydrocarbons, NEET
Which of the following metals reacts with chlorine to form aluminum chloride (AlCl3)?

Options:
A Sodium (Na)
B Iron (Fe)
C Magnesium (Mg)
D Aluminum (Al)

The correct answer is:
Aluminum (Al)

Solution:
Aluminum reacts with chlorine to form aluminum chloride (AlCl3).

Topic: Chemistry, p Block Elements (Group 15, 16, 17 & 18), NEET
Which of the following method is useful for increasing the rate of pollination and facilitating higher crop yield?

Options:
A Apiculture
B Sericulture
C Dairying
D Fishery

The correct answer is:
Apiculture

Solution:
Apiculture or beekeeping is the care and management of honey bees for the production of honey and the wax. This method is useful for increasing the rate of pollination and facilitating higher crop yield.

Topic: Biology, Strategies for Enhancement in Food Production, NEET
Which of the following method of animal breeding, superior male of one breed are mated with superior females of another breed to form progeny hybrid?

Options:
A Cross-breeding
B Out-crossing
C Inbreeding
D Interspecific hybridization

The correct answer is:
Cross-breeding

Solution:
The cross-breeding method of animal breeding, superior male of one breed are mated with superior females of another breed. It allows the desirable qualities of two different breeds to be combined. Hisardale is new breed of ship developed by this method in Punjab by crossing Bikaneri ewes and Merino rams.

Topic: Biology, Strategies for Enhancement in Food Production, NEET
Which of the following method of contraception is effective only upto a maximum period of six months following parturition?

Options:
A Coitus interruptus
B Lactational amenorrhea
C Periodic abstinance
D Condoms

The correct answer is:
Lactational amenorrhea

Solution:
Lactational amenorrhea (absence of menstruation) method is based on the fact that ovulation and therefore the cycle do not occur during the period of intense lactation following parturition. Therefore, as long as the mother breast-feeds the child fully, chances of conception are almost nil. However, this method has been reported to be effective only upto a maximum period of six months following parturition. As no medicines or devices are used in these methods, side effects are almost nil. Chances of failure, though, of this method are also high.

Topic: Biology, Reproductive Health, NEET
Which of the following method would not produce clones?

Options:
A Double fertilization
B Apomixis
C Vegetative reproduction
D Tissue culture

The correct answer is:
Double fertilization

Solution:
The term clone is used to describe morphologically and genetically similar individuals. In vegetative reproduction, tissue culture and apomixes only single parent is involved, thus the offsprings produced are not only identical to one another but are exact copies of their parent. Thus are referred as clones.

Topic: Biology, Reproduction in Organisms, NEET
Which of the following methods are used to carry out controlled breeding experiments?

Options:
A Cross-breeding
B Artificial insemination
C Interspecific hybridization
D Out-crossing

The correct answer is:
Artificial insemination

Solution:
Controlled breeding experiments are carried out using artificial insemination. The semen is collected from the male that is chosen as a parent and injected into the reproductive tract of the selected female by the breeder. The semen may be used immediately or can be frozen and used at a later date. It can also be transported in a frozen form to where the female is housed. In this way desirable matings are carried. Artificial insemination helps us overcome several problems of normal matings.

Topic: Biology, Strategies for Enhancement in Food Production, NEET
Which of the following methods can be used for making the bacterial cell "competent"?

Options:
A Treating with a specific concentration of divalent cation (Ca+2)
B Treating with a specific concentration of monovalent cation (K+)
C Heat shock/electric current of high voltage
D Both A and C

The correct answer is:
Both A and C

Solution:
In order to force bacteria to take up the plasmid, the bacterial cells must first be made âcompetentâ to take up DNA. This is done by treating them with a specific concentration of a divalent cation, such as calcium, which increases the efficiency with which DNA enters the bacterium through pores in its cell wall. Recombinant DNA can then be forced into such cells by incubating the cells with recombinant DNA on ice, followed by placing them briefly at 42oC (heat shock), and then putting them back on ice. This enables the bacteria to take up the recombinant DNA.

Topic: Biology, Biotechnology - Principles and Processes, NEET
Which of the following methods can be used to prepare very pure nitrogen?

Options:
A The thermal decomposition of ammonium dichromate
B The thermal decomposition of sodium or barium azide
C Both A and B
D None of the above

The correct answer is:
Both A and B

Solution:
The paragraph states that very pure nitrogen can be obtained by the thermal decomposition of ammonium dichromate or sodium or barium azide.

Topic: Chemistry, p Block Elements (Group 15, 16, 17 & 18), NEET