datavorous/entrance-exam-dataset huggingface dataset:
State a condition under which a bimolecular reaction is kinetically first order reaction.

Options:
A Bimolecular reaction becomes kinetically first order when one of the products and reactants are in the same amount.
B Bimolecular reaction becomes kinetically first order when one of the reactants is in excess.
C Bimolecular reaction becomes kinetically first order when one of the products is in excess.
D None of the above

The correct answer is:
Bimolecular reaction becomes kinetically first order when one of the reactants is in excess.

Solution:
Correct Option is : (B)
Bimolecular reaction becomes kinetically first order when one of the reactants is in excess.

Topic: Chemistry, Chemical Kinetics, NEET
State as to why a solution of Na2CO3is alkaline?

Options:
A Na2CO3reacts with water to form sodium hydroxide and carbon dioxide.
B Na2CO3dissociates in water to release hydroxide ions.
C Na2CO3reacts with water to form sodium carbonate and hydroxide ions.
D Na2CO3reacts with water to form sodium hydroxide and bicarbonate ions.

The correct answer is:
Na2CO3reacts with water to form sodium carbonate and hydroxide ions.

Solution:
Correct Option is : (C)
Na2CO3reacts with water to form sodium carbonate and hydroxide ions.

Topic: Chemistry, s Block Elements, NEET
State as to why alkali metals are prepared by electrolysis of their fused chlorides?

Options:
A Fused chlorides have a lower melting point compared to other salts.
B Chlorides provide a source of halogen gas during the electrolysis process.
C Chlorides are stable and do not undergo unwanted side reactions during electrolysis.
D Chlorides have a high electrical conductivity when melted.

The correct answer is:
Chlorides have a high electrical conductivity when melted.

Solution:
Correct Option is : (D)
Chlorides have a high electrical conductivity when melted.

Topic: Chemistry, s Block Elements, NEET
State functions in thermodynamics are independent of the path taken by the system during a process. Why is this property important in thermodynamic calculations?

Options:
A It simplifies the calculation of kinetic energy.
B It ensures that the system always reaches equilibrium.
C It allows for accurate tracking of particle movements.
D It allows for the prediction of changes in a system's properties without needing to know the exact process.

The correct answer is:
It allows for the prediction of changes in a system's properties without needing to know the exact process.

Solution:
State functions being independent of the path taken by the system allows for predictions of changes in a system's properties without requiring detailed knowledge of the process.

Topic: Chemistry, Thermodynamics (C), NEET
State functions in thermodynamics depend on the state of the system and:

Options:
A The initial conditions of the system
B The history of the system
C The path taken by the system during a process
D The surroundings of the system

The correct answer is:
The history of the system

Solution:
State functions in thermodynamics depend on the state of the system and its history.

Topic: Chemistry, Thermodynamics (C), NEET
State the function of the gap junction found in the epithelium.

Options:
A Performing the job of adhesion to keep neighbouring cells together.
B Enabling relay of substances between adjoining cells by connecting cytoplasm for rapid transfer of ions, small molecules.
C Not allowing the cells to come in contact with each other.
D Preventing leakage of substances over and around tissue.

The correct answer is:
Enabling relay of substances between adjoining cells by connecting cytoplasm for rapid transfer of ions, small molecules.

Solution:
Epithelial tissue are the type of tissue found in animal, which provide a lining or covering over other parts of the body. These tissues have certain connecting links, which give structural as well as functional support called as junctions. There are three types:
1. Tight junctions: They are present between cells. They support to prevent any leaks of material which is not required across the tissue and also in a way keep cells separate.
2. Adhering junctions: As the name suggests, they do the job of adhesion between cells, keeping it together.
3. Gap junctions: They are found in epithelial tissue and provide transport of material, viz., ions transport, small molecules, water etc., between adjacent cells.

Topic: Biology, Structural Organisation in Animals, NEET
State the monomer of Teflon.

