datavorous/entrance-exam-dataset huggingface dataset:
Which of the following properties don't help in differentiating, different hydrated isomers of CrCl3.6H2O?

Options:
A Conductivity measurements
B Precipitation by AgNO3
C Dipole moment
D Magnetic moment

The correct answer is:
Magnetic moment

Solution:
Different hydrated
(4) Hydrated isomers of CrCl3·6H2O are :

(i) CrH2O6Cl3
(ii) CrH2O5ClCl2·H2O
(iii) CrH2O4Cl2Cl.2H2O
They all have different conductivity, dipole moment and precipitation by AgNO3, They all have similar magnetic moment because in all complexes, ligands are weak field. Cr+3 has 3 unpaired e-

Topic: Chemistry, Coordination Compounds, NEET
Which of the following properties in the options given below will be shown by all of the following organisms?
Trypanosoma, Noctiluca, Monocystis, and Giardia

Options:
A These are all parasites.
B They have flagella.
C They produce spores.
D These are all unicellular protists.

The correct answer is:
These are all unicellular protists.

Solution:
Protista is the kingdom of unicellular eukaryotes. The protists include heterotrophs, autotrophs and some organisms that can vary their nutritional mode depending upon the environmental conditions. Protists occur in freshwater, saltwater, soil and as symbionts within other organisms. Trypanosoma, Noctiluca, Monocystis and Giardia are all unicellular protists.

Topic: Biology, Biological Classification, NEET
Which of the following properties is False for a bar magnet?

Options:
A It doesn't produce magnetic field
B Its like poles repel and unlike poles attract
C Its poles cannot be separated
D It points in North-South direction when suspended

The correct answer is:
It doesn't produce magnetic field

Solution:
A bar magnet produces magnetic field.

Topic: Physics, Magnetic Properties of Matter, NEET
Which of the following properties is not associated with muscles of humans?

Options:
A Exhibits both contractility and extensibility
B Exhibits both excitability and elasticity
C Endodermal in origin and about 20-30 percent of body weight
D Can classified on the basis of location, appearance and function

The correct answer is:
Endodermal in origin and about 20-30 percent of body weight

Solution:
Muscle is a specialised tissue of mesodermal origin. About 40-50 per cent of the body weight of a human adult is contributed by muscles. They have special properties like excitability, contractility, extensibility and elasticity. Muscles have been classified using different criteria, namely location, appearance and nature of regulation of their activities.

Topic: Biology, Locomotion and Movement, NEET
Which of the following properties is not correct to both Be and Al?

Options:
A Be like Al does not dissolve in alkalies
B Oxides of both Be and Al are amphoteric
C Beryllium chloride is covalent like aluminium chloride
D Carbides of both metals react with water liberating methane

The correct answer is:
Be like Al does not dissolve in alkalies

Solution:
Here statement in option A is not correct as Be and Al both dissolve in NaOH to liberate hydrogen.
Be + 2NaOH→ Na 2 BeO 2 Sod.beryllate  +  H 2 (g)
Al+NaOH+2H2Oâ2NaAlO2+3H2(g)
Rest other statements are correct.

Topic: Chemistry, s Block Elements, NEET
Which of the following properties is not of teflon?

Options:
A Resistant to attack of reagent
B Reactive
C Solid
D Chemically Inert

The correct answer is:
Reactive

Solution:
Correct Option is : 2
Reactive

Topic: Chemistry, Polymers, NEET
Which of the following properties is observed in the case of facilitated transport?

a) highly selective
b) transport saturates
c) uphill transport
d) requires special membrane proteins
e) requires ATP energy

Options:
A b, c and d
B a, b and d
C a, d and e
D a, b and c

The correct answer is:
a, b and d

Solution:
In facilitated diffusion special proteins help move substances across membranes without expenditure of ATP energy. Facilitated diffusion cannot cause net transport of molecules from a low to a high concentration â this would require input of energy. Transport rate reaches a maximum when all of the protein transporters are being used (saturation). Facilitated diffusion is very specific: it allows cell to select substances for uptake. It is sensitive to inhibitors which react with protein side chains.

