datavorous/entrance-exam-dataset huggingface dataset:
Which of the following is a key step in the formation of an alkyne from vicinal dihalides?

Options:
A Addition of water
B Hydrogenation
C Dehydrohalogenation
D Oxidation

The correct answer is:
Dehydrohalogenation

Solution:
Dehydrohalogenation is a key step in the formation of an alkyne from vicinal dihalides.

Topic: Chemistry, Hydrocarbons, NEET
Which of the following is a laboratory method for the preparation of dinitrogen?

Options:
A The liquefaction and fractional distillation of air
B The treatment of an aqueous solution of ammonium chloride with sodium nitrite
C The thermal decomposition of ammonium dichromate
D The thermal decomposition of sodium or barium azide

The correct answer is:
The liquefaction and fractional distillation of air

Solution:
The paragraph states that dinitrogen can be prepared in the laboratory by treating an aqueous solution of ammonium chloride with sodium nitrite.

Topic: Chemistry, p Block Elements (Group 15, 16, 17 & 18), NEET
Which of the following is a limitation of the Octet Rule?

Options:
A The Octet Rule is universally applicable to all chemical compounds and elements.
B The Octet Rule cannot explain the formation of molecules with an odd number of electrons.
C The Octet Rule accurately predicts the geometry of all molecules.
D The Octet Rule is a strict guideline that does not allow for any exceptions in chemical bonding.

The correct answer is:
The Octet Rule cannot explain the formation of molecules with an odd number of electrons.

Solution:
Correct Option is : (B)
The Octet Rule cannot explain the formation of molecules with an odd number of electrons.

Topic: Chemistry, Chemical Bonding and Molecular Structure, NEET
Which of the following is a living cell which lacks nucleus on maturity?

Options:
A Complementary cell
B Mature sieve tube element
C Mature vessel element
D Companion cell

The correct answer is:
Mature sieve tube element

Solution:
Seive tube element possesses a peripheral cytoplasm and a large vacuole but lacks a nucleus. The functions of sieve tubes are controlled by nucleus of companion cells. Mature vessel elements are dead cells which lacks both nucleus and cytoplasm on maturity.

Topic: Biology, Anatomy of Flowering Plants, NEET
Which of the following is a macronutrient?

Options:
A Molybdenum
B Calcium
C Zinc
D Manganese

The correct answer is:
Calcium

Solution:
Macronutrients (macro-elements or major-elements) are required by plants in larger amounts (generally present in the plant tissues in concentrations of 1 to 10mg/gram of dry matter). Carbon, hydrogen, nitrogen, oxygen, phosphorous, potassium, calcium, sulfur, and magnesium are the nine macroelements in plants.

Topic: Biology, Mineral Nutrition, NEET
Which of the following is a major cause of loss of biodiversity?

Options:
A Habitat loss and fragmentation
B Over-exploitation
C Alien species invasion
D Co-extinction

The correct answer is:
Habitat loss and fragmentation

Solution:
There are four major causes of biodiversity loss know as "Evil Quartet". Habitat loss and fragmentation is most important cause driving animals and plants to extinction. Tropical rain forest once covering more than 14% of the earth's land surface, these rain forest now covers no more than 6%.

Topic: Biology, Biodiversity and its Conservation, NEET
Which of the following is a major characteristic of the transition elements?

Options:
A They exhibit a variety of oxidation states.
B They primarily form ionic compounds.
C They are located in the s-block of the periodic table.
D They have a completely filled d-subshell.

The correct answer is:
They exhibit a variety of oxidation states.

Solution:
Correct Option is : (A)
They exhibit a variety of oxidation states.

Topic: Chemistry, d and f Block Elements, NEET
Which of the following is a major component of oral contraceptive pills?

Options:
A HCG
B LH
C FSH
D Progesterone

The correct answer is:
Progesterone

Solution:
Oral contraceptive pills are birth control pills that are used to prevent pregnancy. Estrogen and progestin are two female sex hormones which work in preventing ovulation. Progesterone plays a primary role in preventing pregnancy and estrogen controls menstrual bleeding. These hormones change the lining of the uterus and also prevent the sperm from entering it.

