datavorous/entrance-exam-dataset huggingface dataset:
Which among the following is a false statement?

Options:
A SO3 is obtained by the catalytic oxidation of SO2
B SO3 has trigonal planar geometry is gaseous state
C SO3 in gaseous state has all S-O bonds equivalent
D SO3 gas shows more solubility in water than in H2SO4

The correct answer is:
SO3 gas shows more solubility in water than in H2SO4

Solution:
Here statement in option D is wrong as SO 3 (g)forms dense mist of H2SO4 droplets. It shows more solubility in H2SO4 by forming oleum or pyrosulphuric acid.
SO3(g)+H2SO4(aq)→H2S2O7(aq)
A. SO2(g)+12O2(g)→V2O6SO3(g)
B. Since there are three electron pairs (all bond-pairs), the orientation of three electron pairs will be trigonal planar in accordance with VSEPR theory.
C. SO3 is a hybrid of three canonical forms

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

Options:
A SiO2 has a structure similar to that of CO2
B Natural Si exists only in the combined state
C Si can be prepared by reducing SiO2 with Mg
D Si does not exist in graphite-like structure, but exists only in diamond like structure

The correct answer is:
SiO2 has a structure similar to that of CO2

Solution:
SiO2 has three-dimensional network of Si-O bonds; whilst carbon dioxide consists of discrete CO2 molecules . SiO2 is solid, whereas CO2 is a gas.
B. Because of its great affinity for oxygen, Si always occurs as the oxide, silica (SiO2) or in the form of silicates, which are the compounds of SiO2 with other metal oxides.
C. SiO2+2Mg→Si+2MgO
D. the reluctance of silicon to form pπ-pπ bonds to itself is clearly shown by the fact that silicon does not exists in graphite-like structure, but only in diamond like structure.

Topic: Chemistry, p Block Elements (Group 13 & 14), NEET
Which among the following is a pair of high yielding crop varieties resistant to water stress developed in India?

Options:
A Maize and Sugarcane
B Jowar and Maize
C Bajra and Gram
D Jowar and Wheat

The correct answer is:
Jowar and Maize

Solution:
Millets are crops of arid and semi-arid regions, it includes maize, jowar and bajra. Hybrid breeding has led to the development of several high yielding varieties of these crops which are resistant to water stress.

Topic: Biology, Strategies for Enhancement in Food Production, NEET
Which among the following is a paramagnetic complex?
(At. no. $\mathrm{Mo}=42, \mathrm{Pt}=78, \mathrm{Co}=27$ )

Options:
A $\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_6\right]^{3+}$
B $\left[\mathrm{Pt}(e n) \mathrm{Cl}_2\right]$
C $\left[\mathrm{CoBr}_4\right]^{2-}$
D $\mathrm{Mo}(\mathrm{CO})_6$

The correct answer is:
$\left[\mathrm{CoBr}_4\right]^{2-}$

Solution:
$\left[\mathrm{CoBr}_4\right]^{2-}$ is a paramagnetic complex due to the following reasons:
$\rightarrow \mathrm{Br}$ is a weak field ligand
$\rightarrow$ All tetrahedral complexes are high spin
$\rightarrow$ The low spin arrangement has 5 unpaired $\mathrm{e}^{-}$in $d$-orbitals

Topic: Chemistry, Coordination Compounds, NEET, NEET 2013 (Karnataka)
Which among the following is a peptide linkage?

Options:
A
B
C
D

The correct answer is:

Solution:
Amino acids are joined by an amide linkage, called peptide bond.

Topic: Chemistry, Biomolecules, NEET
Which among the following is a thermoplastic polymer ?

Options:
A Bakelite
B Polythene
C Urea-formaldehyde resin
D Melamine polymer

The correct answer is:
Polythene

Solution:
Thermoplastic polymer - Those plastics which can be remoulded again and again.
Thermosetting plastics - Those plastics which becomes hard on cooling and permanently sets into a solid.
(1) Bakelite - Thermosetting plastic polymer (A phenol - formaldehyde resin)
(2) Polythene - Thermoplastic polymer.
(3) Urea - formaldehyde resin - A thermosetting plastic polymer.
(4) Melamine polymer - Thermosetting plastic polymer.

Topic: Chemistry, Polymers, NEET, NEET 2022 (Phase 2)
Which among the following is a tribasic acid?

