datavorous/entrance-exam-dataset huggingface dataset:
Kohlrausch's law states that at

Options:
A finite dilution, each ion makes definite contribution to equivalent conductance of an electrolyte, whatever be the nature of the other ion of the electrolyte.
B infinite dilution, each ion makes definite contribution to equivalent conductance of an electrolyte depending on the nature of the other ion of the electrolyte.
C infinite dilution, each ion makes definite contribution to conductance of an electrolyte whatever be the nature of the other ion of the electrolyte.
D infinite dilution, each ion makes definite contribution to equivalent conductance of an electrolyte, whatever be the nature of the other ion of the electrolyte.

The correct answer is:
infinite dilution, each ion makes definite contribution to equivalent conductance of an electrolyte, whatever be the nature of the other ion of the electrolyte.

Solution:
According to Kohlrausch's law "at infinite dilution when the dissociation is complete, each ion makes a definite contribution towards equivalent conductivity of the electrolyte irrespective of the nature of the other ion with which it is associated.
Or
Equivalent conductivity of an electrolyte at infinite dilution is the sum of the equivalent conductivities of the cations and anion.

Topic: Chemistry, Electrochemistry, NEET, NEET 2008 (Screening)
Kp = 0.04 atm at 899 K for the equilibrium shown below. What is the equilibrium concentration of C2H6when it is placed in a flask at 4.0 atm pressure and allowed to come to equilibrium? C2H6(g) ⇌ C2H4(g) + H2(g)

Options:
A 0.008 atm
B 3.62 atm
C 0.04 atm
D 0.06 atm

The correct answer is:
3.62 atm

Solution:
Correct Option is : (B)
3.62 atm

Topic: Chemistry, Ionic Equilibrium, NEET
Kranz anatomy is one of the characteristics of the leaves of

Options:
A potato.
B wheat.
C sugarcane.
D mustard.

The correct answer is:
sugarcane.

Solution:
This type of anatomy is found in the chloroplast of C4 plants (sorghum, maize, etc) in which mesophyll cells are clustered around a bundle sheath cell in ring form. RuBisCO is present in the bundle sheath cell that helps in the fixation of carbon dioxide. The leaves of sugarcane possess Kranz anatomy.

Topic: Biology, Photosynthesis in Higher Plants, NEET
Krebs cycle starts with the formation of a six-carbon compound by a reaction between

Options:
A Succinic acid and Fumaric acid
B Fumaric acid and Pyruvic acid
C Oxaloacetic acid and Acetyl CoA
D Malic acid and Acetyl CoA

The correct answer is:
Oxaloacetic acid and Acetyl CoA

Solution:
Krebs cycle starts with the condensation of acetyl group from acetyl co-A with oxaloacetic acid (OAA) and water to yield citric acid. It has three carboxylic acid groups. Hence it is also called Tri Carboxylic Acid Cycle (TCA cycle). This reaction is catalysed by the enzyme citrate synthase and a molecule of CoA is released.

Topic: Biology, Respiration in Plants, NEET
Kwashiorkor disease is due to

Options:
A simultaneous deficiency of proteins and fats
B simultaneous deficiency of protein and calories
C deficiency of carbohydrates
D protein deficiency not accompanied by calorie deficiency

The correct answer is:
protein deficiency not accompanied by calorie deficiency

Solution:
Kwashiorkor disease is due to protein deficiency not accompanied by calorie deficiency in the children of age 1-5 years. It's symptoms are weak muscle, thin limbs, retarded growth of the body and brain, swelling of legs due to retention of water (oedema), reddish hair, pot belly, etc.

Topic: Biology, Digestion and Absorption, NEET, NEET 2019 (Odisha)
Kyoto Protocol was endorsed at

Options:
A $\mathrm{CoP}-3$
B CoP-5
C $\mathrm{CoP}-6$
D CoP-4

The correct answer is:
$\mathrm{CoP}-3$

Solution:
Kyoto protocol climate change conference (CoP-3) held at Kyoto, Japan in 1997. The developed countries agreed to specific targets for cutting their emissions of green house gases. A general framework was defined for this, with specifics to be detailed over the next few year's. This became known as the Kyoto Protacol.