Topic: Biology, Reproductive Health, NEET
Which of the following is a marine water pollinated plant?

Options:
A Vallisneria
B Hydrilla
C Egeria
D Zostera

The correct answer is:
Zostera

Solution:
Some examples of water pollinated plants are Vallisneria and Hydrilla which grow in freshwater and several marine sea-grasses such as Zostera. Not all aquatic plants use water for pollination.

Topic: Biology, Sexual Reproduction in Flowering Plants, NEET
Which of the following is a meta directing group with a strong electron-withdrawing effect?

Options:
A -CH3
B -NH2
C -NO2
D -OH

The correct answer is:
-NO2

Solution:
-NO2 is a meta directing group with a strong electron-withdrawing effect, which makes it effective at directing substituents to the meta position in electrophilic aromatic substitution reactions.

Topic: Chemistry, Hydrocarbons, NEET
Which of the following is a method for birth control?

Options:
A IUDs
B GIFT
C ICSI
D IVF-ET

The correct answer is:
IUDs

Solution:
Intrauterine devices are the most common contraceptive device used in India.

Topic: Biology, Reproductive Health, NEET
Which of the following is a method of birth control?

Options:
A IUD
B IUI
C ICSI
D GIFT

The correct answer is:
IUD

Solution:
The full form of IUD is an intrauterine device. It is a device inserted through vaginal in the uterus. It is used to delay pregnancy in females. Intrauterine contraceptive devices (IUCD) are plastic or metal objects placed in the uterus by a doctor. These include loop, cooper-T, spirals, ring, bowl, shield, etc. IUDs increase phagocytosis of sperms within the uterus and the Cu ions released suppress sperm motility and the fertilizing capacity of sperms. Infertility cases either due to the inability of the male partner to inseminate the female or due to very low sperm counts in the ejaculates could be corrected by artificial insemination (AI) technique. In this technique, the semen collected either from the husband or a healthy donor is artificially introduced either into the vagina or into the uterus (IUI – intra-uterine insemination) of the female. GIFT stands for Gamete Intra-Fallopian Transfer. In this method an ovum from a female and sperms from a male are directly transferred into the upper regions of Fallopian tube of a female who can provide suitable environment for fertilization and development. Intra cytoplasmic sperm injection (ICSI) is another specialised procedure to form an embryo in the laboratory in which a sperm is directly injected into the ovum.

Topic: Biology, Reproductive Health, NEET
Which of the following is a method of preparation of potassium permanganate?

Options:
A Heating potassium chloride with potassium hydroxide.
B Reacting potassium dichromate with sulphuric acid.
C Treating potassium sulfate with potassium chloride.
D Oxidizing manganese dioxide fused with KOH with potassium chlorate in an acidic solution.

The correct answer is:
Oxidizing manganese dioxide fused with KOH with potassium chlorate in an acidic solution.

Solution:
Correct Option is : (D)
Oxidizing manganese dioxide fused with KOH with potassium chlorate in an acidic solution.

Topic: Chemistry, d and f Block Elements, NEET
Which of the following is a method utilized to get rid of particulate matter present in the exhaust from a thermal power plant?

Options:
A Magnetic precipitator
B Chromatography
C Electrostatic precipitator
D Mass spectrometry

The correct answer is:
Electrostatic precipitator

Solution:
A filtration device to remove fine particles, dust and smoke from gases using high voltage electrostatic charge is called electrostatic precipitator. It collects the fine particles on collecting plates.

Topic: Biology, Environmental Issues, NEET
Which of the following is a mismatched pair?