Options:
A CH2=CH . Cl
B CF2=CF2
C CH2=CH.CN
D CH 2 = C | Cl - CH = CH 2

The correct answer is:
CF2=CF2

Solution:
Polytetrafluoro ethylene (PTFE) is better known by the trade name Teflon.
PTFE is a vinyl polymer, and its structure, if not its behavior, is similar to polyethylene.
PTFE is made from the monomer tetrafluoro ethylene by free radical vinyl polymerization.
Tetrafluoro ethylene

Topic: Chemistry, Polymers, NEET
State variables or state functions in thermodynamics depend on:

Options:
A The path taken by the system during a process
B The nature of the system
C The state of the surroundings
D The microscopic properties of the system

The correct answer is:
The nature of the system

Solution:
State variables or state functions depend on the nature of the system.

Topic: Chemistry, Thermodynamics (C), NEET
State whether the following statements are true or false regarding androecium.

I. The anther of all angiosperms has four theca.
II. The outermost layer of the microsporangium is the tapetum.
III. The distal end of the filament is attached to the stamen.
IV. Pollen grains of the same species differ from each other in their morphologies.

Options:
A I - True, II - True, III - True, IV - False
B I - False, II - False, III - False, IV - True
C I - False, II - False, III - True, IV - False
D I - True, II - False, III - False, IV - True

The correct answer is:
I - False, II - False, III - True, IV - False

Solution:
An majority of the angiosperm anther is bilobed and every lobe has two theca so in all there are four theca. However, in Malvaceae family, anther is monothecous and has two theca only.
The innermost layer of the microsporangia is tapetum and it nourishes the developing pollen grains.
The distal end i.e. the farther end of the filament is attached to the stamen.
Pollen grains of the same species will have same morphology.

Topic: Biology, Sexual Reproduction in Flowering Plants, NEET
State whether the following statements are true (T) or false (F) and choose the accurate option.
(i) Abortions could happen spontaneously.
(ii) Infertility is the inability to produce viable offspring due to defects in the female partner only.
(iii) Complete lactation could help in contraception.
(iv) Creating awareness can help create a reproductively healthy society.

Options:
A iiiiiiivFFTT
B iiiiiiivFTFT
C iiiiiiivTFTT
D (i)(ii)(iii)(iv)TTFF

The correct answer is:
iiiiiiivTFTT

Solution:
Statements (i), (iii) and (iv) are true. Infertility is the inability to produce viable offspring due to defects in either male or female or both the partners.

Topic: Biology, Reproductive Health, NEET
State which of the following is not true.

A. Dominance is an autonomous feature of a gene or the product that it has information for.
B. A single gene product may produce only one effect.
C. Blood group AB is an example of codominance.
D. More than two alleles exist in a population for a single gene.

Options:
A C and D
B A and C
C B and D
D A and B

The correct answer is:
A and B

Solution:
Dominance is not an autonomous feature of a gene or the product that it has information for. It depends as much on the gene product and the production of a particular phenotype from this product as it does on the particular phenotype, in case more than one phenotype is influenced by the same gene. Occasionally, a single gene product may produce more than one effect.

Topic: Biology, Principles of Inheritance and Variation, NEET
State which of the following statements are true:

(i) p K b value for aniline is less than that for methylamine.

(ii) Methylamine in water reacts with ferric chloride to give a precipitate of ferric hydroxide.

(iii) Aniline does not undergo Friedel-Crafts reaction.

Options:
A

(i), (ii), (iii)

B

(ii), (iii)

C

(i), (iii)

D

(i), (ii)

The correct answer is:

(ii), (iii)

Solution:
(i) False: In aniline, the lone pair of electrons on the N-atom is delocalized over the benzene ring. As a result, electron density on the nitrogen decreases. In contrast, in methylamine C H 3 N H 2 +I effect of methyl group (C H 3 ) increases the electron density on the Nâatom.

Therefore, aniline is a weaker base than methylamine and hence its p K b value is higher than that of methylamine.

(ii) True: Methylamine being more basic than water, accepts a proton from water liberating O H â ions.

These O H â ions combine with F e 3+ ions present in H 2 O to form brown precipitate, of hydrated ferric oxide.

FeCl 3 âF e 3+ +3ââC l â 2F e 3+ +6âO H â â 2Feâ ( OH ) 3 . ââââââââââââââââââââHydratedâferricâoxide âââââââââââââââââââââââââ(Brownâppt.)

