datavorous/entrance-exam-dataset huggingface dataset:
CH3−CH=CH2+NOCl→P; Identify the adduct.

Options:
A
B
C
D

The correct answer is:

Solution:
NOCl undergo electrophilic addition on alkene as:

Topic: Chemistry, Hydrocarbons, NEET
CH3CH=CH-CH=CH-CH2CHOHCH3
How many isomers (geometrical and optical) are possible for the above-mentioned compound?

Options:
A 2
B 4
C 6
D 8

The correct answer is:
8

Solution:
The given compound has two double bonds and the presence of different terminal groups.

The number of geometrical isomers =2n

where n= number of double bonds.

Therefore total geometrical isomers =22=4

Hence has four geometrical isomers, i.e., E,E , E,Z , Z,E and Z,Z.

The compound has also one chiral carbon atom. Therefore, each of the four geometrical isomers will exist as a pair of enantiomers. Thus, in all there are eight stereoisomers.

Topic: Chemistry, General Organic Chemistry, NEET
$\mathrm{CH}_3-\mathrm{CHCl}-\mathrm{CH}_2-\mathrm{CH}_3$ has a chiral centre. Which one of the following represents its R-configuration?

Options:
A

B

C

D

The correct answer is:

Solution:
R-configuration indicates that a clockwise circular arrow goes from higher priority to lower priority and that lowest-priority substituent is in the back.
Related Theory
A counterclockwise direction is an $S$ (sinister, Latin for left) configuration. A clockwise direction is an $R$ (rectus, Latin for right) configuration.

Topic: Chemistry, General Organic Chemistry, NEET, NEET 2007
$\mathrm{CH}_3 \mathrm{CHO}$ and $\mathrm{C}_6 \mathrm{H}_5 \mathrm{CH}_2 \mathrm{CHO}$ can be distinguished chemically by

Options:
A Benedict test
B Iodoform test
C Tollen's reagent test
D Fehling solution test

The correct answer is:
Iodoform test

Solution:
$\mathrm{CH}_3 \mathrm{CHO}$ and $\mathrm{C}_6 \mathrm{H}_5 \mathrm{CH}_2 \mathrm{CHO}$ both being aliphatic aldehydes react with Tollen's reagent, Fehling solution and Benedict solution. So, these reagents cannot be used to distinguish them. $\mathrm{CH}_3 \mathrm{CHO}$ reacts with $\mathrm{NaOH}$ and $\mathrm{I}_2$ to give yellow crystals of iodoform while $\mathrm{C}_6 \mathrm{H}_5 \mathrm{CH}_2 \mathrm{CHO}$ does not react with it.
$\begin{aligned}
\mathrm{CH}_3 \mathrm{CHO}+3 \mathrm{I}_2+ & 4 \mathrm{NaOH} \longrightarrow \mathrm{CHI}_3 +\mathrm{HCOONa}+3 \mathrm{NaI}+3 \mathrm{H}_2 \mathrm{O} \\
\mathrm{C}_6 \mathrm{H}_5 \mathrm{CH}_2 \mathrm{CHO}+\mathrm{I}_2 & +\mathrm{NaOH} \longrightarrow \text {No reaction }
\end{aligned}$
Thus, $\mathrm{CH}_3 \mathrm{CHO}$ and $\mathrm{C}_6 \mathrm{H}_5 \mathrm{CH}_2 \mathrm{CHO}$ can be distinguished by iodoform test.

Topic: Chemistry, Aldehydes and Ketones, NEET, NEET 2012 (Screening)
CH 3 COCH 2 CH 2 CH 2COOH â NaBH 4 ââ â H 2 O A

The compound A would be:

Options:
A
B
C
D

The correct answer is:

Solution:

Topic: Chemistry, Carboxylic Acid Derivatives, NEET
CH 3 COOH → Br 2 / P (Y) → (ii) H 3 O + (i) KCN (X)

Here (X) is:

Options:
A Glycollic acid
B α -Hydroxypropionic acid
C Succinic acid
D Malonic acid