Topic: Biology, Transport in Plants, NEET
Which of the following property is shared by both crystalline solids and amorphous solids?

Options:
A Definite geometric shape
B Definite enthalpy of fusion
C Anisotropic in nature
D Irregular shape

The correct answer is:
Definite enthalpy of fusion

Solution:
Correct Option is : 2
Definite enthalpy of fusion

Topic: Chemistry, Solid State, NEET
Which of the following protects nitrogenase inside the root nodule of a leguminous plant?

Options:
A Catalase
B leg haemoglobin
C Transaminase
D Glutamate dehydrogenase

The correct answer is:
leg haemoglobin

Solution:
$L e g$-Haemoglobin is a pink $\mathrm{O}_2$ scavanger- pigment present in root nodules of leguminous plants. It helps in protection of Nitrogenase from the $\mathrm{O}_2$, as it is $\mathrm{O}_2$-sensitive enzyme.

Topic: Biology, Mineral Nutrition, NEET, NEET 2022 (Phase 2)
Which of the following protein is produced by genetic engineering as a cure for diseases like emphysema?

Options:
A α-1 antitrypsin
B Trypsin
C Chymotrypsin
D All of the above

The correct answer is:
α-1 antitrypsin

Solution:
Alpha-1 Antitrypsin Deficiency (Alpha-1) is a genetic (inherited) condition – it is passed from parents to their children through their genes. Alpha-1 may result in serious lung disease in adults and/or liver disease at any age. Alpha-1 is the most common known genetic risk factor for emphysema. α-1 –antitrypsin can be produced by genetic engineering as cure for diseases like emphysema.

Topic: Biology, Biotechnology and Its Applications, NEET
Which of the following proteins helps in holding DNA together in eukaryotes?

Options:
A Negatively charged proteins
B Acidic proteins
C Amphoteric proteins
D Histone proteins

The correct answer is:
Histone proteins

Solution:
DNA is the genetic material which contains the gene for the cell regulation and activity. DNA is made of the long chain nucleotides which is made of the three components - deoxyribose sugar, N-base and the phosphate group. The DNA has negative charge due to the phosphate backbone which is negatively charged. In prokaryotes, the DNA structure is stabilized and held together by the positively charged proteins which neutralize the charge also. The region of DNA held with proteins in the prokaryotes is called as nucleoid.
Histone proteins are found to hold the DNA and help in it folding in the eukaryotic cells.

Topic: Biology, Molecular Basis of Inheritance, NEET
Which of the following protocols did aim for reducing emission of chlorofluorocarbons into the atmosphere?

Options:
A Montreal Protocol
B Kyoto Protocol
C Gothenburg Protocol
D Geneva Protocol

The correct answer is:
Montreal Protocol

Solution:
Ozone depletion refers to the phenomenon of reductions in the amount of ozone in the stratosphere. The problem of ozone depletion is caused by high levels of chlorine and bromine compounds in the stratosphere. As a result of depletion of the ozone layer, leading to the adoption of the Montreal Protocol banning the use of chlorofluorocarbon (CFC) compounds, as well as other ozone-depleting chemicals such as carbon tetrachloride, trichloroethane (also known as methyl chloroform), and bromine compounds are known as halogens.

Topic: Biology, Environmental Issues, NEET, NEET 2019 (All India)
Which of the following provides the enzyme required to dissolve the callose plugs of pollen tetrads?

Options:
A Epithecium
B Tapetum
C Middle layer
D Endothecium

The correct answer is:
Tapetum

Solution:
Tapetum the innermost layer of the anther that supplies nourishment to developing microspores. It also produces the callase enzyme which is necessary to dissolves callose (four pollens of a pollen tetrad are united cause of this). Thus, separating pollens of a tetrad.