Options:
A Species-area graph - parabola
B Equator - increased species diversity
C Species richness - related to explored geographical area
D Speciation - function of time

The correct answer is:
Species-area graph - parabola

Solution:
During his pioneering and extensive explorations in the wilderness of South American jungles, the great German naturalist and geographer Alexander von Humboldt observed that within a region species richness increased with increasing explored area, but only up to a limit. In fact, the relation between species richness and area for a wide variety of taxa (angiosperm plants, birds, bats, freshwater fishes) turns out to be a rectangular hyperbola.
On a logarithmic scale, the relationship is a straight line described by the equation
log S = log C + Z log A
where S= Species richness A= Area Z = slope of the line (regression coefficient) C = Y-intercept

Topic: Biology, Biodiversity and its Conservation, NEET
Which of the following is a moderately deactivating group in electrophilic aromatic substitution reactions?

Options:
A Amino (-NH2) group
B Nitro (-NO2) group
C Hydroxyl (-OH) group
D Methyl (-CH3) group

The correct answer is:
Nitro (-NO2) group

Solution:
The nitro (-NO2) group is moderately deactivating in electrophilic aromatic substitution reactions due to its strong -M effect and -I effect, which reduces electron density on the benzene ring.

Topic: Chemistry, Hydrocarbons, NEET
Which of the following is a natural polymer?

Options:
A poly (Butadiene-styrene)
B polybutadiene
C poly (Butadiene-acrylonitrile)
D cis-1, 4-polyisoprene

The correct answer is:
cis-1, 4-polyisoprene

Solution:
Natural rubber is a polymer of isoprene. The chemical name of isoprene is 2-methyl-1,3-butadiene and its chemical formula is CH2=C(CH3)−CH=CH2. Isoprene is a liquid that is colourless and volatile. As we can see from the formula it has two double bonds.
So answer is cis-1,4-polyisoprene

Topic: Chemistry, Polymers, NEET, NEET 2020 (Phase 1)
Which of the following is a naturally occurring growth inhibitor?

Options:
A IAA
B ABA
C NAA
D GA

The correct answer is:
ABA

Solution:
Abscisic acid (ABA) is a growth inhibitor and are produced in plants during abscission. IAA, NAA and GA are growth promoters inducing cell division.

Topic: Biology, Plant - Growth and Development, NEET
Which of the following is a necessary condition for the dehydrohalogenation of vicinal dihalides?

Options:
A Presence of water
B Treatment with strong acids
C Treatment with alcoholic potassium hydroxide
D Exposure to sunlight

The correct answer is:
Treatment with alcoholic potassium hydroxide

Solution:
Dehydrohalogenation of vicinal dihalides requires the treatment with alcoholic potassium hydroxide to eliminate one molecule of hydrogen halide.

Topic: Chemistry, Hydrocarbons, NEET
Which of the following is a negatively charged amino acid?

Options:
A Valine
B Lysine
C Phenylalanine
D Glutamic acid

The correct answer is:
Glutamic acid

Solution:
Based on the number of amino and carboxyl groups, amino acids are classified as acidic/negative (e.g., glutamic acid), basic/positive (lysine), and neutral (valine) amino acids. Similarly, there are aromatic amino acids (tyrosine, phenylalanine, tryptophan).

Topic: Chemistry, Biomolecules, NEET
Which of the following is a neurosecretory part of brain?

Options:
A The hypothalamus
B The amygdala
C The optic area
D The satiety center

The correct answer is:
The hypothalamus

Solution:
Hypothalamus control a number of centres that control body temperature urge for eating and drinking. It also contain several groups of neurosecratory cells that secrete hormones called as hypothalamic hormones. Along with limbic system, hypothalamus is also involved in the regulation of sexual behavior expression of emotional reaction and motivation. It is related to another gland called as hypophydsis or pituitary gland. It forms basically the neurohypophysis portion of the pituitary.

Topic: Biology, Neural Control and Coordination, NEET
Which of the following is a nitrogen-containing compound that can be manufactured from dinitrogen?

Options:
A Ammonia.
B Calcium cyanamide.
C Both A and
B)
D Neither A nor
B)

The correct answer is:
Both A and
B)

Solution:
The paragraph states that dinitrogen can be used to manufacture ammonia and calcium cyanamide. Ammonia is a key ingredient in the production of fertilizers and other chemicals. Calcium cyanamide is a fertilizer and a pesticide.