The correct answer is:
Malonic acid

Solution:
CH 3 α COOH → Br 2 / P H.V.Z BrCH 2 COOH → H 3 O ⊕ KCN HOOC - CH 2 - COOH Y X Malonic acid

Topic: Chemistry, Carboxylic Acid Derivatives, NEET
CH 3 NH 2 0.12 mole, pK b =3.3 is added to 0.08 moles of HCl and the solution is diluted to one litre, resulting pH of solution is:

Options:
A 10.7
B 3.6
C 10.4
D 11.3

The correct answer is:
10.4

Solution:
pOH=pKb+logCH3NH3+CH3NH2
=3.3+log0.080.04=3.6
∴pH=10.4

Topic: Chemistry, Ionic Equilibrium, NEET
Chain isomers of C7H16 is :

Options:
A 3
B 4
C 9
D 8

The correct answer is:
4

Solution:
i.e. 7.0, 6.1, 5.2, & 4.3 (chain lengths)

Topic: Chemistry, General Organic Chemistry, NEET
Change in the sequence of nucleotide in DNA is called as:

Options:
A mutagen
B mutation
C recombination
D translation

The correct answer is:
mutation

Solution:
A mutation is a change in a DNA sequence. Mutations can result from DNA copying mistakes made during cell division, exposure to ionizing radiation, exposure to chemicals called mutagens, or infection by viruses.
Related Theory:-
Chromosome mutation is the process of change that results in rearranged chromosome parts, abnormal numbers of individual chromosomes, or abnormal numbers of chromosome sets.

Topic: Biology, Principles of Inheritance and Variation, NEET, NEET 2002
Changes in GnRH pulse frequency in females is controlled by circulating levels of:

Options:
A Estrogen and progesterone
B Estrogen and inhibin
C Progesterone only
D Progesterone and inhibin

The correct answer is:
Estrogen and progesterone

Solution:
GnRH pulse frequency in females is usually controlled by estrogen and progesterone both after puberty. Inside the female body, GnRH pulse characteristic varies over a range that depends on the timing of the menstrula cycle with more frequent and lower amplitude pulses during the follicular phase of the cycle.

Topic: Biology, Human Reproduction, NEET, NEET 2016 (Phase 1)
Characteristic of fossilised life forms are:

Options:
A Hard body surface
B Extreme complex structures
C Intact organic materials
D All are found in non deformed state

The correct answer is:
Hard body surface

Solution:
Fossilised organisms hard body surface which allowed them to get preserved and fossilised.

Topic: Biology, Evolution, NEET
Characteristic of smooth muscle fibres are

Options:
A Spindle-shaped, unbranched, unstriated, uninucleate and involuntary
B Spindle-shaped, unbranched, unstriped, multinucleate and involuntary
C Cylindrical, unbranched, unstriped, multinucleate and involuntary
D Cylindrical, unbranched, striated, multinucleate and involuntary

The correct answer is:
Spindle-shaped, unbranched, unstriated, uninucleate and involuntary

Solution:
Characteristics of smooth muscle fibres:

Cells range from 5 to 10 Î¼m in diameter and 30 to 200 Î¼m in length

Spindle-shaped

Single, centrally located nucleus.

Smooth muscle tissue occurs within almost every organ, forming sheets, bundles or sheaths around other tissues. Smooth muscle differs from both skeletal and cardiac muscle tissues in structure and function. Sarcomeres or myofibrils are not present (therefore not striated, i.e., smooth).

Topic: Biology, Structural Organisation in Animals, NEET
Characterstics of crystalline solid are

Options:
A Long range order
B Disordered arrangement
C Short range order
D None of these

The correct answer is:
Long range order

Solution:
Crystalline solids are having long range order and have regular arrangement of constituent particles, sharp melting points and are anisotropic.

Topic: Chemistry, Solid State, NEET
Charge distribution in iodine monochloride is best represented as

Options:
A I+Cl-
B Iδ+Clδ-
C I-Cl+
D Iδ-Clδ+

The correct answer is:
Iδ+Clδ-

Solution:
Cl is more electronegative than I atom, therefore, Cl atom attains slight negative charge and I atom acquires slight positive charge.