Topic: Biology, Sexual Reproduction in Flowering Plants, NEET
Which of the following quantities are always positive in a simple harmonic motion?

Options:
A F→.a→
B v→.r→
C a→.r→
D F→.r→

The correct answer is:
F→.a→

Solution:
As force is always in the direction of acceleration

Topic: Physics, Oscillations, NEET
Which of the following quantities of heat is taken out of the refrigerator per second, assuming its efficiency is 50% of a perfect engine, when a 1 kW electric motor is used to transfer heat from -3°C to 27°C?

Options:
A 9.5 kJ
B 19 kJ
C 38 kJ
D 76 kJ

The correct answer is:
19 kJ

Solution:
Correct Option is : (B)
19 kJ

Topic: Chemistry, Thermodynamics, NEET
Which of the following quantity does NOT change due to damping of oscillations?

Options:
A Angular frequency
B Time period
C Initial phase
D Amplitude

The correct answer is:
Initial phase

Solution:
δ is the initial phase. When oscillations of pendulum are damped, δ doesn't change

Topic: Physics, Oscillations, NEET
Which of the following questions could not be answered by Werner's theory of coordination compounds?(i) Why do only certain elements possess the remarkable property of forming coordination compounds?(ii) Why do the bonds in coordination compounds have directional properties?(iii) Why do coordination compounds have characteristic magnetic and optical properties?

Options:
A Only (i)
B Only (ii)
C Only (iii)
D All of the above

The correct answer is:
All of the above

Solution:
Werner's theory could not answer questions (i), (ii), and (iii).

Topic: Chemistry, Coordination Compounds, NEET
Which of the following radioactive isotope will be used in the detection of thyroid cancer?

Options:
A Iodine-131
B Carbon-14
C Uranium-238
D Phosphorus-32

The correct answer is:
Iodine-131

Solution:
Iodine is an element used by the thyroid gland for the synthesis of thyroid hormones. Thus, radioactive isotope Iodine-131 is used as radioactive material for the detection of thyroid cancer.

Topic: Biology, Chemical Coordination and Integration, NEET
Which of the following ratio is correct regarding dehydrogenation: decarboxylation: substrate-level phosphorylation steps in the TCA cycle?

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

The correct answer is:
4 : 2 : 1

Solution:
Krebs cycle (also known as citric acid cycle or tricarboxylic acid cycle) is a step wise cyclic process which is used to oxidize the pyruvate formed during the glycolytic breakdown of glucose into carbon dioxide (CO2) and Water (H2O). Krebs cycle is a stepwise cyclic oxidation process in which four dehydrogenation steps and two decarboxylations steps of active acetate group take place to produce reduced co-enzymes and carbon dioxide.

Topic: Biology, Respiration in Plants, NEET
Which of the following ratios is generally constant for a given species?

Options:
A A+T/G+C
B T+C/A+G
C A+C/T+G
D G+C/A+T

The correct answer is:
A+T/G+C

Solution:
According to Chargaff, purines and pyrimidines are in equal amounts. Purine (adenine) is equimolar with pyrimidine (thymine) and purine (guanine) is equimolar with pyrimidine (cytosine).
The base ratio of A+T/G+C is specific for species.

Topic: Biology, Molecular Basis of Inheritance, NEET
Which of the following ratios represents the average kinetic energy per molecule of the mixture in the flask containing argon and chlorine in a 2:1 mass ratio at a temperature of 27°C?Atomic mass of argon = 39.9 u; Molecular mass of chlorine = 70.9 u.

Options:
A 1:2
B 2:1
C 1:1
D 2:3

The correct answer is:
1:1

Solution:
Correct Option is : (C)
1:1

Topic: Chemistry, Kinetic Theory of Gases, NEET
Which of the following ratios represents the relationship between the absolute scales A and B, where the triple points of water are defined as 200 A and 350 B?