Topic: Biology, Environmental Issues, NEET, NEET 2013 (All India)
La normally exists as which of the following crystal structures?

Options:
A Ccp
B Hcp
C Bcc
D All of the above

The correct answer is:
All of the above

Solution:
Correct Option is : 4
All of the above

Topic: Chemistry, d and f Block Elements, NEET
LAB are

Options:
A Healthy microbiota
B Inhibit food spoilage
C Enhances food spoilage
D Both a and b

The correct answer is:
Both a and b

Solution:
Lactic acid bacteria produce lactic acid which causes curdling of milk. It includes healthy gut microbes like Lactobacillus and Streptococcus lactis. These are the Gram-positive fermentative bacteria that contribute to the taste and texture of fermented products. These bacteria inhibit the food spoiling bacteria by producing growth-inhibiting substances with large amounts of lactic acid.

Topic: Biology, Microbes in Human Welfare, NEET
Label the diagram as A and B respectively.

Options:
A Xylem and Phloem
B Phloem and Xylem
C Xylem and Cambium
D Cambium and Phloem

The correct answer is:
Phloem and Xylem

Solution:
A and B are Phloem and Xylem

Topic: Biology, Anatomy of Flowering Plants, NEET
Label the diagram as A and B respectively.

Options:
A Xylem and Phloem
B Phloem and Xylem
C Xylem and Cambium
D Cambium and Phloem

The correct answer is:
Xylem and Phloem

Solution:
A and B are Xylem and Phloem.

Topic: Biology, Anatomy of Flowering Plants, NEET
Label the diagram as A, B, C, D, E respectively.

Options:
A Trichome, Epidermis, Hypodermis, Parenchyma, Pericycle
B Trichome, Epidermis, Hypodermis, Parenchyma, Endodermis
C Epidermal hair, Epidermis, Hypodermis, Parenchyma, Endodermis
D None of the above

The correct answer is:
Epidermal hair, Epidermis, Hypodermis, Parenchyma, Endodermis

Solution:
A, B, C, D, E respectively are Epidermal hair, Epidermis, Hypodermis, Parenchyma, Endodermis.

Topic: Biology, Anatomy of Flowering Plants, NEET
Label the diagram as A, B, C, D, E respectively.

Options:
A Subsidiary Cells, Epidermal Cells, Chloroplast, Guard Cells, Stomatal Pore
B Epidermal Cells, Subsidiary Cells, Chloroplast, Guard Cells, Stomatal Pore
C Subsidiary Cells, Epidermal Cells, Chloroplast, Stomatal Pore, Guard Cells
D Epidermal Cells, Subsidiary Cells, Guard Cells, Chloroplast, Stomata

The correct answer is:
Epidermal Cells, Subsidiary Cells, Chloroplast, Guard Cells, Stomatal Pore

Solution:
A, B, C, D, E respectively are Epidermal Cells, Subsidiary Cells, Chloroplast, Guard Cells, Stomatal Pore.

Topic: Biology, Anatomy of Flowering Plants, NEET
Label the diagram as A, B, C, D, E respectively.

Options:
A Trichomes, Epidermis, Cortex, Endodermis, Pericycle
B Trichomes, Hypodermis, Cortex, Endodermis, Pericycle
C Root hair, Epidermis, Cortex, Endodermis, Pericycle
D Root hair, Hypodermis, Cortex, Endodermis, Pericycle

The correct answer is:
Root hair, Epidermis, Cortex, Endodermis, Pericycle

Solution:
A, B, C, D, E respectively are Root hair, Epidermis, Cortex, Endodermis, Pericycle.

Topic: Biology, Anatomy of Flowering Plants, NEET
Label the diagram as A, B, C, D respectively.

Options:
A Vascular Bundle, Pith, Pericycle, Medullary rays
B Pith, Pericycle, Medullary rays, Vascular Bundle
C Pericycle, Vascular bundle, Medullary rays, Pith
D Pericycle, Vascular bundle, Medullary rays, Phloem

The correct answer is:
Pericycle, Vascular bundle, Medullary rays, Pith

Solution:
A, B, C, D respectively are Pericycle, Vascular bundle, Medullary rays, Pith.