Topic: Chemistry, p Block Elements (Group 15, 16, 17 & 18), NEET
Charges are placed at the corners of a square of side a as shown in the following figure. The charged particle placed at A is in equilibrium. The ratio q1q2 is

Options:
A 1
B 2
C 12
D 32

The correct answer is:
2

Solution:
The charge A experiences three forces F1, F2 and F3 as shown in the figure.
Now, F1=14ÏÎµ0 q1q2a2 (along AB)
F2=14ÏÎµ0 q1q2a2 (along AD)
F3=14ÏÎµ0 q12a2
The resultant of F1 and F2 should be equal and opposite to F3 to keep the system in equilibrium.
Resultant of F1 and F2=FR=F12+ F22
=14Ï q1q1Îµ0a22
For equilibrium,
14ÏÎµ0q1q2a22=14ÏÎµ0q12a2
q1q2=2

Topic: Physics, Electrostatics, NEET
Charges Q, 2Q and -Q are given to three concentric conducting spherical shells A, B and C respectively, as shown in the figure. The ratio of charges on the inner and outer surfaces of the shell C will be

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

The correct answer is:
- 3 2

Solution:
Due to induction of charge on surface facing each other will be equal and opposite.
Ratio = - 3 2

Topic: Physics, Electrostatics, NEET
Charges +q and -q are placed at A and B, respectively, which are at a distance 2L apart. If C is the midpoint between A and B, then work done in moving charge Q from C to D (through semicircular path CRD ) and from C to â are, respectively,

Options:
A qQ2πε0L and infinity
B qQ6πε0L and zero
C zero, zero
D -qQ6πε0L and zero

The correct answer is:
-qQ6πε0L and zero

Solution:
WCRD=QVD-VC
WCRD=QVD-0 ( ∵ potential at centre of dipole is zero)
WCRD=kq3L-kqLQ
WCRD=-kqQL×23=-qQ6πε0L

Topic: Physics, Electrostatics, NEET
Charges +q and –q are placed at A and B respectively which are at a distance 2L apart. If C is the midpoint between A and B then work done in moving Q from C to D (through semicircular path CRD ) and from C to ∞ are respectively

Options:
A qQ2πε0L and infinity
B qQ6πε0L and zero
C zero, zero
D -qQ6πε0L and zero

The correct answer is:
-qQ6πε0L and zero

Solution:
WCRD=QVD-VC
= QVD-0 ( potential at the centre of dipole is zero )
=kq3L-kqLQ
WCRD=-kqQL×23=-qQ6πε0L

Topic: Physics, Electrostatics, NEET
Charges $+q$ and $-q$ are placed at points $\mathrm{A}$ and $\mathrm{B}$ respectively which are a distance $2 L$ apart, $\mathrm{C}$ is the midpoint between $\mathrm{A}$ and $\mathrm{B}$. The work done in moving a charge $+\mathrm{Q}$ along the semicircle CRD is

Options:
A $\frac{q Q}{2 \pi \varepsilon_0 L}$
B $\frac{q Q}{6 \pi \varepsilon_0 L}$
C $\frac{q Q}{3 \pi \varepsilon_0 L}$
D $\frac{q Q}{4 \pi \varepsilon_0 L}$

The correct answer is:
$\frac{q Q}{3 \pi \varepsilon_0 L}$

Solution:
$W=\Delta U=\mathrm{Q}\left(V_D-V_C\right)$
where $V_c=0$
$=Q\left[\frac{q}{4 \pi \varepsilon_0(3 L)}-\frac{q}{4 \pi \varepsilon_0(L)} .0\right]$
$\frac{q Q}{3 \pi \varepsilon_0 L}$

Topic: Physics, Electrostatics, NEET, NEET 2007
CHCl 3  + MeCOMe → OH − A → excess KOH B → NaOH−CaO C → KOBr D

Options:
A MeCH2OH
B MeCOOH
C Me2CHOH
D CH2Cl2

The correct answer is:
MeCOOH

Solution:

Topic: Chemistry, Carboxylic Acid Derivatives, NEET
Check up the only correct statement in the following

Options:
A a body has a constant velocity and still it can have a varying speed
B a body has a constant speed but it can have a varying velocity
C a body having constant speed cannot have any acceleration
D all of the above

The correct answer is:
a body has a constant speed but it can have a varying velocity

Solution:
If velocity is constant then speed must be constant while if speed is constant then direction may change and hence velocity may change.

