datavorous/entrance-exam-dataset huggingface dataset:
Which of the following statements about RNA is not correct?

Options:
A It has single strand structure
B It controls the synthesis of proteins
C It does not contains any pyrimidine base
D It does not undergo replication

The correct answer is:
It does not contains any pyrimidine base

Solution:
Here statement C is incorrect as RNA contains uracil in place thymine and Uracil is a pyridimine base.

Topic: Chemistry, Biomolecules, NEET
Which of the following statements about stable substances and photon absorption and emission is true?

Options:
A Stable substances can absorb photons of larger wavelength and emit light of shorter wavelength.
B Stable substances can absorb photons of larger wavelength and emit light of longer wavelength.
C Stable substances cannot absorb photons of larger wavelength and emit light of shorter wavelength.
D Stable substances can absorb photons of any wavelength and emit light of any wavelength.

The correct answer is:
Stable substances cannot absorb photons of larger wavelength and emit light of shorter wavelength.

Solution:
Correct Option is : (C)
Stable substances cannot absorb photons of larger wavelength and emit light of shorter wavelength.

Topic: Chemistry, Dual Nature of Matter, NEET
Which of the following statement/s about test cross is/are correct?

I. Every test cross is a back cross but not every back cross is a test cross.
II. Every back cross is a test cross but not every test cross is a back cross.
III. The ratio of a test cross is always 1:1.
IV. A test cross can be considered as a type of reciprocal cross.

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

The correct answer is:
I

Solution:
A back cross is a cross between hybrid and any homozygous parent. A test cross is a cross between hybrid and homozygous recessive parent. Thus every test cross is a back cross but not every back cross is a test cross. The Monohybrid test cross-ratio is 1:1, dihybrid test cross-ratio is 1:1:1:1, trihybrid test cross-ratio is 1:1:1:1:1:1:1:1. Reciprocal crosses are a pair of crosses in which the sex of the parents are interchanged.

Topic: Biology, Principles of Inheritance and Variation, NEET
Which of the following statements about the 3p orbital is correct?

Options:
A It has 1 angular node and 1 radial nodes.
B It has 3 angular nodes and 0 radial nodes.
C It has 2 angular nodes and 1 radial node.
D It has 2 angular nodes and 2 radial nodes.

The correct answer is:
It has 1 angular node and 1 radial nodes.

Solution:
Correct Option is : (A)
It has 1 angular node and 1 radial nodes.

Topic: Chemistry, Structure of Atom, NEET
Which of the following statements about the cardiac cycle is CORRECT?

Options:
A At no time during the cardiac cycle are the mitral and aortic valves both open.
B The pressure in the left atrium exceeds that of the left ventricle throughout the ventricular ejection period.
C Most filling of the ventricle in diastole in a resting individual occurs with atrial contraction.
D The second heart sound is most closely associated with the closure of the left atrioventricular (mitral) valve.

The correct answer is:
At no time during the cardiac cycle are the mitral and aortic valves both open.

Solution:
Cardiac cycle has three stages: 1) Joint diastole: In this all the four chambers are relaxed and thus AV valves are open while semilunar are closed. 2) Atrial systole: Atria contract and AV valves are open. 3) Ventricular systole: Ventricles contract and thus semilunar valves open and AV close. Thus never both AV and semilunar are open. The pressure in left atrium exceeds that of left ventricle throughout the ventricle ejection period. First heart sound is LUB due to closure of AV valves and second heart sound is DUB due to closure of semilunar valves.

Topic: Biology, Body Fluids and Circulation, NEET
Which of the following statements about the composition of the vapour over an ideal 1 : 1 molar mixture of benzene and toluene is correct? Assume that the temperature is constant at 25oC . (Given vapour pressure data at 25oC , benzene = 12.8 kPa, toluene = 3.85 kPa)

Options:
A The vapour will contain a higher percentage of benzene.
B The vapour will contain a higher percentage of toluene.
C The vapour will contain equal amounts of benzene and toluene.
D Not enough information is given to make a prediction.

The correct answer is:
The vapour will contain a higher percentage of benzene.

Solution:
A - benzene, B - Toluene
PT=PAo XA+PBo XB
=12.8×0.5+3.85×0.5
=6.2+1.925
=8.125
Also, mole fraction of benzene in vapour form
YA=PAo XAPT=6.28.121=0.75
And mole fraction of Toluene in vapour form
YB=1-0.75=0.25

Topic: Chemistry, Solutions, NEET, NEET 2016 (Phase 1)
Which of the following statements about the conversion of phenol to benzene is true?