Options:
A 4:7
B 7:4
C 1:3
D 3:1

The correct answer is:
4:7

Solution:
Correct Option is : (A)
4:7

Topic: Chemistry, Thermal Properties of Matter, NEET
Which of the following ratios represents the root mean square speed (vrms) of the molecules of argon and chlorine in a mixture at 27°C when they are present in a 2:1 mass ratio?Atomic mass of argon = 39.9 u; Molecular mass of chlorine = 70.9 u.

Options:
A 1.66
B 1.77
C 1.33
D 2.33

The correct answer is:
1.77

Solution:
Correct Option is : (B)
1.77

Topic: Chemistry, Kinetic Theory of Gases, NEET
Which of the following rays are not electromagnetic waves?

Options:
A X-rays
B $\gamma$-rays
C $\beta$-rays
D heat rays

The correct answer is:
$\beta$-rays

Solution:
$\beta$-rays are not electromagnetic waves.

Topic: Physics, Electromagnetic Waves, NEET, NEET 2003
Which of the following reaction characteristics at constant temperature are changing by the addition of a catalyst to a reaction
(i) Activation energy
(ii) Equilibrium constant
(iii) Reaction entropy
(iv) Reaction enthalpy

Options:
A (i) only
B (iii) only
C (i) and (ii) only
D All of these

The correct answer is:
(i) only

Solution:
Catalyst affect only activation energy. It brings down the activation energy of reaction.

Topic: Chemistry, Chemical Kinetics, NEET
Which of the following reaction does not form an ether?

Options:
A C6H6OH+RBrâaq.NaOH
B
C (CH3)3CCl+C2H5O-Na+â
D CH3CH2OHâ413 KH2SO4

The correct answer is:
(CH3)3CCl+C2H5O-Na+→

Solution:
Because of strong basicity of the alkoxide ion, elimination reaction predominates over substitution reaction, if we use tertiary halide.
(A) C6H5OH+RBr→aq.NaOHC6H5OR+NaBr+H2O
(B)
(D)

Topic: Chemistry, Alcohols Phenols and Ethers, NEET
which of the following reaction explains a smelting process?

Options:
A ZnCO3→ZnO+CO2
B Fe2O3+3C→2Fe+3CO
C 2PbS+3O2→2PbO+2SO2
D Al2O3·2H2O→Al2O3+2H2O

The correct answer is:
Fe2O3+3C→2Fe+3CO

Solution:
ZnCO3→ZnO+CO2, It shows the calcination process, Heating of hydrated and carbonated ore in the absence of the air then metal oxide will form.
Fe2O3+3C→2Fe+3CO, This is the smelting process. In this process reduction of metal oxide in the presence of the suitable reducing agent like C and CO to get the metal oxide.

2PbS+3O2→2PbO+2SO2, This is the roasting process. In this process, heating of the sulphide ores in the presence of the air to obtain the metal oxide.

Al2O3·2H2O→Al2O3+2H2O, This is the calcination process.

Topic: Chemistry, General Principles and Processes of Isolation of Metals, NEET
Which of the following reaction follows SN1 mechanism?

Options:
A CH33C-CH2Cl+CH3OK
B CH32CHCH2Cl+KCN
C CH33C-Cl+NaOH(aq.)
D CH32CHI+H2O

The correct answer is:
CH33C-Cl+NaOH(aq.)

Solution:
( CH 3 ) 3 C−Cl→ ( CH 3 ) 3 C + + Cl −
CH33Câ¨+NaOHâ¶CH33C-OH+Na+
3o halides undergo reaction by SN1 mechanism because of formation of stable carbocation.

Topic: Chemistry, Haloalkanes and Haloarenes, NEET
Which of the following reaction involves substrate-level phosphorylation?

