datavorous/entrance-exam-dataset huggingface dataset:
Sucrose is dextrorotatory but the mixture obtained after hydrolysis is laevorotatory. Explain.

Options:
A Hydrolysis of sucrose reverses the direction of polarized light.
B Hydrolysis of sucrose produces equal amounts of dextrorotatory and laevorotatory compounds.
C Hydrolysis of sucrose forms glucose and fructose, both of which are laevorotatory.
D On hydrolysis sucrose (dextrorotatory), gives glucose (dextrorotatory, + 52.5°) and fructose (laevorotatory, – 92.4°). Since laevorotation of fructose is more than the dextrorotation of glucose, the mixture is laevorotatory.

The correct answer is:
On hydrolysis sucrose (dextrorotatory), gives glucose (dextrorotatory, + 52.5°) and fructose (laevorotatory, – 92.4°). Since laevorotation of fructose is more than the dextrorotation of glucose, the mixture is laevorotatory.

Solution:
Correct Option is : (D)
On hydrolysis sucrose (dextrorotatory), gives glucose (dextrorotatory, + 52.5°) and fructose (laevorotatory, – 92.4°). Since laevorotation of fructose is more than the dextrorotation of glucose, the mixture is laevorotatory.

Topic: Chemistry, Biomolecules, NEET
Sucrose on hydrolysis gives

Options:
A α -D-Glucose +β -D-Glucose
B α -D-Glucose +β -D-Fructose
C α -D-Fluctorse +β -D-Fructose
D β -D-Glucose +α -D-Fructose

The correct answer is:
α -D-Glucose +β -D-Fructose

Solution:
Hydrolysis breaks the glycosidic bond converting sucrose into glucose and fructose.

Sucrose H3O+(Hydrolysts)→α -D-Glucose +β -D- Fructose

Topic: Chemistry, Biomolecules, NEET, NEET 2020 (Phase 1)
Sudden addition or deletion of genes by chance in a small population is called

Options:
A Sewall Wright effect
B Mutation
C Gene flow
D Gene migration

The correct answer is:
Sewall Wright effect

Solution:
Genetic drift or Sewall Wright effect is change in the allelic frequency of a population. This occurs due to random sampling and is seen in small populations. Genetic drift can be of two types: Bottleneck effect and Founder effect. When random change occurs in a population due to any disaster events ,it is known as bottlenec effect. In Founder effect only few individuals colonise an island thus changing the gene frequency.

Topic: Biology, Evolution, NEET
Sugar of lead or lead sugar is

Options:
A 2PbSO4.PbO
B (CH3COO)2Pb
C PbCO3
D PbCO3.Pb(OH)2

The correct answer is:
(CH3COO)2Pb

Solution:
Sugar of lead is (CH3COO)2Pb lead acetate, a white crystalline compound with slightly sweet taste.

Topic: Chemistry, d and f Block Elements, NEET
Sugar present in DNA is

Options:
A D-Deoxyribofuranose
B D-Deoxyribopyranose
C D-ribofuranose
D D-Ribopyranose

The correct answer is:
D-Deoxyribopyranose

Solution:
The sugar in DNA is deoxyribose and this ribose is present in furanose form.

Topic: Chemistry, Biomolecules, NEET
Sugars are technically called carbohydrates, referring to the fact that their formulas are only multiple of C₂(HO). Hexoses, therefore, have six carbons, twelve hydrogens and six oxygen atoms. Glucose is a hexose. Choose from among the following another hexose.

Options:
A Fructose
B Erythrose
C Ribulose
D Ribose

The correct answer is:
Fructose

Solution:
Fructose is a hexose.

Topic: Biology, Biomolecules (B), NEET
Suggest a list of metals that are extracted electrolytically.