Topic: Physics, Motion In One Dimension, NEET
Cheilosis occurs due to deficiency of

Options:
A Pyridoxamine
B Riboflavin
C Thiamine
D Nicotinamide

The correct answer is:
Riboflavin

Solution:
Cheilosis occurs due to deficiency of vitamin $B_2$ (Riboflavin)

Topic: Chemistry, Biomolecules, NEET, NEET 2023 (Manipur)
Chemically, auxin is

Options:
A Indole acetic acid
B Kinetin
C Diterpenes
D Amino purine

The correct answer is:
Indole acetic acid

Solution:
Auxin is indole-3 Acetic Acid. It is formed from amino acid tryptophan. Cytokinins are amino purine and also named as kinetin. Gibberellins are diterpenes.

Topic: Biology, Plant - Growth and Development, NEET
Chemically hormones are:

Options:
A biogenic amines only
B proteins, steroids and biogenic amines
C proteins only
D steroids only.

The correct answer is:
proteins, steroids and biogenic amines

Solution:
Chemically hormones are of different nature like biogenic amines (like thyroxine, adrenaline etc.), proteinaceous or polypeptide (like hypothalamic hormones etc.) and steroids (like sex hormones and adrenocorticoids).
Related Theory
Hormones are chemical messengers released by glands without ducts to perform various functions. They are chemically classified under four categories- proteins and peptides, steroids, amino acids derivatives, and fatty acid derivatives.

Topic: Biology, Chemical Coordination and Integration, NEET, NEET 2004
Chemically hormones are

Options:
A Biogenic amines only
B Proteins, steroids and biogenic amines
C Proteins only
D Steroids only

The correct answer is:
Proteins, steroids and biogenic amines

Solution:
Hormones are chemical messengers formed by endocrine cells. Chemically hormones are of the following types: Amines-composed of amino group e.g., Melatonin.
Amino acids - e.g. Thyroxine
Peptides - e.g. Insulin
Steroids - e.g. Aldosterone

Topic: Biology, Chemical Coordination and Integration, NEET
Chemically, insulin is a

Options:
A lipo-soluble hormone.
B steroid hormone.
C peptide hormone.
D amino-derived hormone.

The correct answer is:
peptide hormone.

Solution:
Insulin is a hormone produced by beta cells of islets of Langerhans. Water soluble hormones are protein in nature and they bind to extracellular receptors and this is seen in insulin too. Hence insulin is proteinaceous in nature. Proinsulin has three polypeptide chains while mature insulin has two polypeptide chains.

Topic: Biology, Chemical Coordination and Integration, NEET
Chemicals are added to food

Options:
A For their preservation
B Enhancing their appeal
C Adding nutritive value in them
D All the above

The correct answer is:
All the above

Solution:
Chemicals are added to food for their preservation by using salt’s and sugar. For enhancing their appeal and adding nutritive value in them.

Topic: Chemistry, Chemistry in Everyday Life, NEET
Chemicals that are responsible for communication of message between neurons and muscules are known as

Options:
A messengers
B allogens
C antagonists
D receptors

The correct answer is:
messengers

Solution:
Chemicals that are responsible for communication of message between neurons and muscules are known as messengers. Messengers are chemical substances that are responsible for communication of messages between neurons and muscles.

Topic: Chemistry, Biomolecules, NEET
Chemicals which are released at the synaptic junction are called

Options:
A Hormones
B Neurotransmitters
C Cerebrospinal fluid
D Lymph

The correct answer is:
Neurotransmitters

Solution:
Neurotransmitters are chemicals which are released at the synaptic junction.