Topic: Chemistry, p Block Elements (Group 15, 16, 17 & 18), NEET
Which of the following is a non-point source of pollution?

Options:
A Industrial discharge pipes
B Acid rain from volcanic emissions
C Agricultural runoff from farmlands
D Municipal sewage treatment plants

The correct answer is:
Agricultural runoff from farmlands

Solution:
Agricultural runoff from farmlands is a non-point source of pollution because it cannot be easily traced to a specific source.

Topic: Chemistry, Environmental Chemistry, NEET
Which of the following is a non-steroidal oral contraceptive?

Options:
A LNG-20
B Progesterone only pills
C MALA-N
D Saheli

The correct answer is:
Saheli

Solution:
Saheli or ormeloxifene or centchroman is a selective estrogen receptor modulator. It is a âonce a weekâ pill with very few side effects and high contraceptive value. It was developed by scientists at Central Drug Research Institute (CDRI) in Lucknow, India.

Topic: Biology, Reproductive Health, NEET
Which of the following is a non-symbiotic biofertilizer?

Options:
A Mycorrhizae
B Azotobacter
C Anabaena
D Rhizobium

The correct answer is:
Azotobacter

Solution:
NH4âNitrosomonasNO2 âNitrobacterNO3 .

Azotobacter is a non-symbiotic biofertilizer. They are aerobic, free-living soil microbes. They play an important role in the nitrogen cycle in nature, binding atmospheric nitrogen which is inaccessible to plants. They release it in the form of ammonium ions into the soil. Therefore, they are used by humans for the production of biofertilizers.

Rest of the options are symbiotic.

Topic: Biology, Microbes in Human Welfare, NEET
Which of the following is a n-type semiconductor?

Options:
A Doping if Si in Si
B Doping if Al in Si
C Doping if P in Si
D None of the above

The correct answer is:
Doping if P in Si

Solution:
Correct Option is : 3
Doping if P in Si

Topic: Chemistry, Solid State, NEET
Which of the following is a nucleoside?

Options:
A Adenine
B Thymine
C Cytidine
D Cytosine

The correct answer is:
Cytidine

Solution:
Cytidine is a nucleoside

Topic: Biology, Molecular Basis of Inheritance, NEET
Which of the following is a nucleoside?

Options:
A Adenylic acid
B Cytosine
C Uridine
D Thiamine

The correct answer is:
Uridine

Solution:
Nucleotide =Nucleoside + Phosphate group
Nucleoside = Nucleobase + Five carbon sugar
Uridine is a glycosylated pyrimidine analog containing uracil attached to a ribose ring. As it is doesn't contain a phosphate group, it is called a nucleoside.
Adenylic acid is Adenosine monophosphate; Cytosine is a nucleotide whereas thiamine is a vitamin B1.

Topic: Chemistry, Biomolecules, NEET
Which of the following is a nucleotide?

Options:
A Uridine
B Adenylic acid
C Guanine
D Guanosine

The correct answer is:
Adenylic acid

Solution:
Uridine is a nucleoside. Thus, option (1) is incorrect.
Adenylic acid is a nucleotide. Thus, option (2) is correct.
Guanine is a nitrogenous base. Thus, option (3) is incorrect.
Guanosine is a nucleoside. Thus, option (4) is incorrect.

Topic: Biology, Biomolecules (B), NEET, NEET 2024 (Re-NEET)
Which of the following is a pair of analogous organs?

Options:
A Contractile vacuole in Amoeba and uriniferous tubule in frog
B Paddle of whale and front legs of horse
C Thorn of Bougainvillea and tendrils of Cucurbita
D Forelimbs in lizard and wings in birds

The correct answer is:
Contractile vacuole in Amoeba and uriniferous tubule in frog

Solution:
Contractile vacuole in Amoeba and uriniferous tubule in a frog are analogous organs. Analogous organs have different origins and structures but have the same function. Similarity on the basis of the same function is called an analogy. Both contractile vacuoles and uriniferous tubules are concerned with osmoregulation.