(iii) True: Aniline being a Lewis base reacts with Lewis acid AlC l 3 to form a salt

C 6 H 5 N H 2 +AlC l 3 â C 6 H 5 N + H 2 AlC l 3 â LewisâbaseâLewisâacid

As a result, N of aniline acquires positive charge and hence it acts as a strong deactivating group for electrophilic substitution reaction. Consequently, aniline does not undergo Friedel-Crafts reaction.

Topic: Chemistry, Amines, NEET
State which of these statements about blood groups (ABO system and Rh system taken together) is correct.

Options:
A The blood group having all the possible antigens present in these two systems is the universal recipient
B The blood group considered as the universal donor is also the commonest blood group in humans
C The blood group considered as the universal recipient is also the rarest blood group in humans
D The blood group having no antibodies against any of the antigens in these two systems is the universal donor

The correct answer is:
The blood group having all the possible antigens present in these two systems is the universal recipient

Solution:
Universal donor: O Rh-ve, Commonest blood group in humans: O Rh+ve. Universal recipient: AB Rh+ve, Rarest blood group in humans: AB Rh-ve. The possible antigens considering ABO system and Rh system are Antigen A, Antigen B and Antigen Rh. A blood group having all the three antigens is AB Rh+ve and it is the universal recipient. A blood group having no antibodies has all the antigens and that too is AB Rh+ve.

Topic: Biology, Body Fluids and Circulation, NEET
Statement - 1: Biolistics method is used to transfer used to make transgenic plants.
Statement - 2: In biolistics method pBR322 is used.

Options:
A Both statement-1 and statement-2 is true.
B Statement-1 is false but statement-2 is true.
C Statement-1 is true but statement-2 is false.
D Both statement-1 and statement-2 is false.

The correct answer is:
Statement-1 is true but statement-2 is false.

Solution:
A gene gun or a biolistic particle delivery system, originally designed for plant transformation, is a device for injecting cells with genetic information. The payload is an elemental particle of a heavy metal coated with plasmid DNA. Millions of DNA-coated metal particles called microprojectiles are shot at target cells or tissues using a biolistic device or gene gun.

Topic: Biology, Biotechnology and Its Applications, NEET
Statement 1 - Competitive inhibitor is also called as substrate analogue.
Statement 2 - It resembles the enzyme in structure.

Options:
A Both 1 and 2 are correct
B 1 is correct and 2 is incorrect
C 1 is incorrect and 2 is correct
D Both are incorrect

The correct answer is:
1 is correct and 2 is incorrect

Solution:
In competitive inhibition, an inhibitor that resembles the normal substrate binds to the enzyme, usually at the active site, and prevents the substrate from binding. At any given moment, the enzyme may be bound to the inhibitor, the substrate, or neither, but it cannot bind to both at the same time.

Topic: Chemistry, Biomolecules, NEET
Statement 1: In plants, the tonoplast facilitates the transport of a number of ions and other materials against concentration gradients into the vacuole.
Statement 2: In amoeba, the contractile vacuole is important for osmoregulation and excretion.

Options:
A Both statements 1 and 2 are correct.
B Statement 1 is incorrect and statement 2&nbsp;is correct.
C Statement 1 is correct and statement 2 is incorrect.
D Both statements 1 and 2 are incorrect.

The correct answer is:
Both statements 1 and 2 are correct.

Solution:
In plants, the tonoplast facilitates the transport of a number of ions and other materials against concentration gradients into the vacuole; hence their concentration is significantly higher in the vacuole than in the cytoplasm. In amoeba, the contractile vacuole is important for osmoregulation and excretion. In many cells, as in protists, food vacuoles are formed by engulfing other food particles.

Topic: Biology, Cell - The Unit of Life, NEET
Statement A: Human skull possesses two occipital condyles.

Statement B: Ribs in human are bicephalic.

Read the above statements and choose the correct option.

Options:
A Only statement A is correct.
B Only Statement B is correct.
C Both statements A and B are correct.
D Both statements A and B are incorrect.

The correct answer is:
Both statements A and B are correct.

Solution:
The skull region articulates with the upper region of the vertebral column with the help of two occipital condyles (dicondylic skull). Ribs are also termed as bicephalic because it has two articulation surfaces on its dorsal end (towards vertebra).

Topic: Biology, Locomotion and Movement, NEET
Statement A: Polyblend is used for making roads.

Statement B: Sanitary landfills are provided with a good solution for the management of garbage, especially in big cities.