Options:
A Aluminium
B Silver
C Gold
D All of the above

The correct answer is:
All of the above

Solution:
Correct Option is : (D)
All of the above

Topic: Chemistry, Electrochemistry, NEET
Suggest a reagent for the following conversion:

Options:
A Pyridinium Chlorochromate [PCC]
B Br2/ CCl4
C LiAlH4
D NaI / Acetone

The correct answer is:
Pyridinium Chlorochromate [PCC]

Solution:
Correct Option is : (A)
Pyridinium Chlorochromate [PCC]

Topic: Chemistry, Alcohols Phenols and Ethers, NEET
Suggest a scheme of classification for the following redox reactions: (a) N₂ (g) + O₂ (g) → 2 NO (g) Classification Scheme:

Options:
A Combination Reactions
B Displacement Reactions
C Decomposition Reactions
D Disproportionation Reactions

The correct answer is:
Combination Reactions

Solution:
Correct Option is : (A)
Combination Reactions

Topic: Chemistry, Redox Reactions, NEET
Suggest a scheme of classification for the following redox reactions: (b) 2Pb(NO₃)₂ (s) → 2PbO (s) + 4 NO₂ (g) + O₂ (g) Classification Scheme:

Options:
A Combination Reactions
B Displacement Reactions
C Decomposition Reactions
D Disproportionation Reactions

The correct answer is:
Decomposition Reactions

Solution:
Correct Option is : (C)
Decomposition Reactions

Topic: Chemistry, Redox Reactions, NEET
Suggest a scheme of classification for the following redox reactions: (c) NaH (s) + H₂O (l) → NaOH (aq) + H₂ (g) Classification Scheme:

Options:
A Combination Reactions
B Displacement Reactions
C Decomposition Reactions
D Disproportionation Reactions

The correct answer is:
Combination Reactions

Solution:
Correct Option is : (A)
Combination Reactions

Topic: Chemistry, Redox Reactions, NEET
Suggest a scheme of classification for the following redox reactions: (d) 2NO₂ (g) + 2OH⁻ (aq) → NO₂⁻ (aq) + NO₃⁻ (aq) + H₂O (l) Classification Scheme:

Options:
A Combination Reactions
B Displacement Reactions
C Decomposition Reactions
D Disproportionation Reactions

The correct answer is:
Disproportionation Reactions

Solution:
Correct Option is : (D)
Disproportionation Reactions

Topic: Chemistry, Redox Reactions, NEET
Suggest a way to determine the Λ° m value of water.

Options:
A Measure the conductivity of a known concentration of water
B Measure the temperature of water
C Measure the pH of water
D Measure the mass of water

The correct answer is:
Measure the conductivity of a known concentration of water

Solution:
Correct Option is : (A)
Measure the conductivity of a known concentration of water

Topic: Chemistry, Electrochemistry, NEET
Suggest reasons why the B–F bond lengths in BF₃ (130 pm) and BF₄⁻ (143 pm) differ.

Options:
A The presence of the additional F atom in BF₄⁻ leads to increased electron density around the boron atom, causing a longer bond.
B The repulsion between the lone pair on the central boron atom in BF₄⁻ causes a longer bond compared to BF₃.
C The electronegativity of boron is lower than that of fluorine, resulting in a longer bond length in BF₄⁻.
D The symmetry of the BF₄⁻ ion leads to shorter bond lengths compared to the asymmetry of BF₃.

The correct answer is:
The repulsion between the lone pair on the central boron atom in BF₄⁻ causes a longer bond compared to BF₃.

Solution:
Correct Option is : (B)
The repulsion between the lone pair on the central boron atom in BF₄⁻ causes a longer bond compared to BF₃.

Topic: Chemistry, p Block Elements (Group 15, 16, 17 & 18), NEET
Suggest the most important type of intermolecular attractive interaction in the following pairs. (i) NaClO4and water (ii) methanol and acetone and (iii) acetonitrile (CH3CN) and acetone(C3H6O).