Options:
A 2-phosphoglycerate to 2- phosphoenolpyruvate
B Fructose to Fructose -6- phosphate
C Phosphoenolpyruvic acid to pyruvic acid
D Fructose 1 , 6- bisphosphate to PGAL and DHAP

The correct answer is:
Phosphoenolpyruvic acid to pyruvic acid

Solution:
ATP is synthesized in a reaction when phosphoenol pyruvic acid is converted to pyruvic acid. This direct synthesis of ATP is called transphosphorylation or substrate-level phosphorylation.

Topic: Biology, Respiration in Plants, NEET
Which of the following reaction is appropriate for converting acetamide to methanamine?

Options:
A Carbylamine reaction
B Hofmann bromamide reaction
C Stephens reaction
D Gabriels phthalimide synthesis

The correct answer is:
Hofmann bromamide reaction

Solution:
CH 3 - C || O - NH 2 + Br 2 + 4 NaOH → Δ CH 3 - NH 2 + 2 NaBr + Na 2 CO 3 + 3 H 2 O
This is Hofmann bromamide reaction.

Topic: Chemistry, Amines, NEET, NEET 2017
Which of the following reaction is involved in the preparation of K2Cr2O7from chromite ore?

Options:
A CrO42-+ 4H2O + 3e−→ Cr(OH)3+ 5OH−
B K2CrO4+ Ba(NO3)2↔ BaCrO4+ 2KNO3
C 2Na2CrO4+ 2H+→ Na2Cr2O7+ 2 Na++ H2O
D H2CrO4⇌ HCrO−4+ H+

The correct answer is:
2Na2CrO4+ 2H+→ Na2Cr2O7+ 2 Na++ H2O

Solution:
Correct Option is : (C)
2Na2CrO4+ 2H+→ Na2Cr2O7+ 2 Na++ H2O

Topic: Chemistry, d and f Block Elements, NEET
Which of the following reaction is possible?

Options:
A CH3-Br→O-H
B CH3OH→Br-
C
D HC≡CH→NaOH

The correct answer is:
CH3-Br→O-H

Solution:
As O-H is stronger nucleophile than Br- so it can substitute it and reaction is possible.
CH3-Br→O-HCH3-OH
Rest other reaction here are not possible.

Topic: Chemistry, Alcohols Phenols and Ethers, NEET
Which of the following reaction requires enzyme pyruvate dehydrogenase?

Options:
A Pyruvate to acetic acid
B Pyruvate to acetaldehyde
C Pyruvate to lactic acid
D Pyruvate to acetyl CoA

The correct answer is:
Pyruvate to acetyl CoA

Solution:
Conversion of pyruvate to acetyl CoA occurs as follows:

Topic: Biology, Respiration in Plants, NEET
Which of the following reaction will not liberate ethyne gas?

Options:
A CH3Cl and Ag
B CaC2 and H2O
C CHI3 and Ag
D All are equally reactive

The correct answer is:
CH3Cl and Ag

Solution:
a. No reaction
b. CaC 2 + 2 H 2 O â HC â¡ CH + Ca OH 2
c.

Topic: Chemistry, Haloalkanes and Haloarenes, NEET
Which of the following reaction will not produce a racemic product?

Options:
A
B
C
D

The correct answer is:

Solution:
In rest of all other option, the given reaction resulting in the racemic product as they pose chiral carbon. for example

Topic: Chemistry, Hydrocarbons, NEET
Which of the following reactions are disproportionation reaction?

a 2Cu+→Cu2++Cu0

b 3MnO42-+4H+→2MnO4-+MnO2+2H2O

c 2KMnO4→∆K2MnO4+MnO2+O2

d 2MnO4-+3Mn2++2H2O→5MnO2+4H⊕

Select the correct option from the following:

Options:
A a and b only
B a, b and c
C a,Â c and d
D a and d only

The correct answer is:
a and b only

Solution:
The redox reactions in which the same species is getting oxidised (increase in oxidation number) and reduced (decrease in oxidation number).