Options:
A Oxalic acid
B Tartaric acid
C Lactic acid
D Citric acid

The correct answer is:
Citric acid

Solution:
citric acid consist three carboxylic group.

Topic: Chemistry, Carboxylic Acid Derivatives, NEET
Which among the following is classified as a condensation polymer?

Options:
A Dacron
B Neoprene
C Teflon
D Acrylonitrile

The correct answer is:
Dacron

Solution:
Dacron is made by the removal of CH3OH from the constittuents (phthalic acid) and ethylene diol.

Topic: Chemistry, Polymers, NEET
Which among the following is correct during each cardiac cycle?

Options:
A The volume of blood pumped out by the Rt and Lt ventricles is same.
B The volume of blood pumped out by the Rt and Lt ventricles is different
C The volume of blood received by each atrium is different
D The volume of blood received by the aorta and pulmonary artery is different

The correct answer is:
The volume of blood pumped out by the Rt and Lt ventricles is same.

Solution:
The volume of blood pumped out by the Right and Left ventricles is the same in each cardiac cycle.

Topic: Biology, Body Fluids and Circulation, NEET
Which among the following is correct regarding diamagnetic materials?

Options:
A They have a small and positive magnetic susceptibility.
B They have a large and negative magnetic susceptibility.
C They are feebly attracted by magnets.
D

They are feebly repelled by magnets.

The correct answer is:

They are feebly repelled by magnets.

Solution:
1. Diamagnetic materials:

(i) They are feebly repelled by magnets.

(ii) Î§ is negative and very small.

2. Paramagnetic materials:

(i) They are feebly attracted by magnets.

(ii) Î§ is positive and small.

Topic: Physics, Magnetic Effects of Current, NEET
Which among the following is not a prokaryote?

Options:
A Nostoc
B Mycobacterium
C Saccharomyces
D Oscillatoria

The correct answer is:
Saccharomyces

Solution:
Among the given options, Saccharomyces is the scientific name of yeast belongs to kingdom Fungi, i.e. it is a eukaryote. They possess a well-defined nucleus and other cell organelles. Nostoc and Oscillatoria are cyanobacteria, while Mycobacterium is a true bacterium. Cyanobacteria and bacteria both are prokaryotes as they lack a well-defined nucleus and other cell organelles. They belong to the kingdom Monera.

Topic: Biology, Biological Classification, NEET, NEET 2018
Which among the following is not an exact differential?

Options:
A Q (dQ = heat absorbed)
B U (dU = change in internal energy)
C S (dS = entropy change)
D G (dG = Gibbs free energy change)

The correct answer is:
Q (dQ = heat absorbed)

Solution:
Heat 'Q' is a path dependent function, hence its exact differentiation is not possible, however, internal energy, entropy and Gibbs free energy are state functions, hence can be differentiated exactly.

Topic: Chemistry, Thermodynamics (C), NEET
Which among the following is not associated with sewage treatment plant?

Options:
A Biochemical Oxygen Demand
B Formation of flocs
C Activated sludge
D Treatment through scrubber

The correct answer is:
Treatment through scrubber

Solution:
Scrubber is used to remove gaseous pollutants present in air such as SO2. BOD refers to biochemical oxygen demand and is the quantity of oxygen required to aerobically degrade the organic matter present in one liter of water. Flocs are mesh like network of fungal filament with bacterial cells which are formed when aerobic breakdown of organic matter present in sewage takes place.

Topic: Biology, Microbes in Human Welfare, NEET
Which among the following is not true for the hydrolysis of t-butyl bromide with aqueous NaOH?

Options:
A Reaction occurs through the SN1 mechanism.
B The intermediate formed is a carbocation.
C Rate of the reaction doubles when the concentration of alkali is doubled.
D Rate of the reaction doubles when the concentration of t-butyl bromide is doubled.

The correct answer is:
Rate of the reaction doubles when the concentration of alkali is doubled.

Solution:
The reaction between tert-butyl bromide and hydroxide ion yields tert-butyl alcohol and follows the first order kinetics. The rate of reaction depends upon the concentration of only one reactant, which is tertiary butyl bromide.
Rate∝[Reactant]1

Topic: Chemistry, Haloalkanes and Haloarenes, NEET
Which among the following is the most crucial step of the Calvin cycle?