Options:
A The reaction is exothermic
B The reaction is a polymerization process
C The reaction requires high pressure
D The reaction is highly selective

The correct answer is:
The reaction is exothermic

Solution:
The conversion of phenol to benzene is an exothermic reaction, meaning it releases heat during the process.

Topic: Chemistry, Alcohols Phenols and Ethers, NEET
Which of the following statements about the Fabaceae family is incorrect?

Options:
A Ornamental plants such as lupin, petunia and sweet pea are included in this group
B They have diadelphous stamens and their anthers are dithecous
C Their sepals may show valvate or imbricate aestivation
D They have a monocarpellary gynoecium with a superior ovary

The correct answer is:
Ornamental plants such as lupin, petunia and sweet pea are included in this group

Solution:
Fabaceae is a family of leguminous plants which was earlier called Papilionoideae. They have diadelphous stamens and dithecous anthers, their sepals may show valvate or imbricate aestivation but their petals show vexillary aestivation. They have a monocarpellary gynoecium with a superior ovary. Petunia belongs to family Solanceae, whereas lupin and sweet pea belong to Fabaceae.

Topic: Biology, Morphology of Flowering Plants, NEET
Which of the following statements about the Five Kingdom classification system is true?

Options:
A It differentiates between heterotrophic and autotrophic groups
B It only classifies plants and animals
C It is no longer used in modern biology
D It does not differentiate between heterotrophic and autotrophic groups

The correct answer is:
It does not differentiate between heterotrophic and autotrophic groups

Solution:
The Five Kingdom classification system did not differentiate between the heterotrophic group and autotrophic group.

Topic: Biology, Biological Classification, NEET
Which of the following statements about the functioning of the kidney is CORRECT?

I. On an average, 1100-1200 ml of blood is filtered by the kidneys per minute which constitute roughly 1/5th of the blood pumped out by both the ventricles of the heart in a minute.
II. JGA is a special sensitive region formed by cellular modifications in the distal convoluted tubule and the glomerulus at the location of their contact.
III. The ascending limb of Henle's loop is impermeable to water but allows transport of electrolytes.
IV. The collecting duct allows passage of small amounts of urea into the medullary interstitium to keep up the osmolarity.

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

The correct answer is:
III and IV

Solution:
On an average, 1100-1200 ml of blood is filtered by the kidneys per minute which constitute roughly 1/5th of the blood pumped out by each ventricle of the heart in a minute. JGA is a special sensitive region formed by cellular modifications in the distal convoluted tubule and the afferent arteriole at the location of their contact. A fall in GFR can activate the JG cells to release renin which can stimulate the glomerular blood flow and thereby the GFR back to normal. The ascending limb is impermeable to water but allows transport of electrolytes actively or passively. Therefore, as the concentrated filtrate pass upward, it gets diluted due to the passage of electrolytes to the medullary fluid.

Topic: Biology, Excretory Products and their Elimination, NEET
Which of the following statements about the glomerular filtration is CORRECT?

I. The hydrostatic pressure of blood in glomerular capillaries allows filtration.

II. The diameter of the efferent arteriole is lesser than the diameter of the afferent arteriole.

III. The fluid collected in the urinary space contains all constituents of blood except RBCs.

IV. The net filtration pressure at the glomerulus is around 40 mm Hg.

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

The correct answer is:
I and II

Solution:
Glomerular filtration is the renal process in which the fluid in the blood is filtered into the Bowman's capsule across the glomerulus capillaries. This filtration occurs due to the force of the difference between hydrostatic and osmotic pressure. Afferent and efferent arterioles transport blood in and out of the glomerulus. The afferent arteriole which brings in the blood is large in diameter which helps in increased blood pressure in the glomerulus. Hence, statements I & II are correct.

Topic: Biology, Excretory Products and their Elimination, NEET
Which of the following statements about the Hell-Volhard-Zelinsky reaction is true?

Options:
A It requires a large amount of red phosphorus.
B It can be performed without a catalyst.
C It involves the α-halogenation of carboxylic acids.
D It primarily forms aldehydes.

The correct answer is:
It involves the α-halogenation of carboxylic acids.

Solution:
The Hell-Volhard-Zelinsky reaction involves the α-halogenation of carboxylic acid

Topic: Chemistry, Aldehydes, Ketones and Carboxylic Acids, NEET
Which of the following statements about the interstitial compound is incorrect?