Options:
A (i) Ion - dipole interactions , (ii) Ion-dipole interaction and (iii) Dipole - dipole interactions
B (i) Ion - dipole interactions , (ii) Hydrogen bonding and (iii) Dipole - dipole interactions
C (i) Ion - dipole interactions , (ii) Ion-dipole interaction and (iii) Ion - dipole interactions
D (i) Dipole - dipole interactions , (ii) Dipole-dipole interaction and (iii) Dipole - dipole interactions

The correct answer is:
(i) Ion - dipole interactions , (ii) Hydrogen bonding and (iii) Dipole - dipole interactions

Solution:
Correct Option is : (B)
(i) Ion - dipole interactions , (ii) Hydrogen bonding and (iii) Dipole - dipole interactions

Topic: Chemistry, Solutions, NEET
Suggest the most important type of intermolecular attractive interaction in the following pairs. (i) n-hexane and n-octane and (ii) I2and CCl4

Options:
A (i) London dispersion forces and (ii) London dispersion forces
B (i) London dispersion forces and (ii) Ion-dipole forces
C (i) Dipole-dipole forces and (ii) London dispersion forces
D (i) Dipole-dipole forces and (ii) Ion-dipole forces

The correct answer is:
(i) London dispersion forces and (ii) London dispersion forces

Solution:
Correct Option is : (A)
(i) London dispersion forces and (ii) London dispersion forces

Topic: Chemistry, Solutions, NEET
Suggest two materials other than hydrogen that can be used as fuels in fuel cells.

Options:
A Methane, Methanol
B Oxygen, Nitrogen
C Propane, Ethanol
D Helium, Argon

The correct answer is:
Methane, Methanol

Solution:
Correct Option is : (A)
Methane, Methanol

Topic: Chemistry, Electrochemistry, NEET
Sulphide ores of metals are usually concentrated by froth flotation process. Which one of the following sulphide ores offer an exception and is concentrated by chemical leaching?

Options:
A Galena
B Copper pyrite
C Sphalerite
D Argentite

The correct answer is:
Argentite

Solution:
Argentitie or Silver glance, $\mathrm{Ag}_2 \mathrm{~S}$ is an ore of silver. Silver is extracted from argentite by the mac-Arthur and Forest process (leaching process).
$\begin{aligned}
& \mathrm{Ag}_2 \mathrm{~S}+4 \mathrm{NaCN} \rightarrow 2 \mathrm{Na}\left[\mathrm{Ag}(\mathrm{CN})_2\right]+\mathrm{Na}_2 \mathrm{~S} \\
& 4 \mathrm{Au}+8 \mathrm{KCN}+2 \mathrm{H}_2 \mathrm{O}+\mathrm{O}_2 \rightarrow 4 \mathrm{~K}\left[\mathrm{Au}(\mathrm{CN})_2\right]+4 \mathrm{KOH}
\end{aligned}$
Related Theory
Leaching is the selective dissolution of the desired mineral leaving behind the impurities in a suitable dissolving agent.

Topic: Chemistry, General Principles and Processes of Isolation of Metals, NEET, NEET 2007
Sulphonation of phenol with concentration H2SO4 at 288-293 K gives

Options:
A o-phenol sulphonic acid
B p-phenol sulphonic acid
C sulphanilic acid
D picric acid

The correct answer is:
o-phenol sulphonic acid

Solution:
Sulphonation of phenol with concentration H2SO4 at 288-293 K gives o-phenol sulphonic acid.

Topic: Chemistry, Alcohols Phenols and Ethers, NEET
Sulphur dioxide causes
I. respiratory diseases in human beings.
II. red haze in the traffic.
III. Irritation of the eyes.
The correct option is

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

The correct answer is:
Both I and III

Solution:
Sulfur dioxide affects human health when it is breathed in. It irritates the nose, throat, and airways to cause coughing, wheezing, shortness of breath, or a tight feeling around the chest. Those most at risk of developing problems if they are exposed to sulfur dioxide are people with asthma or similar conditions.

Topic: Chemistry, p Block Elements (Group 15, 16, 17 & 18), NEET
Sulphur is an important nutrient for optimum growth and productivity in:

Options:
A oilseed crops
B pulse crops
C cereals
D fibre crops

The correct answer is:
pulse crops

Solution:
Sulphur is a constituent of certain amino acids. The amino acids form the protein by polymerisation. Because pulses are rich in protein, sulphur is required for the proper growth of pulses.