Options:
A Cyclic photphosphorylation
B Carboxylation
C Reduction
D Regeneration

The correct answer is:
Carboxylation

Solution:
Calvin cycle occurs in stroma of chloroplast in which fixation of CO2 to form glucose occurs. In this the most crucial step is carboxylation in which gaseous CO2 is trapped by plants mediated by enzyme RuBisCO and initial CO2 acceptor is 5C RuBP .

Topic: Biology, Photosynthesis in Higher Plants, NEET
Which among the following metals crystallises as a simple cube?

Options:
A Polonium
B Iron
C Copper
D Gold

The correct answer is:
Polonium

Solution:
Polonium crystallises in a simple cube structure.
Copper and Nickel crystallises in a face centred cubic structure.
Iron crystallises in a body centred cubic structure.

Topic: Chemistry, Solid State, NEET
Which among the following phosphorus is most reactive?

Options:
A Red phosphorus
B White phosphorus
C Scarlet phosphorus
D Violet phosphorus

The correct answer is:
White phosphorus

Solution:
White phosphorus is highly reactive, due to angle strain bursting into flames when exposed to air, and is thus stored under water.

Topic: Chemistry, p Block Elements (Group 15, 16, 17 & 18), NEET
Which among the following polymer is an example of fibre?

Options:
A Silk
B Nylon-6, 6
C Dacron
D All of these

The correct answer is:
All of these

Solution:
Silk is protein fibre. Dacron is polyester fibre and Nylon-66 is polyamide fibre.

Topic: Chemistry, Polymers, NEET
Which among the following reagents can be used for the test of carbonyl group in laboratory?

Options:
A NH2OH
B NH2NH2
C NaSO3H
D 2,4-DNPH

The correct answer is:
2,4-DNPH

Solution:
2,4-DNPH is used for the test of carbonyl group in laboratory as a red coloured precipitate is formed

Topic: Chemistry, Aldehydes and Ketones, NEET
Which among the following reagents can convert alkyl halide into alkane

Options:
A Bu3SnH
B Na/dry ether
C R2CuLi
D All of these

The correct answer is:
All of these

Solution:
All these reagent can be used to convert an alkyl halide into alkane

Topic: Chemistry, Hydrocarbons, NEET
Which among the following represent chelating ligands?

Options:
A SCN-
B :C-≡N:
C 2, 2-Dipyridyl
D :O-..H

The correct answer is:
2, 2-Dipyridyl

Solution:
2, 2-Dipyridyl is a bidentate ligand and also causes chelation while rest other are monodentate.

Topic: Chemistry, Coordination Compounds, NEET
Which among the following salt solutions is basic in nature?

Options:
A Ammonium chloride
B Ammonium sulphate
C Ammonium nitrate
D Sodium acetate

The correct answer is:
Sodium acetate

Solution:
CH3COONa⇒ Salt of CH3COOH(WA)+NaOH(SB)
∴ Solution of CH3COONa shows basic nature.

Topic: Chemistry, Ionic Equilibrium, NEET, NEET 2020 (Phase 2)
Which among the following statements are correct?

(i) A â T rich regions of DNA denature at low temperature and are less stable than G â C rich regions.

(ii) RNA is more stable than DNA.

(iii) SNPs are present at about 1 billion locations in humans.

(iv) DNA polymerase I have both 5â²â3â² and 3â²â5â² exonuclease activity.

(v) Rifampicin inhibits RNA synthesis by inhibiting RNA polymerase.

Options:
A (i), (iii) and (iv)
B (i), (ii) and (v)
C (i), (iv) and (v)
D (ii), (iii) and (v)

The correct answer is:
(i), (iv) and (v)

Solution:
SNP or single nucleotide polymorphism is a mutation where a single nucleotide is substituted at specific location. They are found to occur once in every 300 nucleotides on average. Around ten million SNPs are there in the human genome.
DNA sequences rich in G-C are more stable than with A-T rich sequences. The stability is due to stacking interactions called base stacking than hydrogen bonding.
Rifampicin is an antibiotic that is used in preventing bacterial infections. It works by inhibiting RNA polymerase which in turn blocks protein synthesis in bacteria.
DNA polymerase I is a biocatalyst involved in DNA replication process. This enzyme has exonuclease activity in both directions ( 5′â3′ and 3′â5′ ).
DNA is the nucleic acid that forms the genetic material in all organisms. The structure of deoxyribose nucleic acid was elucidated by Watson and Crick. The DNA is a double helical structure having two anti-parallel strands of polynucleotide chains joined to each other by hydrogen bonding formed between the N-bases. It is more stable than ribonucleic acid (RNA) as it has thymine (5-methyl uracil) which has greater resistance to photochemical mutation and deoxyribose (less reactive than ribose).