Options:
A They are chemically reactive
B They are much harder than the pure metal
C They have higher melting points than the pure metal
D They retain metallic conductivity

The correct answer is:
They are chemically reactive

Solution:
Interstitial compounds are almost inert but hard, with higher M.P. and retain conductivity.
Hence only option A is incorrect while rest are correct.

Topic: Chemistry, d and f Block Elements, NEET
Which of the following statements about the interstitial compounds is incorrect?

Options:
A They retain metallic conductivity
B They are chemically reactive
C They are much harder than the pure metal
D They have higher melting points than the pure metal

The correct answer is:
They are chemically reactive

Solution:
Interstitial compounds are obtained when small atoms like $\mathrm{H}, \mathrm{B}, \mathrm{C}, \mathrm{N}$ etc., fit into the lattice of other elements. These retain metallic conductivity. These resemble the parent metal in chemical properties (reactivity) but differ in physical properties like hardness, melting point etc.

Topic: Chemistry, d and f Block Elements, NEET, NEET 2013 (All India)
Which of the following statements about the nitrogen cycle are false?

1. Rhizobium and Frankia cause nitrogen fixation in their independent free-living stage.
2. Azotobacter and Anabaena are anaerobic, symbiotic, free-living, nitrogen fixers.
3. Rhodospirillum is an aerobic, nitrogen-fixing microbe found in the root nodules of legumes.
4. Nitrobacter oxidizes nitrites to nitrates.

Options:
A 1 and 2
B 2 and 4
C 1 , 2 and 3
D 3 and 4

The correct answer is:
1 , 2 and 3

Solution:
Free living nitrogen fixing aerobic microbes are Azobacter and Beijerinckia while Rhodospirillum is anaerobic and free living. Cyanobacteria such as Nostoc are also free living nitrogen fixers. Rhizobium has a symbiotic relationship with roots of legumes like, pea, lentils, alfalfa etc. They produce nodules on the roots. Similar to this is Frankia which also produces nitrogen fixing nodules on the roots of non-leguminous plant Alnus. Ammonia is first oxidised to nitrite by the bacteria Nitrosomonas and/or Nitrococcus. The nitrite is further oxidised to nitrate with the help of the bacterium Nitrobacter. These steps are called nitrification.

Topic: Biology, Mineral Nutrition, NEET
Which of the following statements about the odor of alkynes is correct?

Options:
A All alkynes have a characteristic odor.
B Only ethyne has a characteristic odor.
C All alkynes are odorless.
D The odor of alkynes varies depending on their carbon chain length.

The correct answer is:
Only ethyne has a characteristic odor.

Solution:
Only ethyne (acetylene) among alkynes has a characteristic odor. Other alkynes are odorless.

Topic: Chemistry, Hydrocarbons, NEET
Which of the following statements about the plasma membrane is TRUE?

Options:
A It allows selected molecules to pass into and out of the cell.
B It is a rigid and unmoving layer of phospholipids and protein.
C It is a solid layer of protein that protects the contents of the cell.
D The plasma membrane of a bacterium has none of the same components as the plasma membrane of an animal cell.

The correct answer is:
It allows selected molecules to pass into and out of the cell.

Solution:
Plasma membrane or the cell membrane which is made up of phospholipid bilayer with embedded proteins. It is a semipermeable membrane which allows ions and selected molecules to pass in and out of the cell. In bacteria, the cell wall is attached to the plasma membrane and plays the same role as a semipermeable membrane. The plasma membrane protects the cell from the outside environment.

Topic: Biology, Cell - The Unit of Life, NEET
Which of the following statements about the process of digestion is CORRECT?

I. Carbohydrates in the chyme are hydrolyzed by pancreatic amylase into monosaccharides directly.

II. Nucleases in the intestinal juice act on nucleic acids to form nucleotides and nucleosides.

Options:
A Both I and II are correct
B Both I and II are wrong
C I is correct and II is wrong
D II is correct and I is wrong

The correct answer is:
Both I and II are wrong

Solution:
Carbohydrates in the chyme are hydrolyzed to disaccharides by the pancreatic amylase. The starch is converted into isomaltose, maltose, and dextrins. The intestinal juice converts the disaccharide to monosaccharides. The nucleic acids are broken down to form nucleotides by the nucleases present in the pancreatic juice, these nucleotides are further reduced to form nucleosides by the intestinal juice with the enzyme nucleosidases and nucleotidases.