Topic: Biology, Strategies for Enhancement in Food Production, NEET, NEET 2006
Sulphur is present in:

Options:
A Cysteine and Proline
B Methionine and Proline
C Methionine and Cysteine
D Methionine and Leucine

The correct answer is:
Methionine and Cysteine

Solution:
Sulphur is a macronutrient as well as forms a part of the structural component of the cells. It has various forms like sulphate SO42-, sulphite SO32-. The plants get this element in the form of sulphate. Sulphur is also present in the amino acids- cysteine and methionine, and these two amino acids are also said to be incorporated into proteins.

Topic: Chemistry, Biomolecules, NEET
Sulphur is present in

Options:
A Cysteine and Methionine
B Ferredoxin and Coenzyme A
C All amino acids
D Both A and B

The correct answer is:
Both A and B

Solution:
Cysteine and Methionine are sulphur containing amino acids. Chemical formula of cysteine is C3H7NO2S . Chemical formula of Methionine is : C5H11NO2S . Ferrodoxin (Fd) is present in the chloroplast and brings about electron transfer in photosynthesis. It is iron-sulphur cluster. Coenzyme A is very important coenzyme in citric acid cycle as it brings about oxidation of pyruvate. Its chemical formula is ‎ C21H36N7O16P3S

Topic: Chemistry, Biomolecules, NEET
Sulphur reacts with chlorine 1 : 2 ratio and forms X. Hydrolysis of X gives a sulphur compound Y. What is the hybridisation state of central atom in the anion of Y?

Options:
A sp3
B sp
C sp2
D sp2d

The correct answer is:
sp3

Solution:
Here X is SCl4 and Y is H2SO3
S+2Cl2→SCl4(X)
SCl4+3H2O→H2SO3Y+4HCl
In SO32- , sulphur has sp3 hybridization.

Topic: Chemistry, p Block Elements (Group 15, 16, 17 & 18), NEET
Sulphur trioxide can be obtained by which of the following reaction

Options:
A $\mathrm{CaSO}_4+\mathrm{C} \stackrel{\Delta}{\longrightarrow}$
B $\mathrm{Fe}_2\left(\mathrm{SO}_4\right)_3 \stackrel{\Delta}{\longrightarrow}$
C $\mathrm{S}+\mathrm{H}_2 \mathrm{SO}_4 \stackrel{\Delta}{\longrightarrow}$
D $\mathrm{H}_2 \mathrm{SO}_4+\mathrm{PCl}_5 \stackrel{\Delta}{\longrightarrow}$

The correct answer is:
$\mathrm{Fe}_2\left(\mathrm{SO}_4\right)_3 \stackrel{\Delta}{\longrightarrow}$

Solution:
$\text {(a) } \mathrm{CaSO}_4+\mathrm{C} \stackrel{\Delta}{\longrightarrow} \mathrm{CaO}+\mathrm{SO}_2+\mathrm{CO}$
(b) $\mathrm{Fe}_2\left(\mathrm{SO}_4\right)_3 \stackrel{\Delta}{\longrightarrow} \mathrm{Fe}_2 \mathrm{O}_3+3 \mathrm{SO}_3$
(c) $\mathrm{S}+2 \mathrm{H}_2 \mathrm{SO}_4 \stackrel{\Delta}{\longrightarrow} 3 \mathrm{SO}_2+2 \mathrm{H}_2 \mathrm{O}$
(d) $\mathrm{H}_2 \mathrm{SO}_4+\mathrm{PCl}_5 \stackrel{\Delta}{\longrightarrow} \mathrm{SO}_3 \mathrm{HCl}+\mathrm{POCl}_3+\mathrm{HCl}$
$\mathrm{SO}_3 \mathrm{HCl}$ is chloro sulphonic acid
Thus, $\mathrm{SO}_3$ is obtained by heating $\mathrm{Fe}_2\left(\mathrm{SO}_4\right)_3$.