Topic: Biology, Molecular Basis of Inheritance, NEET
Which among the following statements are true for the complex [Co(NH3)6][Cr(CN)6] ?
(1) It is a non electrolyte
(2) The magnitude of the charge on each complex ion is 3
(3) The complex will not conduct current.
(4) The complex will exhibit coordination isomerism
(5) The magnitude of the charge on each complex ion is 1

Options:
A 1 and 2
B 1 and 3
C 2 and 4
D 3 and 5

The correct answer is:
2 and 4

Solution:
[Co(NH3)6][Cr(CN)6] are coordination isomers and the oxidation numbers of both Co & Cr are +3,+3 .

Topic: Chemistry, p Block Elements (Group 15, 16, 17 & 18), NEET
Which among the following statements is false?

Options:
A Ge(OH)2 is amphoteric
B GeCl2 is more stable than GeCl4
C GeO2 is weakly acidic
D GeCl4 in HCl forms [GeCl6]2- ions

The correct answer is:
GeCl2 is more stable than GeCl4

Solution:
For Ge, +2 oxidation state is less stable than +4, therefore, GeCl2 is less stable than GeCl4 .
A. Ge(OH)2 has both acidic and basic properties.
(a) Ge(OH)2+2HCl→GeCl2+2H2O
(b) Ge(OH)2+KOH→K[Ge(OH)3]
C. Basicity of dioxides of group 14 increases on going down the group and hence, GeO2 is weekly acidic.
D. GeCl4+2HCl→H2[GeCl6] .

Topic: Chemistry, p Block Elements (Group 13 & 14), NEET
Which among the following statements is false ?

Options:
A The correct order of osmotic pressure for 0.01âM aqueous solution of each compound is BaC l 2 >KCl>C H 3 COOH>Sucrose .
B The osmotic pressure π of a solution is given by the equation ( π = Μ Râ¡ Tâ¡ , where M is the molarity of the solution).
C Raoult's law states that the vapour pressure of a component over a solution is proportional to it's mole fraction.
D Two sucrose solutions of the same molality prepared in different solvents will have the same freezing point depression.

The correct answer is:
Two sucrose solutions of the same molality prepared in different solvents will have the same freezing point depression.

Solution:
(i) Osmotic pressure Ï=iââCRT
â´ concentration is same so Ïâi (number of ions)
i for BaC l 2 =3,âKCl=2,âC H 3 COOH â¤ 1<âiâ¤2 and for sucrose =1
So, order of osmotic pressure BaC l 2 >KCl>C H 3 COOH>Sucrose
Acetic acid does not dissociate completely. Hence, its van't Hoff factor will be in between 1 and 2.
(ii) The extent of depression in freezing point varies with the number of solute particles for a fixed solvent only and it's a characteristic feature of the nature of solvent also Î Tâ¡ fâ¡ = k fâ¡ Ã mâ¡
For different solvents,value of k f is also different so, for two different solvents the extent of depression may vary even if same number of solute particles be dissolved in them.

Topic: Chemistry, Solutions, NEET
Which among the following statement/s is/are INCORRECT?

I. Since the origin and from diversification of earth there were four episodes of extinction.
II. The current rate of extinction is 100 to 1000 times faster than in the pre-human times.
III Ecologists warn that if the present trend continues, nearly one-fourth of all the species on earth might be wiped out within the next 100 years.

Options:
A I & II
B II & III
C I & III
D I, II & III

The correct answer is:
I & III

Solution:
Biodiversity includes all the flora and fauna on Earth. All the varieties of organisms come under biodiversity. Ecologist say that without any doubt there is decline in the biological wealth which is more rapid due to the activities of us humans. Study has shown that since the origin and diversification, Earth has faced 5 massive extinctions and we are heading towards the sixth one. And if we continue the current trend of human activities, half of all species will be lost in next 100 years. It is suggested that the current rate of extinction is 100 to 1000 times faster then previous periods before humans.

Topic: Biology, Biodiversity and its Conservation, NEET
Which among the following vector can clone only a small fragment of DNA?