Choose the correct option with respect to the statements above.

Options:
A Only statement A is correct
B Only statement B is correct
C Both statements A and B are correct
D Both statements A and B are incorrect.

The correct answer is:
Only statement A is correct

Solution:
Sanitary landfills
- These were adopted as the substitute for open-burning dumps.
- In a sanitary landfill, all collected wastes are dumped in a depression (or trench) and compaction is done followed by covering with dirt every day.
- Landfills are also not really much of a solution since the amount of garbage generation especially in the metros has increased so much that these sites are getting filled too. Also, there is a danger of seepage of chemicals, etc., from these landfills polluting the underground water resources.

Topic: Biology, Environmental Issues, NEET
Statement A: The human skull is monocondylic.
Statement B: Ribs in humans are bicephalic.

Options:
A Only statement A is correct.
B Only Statement B is correct.
C Both statements A and B are correct.
D Both statements A and B are incorrect.

The correct answer is:
Only Statement B is correct.

Solution:
The skull region articulates with the upper region of the vertebral column with the help of two occipital condyles (dicondylic skull). Ribs are also termed as bicephalic because it has two articulation surfaces on its dorsal end (towards vertebra).

Topic: Biology, Locomotion and Movement, NEET
Statement A – Typhoid Mary was a health worker.
Statement B – Haemophilus influenzae doesn’t cause influenza.

Options:
A Only Statement A is correct
B Only Statement B is correct
C Both Statements A and B are correct.
D Both Statements A and B are incorrect

The correct answer is:
Only Statement B is correct

Solution:
A classic case of Typhoid Mary
Mary Mallon (nicknamed Typhoid Mary): She (cook by profession) was a typhoid carrier and she continued to spread typhoid for many years through the food she prepared.
Streptococcus pneumonia and Haemophilus influenzae cause pneumonia while Influenza is caused by Influenza Virus.

Topic: Biology, Human Health and Diseases, NEET
Statement A - Typical angiosperm embryo develops near to the micropylar end of the embryosac.

Statement B - Coleorrhiza encloses radical and the root cap.

Options:
A Only Statement A is correct.
B Only Statement B is correct.
C Both Statements A and B are correct
D Both Statements A and B are incorrect.

The correct answer is:
Both Statements A and B are correct

Solution:
Embryo develops near to the micropylar end of the embryo sac. Usually zygotes start dividing only whensome amount of endosperm is formed. This is to ensure the nutrition to the developing embryo.Although the seeds of monocots and dicots differ greatly but their early stages of embryodevelopment (embryogeny) are very similar.
Coleorrhiza: Radical and the root cap (located at the lower end of the embryonal axis) are enclosedinan undifferentiated sheath called coleorrhiza.

Topic: Biology, Sexual Reproduction in Flowering Plants, NEET
Statement I: According to the 2001 census report, the population growth rate was still around 1.7%.
Statement I: At this rate if population increases then our population could double in 33 years.

Options:
A Statement I is true and statement II is false
B Statement II is true and statement I is false
C Both the statements are true
D Both the statements are false

The correct answer is:
Both the statements are true

Solution:
According to the 2001 census report, the population growth rate was still around 1.7%, i.e., 17/1000/year, a rate at which our population could double in 33 years. Such an alarming growth rate could lead to an absolute scarcity of even the basic requirements, i.e., food, shelter and clothing, in spite of significant progress made in those areas.

Topic: Biology, Reproductive Health, NEET
Statement I: Acid strength increases in the order given as

HF<<HCl<<HBr<<HI

Statement II: As the size of the elements F, Cl, Br, I increases down the group, the bond strength of HF, HCl HBr and HI decreases and so the acid strength increases.

In the light of the above statements, choose the correct answer from the options given below.

Options:
A Both Statement I and Statement II are true.
B Both Statement I and Statement II are false.
C Statement I is correct but Statement II is false.
D Statement I is incorrect but Statement II is true.

The correct answer is:
Both Statement I and Statement II are true.