Topic: Biology, Digestion and Absorption, NEET
Which of the following statements about water is FALSE?

Options:
A There is extensive intramolecular hydrogen bonding in the condensed phase.
B Ice formed by heavy water sinks in normal water.
C Water is oxidized to oxygen during photosynthesis
D Water can act both as an acid and as a base

The correct answer is:
There is extensive intramolecular hydrogen bonding in the condensed phase.

Solution:
(i) Ice formed by heavy water sinks in normal water due to higher density of D2O than normal water.
(ii) 6 CO 2 + 6 H 2 O → chlorophyll hv C 6 H 12 O 6 +6O 2
(iii) Water can show amphiprotic nature and hence water can act both as an acid a base.
(iv) There is extensive intermolecular hydrogen bonding in the condensed phase instead of intramolecular H - bonding.

Topic: Chemistry, s Block Elements, NEET
Which of the following statements about zeolites is not correct?

Options:
A Zeolites are open structures of silica in which trivalent aluminium is substituted by a fraction of silicon atoms
B Shape selectivity of zeolites depends upon porous structures of the catalyst
C Zeolites are synthetic microporous aluminosilicates which do not exist naturally
D Zeolites are aluminosilicates having three dimensional network

The correct answer is:
Zeolites are synthetic microporous aluminosilicates which do not exist naturally

Solution:
Zeolites are naturally occurring or synthetic microporous aluminosilicates.
Which are used to remove permanent hardness from hard water.

Topic: Chemistry, Surface Chemistry, NEET
Which of the following statements about zero order reaction is not true

Options:
A Its unit is molL −1 time −1
B The graph between log (reactant) versus rate of reaction is a straight line
C The half life for zero order reaction is independent of initial concentration.
D Rate of reaction is independent of concentration of reactants

The correct answer is:
The half life for zero order reaction is independent of initial concentration.

Solution:
The unit for zero order reaction is molL −1 time −1 and the half life of zero order reaction is given by t1/2=[A]â/2k , where [A]â is initial concentration of reactant.

Topic: Chemistry, Chemical Kinetics, NEET
Which of the following statements above about ozone are not true?
a) Ozone is formed in the stratosphere.
b) Ozone is good in the troposphere and bad in the stratosphere.
c) Ozone depletion is maximum near poles.>

Options:
A

Only (c)

B

Only (a)

C

Only (b)

D

All of these

The correct answer is:

Only (b)

Solution:
Ozone or trioxygen, is a triatomic molecule, consisting of three oxygen atoms. Ozone is formed from dioxygen by the action of ultraviolet light and also atmospheric electrical discharges, and is present in low concentrations throughout the Earth's atmosphere.
Ozone occurs in two layers of the atmosphere.
a) The ozone that is commonly associated with ozone depletion and the ozone âholeâ is in the stratosphere, a layer that extends upward from about 10 to 30 miles (15 to 50 kilometers) above the earth. This âgoodâ ozone shields life on earth from the sun's harmful ultraviolet rays (UV-b).
b)The layer surrounding the earth's surface is the troposphere. Here, ground-level or "bad" ozone is an air pollutant that damages human health, vegetation, and many common materials. A number of gaseous pollutants like CH4, CFCâ²s,ââN2O cause depletion of the ozone layer and create ozone holes. The depletion of the Ozone layer allows more UV radiation to reach the earth's surface. UV rays inhibit photosynthesis in plants, causes, Skin cancer. It damages nucleic acids in living organisms.

Topic: Biology, Environmental Issues, NEET
Which of the following statements accurately demonstrates that the coefficient of area expansion, (∆A/A)/∆T, of a rectangular sheet of the solid is twice its linear expansivity, αl?

Options:
A [∆A/A]/∆T = 2αl
B [∆A/A]/∆T = αl/2
C [∆A/A]/∆T = 3αl
D [∆A/A]/∆T = αl/3

The correct answer is:
[∆A/A]/∆T = 2αl

Solution:
Correct Option is : (A)
[∆A/A]/∆T = 2αl

Topic: Chemistry, Thermal Properties of Matter, NEET
Which of the following statements accurately describes the charge density of the smaller sphere in comparison to the larger one when considering two conducting spheres with radii R1 and R2 (where R1 > R2) that are at the same potential?

Options:
A The charge density of the smaller sphere is more than that of the larger one.
B The charge density of the smaller sphere is equal to that of the larger one.
C The charge density of the smaller sphere is less than that of the larger one.
D The charge density of the smaller sphere cannot be determined from the given information.