Topic: Biology, Anatomy of Flowering Plants, NEET
Label the diagram as A, B, C, D respectively.

Options:
A Protoxylem, Metaxylem, Pith, Xylem
B Protoxylem, Metaxylem, Pith, Phloem
C Metaxylem, Protoxylem, Pith, Phloem
D Phloem, Protoxylem, Pith, Metaxylem

The correct answer is:
Phloem, Protoxylem, Pith, Metaxylem

Solution:
A, B, C, D respectively are Phloem, Protoxylem, Pith, Metaxylem.

Topic: Biology, Anatomy of Flowering Plants, NEET
Label the diagram as A, B, C, D respectively.

Options:
A Protoxylem, Metaxylem, Pith, Xylem
B Protoxylem, Metaxylem, Pith, Phloem
C Metaxylem, Protoxylem, Pith, Phloem
D None of the above

The correct answer is:
Protoxylem, Metaxylem, Pith, Phloem

Solution:
A, B, C, D respectively are Protoxylem, Metaxylem, Pith, Phloem.

Topic: Biology, Anatomy of Flowering Plants, NEET
Label the diagram as A, B, C, respectively.

Options:
A Phloem, Cambium, Xylem
B Xylem, Cambium, Phloem
C Cambium, Phloem, Xylem
D Cambium, Xylem, Phloem

The correct answer is:
Phloem, Cambium, Xylem

Solution:
A, B, C, respectively are Phloem, Cambium, Xylem.

Topic: Biology, Anatomy of Flowering Plants, NEET
Lac operon consists of

Options:
A One inhibitor, one operator, 2 structural gene
B One inhibitor, one operator, 5 structural gene
C One inhibitor, one operator, 3 structural gene
D One inhibitor, one operator, 1 structural gene

The correct answer is:
One inhibitor, one operator, 3 structural gene

Solution:
Lac operon consists of one inhibitor or regulator which produces the repressor protein to control operator, one operator, and three polycistronic structural genes.

Topic: Biology, Molecular Basis of Inheritance, NEET
Lac-operon

Options:
A is an inducible operon
B is a repressible operon
C Active in presence of glucose
D All of these

The correct answer is:
is an inducible operon

Solution:
A gene system, often encoding a coordinated group of enzymes involved in a catabolic pathway, is inducible if an early metabolite in the pathway causes activation (usually by interaction with and inactivation of a repressor) of transcription of the genes encoding the enzymes.

Topic: Biology, Molecular Basis of Inheritance, NEET
Lactic acid and glycolic acid are the monomers used for preparation of polymer

Options:
A nylon-2-nylon-6
B dextron
C PHBV
D buna-N

The correct answer is:
dextron

Solution:
Lactic acid and glycolic acid are the monomers used for preparation of Dextron. Dextron is copolymer having ester linkage.

Topic: Chemistry, Polymers, NEET
Lactose is made of

Options:
A α -D-galactose and β -D-glucose
B α -D-glucose and β -D-glucose
C β -D-galactose and β -D-glucose
D β -D-galactose and α -D-glucose

The correct answer is:
β -D-galactose and β -D-glucose

Solution:
Lactose (milk sugar) is a disaccharide, which is obtained by the condensation of one molecule of β -D-galactopyranose and one molecule of β -D-glucopyranose.

Topic: Chemistry, Biomolecules, NEET
Lactose is the substrate for the enzyme beta galactosidase and it regulates switching on and off of the operon. Hence it is termed as

Options:
A Inducer
B Repressor
C Aporepressor
D Co-repressor

The correct answer is:
Inducer

Solution:
In lac operon, the regulator gene produces active repressor protein which binds to the operator switching it off. When bacteria are grown in a medium having lactose, it functions as an inducer and binds repressor making it inactive and switching on the system.

Topic: Biology, Molecular Basis of Inheritance, NEET
Lactose is the substrate for the enzyme ß-galactosidase and it regulates switching on and off of the operon. Hence it is termed as

Options:
A inducer.
B repressor.
C aporepressor.
D co-repressor.

The correct answer is:
inducer.