Options:
A Plasmid
B Transposons of maize
C Bacterial artificial chromosome
D Yeast artificial chromosome

The correct answer is:
Plasmid

Solution:
Plasmid is the vector that can clone only a small fragment of DNA. Among the mentioned vectors, only plasmid is used to clone small fragments of DNA. Plasmid is small in size and double-stranded in nature - these actually help the plasmid to clone only a small fragment of DNA.

Topic: Biology, Biotechnology - Principles and Processes, NEET
Which among the given alkenes is most stable?

Options:
A 1-butene
B 2, 3-dimethyl-2-butene
C cis-2-butene
D trans-2-butene

The correct answer is:
2, 3-dimethyl-2-butene

Solution:
Here 2, 3-dimethyl-but-2-ene is most stable and but-1-ene is least stable as per as number of hyperconjugation structures.
trans alkene is more stable than cis alkene.

Topic: Chemistry, General Organic Chemistry, NEET
Which among the given below is an example of halide ore?

Options:
A Cinnabar
B Bauxite
C Galena
D Cryolite

The correct answer is:
Cryolite

Solution:
Cryolite (Na3AlF6)â Halide ore
Cinnaber(HgS)Galena(PbS)Sulphide ore
Bauxite Al2O3.2H2Oâ Oxide ore

Topic: Chemistry, General Principles and Processes of Isolation of Metals, NEET
Which among the given compounds will give thermal elimination?

Options:
A CH3-CH2-Br
B CH3-CH2-OH
C
D All of these

The correct answer is:

Solution:
Ester gives thermal elimination reaction.

Topic: Chemistry, Carboxylic Acid Derivatives, NEET
Which among the given molecules can exhibit tautomerism ?

Options:
A III only.
B Both I and III.
C Both I and II.
D Both II and III.

The correct answer is:
III only.

Solution:
Bridge-head carbon cannot be planar sp2. Therefore, tautomerism will be shown only by and the enolic form would be .

Topic: Chemistry, General Organic Chemistry, NEET, NEET 2016 (Phase 2)
Which among the given molecules can exhibit tautomerism?

Options:
A III only
B Both I and III
C Both I and II
D Both II and III

The correct answer is:
III only

Solution:
In compound I α -Hydrogen at bridge carbon can never participate in tautomerism and in II there is no α -H at I α -C and the other I is bridge C-atom.
Thus, only (II) exhibits tautomerism.

Topic: Chemistry, General Organic Chemistry, NEET
Which among the structure has an elongated, unbranched, pointed, and needle-like apices?

Options:
A Phloem parenchyma
B Phloem fibre
C Companion cells
D Sieve tubes

The correct answer is:
Phloem fibre

Solution:
Phloem fibers are the dead, unbranched structures with needle-like apices. The cell wall is quite thick, without protoplasm. They are also known as Bast fibers. Phloem fibers of jute, flax, and hemp are used commercially.

Topic: Biology, Anatomy of Flowering Plants, NEET
Which among these is the correct combination of aquatic mammals?

Options:
A Seals, Dolphins, Sharks
B Dolphins, Seals, Trygon
C Whales, Dolphins Seals
D Trygon, Whales, Seals

The correct answer is:
Whales, Dolphins Seals

Solution:
Sharks and Trygon (sting ray) are the members of Chondrichthyes (cartilaginous fish) while whale, dolphin and seals are aquatic mammals belong to class Mammalia.

Topic: Biology, Animal Kingdom, NEET, NEET 2017
Which amongst the following aqueous solutions of electrolytes will have minimum elevation in boiling point? Choose the correct option.

Options:
A $0.1 \mathrm{M} \mathrm{MgSO}_4$
B $1 \mathrm{M} \mathrm{NaCl}$
C $0.05 \mathrm{M} \mathrm{NaCl}$
D $0.1 \mathrm{M} \mathrm{KCl}$

The correct answer is:
$0.05 \mathrm{M} \mathrm{NaCl}$

Solution:
$\begin{array}{ll}\text { Solution } & \text { Moles of particles in } 1 \mathrm{~L} \text { solution } \\ 0.1 \mathrm{M} \mathrm{MgSO}_4 & 0.2 \\ 1 \mathrm{M} \mathrm{NaCl} & 2 \\ 0.05 \mathrm{M} \mathrm{NaCl} & 0.1 \\ 0.1 \mathrm{M} \mathrm{KCl} & 0.2\end{array}$
Lesser is the number of particles, lower is the elevation in boiling point

Topic: Chemistry, Solutions, NEET, NEET 2023 (Manipur)
Which amongst the following compounds will show geometrical isomerism?