The correct answer is:
The charge density of the smaller sphere is less than that of the larger one.

Solution:
Correct Option is : (C)
The charge density of the smaller sphere is less than that of the larger one.

Topic: Chemistry, Capacitance, NEET
Which of the following statements accurately describes the comparison of the work done when a test charge (q) moves in the electric field of a point charge (Q) along two different closed paths, as described in Figure 2.6?

Options:
A The work done is the same in both cases because the paths have the same area.
B The work done is different in both cases because the paths have different areas.
C The work done is zero in both cases as the electric field is conservative.
D The work done is dependent on the magnitude of the charges and not the paths.

The correct answer is:
The work done is zero in both cases as the electric field is conservative.

Solution:
Correct Option is : (C)
The work done is zero in both cases as the electric field is conservative.

Topic: Chemistry, Capacitance, NEET
Which of the following statements accurately describes the conservation of momentum during the collision of a molecule in a gas container with a horizontal wall under the given conditions?

Options:
A Momentum is conserved.
B Momentum is not conserved.
C Momentum conservation depends on the angle of incidence.
D Momentum conservation depends on the mass of the molecule.

The correct answer is:
Momentum is conserved.

Solution:
Correct Option is : (A)
Momentum is conserved.

Topic: Chemistry, Work Power Energy, NEET
Which of the following statements accurately describes the formation of oxosalts by alkali and alkaline earth metals with respect to the given characteristics?

Options:
A Alkali metals form oxosalts, while alkaline earth metals do not.
B Both alkali and alkaline earth metals form oxosalts.
C Alkaline earth metals form oxosalts, while alkali metals do not.
D Neither alkali nor alkaline earth metals form oxosalts.

The correct answer is:
Both alkali and alkaline earth metals form oxosalts.

Solution:
Correct Option is : (B)
Both alkali and alkaline earth metals form oxosalts.

Topic: Chemistry, s Block Elements, NEET
Which of the following statements accurately describes the hybridization and bond lengths in the case of PCl5and SF6?

Options:
A Both PCl5and SF6have the same hybridization, and in both molecules, axial bonds are longer than equatorial bonds.
B PCl5and SF6have different hybridizations, and in PCl5, axial bonds are longer than equatorial bonds, whereas in SF6, axial bonds and equatorial bonds have the same length.
C PCl5and SF6have the same hybridization, and in both molecules, axial bonds and equatorial bonds have the same length.
D PCl5and SF6have different hybridizations, and in both molecules, axial bonds and equatorial bonds have the same length.

The correct answer is:
PCl5and SF6have different hybridizations, and in PCl5, axial bonds are longer than equatorial bonds, whereas in SF6, axial bonds and equatorial bonds have the same length.

Solution:
Correct Option is : (B)
PCl5and SF6have different hybridizations, and in PCl5, axial bonds are longer than equatorial bonds, whereas in SF6, axial bonds and equatorial bonds have the same length.

Topic: Chemistry, Chemical Bonding and Molecular Structure, NEET
Which of the following statements accurately describes the molecular geometry of PCl5and IF5?

Options:
A PCl5is trigonal bipyramidal, while IF5is square pyramidal.
B PCl5is square pyramidal, while IF5is trigonal bipyramidal.
C Both PCl5and IF5are trigonal bipyramidal.
D Both PCl5and IF5are square pyramidal.

The correct answer is:
PCl5is trigonal bipyramidal, while IF5is square pyramidal.

Solution:
Correct Option is : (A)
PCl5is trigonal bipyramidal, while IF5is square pyramidal.

Topic: Chemistry, Chemical Bonding and Molecular Structure, NEET
Which of the following statements accurately describes the solubility of carbonates and sulfates of alkali and alkaline earth metals?

Options:
A The solubility of carbonates and sulfates increases down the group for both alkali and alkaline earth metals.
B The solubility of carbonates and sulfates decreases down the group for both alkali and alkaline earth metals.
C The solubility of carbonates and sulfates increases down the group for alkali metals but decreases down the group for alkaline earth metals.
D The solubility of carbonates and sulfates decreases down the group for alkali metals but increases down the group for alkaline earth metals.

The correct answer is:
The solubility of carbonates and sulfates decreases down the group for both alkali and alkaline earth metals.

Solution:
Correct Option is : (B)
The solubility of carbonates and sulfates decreases down the group for both alkali and alkaline earth metals.

Topic: Chemistry, s Block Elements, NEET