Solution:
Acidic strength of hydracids increases in order

HF≪HCl≪HBr≪HI

So, statement-I is true
The above order of acidic strength is due to decrease in bond strength. As the size of atom increases, bond length increases and bond strength decreases.
Thus, statement I and statement II are true

Topic: Chemistry, p Block Elements (Group 15, 16, 17 & 18), NEET, NEET 2021
Statement I: Amniocentesis is often misused.
Statement II: Amniocentesis is being used to determine the sex of the foetus so that female foetus may be aborted.

Options:
A Both statements I and II are correct.
B Statement I is correct but statement II is incorrect.
C Statement I is incorrect but statement II is correct.
D Both statements I and II are incorrect.

The correct answer is:
Both statements I and II are correct.

Solution:
In amniocentesis, some of the amniotic fluid of the developing foetus is taken to analyse the foetal cells and dissolved substances. This procedure is used to test for the presence of certain genetic disorders such as down syndrome, haemophilia, sickle-cell anemia, etc., to determine the survivability of the foetus. Statutory ban on amniocentesis for sex-determination is put to legally check the increasing menace of female foeticides, massive child immunisation, etc.

Topic: Biology, Reproductive Health, NEET
Statement I: Biodiversity loss is now one of the world's most pressing crisis.
Statement II: Lower diversity in a species leads to non-uniformity.

Choose the correct option from below.

Options:
A Both Statements I and II are true and Statement II is a correct explanation of Statement I.
B Both Statements I and II are true but Statement II is not a correct explanation of Statement I.
C Statement I is true but Statement II is false.
D Statement I is false but Statement II is true.

The correct answer is:
Statement I is true but Statement II is false.

Solution:
The occurrence of different kinds of organism reflects the biological diversity. The term biodiversity refers to the totality of genes, species and ecosystem of a region. The living world abounds with enormous biodiversity. Biologically-rich and unique habitat are being destroyed, fragmented, and degraded due to problems caused by increasing human population resource consumption and pollution. Biodiversity loss is now one of the world's most pressing crisis. The primary reason for the concern is the realisation that biological diversity is being lost even before its size is known. Loss of biodiversity would check the evolutionary capability of biota to cope up with environmental changes. How to check the loss of species and erosion of gene pool is one of the major challenges to science. Biodiversity includes three hierarchial levels- Genetic Diversity, Species Diversity and Community and Ecosystem Diversity.
Genetic diversity refers to the variation of genes within species. It enables a population to adapt to its environment and to respond to natural selection. If a species has more genetic diversity, it can adapt better to the changed environmental conditions. Lower diversity in a species leads to uniformity, as is the case with large monocultures of genetically similar crop plants. This has advantage when increased crop production is a consideration, but can be a problem when an insect or a fungal disease attacks the field and poses a threat to the whole crop.

Topic: Biology, Biodiversity and its Conservation, NEET
Statement I: Biolistics method of gene transfer is an example of direct gene transfer.

Statement II: In the biolistics method, PBR322 is used.

Options:
A Statement-1 is true, Statement-2 is true; Statement-2 is not the correct explanation of Statement-1.
B Statement-1 is false, Statement-2 is true.
C Statement-1 is true, Statement-2 is false.
D Statement-1 is true, Statement-2 is true; Statement-2 is the correct explanation of Statement-1.

The correct answer is:
Statement-1 is true, Statement-2 is false.

Solution:
Biolistics is a commonly used method for genetic transformation of plants and other organisms. Millions of DNA-coated metal particles are shot at target cells or tissues using a biolistic device or gene gun.

Topic: Biology, Biotechnology - Principles and Processes, NEET
Statement I: Diplo-haplontic or haplo-diplontic life cycle is characterized by the existence of a sporophyte as well as a gametophyte.
Statement II: Fungi have a haplo-diplontic life cycle.

Options:
A Both the statements are correct
B Both the statements are wrong
C Statement I is correct and statement II is wrong
D Statement II is correct and statement I is wrong

The correct answer is:
Statement I is correct and statement II is wrong

Solution:
Diplo-haplontic or Haplo diplontic: It is characterized by the existence of sporophyte as well as gametophyte. Both of them are photosynthetic and free living and two-phases the diplophase and haplophase are nearly equal. If sporophytes and gametophytes are morphologically different then the life cycle is termed as Diplo-haplontic-heteromorphic, e.g., all pteridophytes, all bryophytes some brown algae viz., Laminaria and other Kelps.

Topic: Biology, Plant Kingdom, NEET