Topic: Biology, Neural Control and Coordination, NEET
Chemiosmotic theory of ATP synthesis in chloroplast & mitochondria is based on

Options:
A membrane potential.
B proton gradient.
C accumulation of Na+.
D accumulation of K+.

The correct answer is:
proton gradient.

Solution:
Peter Mitchell, a British biochemist, in 1961 proposed the Chemiosmotic theory where he states that the protons pumped out due to the action of the electron transport system in to the intermembrane space of mitochondria generates an electrochemical gradient. The gradient of protons causes higher pH value in the internal matrix of mitochondria and lower pH value in the intermembrane space and when the protons flow back in, energy is dissipated which helps in synthesis of ATP by the ATP synthase.
Such proton gradient also develops in the chloroplast at the lumen of thylakoid and stroma. This occurs due to the photolysis of water releasing protons and movement of protons from stroma to thylakoid due to the action of NADP reductase enzyme. There is low pH value in thylakoid lumen and high pH value in stroma and the flow of proton due to the gradient again results in formation of ATP.

Topic: Biology, Photosynthesis in Higher Plants, NEET
Chemiosmotic theory of ATP synthesis in the chloroplasts and mitochondria is based on:

Options:
A membrane potential
B accumulation of $\mathrm{Na}$ ions
C accumulation of $\mathrm{K}$ ions
D proton gradient.

The correct answer is:
proton gradient.

Solution:
According to the chemiosmosis theory of ATP generation. The ATP is generated utilizing the electrochemical gradient generated due to the accumulation of protons in the thylakoid lumen of chloroplast or peri-mitochondrial space in mitochondria. The accumulation of protons gives rise to an electric gradient, due to the accumulation of positive charge and a chemical gradient due to the accumulation of hydrogen atom.
Related Theory
The chemiosmotic hypothesis stated that a proton-motive force was responsible for driving the synthesis of ATP. In this hypothesis, protons would be pumped across the inner mitochondrial membrane as electrons went through the electron transfer chain. This would result in a proton gradient with a lower $\mathrm{pH}$ in the intermembrane space and an elevated $\mathrm{pH}$ in the matrix of the mitochondria. An intact inner mitochondrial membrane, impermeable to protons, is a requirement of such a model. The proton gradient and membrane potential are the proton-motive force that is used to drive ATP synthesis. In effect, the pH gradient acts as $a$ "battery" which stores energy to produce ATP.

Topic: Biology, Respiration in Plants, NEET, NEET 2005
Chemiosmotic theory of ATP synthesis in the chloroplasts and mitochondria is based on:

Options:
A Proton gradient
B Accumulation of K+ ions
C Accumulation of Na2+ ions
D Membrane potential

The correct answer is:
Proton gradient

Solution:
Chemiosmotic theory of ATP synthesis in the chloroplasts and mitochondria is based on proton gradient. Chemiosmosis is the movement of ions across a selectively permeable membrane, down their electrochemical gradient. More specifically, it relates to the generation of ATP by the movement of hydrogen ions across a membrane during cellular respiration or photosynthesis.

Topic: Biology, Cell - The Unit of Life, NEET
Options:
A
B
C
D

The correct answer is:

Solution:
Here the reaction is as follows

Topic: Chemistry, Alcohols Phenols and Ethers, NEET
Options:
A
B
C
D

The correct answer is:

Solution:
It is acid catalysed ring opening of epoxide in which nucleophile attack at more substituted carbon.

Topic: Chemistry, Alcohols Phenols and Ethers, NEET
Options:
A
B
C
D

The correct answer is:

Solution:
Ammoniacal silver nitrate solution is Tollens’ reagent. Tollens’ reagent can be used to distinguish aldehyde & ketone as aldehyde upon warming with Tollens’ reagent produces a silver mirror due to formation of silver metal in alkaline medium. Aldehyde is oxidised to corresponding carboxylate anion.