Solution:
In the lac operon, the regulator gene produces active repressor protein which binds to operator switching it off. When bacteria are grown in a medium having lactose, it functions as an inducer and binds repressor making it inactive and switching on the system.

Topic: Biology, Molecular Basis of Inheritance, NEET
Lactose on hydrolysis with dil. HCl gives

Options:
A Glucose and fructose
B Glucose and mannose
C Fructose and mannose
D Glucose and galactose

The correct answer is:
Glucose and galactose

Solution:
Lactose on hydrolysis with dil. HCl gives Glucose and galactose.

Topic: Chemistry, Biomolecules, NEET
Lacunae are connected with each other by

Options:
A Canaliculi
B Sublacunae
C Both canaliculae and sublacunae
D None of the above

The correct answer is:
Canaliculi

Solution:
Lacunae are connected to one another by small canals called canaliculi.

Topic: Biology, Structural Organisation in Animals, NEET
Lacunae are present in

Options:
A certain types of epithelium
B all connective tissues
C all connective tissues with solid matrix
D bone only

The correct answer is:
all connective tissues with solid matrix

Solution:
Lacunae are spaces in which cells are present in connective tissues which have solid matrix. Cartilage and bone are connective tissues having solid matrix. Cartilage has a solid but pliable matrix. Lacunae in cartilage contain cells called chondrocytes. Bone has a solid but non-pliable matrix. Lacunae in bone contain cells called chondrocytes.

Topic: Biology, Structural Organisation in Animals, NEET
Lambda bacteriophage has ________ base pairs in genetic material.

Options:
A 48205
B 5386
C 48502
D 45802

The correct answer is:
48502

Solution:
The length of DNA is usually defined as number of nucleotides or number of base pairs present in it. This is also characteristics of an organis. Bacteriophage lambda has 48502 base pairs.

Topic: Biology, Molecular Basis of Inheritance, NEET
Land reptiles that went back into water evolve into fish-like reptiles probably 200 mya. Example of such reptile is:

Options:
A Tyrannosaurus rex
B Ichthyosaurs
C Archaeopteryx
D Stegosaurus

The correct answer is:
Ichthyosaurs

Solution:
The example of land reptile which went back to water to evolve into fish like reptiles, around 200 million years ago is Ichthyosaurus. Many fossils are found, which act as evidence for this evolution. They help us to understand the geological time scale, during which the particular extinct organism existed.

Topic: Biology, Evolution, NEET
Lanthanide contraction is caused due to

Options:
A The imperfect shielding on outer electrons by 4 f -electrons from the nuclear charge
B The appreciable shielding on outer electrons by 4 f -electrons from the nuclear charge
C The appreciable shielding on outer electrons by 5d-electrons from nuclear charge
D The same effective nuclear charge from Ce to Lu

The correct answer is:
The imperfect shielding on outer electrons by 4 f -electrons from the nuclear charge

Solution:
Lanthanide contraction is caused due to poor screening effect of 4f orbitals

Topic: Chemistry, d and f Block Elements, NEET
Lanthanoid contraction is due to:

Options:
A Negligible screening effect of 4f orbitals.
B Negligible screening effect of 5f orbital.
C Decreasing nuclear charge.
D Increasing screening effect.

The correct answer is:
Negligible screening effect of 4f orbitals.

Solution:
Lanthanide contraction :

There is a decrement in the size of the atoms and ions of the f- block elements with increasing atomic number from La having atomic number 57 through Lu having atomic number 71. Weak screening effect of the 4f- electrons called Lanthanide contraction

Topic: Chemistry, d and f Block Elements, NEET
Lanthanoids are:

Options:
A 14 elements in the sixth period (atomic no. 90 to 103) that filling of $4 f$ sublevel
B 14 element in the seventh period (atomic number $=90$ to 103 ) that are filling $5 f$ sublevel
C 14 element in the sixth period (atomic number $=58$ to 71 ) that are filling the $4 f$ sublevel
D 14 elements in the seventh period (atomic number $=50$ to 71 ) that are filling $4 f$ sublevel

The correct answer is:
14 element in the sixth period (atomic number $=58$ to 71 ) that are filling the $4 f$ sublevel

Solution:
The elements in which the additional electrons enters $(n-2) f$ orbitals are called inner transition elements. $4 f$-block elements are also called lanthanides or rare earths so lanthanides are 14 elements in the sixth period (atomic no. $=58$ to 71 ) that are filling $4 f$-sublevel.
Related Theory
Lanthanoid contraction effect results from poor shielding of nuclear charge (nuclear attractive force on electrons) by 4 felectrons so effective nuclear charge increases; the $6 s$ electrons are drawn towards the nucleus, thus resulting in a smaller atomic radius.

