datavorous/entrance-exam-dataset huggingface dataset:
What is the electronic configuration of carbon in its ground state?

Options:
A [He] 2s2 2p2
B [He] 2s1 2px1 2py1 2pz1
C [He] 2s2 2px2 2py2 2pz2
D [He] 2s2 2py2 2pX2

The correct answer is:
[He] 2s2 2p2

Solution:
The electronic configuration of carbon in its ground state as [He]2s2 2p2.

Topic: Chemistry, Chemical Bonding and Molecular Structure, NEET
What is the electronic configuration of Ce4+?

Options:
A [Rn]
B [Xe]4f5
C [Xe]4f2
D [Xe]

The correct answer is:
[Xe]

Solution:
Correct Option is : (D)
[Xe]

Topic: Chemistry, d and f Block Elements, NEET
What is the electronic configuration of chlorine (Cl)?

Options:
A [Ne] 3s² 3p⁶
B [Xe] 4f¹⁴ 5d¹⁰ 6s² 6p⁶
C [Ar] 4s² 3d¹⁰ 4p⁶
D [Kr] 5s² 4d¹⁰ 5p⁶

The correct answer is:
[Ar] 4s² 3d¹⁰ 4p⁶

Solution:
The electronic configuration of chlorine (Cl) is [Ar] 4s² 3d¹⁰ 4p⁶.**

Topic: Chemistry, p Block Elements (Group 15, 16, 17 & 18), NEET
What is the electronic configuration of Co2+?

Options:
A [Ar]3d54s2
B [Ar]3d8
C [Ar]3d7
D [Ar]3d24s2

The correct answer is:
[Ar]3d7

Solution:
Correct Option is : (C)
[Ar]3d7

Topic: Chemistry, d and f Block Elements, NEET
What is the electronic configuration of Cr3+?

Options:
A [Ar]3d1
B [Ar]3d24s1
C [Ar]3d04s2
D [Ar]3d3

The correct answer is:
[Ar]3d3

Solution:
Correct Option is : (D)
[Ar]3d3

Topic: Chemistry, d and f Block Elements, NEET
What is the electronic configuration of Cr in the 3d series?

Options:
A 3d44s2
B 3d54s1
C 3d104s1
D 3d94s2

The correct answer is:
3d54s1

Solution:
The electronic configuration of Cr in the 3d series is 3d54s1.

Topic: Chemistry, d and f Block Elements, NEET
What is the electronic configuration of Cu+?

Options:
A [Ar]3d10
B [Ar]3d8
C [Ar]3d54s2
D [Ar]3d94s1

The correct answer is:
[Ar]3d10

Solution:
Correct Option is : (A)
[Ar]3d10

Topic: Chemistry, d and f Block Elements, NEET
What is the electronic configuration of hydrogen?

Options:
A 1s1
B 2s2
C 2s2 2p2
D 1s2

The correct answer is:
1s1

Solution:
The electronic configuration of hydrogen is mentioned as 1s1 in the paragraph.

Topic: Chemistry, Hydrogen, NEET
What is the electronic configuration of livermorium (Lv)?

Options:
A [Rn] 5f14 6d10 7s2 7p4
B [Rn] 5f14 4d10 6s2 6p4
C [Rn] 4f14 5d10 6s2 6p4
D [Rn] 5f14 6d10 7s2 7p3

The correct answer is:
[Rn] 5f14 6d10 7s2 7p4

Solution:
The paragraph provides the electronic configuration of livermorium as [Rn] 5f14 6d10 7s2 7p4.

Topic: Chemistry, p Block Elements (Group 15, 16, 17 & 18), NEET
What is the electronic configuration of Lu2+?

Options:
A [Xe]4f105d5
B [Xe]4f145d1
C [Xe]4f135d2
D [Xe]4f145d2

The correct answer is:
[Xe]4f145d1

Solution:
Correct Option is : (B)
[Xe]4f145d1

Topic: Chemistry, d and f Block Elements, NEET
What is the electronic configuration of Mn2+?

Options:
A [Ar]3d4
B [Ar]3d5
C [Ar]3d6
D [Ar]3d8

The correct answer is:
[Ar]3d5

Solution:
Correct Option is : (B)
[Ar]3d5

Topic: Chemistry, d and f Block Elements, NEET
What is the electronic configuration of moscovium?

Options:
A [Rn] 6d10 7s2
B [Xe] 5f146d107s27p3
C [Kr] 4d105s25p3
D [He] 2s2

The correct answer is:
[Xe] 5f146d107s27p3

Solution:
The paragraph provides the electronic configuration of moscovium as [Rn] 5f146d107s27p3.