Topic: Chemistry, Aldehydes and Ketones, NEET, NEET 2023 (All India)
Options:
A
B
C
D

The correct answer is:

Solution:
It is clemmensen reduction of carbonyl group in acidic medium, thus other acid sensitive group( like -OH here) also gets affected by acidic medium(changed to Cl ).

Topic: Chemistry, Aldehydes and Ketones, NEET
Options:
A
B
C
D none of these

The correct answer is:

Solution:
Here phenol is formed as follows

Topic: Chemistry, Amines, NEET
Options:
A
B
C Both are correct
D None of these

The correct answer is:

Solution:
The four membered cyclic ester give reaction with alcohol and undergo trans esterification, gives linear non cyclic ester.

Topic: Chemistry, Carboxylic Acid Derivatives, NEET
Options:
A -0.52V
B 0.52V
C 0.76V
D -0.76V

The correct answer is:
0.52V

Solution:
Correct Option is : (B)
0.52V

Topic: Chemistry, Electrochemistry, NEET
Options:
A 0.22V
B 0.44V
C -0.22V
D -0.44V

The correct answer is:
0.22V

Solution:
Correct Option is : (A)
0.22V

Topic: Chemistry, Electrochemistry, NEET
Options:
A

B

C

D

The correct answer is:

Solution:
Correct Option is : (C)

Topic: Chemistry, Electrochemistry, NEET
Options:
A

B

C

D

The correct answer is:

Solution:
Correct Option is : (B)

Topic: Chemistry, Electrochemistry, NEET
Options:
A

B

C

D

The correct answer is:

Solution:
Correct Option is : (A)

Topic: Chemistry, Electrochemistry, NEET
Options:
A 1.05 x 107
B 9.616 x 107
C 0.65 x 105
D 1.25 x 107

The correct answer is:
9.616 x 107

Solution:
Correct Option is : (B)
9.616 x 107

Topic: Chemistry, Electrochemistry, NEET
Options:
A 3.17V
B 2.14V
C 3.43V
D 2.96V

The correct answer is:
2.96V

Solution:
Correct Option is : (D)
2.96V

Topic: Chemistry, Electrochemistry, NEET
Options:
A 3.92 X 1015
B 4.46 X 1015
C 5.32 X 1015
D 6.28 X1015

The correct answer is:
3.92 X 1015

Solution:
Correct Option is : (A)
3.92 X 1015

Topic: Chemistry, Electrochemistry, NEET
Options:
A 182 kJmol-1
B 212 kJmol-1
C 232 kJmol-1
D 262 kJmol-1

The correct answer is:
212 kJmol-1

Solution:
Correct Option is : (B)
212 kJmol-1

Topic: Chemistry, Electrochemistry, NEET
Options:
A 0.124 X 10-2Sc m-1
B 0.248 X 10-2Sc m-1
C 0.372 X 10-2Sc m-1
D 0.496 X 10-2Sc m-1

The correct answer is:
0.248 X 10-2Sc m-1

Solution:
Correct Option is : (B)
0.248 X 10-2Sc m-1

Topic: Chemistry, Electrochemistry, NEET
Options:
A 190 Ω cm
B 87 S m-1, 230 Scm-2mol-1
C 87 Ω cm, 230 S cm-2mol-1
D 190 S m-1, 23 S cm-2mol-1

The correct answer is:
87 Ω cm, 230 S cm-2mol-1

Solution:
Correct Option is : (C)
87 Ω cm, 230 S cm-2mol-1

Topic: Chemistry, Electrochemistry, NEET
Options:
A 263
B 264
C 265
D 266

The correct answer is:
266

Solution:
Correct Option is : (D)
266

Topic: Chemistry, Electrochemistry, NEET
Options:
A 390.5
B 388
C 390
D 395

The correct answer is:
390.5

Solution:
Correct Option is : (A)
390.5

Topic: Chemistry, Electrochemistry, NEET
Options:
A 1.78 × 10-5mol L-1
B 1.58 × 10-5mol L-1
C 1.28 × 10-5mol L-1
D 1.18 × 10-5mol L-1