Topic: Chemistry, d and f Block Elements, NEET, NEET 2004
Large, colourful, fragrant flowers with nectar are seen in:

Options:
A wind pollinated plants
B insect pollinated plants
C bird pollinated plants
D bat pollinated plants

The correct answer is:
insect pollinated plants

Solution:
Insect-pollinated flowers are the flowers that are pollinated by Insects. This happens typically when insects move from plant to plant searching for food. Insect-pollinated flowers are often sweetly scented. They are large and have brightly coloured petals. They usually contain nectar- to attract insects. They have pollen grains that are often sticky and spiky so that they can stick to the legs and body of insects.

Topic: Biology, Sexual Reproduction in Flowering Plants, NEET, NEET 2023 (All India)
Large, empty colourless cells of the adaxial epidermis along the veins of grass leaves are:

Options:
A Lenticels
B Guard cells
C Bundle sheath cells
D Bulliform cells

The correct answer is:
Bulliform cells

Solution:
In monocots like grass, the upper epidermis or adaxial surface has a motor or bulliform cells. These cells are large, empty colourless cells and are present along the veins. These cells by osmotic changes help in the rolling and unrolling of leaf lamina, which regulates the rate of transpiration.

Topic: Biology, Anatomy of Flowering Plants, NEET, NEET 2020 (Phase 2)
Large woody vines are more commonly found in

Options:
A mangroves
B tropical rainforests
C alpine forests
D temperate forests

The correct answer is:
tropical rainforests

Solution:
Large woody vines are more commonly found in tropical rain forests. Lianas is example of woody vines largely present in tropical rain forests. These are the climbing vines having young twigs and smaller branches. Apart from, Lianas, epiphytes are also found in these areas.

Topic: Biology, Organisms and Populations, NEET, NEET 2011 (Screening)
Laser light has the following property

Options:
A Laser light always lies in the X-ray region
B Laser light does not have directionality property
C Laser light is white light
D Laser light is highly coherent

The correct answer is:
Laser light is highly coherent

Solution:
Laser is a process by which we get a light beam which is coherent, highly monochromatic and almost perfectly parallel. A beam of laser can go to the Moon and return to the Earth without much loss of intensity.

Topic: Physics, Ray Optics, NEET
Lassigne's test is used in qualitative analysis to detect

Options:
A Nitrogen
B Sulphur
C Chlorine
D All of these

The correct answer is:
All of these

Solution:
Nitrogen, sulphur and halogens are tested in an organic compound by Lassaigne's test.
The organic compound is fused with sodium metal as to convert these elements into ionisable inorganic substances,
Na+C+N⟶NaCN
2Na+S⟶Na2S
2Na+X2⟶2NaX
The cyanide, sulphide or halide ions can be confirmed in aqueous solution by usual test.

Topic: Chemistry, General Organic Chemistry, NEET
Late blight of potato is caused by

Options:
A Albugo candida
B Phytophthora infestans
C Alternaria solani
D Ustilago tritici

The correct answer is:
Phytophthora infestans

Solution:
Late blight of potatoes, the disease that is caused by an oomycete Phytophthora infestans. This fungus is responsible for the Irish potato famine in the mid-nineteenth century. The fungi destroy the leaves, stems, fruits and tubers of potato.

Topic: Biology, Biological Classification, NEET
Late blight of potato is caused by:

Options:
A Phytophthora infestans
B Xanthomonas oryzae
C Puccinia graminis
D TMV

The correct answer is:
Phytophthora infestans

Solution:
Late blight of potato is caused by Phytophthora infestans, it is a Phycomycetes fungus. This disease is also the cause of Ireland's famine.