Topic: Biology, Evolution, NEET
Which of the following is a pair of bacterial diseases?

Options:
A Typhoid and Pneumonia
B Malaria and AIDS.
C Ringworm and AIDS
D Common cold and Malaria

The correct answer is:
Typhoid and Pneumonia

Solution:
Typhoid is caused by pathogenic bacterium Salmonella typhi. It is spread by contaminated food and water.
Pneumonia is caused by bacteria Streptococcus pneumonia and Haemophilus influenza. It is spread by inhaling droplets/aerosol from infected persons and sharing glasses and utensils with an infected person.

Topic: Biology, Human Health and Diseases, NEET
Which of the following is a pair of freshwater variety of fish?

[Rohu, Catla, Mackerel, Pomfret, Bombay duck]

Options:
A Rohu and Catla
B Mackerel and Catla
C Mackerel and Pomfret
D Bombay Duck and Pomfret

The correct answer is:
Rohu and Catla

Solution:
Their scales are bigger unlike marine fish which has small scales.
They lack Poly Unsaturated Fatty Acids unlike marine fish which have them.

Topic: Biology, Strategies for Enhancement in Food Production, NEET
Which of the following is a pair of geometric isomers?
(I)
(II)
(III)
(IV)

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

The correct answer is:
I and IV

Solution:
Z form
priority
-Br>-Cl
-CH3>-H
E from
Priority
-Br>H
-Cl>-CH3
E- from
Priority
-Cl>H
-Br>CH3
E- from
Priority
-Br>-Cl
-CH3>H
(i) & (iv) are Geometrical isomer
i & ii are positional isomers
i & iii are positional isomers
ii & iii are positional isomers

Topic: Chemistry, General Organic Chemistry, NEET
Which of the following is a pair of viral diseases?

Options:
A Ringworm, AIDS
B Common cold, AIDS
C Dysentery, common cold
D Typhoid, tuberculosis

The correct answer is:
Common cold, AIDS

Solution:
Common cold and AIDS are viral diseases, occur due to Myxo virus and Human Immunodeficiency Virus (HIV) respectively. The causative agents of ringworm disease are fungi Trichophyton and Microsporum. Typhoid and tuberculosis are bacterial diseases caused by Salmonella typhi and Mycobacterium tuberculosis respectively.

Topic: Biology, Human Health and Diseases, NEET, NEET 2009 (Screening)
Which of the following is a palindromic sequence?

Options:
A 5 â² - CGTATG - 3 â²
5 â² - GCATAC - 3 â²
B 5 ′ - CGAATG - 3 ′
3 ′ - CGAATG - 5 ′
C 5 â² - GAATTC - 3 â²
3 â² - CTTAAG - 5 â²
D 5 ′ - GACTAC - 3 ′
3 ′ - TACGAC - 5 ′

The correct answer is:
5 ′ - GAATTC - 3 ′
3 ′ - CTTAAG - 5 ′

Solution:
The palindromes in DNA are base pair sequences that are the same when reading forward (left to right) or backward (right to left) from a central axis of symmetry. The following sequence reads the same on the two strands in 5 â² â 3 â² direction. This is also true when we read in the 3 â² â 5 â² directions.

Restriction endonuclease enzymes recognize palindromic sequences in DNA and cut them.

Topic: Biology, Biotechnology - Principles and Processes, NEET
Which of the following is a part of the pectoral girdle?

Options:
A Glenoid cavity
B Sternum
C Ilium
D Acetabulum

The correct answer is:
Glenoid cavity

Solution:
Glenoid cavity is a shallow concavity on the lateral side of pectoral girdle in which the head of humerus fits making the shoulder joint.

Topic: Biology, Locomotion and Movement, NEET
Which of the following is a physical property of dinitrogen?

Options:
A It is a colorless gas.
B It is odorless.
C It is tasteless.
D It is non-toxic.

The correct answer is:
It is non-toxic.

Solution:
The paragraph states that dinitrogen is a colorless, odorless, tasteless, and non-toxic gas.

Topic: Chemistry, p Block Elements (Group 15, 16, 17 & 18), NEET
Which of the following is a plasmid?