The correct answer is:
1.78 × 10-5mol L-1

Solution:
Correct Option is : (A)
1.78 × 10-5mol L-1

Topic: Chemistry, Electrochemistry, NEET
Options:
A $\frac{{{\mu }_{o}}l\lambda }{\pi R}ln\frac{x}{{{x}_{o}}}$
B $\frac{{{\mu }_{o}}l\lambda }{2\pi R}ln\frac{x}{{{x}_{o}}}$
C $\frac{2{{\mu }_{o}}l\lambda }{2\pi R}ln\frac{x}{{{x}_{o}}}$
D $\frac{{{\mu }_{o}}l\lambda }{2\pi R}ln\frac{2x}{{{x}_{o}}}$

The correct answer is:
$\frac{{{\mu }_{o}}l\lambda }{2\pi R}ln\frac{x}{{{x}_{o}}}$

Solution:
Correct Option is : (B)
$\frac{{{\mu }_{o}}l\lambda }{2\pi R}ln\frac{x}{{{x}_{o}}}$

Topic: Chemistry, Electromagnetic Induction, NEET
Options:
A R
B S
C E
D Z

The correct answer is:
R

Solution:
Lowest prority atom is always away from the viewer. Prority is seen on the basis of atomic no. and if atomic no. are same then on the basis of atomic mass.
See in the order of higher to lower priority.
If clockwise then it is R.
If anticlockwise then it is S.
Full name of the molecule is
(R) 1-bromo-1-chloroethane.

Topic: Chemistry, General Organic Chemistry, NEET
Options:
A Diastereomers
B Enantiomers
C Tautomers
D Conformers

The correct answer is:
Diastereomers

Solution:
They are not super impossible and not mirror image of each other so called diastereomers.

Topic: Chemistry, General Organic Chemistry, NEET
Options:
A
B
C
D

The correct answer is:

Solution:
Clemmensen reduction is a chemical reaction described as a reduction of ketones or aldehydes to alkanes using zinc amalgam and concentrated hydrochloric acid (HCl). In the given molecule the C=O part coverts to CH2 as shown below.

Topic: Chemistry, Hydrocarbons, NEET, NEET 2023 (All India)
Options:
A
B
C
D None of the above

The correct answer is:

Solution:
It is Friedel craft alkylation reaction, epoxide with BF3 produces carbocation which undergo electrophilic aromatic substitution at benzene.

Topic: Chemistry, Hydrocarbons, NEET
Options:
A
B
C
D

The correct answer is:

Solution:
this reaction occurs as follows

Topic: Chemistry, Hydrocarbons, NEET
Options:
A o-cresol
B p-cresol
C 2,4-dihydroxytoluene
D benzoic acid

The correct answer is:
benzoic acid

Solution:
Here Y is benzoic acid and formed as follows

Topic: Chemistry, Hydrocarbons, NEET
Options:
A X is an ester
B X is a ketone
C X is a vicinal diol
D X is a carboxylic acid.

The correct answer is:
X is an ester

Solution:
X is ester, & the reaction is acid catalysed hydration of alkyenes is

Topic: Chemistry, Hydrocarbons, NEET
Options:
A -35 kJ mol-1, 1.36 *10-6
B -35 kJ mol-1, 1.36 *10-7
C -45 kJ mol-1, 1.37 *10-6
D -55 kJ mol-1, 1.36 *10-6

The correct answer is:
-35 kJ mol-1, 1.36 *10-6

Solution:
Correct Option is : (A)
-35 kJ mol-1, 1.36 *10-6

Topic: Chemistry, Ionic Equilibrium, NEET
Chemolithotrophs are those bacteria which can utilize

Options:
A Inorganic material as the energy source
B Light as the energy source
C Organic compound as the electron source
D Crude oil as carbon source

The correct answer is:
Inorganic material as the energy source

Solution:
A chemolithotroph is an organism that is able to use inorganic reduced compounds as a source of energy. This mode of metabolism is known as chemolithotrophy. Other than chemolithotrophic the major autotrophic mode of nutrition is photoautotrophic.

Topic: Biology, Biological Classification, NEET