Options:
A 2-Methylprop-1-ene
B 3,4-Dimethylhex-3-ene
C Pent-1-ene
D 2,3-Dimethylbut-2-ene

The correct answer is:
3,4-Dimethylhex-3-ene

Solution:
3,4-Dimethylhex-3-ene will show geometrical isomerism
trans-3,4-Dimethylhex-3-ene

Topic: Chemistry, Coordination Compounds, NEET, NEET 2023 (Manipur)
Which amongst the following compounds/species is least basic?

Options:
A

B

C

D

The correct answer is:

Solution:
Amides are not basic in nature because of non availability of lone-pair on nitrogen, protonated amide will be even weaker bases.

Topic: Chemistry, Amines, NEET, NEET 2023 (Manipur)
Which amongst the following, is a competitive inhibitor of succinic dehydrogenase?

Options:
A α -ketoglutarate
B Malate
C Malonate
D Oxaloacetate

The correct answer is:
Malonate

Solution:
When the inhibitor closely resembles the substrate in its molecular structure and inhibits the activity of the enzyme, it is known as competitive inhibitor. Due to its close structural similarity with the substrate, the inhibitor competes with the substrate for the substrate binding site of the enzyme. Consequently, the substrate cannot bind and as a result, the enzyme action declines, e.g., inhibition of succinic dehydrogenase by malonate which closely resembles the substrate succinate in structure. Such competitive inhibitors are often used in the control of bacterial pathogens.

Topic: Chemistry, Biomolecules, NEET
Which amongst the following is incorrect statement?

Options:
A C2 molecule has four electrons in its two degenerate π molecular orbitals.
B H2+ ion has one electron.
C O2+ ion is diamagnetic.
D The bond orders of O2+, O2, O2- and O22- are 2.5, 2, 1.5 and 1, respectively.

The correct answer is:
O2+ ion is diamagnetic.

Solution:
1. Electronic configuration of C2 molecule is σ 1s2σ*1s2σ2S2σ*2S2π2Px2=π2py2

Hence it has 4 electrons in π molecular orbitals.

2. H2+ has one electron as one electron is removed from H2 molecule.

3. Electronic configuration of O2+ ion is

σ2s2 σ*2s2 σ2p22 π2Px2=π2Py2π*2px1π*2Py0

It has one unpaired electron so it is para-magnetic.

4. Bond orders of O2+, O2, O2- and O22- are 2.5, 2, 1.5 and 1 respectively.

Topic: Chemistry, Chemical Bonding and Molecular Structure, NEET, NEET 2022 (Phase 1)
Which amongst the following is used in controlling depression and hypertension?

Options:
A Equanil
B Prontosil
C Seldane
D Valium

The correct answer is:
Equanil

Solution:
Tranquilizers and analgesics are neurologically active drugs. Equanil is used in controlling depression and hypertension

Topic: Chemistry, Chemistry in Everyday Life, NEET, NEET 2023 (Manipur)
Which amongst the following options is correct graphical representation of Boyle's Law?

Options:
A
B
C
D

The correct answer is:

Solution:
Boyle's law defined at a constant temperature for given amount of an ideal gas.

According to this law, pressure is inversely related to volume under above conditions.

P=kV

In the above equation k=nRT and it is the slope the curve formed by P vs 1/V. Hence, more the slope, more is the temperature.

Topic: Chemistry, States of Matter, NEET, NEET 2023 (All India)
Which amongst the following options is the correct relation between change in enthalpy and change in internal energy?

Options:
A ∆H+∆U=∆ngR
B ∆H=∆U-∆ngRT
C ∆H=∆U+∆ngRT
D ∆H-∆U=-∆ngRT

The correct answer is:
∆H=∆U+∆ngRT

Solution:
Correct relation between change in enthalpy and change in internal energy is

∆H=∆U+∆ngRT

As we know,

∆H=∆U+P∆V ....(i)

For an ideal gas

PV=nRT

For reactant, PVA=nART

For product, PVB=nBRT

Thus,

P(VB-VA)=(nB-nA)RTP∆V=∆ngRT ......(ii)

Substituting (ii) in (i), we get

∴∆H=∆U+∆ngRT

Topic: Chemistry, Thermodynamics (C), NEET, NEET 2023 (All India)