Topic: Biology, Biological Classification, NEET
Late blight of potato is caused by

Options:
A Bacteria
B Fungi
C Virus
D Viroids

The correct answer is:
Fungi

Solution:
Late blight of potato is a seed born disease which is caused by Phytophthora infestans. The disease is characterized by brownish to blackish dead areas on the tip and margin of the leaflet leading to the blighting of the whole leaf. So the tuber formation is reduced.

Topic: Biology, Strategies for Enhancement in Food Production, NEET
Lateral branches with short internodes giving rise to roots below and leaves above at nodes are observed in:

Options:
A Pea, Citrus
B Mustard, Salvia
C Chrysanthemum, Banana
D Eichhornia, Pistia

The correct answer is:
Eichhornia, Pistia

Solution:
Branch of stem growing laterally with short internodes and giving rise to leafy rosettes above and the tuft of roots below at the nodes are called offset and are seen in aquatic plants like Eichhornia and Pistia.

Topic: Biology, Morphology of Flowering Plants, NEET
Lateral roots in higher plants arise from

Options:
A

Endodermis

B

Epidermis

C

Cortex

D

Pericycle

The correct answer is:

Pericycle

Solution:
The lateral roots arise from the cells of pericycle and hence, the root branches are said to be endogenous in origin (arising from a layer inner to endodermis). The lateral roots help in absorption of water and mineral salts from the soil. The meristematic cells of the lateral root push through the endodermis and cortex and then pierce through the epidermis to come out to form the lateral root.

Topic: Biology, Morphology of Flowering Plants, NEET
Law of segregation can be associated with

Options:
A Anaphase
B Anaphase I
C Anaphase II
D All of these

The correct answer is:
Anaphase I

Solution:
Law of segregation, law of purity of gametes or law of splitting of hybrids states that the characters never blend in heterozygous condition. A recessive character that was not expressed in heterozygous condition may be expressed again when it becomes homozygous. Hence, the characters segregate during the formation of gametes. The separation of homologous chromosomes takes place during Anaphase I.

Topic: Biology, Principles of Inheritance and Variation, NEET
Leaching of Ag2S is carried out by heating it with dilute solution of

Options:
A NaCN only
B HCl
C NaOH
D NaCN in presence of O2

The correct answer is:
NaCN in presence of O2

Solution:
Leaching of Ag2S is carried out by heating it with dilute solution of NaCN in presence of O2 .
Ag2S+4NaCN→Air2Na[AgCN2]+Na2S
2Na[AgCN2]+Zndust→Na2[ZnCN4]+2Ag↓

Topic: Chemistry, General Principles and Processes of Isolation of Metals, NEET
Lead concentration in blood is considered alarming if it is:

Options:
A $20 \mu \mathrm{g} / 100 \mathrm{ml}$
B $30 \mu \mathrm{g} / 100 \mathrm{ml}$
C $4-6 \mu \mathrm{g} / 100 \mathrm{ml}$
D $10-\mu \mathrm{g} / 100 \mathrm{ml}$.

The correct answer is:
$30 \mu \mathrm{g} / 100 \mathrm{ml}$

Solution:
Lead is the major heavy metal pollutant released by the vehicular exhausts. It persists in the air and precipitates with the rains. In reaches the human body when consumed through water or inhaled as suspended particle. At the concentration of \(30 \mu \mathrm{g} / 100 \mathrm{ml}\) in blood, it is considered poisoning as it can cause aplastic anaemia, tumour and cancer.
Hence, the correct answer is '\(30 \mu \mathrm{g} / 100 \mathrm{ml}\)'.

Topic: Biology, Body Fluids and Circulation, NEET, NEET 2004
Lead is not affected by dil. HCl in cold, because

Options:
A Pb is less electronegative than H
B PbO film is formed which resists chemical attack by acid
C A protective coating of PbCl2 is formed on Pb surface
D PbO2 of film is always present on Pb surface, which resists chemical attack

The correct answer is:
A protective coating of PbCl2 is formed on Pb surface

Solution:
Lead is not effected by dil. HCl in cold as protective coating of PbCl2 is formed on Pb surface.

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