(i) 2Cu+(+1)→Cu+2(+2)+Cu0(0)→ Disproportionation

(ii) 3MnO42-(+6)+4H+→2MnO4-(+7)+MnO2(+4)+2H2O→ Disproportionation

(iii) 2KMnO4+7→ΔK2MnO4+6+MnO2+4+O2

Only reduction is happening here.

(iv) 2MnO4-+7+3Mn+2+2→5MnO2+4

Different species are getting oxidised and reduced. Hence, the correct options are (i) and (ii) only.

Topic: Chemistry, Redox Reactions, NEET, NEET 2019 (All India)
Which of the following reaction(s) can be used for the preparation of alkyl halides?

I. CH3CH2OH+HClâAnhyd. ZnCl2

II. CH3CH2OH+HClâ¶

III. CH33COH+HClâ¶

IV. CH32CHOH+HClâAnhyd. ZnCl2

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

The correct answer is:
I III and IV only

Solution:
I and IV can be used due to presence of anhydrous ZnCl2
(III) which gives alkyl halide due to formation of more stable carbocation.

Topic: Chemistry, Haloalkanes and Haloarenes, NEET, NEET 2015 (Phase 2)
Which of the following reaction(s) can be used for the preparation of alkyl halides?

I. CH3CH2OH+HClâAnhyd. ZnCl2

II. CH3CH2OH+HClâ¶

III. CH33COH+HClâ¶

IV. CH32CHOH+HClâAnhyd. ZnCl2

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

The correct answer is:
I and IV only

Solution:
I and IV can be used due to presence of anhydrous ZnCl2 (III) which gives alkyl halide due to formation of more stable carbocation.

Topic: Chemistry, Alcohols Phenols and Ethers, NEET
Which of the following reactions cannot be explained by the open-chain structure of D-glucose?

Options:
A Acetylation of glucose with acetic anhydride gives glucose pentaacetate which confirms the presence of five –OH groups.
B Glucose gets oxidized to six carbon carboxylic acid (gluconic acid)
C Glucose reacts with hydroxylamine to form an oxime and adds a molecule of hydrogen cyanide to give cyanohydrin.
D Despite having the aldehyde group, glucose does not give Schiff’s test and it does not form the hydrogen sulfite addition product with NaHSO3.

The correct answer is:
Despite having the aldehyde group, glucose does not give Schiff’s test and it does not form the hydrogen sulfite addition product with NaHSO3.

Solution:
Correct Option is : (D)
Despite having the aldehyde group, glucose does not give Schiff’s test and it does not form the hydrogen sulfite addition product with NaHSO3.

Topic: Chemistry, Biomolecules, NEET
Which of the following reactions cannot explain why D-Glucose was assigned the following structure?

Options:
A The pentaacetate of glucose does not react with hydroxylamine indicating the absence of a free CHO group.
B Acetylation of glucose with acetic anhydride gives glucose pentaacetate which confirms the presence of five –OH groups
C On prolonged heating with HI, it forms n-hexane
D On oxidation with nitric acid, glucose as well as gluconic acid both yield a dicarboxylic acid, saccharic acid.

The correct answer is:
The pentaacetate of glucose does not react with hydroxylamine indicating the absence of a free CHO group.

Solution:
Correct Option is : (A)
The pentaacetate of glucose does not react with hydroxylamine indicating the absence of a free CHO group.

Topic: Chemistry, Biomolecules, NEET
Which of the following reactions contributes to the formation of photochemical smog?

Options:
A

B

C

D

The correct answer is:

Solution:
Correct Option is : (A)

Topic: Chemistry, Environmental Chemistry, NEET
Which of the following reactions does not involve oxidation-reduction?