Topic: Chemistry, p Block Elements (Group 15, 16, 17 & 18), NEET
What is the electronic configuration of Pm3+?

Options:
A [Xe]4f4
B [Xe]4f7
C [Xe]4f3
D [Xe]4f5

The correct answer is:
[Xe]4f4

Solution:
Correct Option is : (A)
[Xe]4f4

Topic: Chemistry, d and f Block Elements, NEET
What is the electronic configuration of tennessine (Ts)?

Options:
A [Ne] 3s² 3p⁶
B [Xe] 4f¹⁴ 5d¹⁰ 6s² 6p⁶
C [Rn] 5f¹⁴ 6d¹⁰ 7s² 7p⁵
D [Kr] 5s² 4d¹⁰ 5p⁶

The correct answer is:
[Rn] 5f¹⁴ 6d¹⁰ 7s² 7p⁵

Solution:
The electronic configuration of tennessine (Ts) is [Rn] 5f¹⁴ 6d¹⁰ 7s² 7p⁵.

Topic: Chemistry, p Block Elements (Group 15, 16, 17 & 18), NEET
What is the electronic configuration of Th4+?

Options:
A [Rn]5f3
B [Ar]
C [Rn]
D [Rn]5f4

The correct answer is:
[Rn]

Solution:
Correct Option is : (C)
[Rn]

Topic: Chemistry, d and f Block Elements, NEET
What is the electronic configuration of the ground state of Be?

Options:
A 1s22s1
B 1s22s2
C 1s22p1
D 1s22p2

The correct answer is:
1s22s2

Solution:
The ground state electronic configuration of Be is 1s22s2.

Topic: Chemistry, Chemical Bonding and Molecular Structure, NEET
What is the electron-rich nature of ortho and para positions in phenols attributed to?

Options:
A The inductive effect of the -OH group
B The withdrawal of electrons by the -OH group
C The resonance effect caused by the -OH group
D The steric hindrance around the -OH group

The correct answer is:
The resonance effect caused by the -OH group

Solution:
The electron-rich nature of ortho and para positions in phenols is due to the resonance effect caused by the -OH group.

Topic: Chemistry, Alcohols Phenols and Ethers, NEET
What is the electrostatic potential energy of a system with two charges, 7 mC and -2 mC, located at (-9 cm, 0, 0) and (9 cm, 0, 0), respectively, in the absence of an external field?

Options:
A -1.26 J
B 1.26 J
C -0.7 J
D 0.7 J

The correct answer is:
-0.7 J

Solution:
Correct Option is : (C)
-0.7 J

Topic: Chemistry, Capacitance, NEET
What is the elemental form of hydrogen?

Options:
A H+
B H2
C H-
D H3

The correct answer is:
H2

Solution:
The elemental form of hydrogen is H2, which exists as a diatomic molecule.

Topic: Chemistry, Hydrogen, NEET
What is the elevation of the boiling point of a solution?

Options:
A The difference between the boiling point of the pure solvent and the boiling point of the solution.
B The difference between the boiling point of the pure solvent and the boiling point of the solute.
C The boiling point of the solute.
D The boiling point of the solvent.

The correct answer is:
The difference between the boiling point of the pure solvent and the boiling point of the solution.

Solution:
The elevation of the boiling point is the difference between the boiling point of the pure solvent and the boiling point of the solution.

Topic: Chemistry, Solutions, NEET
What is the elongated slender part beneath the stigma called?

Options:
A Style
B Ovary
C Integument
D Hilum

The correct answer is:
Style

Solution:
The style is the elongated slender part beneath the stigma.

Topic: Biology, Sexual Reproduction in Flowering Plants, NEET
What is the elongation of a structural steel rod with a radius of 10 mm and a length of 1.0 m when subjected to a 100 kN force?(Young’s modulus, of structural steel is 2.0 × ${{10}^{11}}~N{{m}^{-2}}$ .)

Options:
A 1.26 mm
B 1.59 mm
C 3.36 mm
D 4.11 mm

The correct answer is:
1.59 mm

Solution:
Correct Option is : (B)
1.59 mm

Topic: Chemistry, Mechanical Properties of Solids, NEET
What is the elongation of the wire when a 14.5 kg mass, fastened to the end of a steel wire of unstretched length 1.0 m, is whirled in a vertical circle with an angular velocity of 2 rev/s at the bottom of the circle, given that the cross-sectional area of the wire is 0.065 cm²?