Topic: Chemistry, p Block Elements (Group 15, 16, 17 & 18), NEET, NEET 2012 (Screening)
Sum of pi bonds present in both compounds C2H2and C2H4?

Options:
A 3
B 2
C 1
D 5

The correct answer is:
3

Solution:
Correct Option is : (A)
3

Topic: Chemistry, Chemical Bonding and Molecular Structure, NEET
Sun subtends an angle of 0.5° at the centre of curvature of a concave mirror of radius of curvature 15 m. The diameter of the image of the sum formed by the mirror is

Options:
A 8.55 cm
B 7.55 cm
C 6.55 cm
D 5.55 cm

The correct answer is:
6.55 cm

Solution:
θ=12×π180 rad
diametar of imagefocal length=θ
Or diameter of image
=12×π180×152×100 cm=6.55 cm

Topic: Physics, Ray Optics, NEET
Superbug claimed to clean up oil spills in the ocean is

Options:
A Escherichia coli
B Bacillus thuringiensis
C Pastuerella pestis
D Pseudomonas putida

The correct answer is:
Pseudomonas putida

Solution:
Oil spills are devastating to the environment as these are known to be fatal to marine organisms. Bioremediation uses microorganisms to break down pollutants into less toxic form.
The Pseudomonas putida is a Gram-ve rod-shaped, saprophytic soil microbe with diverse metabolism. It has the ability to degrade organic solvents and this ability has been used in the bioremediation process. It is considered as a superbug due to its ability to break down oil.
One of its variety called multiplasmid hydrocarbon-degrading Pseudomonas is the first patented organism in the world.

Topic: Biology, Microbes in Human Welfare, NEET
Superior ovary is present in

Options:
A Guava
B Mustard
C Cucumber
D Plum

The correct answer is:
Mustard

Solution:
Superior ovary means all other parts develop below the ovary. Such cases are observed in plants like mustard, china rose and brinjal.

Topic: Biology, Morphology of Flowering Plants, NEET
Superovulation and embryo transplantation techniques are being used for improving

Options:
A the quality of milk in various breeds of cows.
B the quality of meat in various breeds of bull.
C breeds of rabbits and sheep.
D All of these

The correct answer is:
All of these

Solution:
Superovulation and embryo transplantation technology has been demonstrated for cattle, sheep, rabbits, buffaloes, mares, etc. High milk-yielding breeds of females and high quality (lean meat with less lipid) meat-yielding bulls have been bred successfully to increase herd size in a short time.

Topic: Biology, Strategies for Enhancement in Food Production, NEET
Suppose a beam of electrons with each electron having energy E0 is incident on a metal surface kept in an evacuated chamber. Then

Options:
A electrons can be emitted with any energy with maximum of E0
B no electrons will be emitted as only photons of emit electrons
C no electrons can be emitted but all with an energy
D electrons can be emitted with any energy will maximum of E0-ϕ being work function

The correct answer is:
electrons can be emitted with any energy with maximum of E0

Solution:
The emitted electrons may lie near the surface and so can have a maximum amount of energy E0 . If they are from deep inside, then energy is less than E0 .

Topic: Physics, Atomic Physics, NEET
Suppose ideal gas equation follows VP3= constant. Initial temperature and volume of the gas are T and V respectively. If gas expand to 27 V then its temperature will become

Options:
A T
B 9T
C 27T
D T9

The correct answer is:
9T

Solution:
VP3= constant,
as P=nRTV
â´VT3V3 = constant
âT3âV2
T′T3=27VV2
T′=9T

Topic: Physics, Thermodynamics, NEET
Suppose that gold is being plated on to another metal in an electrolytic cell. The half-cell reaction producing the Au(s) is AuCl4- +3e-âAus+4Cl- . If a 0.30 A current runs for 15.00 minute, what mass of Au(s) will be plated, assume all the electrons are used in the reduction of AuCl4- ? The Faraday constant is 96485 C/mol and molar mass of Au is 197.