Options:
A 2Rb+H2O→2RbOH+H2
B 2CuI2→2CuI+I2
C CuO+H2→Cu+H2O
D 4KCN+Fe(CN)2→K4[Fe(CN)6]

The correct answer is:
4KCN+Fe(CN)2→K4[Fe(CN)6]

Solution:
There is no change in the oxidation number of any species in the reaction so neither oxidation nor reduction occurs here.
4KCN+Fe(CN)2→K4[Fe(CN)6]

Topic: Chemistry, Redox Reactions, NEET
Which of the following reactions does not release CO2?

Options:
A Alcohol fermentation
B Aerobic respiration
C Lactic acid fermentation
D Amphibolic pathway

The correct answer is:
Lactic acid fermentation

Solution:
In lactic acid fermentation, CO2 is not released, as there is no step of decarboxylation unlike alcohol fermentation. The alcohol fermentation includes the decarboxylation of pyruvic acid to Acetaldehyde, which is further reduced to ethanol due to the reducing agent NADH (which gets oxidized to NAD+. Aerobic respiration (amphibolic pathway) releases CO2 due to oxidative decarboxylation of pyruvic acid to Acetyl-CoA.

Topic: Biology, Respiration in Plants, NEET
Which of the following reactions does not take place?

Options:
A F2+2Cl-â2F-+Cl2
B Br 2 +2 I − →2 Br − + I 2
C Cl2+2Br-â2Cl-+Br2
D Cl2+2F-â2Cl-+F2

The correct answer is:
Cl2+2F-→2Cl-+F2

Solution:
Cl2 cannot displace F2 but F2 can displace Cl2 on account of its higher electronegativity.
The SRP value of F2 is highest in the electrochemtextcal series. So it will oxidise chlorine.

Topic: Chemistry, p Block Elements (Group 15, 16, 17 & 18), NEET
Which of the following reactions involves the addition of dihydrogen to a carbon-carbon double bond?

Options:
A Dehydration
B Hydrogenation
C Oxidation
D Substitution

The correct answer is:
Hydrogenation

Solution:
Hydrogenation is the reaction that involves the addition of dihydrogen (H2) to a carbon-carbon double bond to form a single bond, converting an alkene into an alkane.

Topic: Chemistry, Hydrocarbons, NEET
Which of the following reactions is a decomposition redox reaction?

Options:
A $2 \mathrm{~Pb}\left(\mathrm{NO}_3\right)_2(\mathrm{~s}) \rightarrow 2 \mathrm{PbO}(\mathrm{s})+4 \mathrm{NO}_2(\mathrm{~g})+\mathrm{O}_2$ (g)
B $\mathrm{N}_2(\mathrm{~g})+\mathrm{O}_2(\mathrm{~g}) \rightarrow 2 \mathrm{NO}(\mathrm{g})$
C $\mathrm{Cl}_2(\mathrm{~g})+2 \mathrm{OH}(\mathrm{aq}) \rightarrow \mathrm{ClO}^{-}(\mathrm{aq})+\mathrm{Cl}^{-}(\mathrm{aq})$ $+4 \mathrm{H}_2 \mathrm{O}(l)$
D $\mathrm{P}_4(\mathrm{~s})+3 \mathrm{OH}(\mathrm{aq})+3 \mathrm{H}_2 \mathrm{O}(\mathrm{l}) \rightarrow \mathrm{PH}_3(\mathrm{~g}) +3 \mathrm{H}_2 \mathrm{PO}_2^{-}(\mathrm{aq})$

The correct answer is:
$2 \mathrm{~Pb}\left(\mathrm{NO}_3\right)_2(\mathrm{~s}) \rightarrow 2 \mathrm{PbO}(\mathrm{s})+4 \mathrm{NO}_2(\mathrm{~g})+\mathrm{O}_2$ (g)

Solution:
Redox decomposition reaction is associated with breakdown of a large molecule into smaller molecule with change in oxidation state.

Topic: Chemistry, Redox Reactions, NEET, NEET 2022 (Phase 2)