Options:
A pBR322
B BamHIl
C SalI
D EcoRII

The correct answer is:
pBR322

Solution:
pBR322 is the first plasmid vector developed by Bolivar and Rodrigues to transfer gene of interest to desire host cell. BamHI, SalI and EcoRII are restriction endonucleases, which are used to cut specific DNA segments.

Topic: Biology, Biotechnology - Principles and Processes, NEET
Which of the following is a polar molecule?

Options:
A $\mathrm{BF}_3$
B $\mathrm{SF}_4$
C $\mathrm{SiF}_4$
D $\mathrm{XeF}_4$

The correct answer is:
$\mathrm{SF}_4$

Solution:
Symmetrical molecules are generally non-polar although they have polar bonds. This is because bond dipole of one bond is cancelled by that of the other. $\mathrm{BF}_3, \mathrm{SiF}_4$ and $\mathrm{XeF}_4$ being symmetrical as non-polar. $\mathrm{SF}_4$ is unsymmetrical because of the presence of a lone pair of electrons. Due to which it is a polar molecule.

Topic: Chemistry, Chemical Bonding and Molecular Structure, NEET, NEET 2013 (All India)
Which of the following is a polar molecule?

Options:
A SF4
B SiF4
C XeF4
D BF3

The correct answer is:
SF4

Solution:
Here SF4 is polar as net dipole moment is positive in it while in all other thre net dipole moment is zero so they are non-polar.

Topic: Chemistry, Chemical Bonding and Molecular Structure, NEET
Which of the following is a positively charged sol?

Options:
A Silver sol
B $\mathrm{Sb}_2 \mathrm{~S}_3 \mathrm{SOl}$
C Methylene blue sol
D Congo red sol

The correct answer is:
Methylene blue sol

Solution:
- Methylene Blue sol is a positively charged sol.
- $\quad$ Silver sol, $\mathrm{Sb}_2 \mathrm{~S}_3$ sol and congo red sol are negatively charged sol.

Topic: Chemistry, Surface Chemistry, NEET, NEET 2023 (Manipur)
Which of the following is a potential application of Kolbe's electrolytic method?

Options:
A Production of oxygen gas
B Synthesis of organic peroxides
C Electroplating of metals
D Conversion of alkanes to alkenes

The correct answer is:
Synthesis of organic peroxides

Solution:
The Kolbe's electrolytic method can be used for the synthesis of organic peroxides, as it involves the formation of radicals and subsequent reactions.

Topic: Chemistry, Hydrocarbons, NEET
Which of the following is a product of alkane pyrolysis that is commonly used in the petrochemical industry?

Options:
A Methane
B Ethane
C Propane
D Butane

The correct answer is:
Methane

Solution:
Methane is a product of alkane pyrolysis and is commonly used in the petrochemical industry for various applications.

Topic: Chemistry, Hydrocarbons, NEET
Which of the following is a property of interstitial defect?

Options:
A Caused by vacant lattice site
B Caused by atoms occupying interstitial site
C Occurs in ionic solids
D Increases the density of solids

The correct answer is:
Caused by atoms occupying interstitial site

Solution:
Correct Option is : 2
Caused by atoms occupying interstitial site

Topic: Chemistry, Solid State, NEET
Which of the following is a pseudohalide?

Options:
A I3-
B IB7
C CN-
D ICl

The correct answer is:
CN-

Solution:
CN- resembles Cl- , Br- and I- in the following respects
(i) It forms HCN
(ii) It can be oxidized to form (CN) 2
(iii) AgCN is insoluble in water, but soluble in NH3 as is AgCl.

Topic: Chemistry, p Block Elements (Group 15, 16, 17 & 18), NEET
Which of the following is a p-type semiconductor?

Options:
A Doping if Si in Si
B Doping if Al in Si
C Doping if P in Si
D None of the above

The correct answer is:
Doping if Al in Si

Solution:
Correct Option is : 2
Doping if Al in Si

Topic: Chemistry, Solid State, NEET