Options:
A 0.184 g
B 0.551 g
C 1.84 g
D 0.613 g

The correct answer is:
0.184 g

Solution:
Mass of Au deposited = Number of Faraday passed Ã Eq. mass
=0.30Ã15Ã6096485Ã1973=0.184 g

Topic: Chemistry, Electrochemistry, NEET
Suppose that the a system consisting of two charges 7 mC and –2 mC (and with no external field) placed at (–9 cm, 0, 0) and (9 cm, 0, 0) respectively is now placed in an external electric field E = A (1/${{r}^{2}}$ ); A = 9 × ${{10}^{5}}$ N${{C}^{-1}}{{m}^{2}}$. What would the electrostatic energy of the configuration be

Options:
A 47.2J
B 35.1J
C 49.3J
D 53.9J

The correct answer is:
49.3J

Solution:
Correct Option is : (C)
49.3J

Topic: Chemistry, Capacitance, NEET
Suppose the charge of a proton and an electron differ slightly. One of them is e, the other is e+Δe. If the net electrostatic force and gravitational force between two hydrogen atoms placed at a distance d (much greater than atomic size) apart is zero, then Δe is of the order of [Given mass of hydrogen mh= 1.67×10–27 kg]

Options:
A 10-20 C
B 10-23 C
C 10-37Â C
D 10-47 C

The correct answer is:
10-37 C

Solution:
The net electrostatic force and gravitational force will be equal since the net force on the system is zero. Thus, FE=Fg
14πε0 Δe2d2=Gm2d2
9×109Δe2=6.67×10-11×1.67×10-27×1.67×10-27
Δe2=6.67×1.67×1.679×10-74
Δe ≈10-37

Topic: Physics, Electrostatics, NEET, NEET 2017
Suppose the elements X and Y combine to form two compounds XY2 and X3Y2. When 0.1 mole of XY2 weighs 10 g and 0.05 mole of X3Y2 weighs 9 g, the atomic weights of X and Y are

Options:
A 40, 30
B 60, 40
C 20, 30
D 30, 20

The correct answer is:
40, 30

Solution:
For XY2,
∵0.1 mole of XY2=10 g
∴1 mole of XY2=100 g
and X+2Y=100 ...(i)
For X3Y2,
∵0.05 mole of X3Y2=9 g
∴1 mole of X3Y2=180 g
and 3 X + 2 Y = 1 8 0 ...(ii)
On solving,
X= 40
and Y=30.

Topic: Chemistry, Some Basic Concepts of Chemistry, NEET, NEET 2016 (Phase 2)
Suppose the gene of interest is inserted at PstI site in pBR322, the resulting plasmid will confer resistance to:

Options:
A Ampicillin
B Penicillin
C Ampicillin and tetracycline
D Tetracycline

The correct answer is:
Tetracycline

Solution:
The ligation of alien DNA can be carried out at a restriction site present in one of the two antibiotic resistance genes in pBR322. For example, you can ligate a foreign DNA at the PstI site of the ampicillin resistance gene in the vector pBR322. The recombinant plasmids will lose ampicillin resistance due to insertion of foreign DNA and vice versa.

Topic: Biology, Biotechnology - Principles and Processes, NEET
Suppose the gravitational force varies inversely as the nth power of distance, then the time period of a planet in a circular orbit of radius r around the Sun will be proportional to

Options:
A r 1 2 n + 1
B r 1 2 n - 1
C r n
D r 1 2 n - 2

The correct answer is:
r 1 2 n + 1

Solution:
Given F= k r n
Now F= m v 2 r (centerialpetal force) =m Ï 2 r
â k r n =m ( 2Ï T ) 2 r
T 2 â r n+1
Tâ r n+1 2

Topic: Physics, Gravitation, NEET
Suppose the gravitational force varies inversely as the nth power of distance. Then the time period of a planet in a circular orbit of radius R around the sun will be proportional to

Options:
A Rn+12
B Rn-12
C Rn
D Rn-22

The correct answer is:
Rn+12

Solution:
The necessary centripetal force required for a planet to move round the sun = gravitational force exerted on it
i.e. mv2R=GMemRn
v2=GMeRn-1 ω = 2 π T
v=ωR
2λT=ω=vR=GMeRn-11R
T=12λRn+1GMe
=12λRn+12GMe

Topic: Physics, Gravitation, NEET
Suppose the value of the equilibrium constant for the given reaction H2(g)+I2(g)â2HI(g) at 717 K is 64, then calculate the same (eq. const.) for the reaction HI â 12H2 + 12I2.

Options:
A 64
B 8
C 1 64
D 1 8

The correct answer is:
1 8

Solution:
As the reaction is reversed and divided by 2,

the new equilibrium constant will be :

K'C =1KC

=164=18

Topic: Chemistry, Chemical Equilibrium, NEET
Suppose there existed a planet that went around the Sun twice as fast as the Earth. What would be its orbital size as compared to that of the Earth?

Options:
A 0.63
B 1.63
C 1.22
D 0.22

The correct answer is:
0.63

Solution:
Correct Option is : (A)
0.63

Topic: Chemistry, Gravitation, NEET
Suppose, we think of fission of a $Fe_{56}^{26}$nucleus into two equal fragments,$Al_{13}^{28}$ . What is the Q value of the process?

Options:
A 13.6 MeV
B 26.9 MeV
C 24.8 MeV
D 19.77 Mev

The correct answer is:
26.9 MeV

Solution:
Correct Option is : (B)
26.9 MeV

Topic: Chemistry, Nuclear Physics, NEET
Suppose while sitting in a parked car, you notice a jogger approaching towards you in the side view mirror of R = 2 m. If the jogger is running at a speed of 5 m s–1, how fast the image of the jogger appear to move when the jogger is 19 m

Options:
A 1/180 m/s
B 1/300 m/s
C 1/90 m/s
D 1/560 m/s

The correct answer is:
1/90 m/s

Solution:
Correct Option is : (C)
1/90 m/s

Topic: Chemistry, Ray Optics, NEET
Suppose while sitting in a parked car, you notice a jogger approaching towards you in the side view mirror of R = 2 m. If the jogger is running at a speed of 5 m s–1, how fast the image of the jogger appear to move when the jogger is 9 m

Options:
A 1/10 m/s
B 1/30 m/s
C 1/90 m/s
D 1/50 m/s

The correct answer is:
1/10 m/s

Solution:
Correct Option is : (A)
1/10 m/s

Topic: Chemistry, Ray Optics, NEET
Suppose while sitting in a parked car, you notice a jogger approaching towards you in the side view mirror of R = 2 m. If the jogger is running at a speed of 5 m s–1, how fast the image of the jogger appear to move when the jogger is 39 m

Options:
A 1/140 m/s
B 1/280 m/s
C 1/420 m/s
D 1/560 m/s

The correct answer is:
1/280 m/s

Solution:
Correct Option is : (B)
1/280 m/s

Topic: Chemistry, Ray Optics, NEET
Suppose while sitting in a parked car, you notice a jogger approaching towards you in the side view mirror of R = 2 m. If the jogger is running at a speed of 5 m s–1, how fast the image of the jogger appear to move when the jogger is 29 m

Options:
A 1/150 m/s
B 1/300 m/s
C 1/420 m/s
D 1/560 m/s

The correct answer is:
1/150 m/s

Solution:
Correct Option is : (A)
1/150 m/s

Topic: Chemistry, Ray Optics, NEET
Surbhi need to convert acetic acid to ethanol for experimental purpose, which of the following reagents should be employed?

Options:
A Na+ alcohol
B LiAlH4 + ether
C H2+Pt
D Sn+HCl

The correct answer is:
LiAlH4 + ether

Solution:
LiAlH4 + Ether is a reducing agent.
It reduces all types of carboxylic acids. So this reagent can be used to convert acetic acid into ethanol.

Topic: Chemistry, Carboxylic Acid Derivatives, NEET