Options:
A $1.87~\times ~{{10}^{-3}}m$
B $1.87~\times ~{{10}^{-4}}m$
C $1.87~\times ~{{10}^{-5}}m$
D $1.87~\times ~{{10}^{-2}}m$

The correct answer is:
$1.87~\times ~{{10}^{-3}}m$

Solution:
Correct Option is : (A)
$1.87~\times ~{{10}^{-3}}m$

Topic: Chemistry, Mechanical Properties of Solids, NEET
What is the emergent speed of the bullet when a police officer fires a 50.0 g bullet with an initial speed of 200 m/s (see Table 5.2) into soft plywood with a thickness of 2.00 cm, and the bullet emerges with only 10% of its initial kinetic energy?

Options:
A 50 m/s
B 63.2 m/s
C 126.4 m/s
D 31.6 m/s

The correct answer is:
63.2 m/s

Solution:
Correct Option is : (B)
63.2 m/s

Topic: Chemistry, Work Power Energy, NEET
What is the emf developed across the cut of a rectangular wire loop, with sides 8 cm and 2 cm, moving out of a region of uniform magnetic field with a magnitude of 0.3 T directed normal to the loop, when the velocity of the loop is 1 cm s⁻¹ in a direction normal to the longer side?

Options:
A 3.0 × 10⁻³ V
B 2.4 × 10⁻⁴ V
C 1.2 × 10⁻³ V
D 4.8 × 10⁻⁴ V

The correct answer is:
2.4 × 10⁻⁴ V

Solution:
Correct Option is : (B)
2.4 × 10⁻⁴ V

Topic: Chemistry, Electromagnetic Induction, NEET
What is the emf developed across the cut of a rectangular wire loop, with sides 8 cm and 2 cm, moving out of a region of uniform magnetic field with a magnitude of 0.3 T directed normal to the loop, when the velocity of the loop is 1 cm s⁻¹ in a direction normal to the shorter side?

Options:
A 3.0 × 10⁻³ V
B 0.6 × 10⁻⁴ V
C 1.2 × 10⁻³ V
D 4.8 × 10⁻⁴ V

The correct answer is:
0.6 × 10⁻⁴ V

Solution:
Correct Option is : (B)
0.6 × 10⁻⁴ V

Topic: Chemistry, Electromagnetic Induction, NEET
What is the emf developed between the center and the ring when a 1.0 m long metallic rod is rotated with an angular frequency of 400 rad s–1about an axis normal to the rod passing through its one end, while the other end of the rod is in contact with a circular metallic ring, and a constant and uniform magnetic field of 0.5 T parallel to the axis exists everywhere?

Options:
A 25 V
B 50 V
C 75 V
D 100 V

The correct answer is:
100 V

Solution:
Correct Option is : (D)
100 V

Topic: Chemistry, Electromagnetic Induction, NEET
What is the empirical formula of an oxide of iron, which has 69.9% iron and 30.1% dioxygen by mass?

Options:
A FeO
B Fe3O4
C Fe2O3
D Fe2O

The correct answer is:
Fe2O3

Solution:
Correct Option is : (C)
Fe2O3

Topic: Chemistry, Some Basic Concepts of Chemistry, NEET
What is the empirical formula of vanadium oxide if 2.74 g of metal oxide contains 1.53 g of metal?
Given: Take atomic mass of vanadium as 52 g/mol.

Options:
A V2O3
B VO
C V2O5
D VO2

The correct answer is:
V2O5

Solution:
% of V =1.532.74×100=55.83
So % of O=44.17

Element
%
Atomic ratio
Simplest ratio

V
55.83
55.8352=1.1
1.11.1=1

O
44.17
44.1716=2.76
2.761.1=2.5

V : O = 2: 5
Thus, empirical formula =V2O5

Topic: Chemistry, Some Basic Concepts of Chemistry, NEET
What is the end of the juvenile phase in higher plants?

Options:
A The end of the vegetative phase
B The beginning of the reproductive phase
C The end of the reproductive phase
D The beginning of the vegetative phase

The correct answer is:
The beginning of the reproductive phase

Solution:
The end of the juvenile phase in higher plants marks the beginning of the reproductive phase, which can easily be seen when the plants come to flower.

Topic: Biology, Reproduction in Organisms, NEET
What is the end of the reproductive phase considered as?

Options:
A One of the parameters of maturity
B One of the parameters of death
C One of the parameters of old age
D None of the above

The correct answer is:
One of the parameters of old age

Solution:
The end of the reproductive phase can be considered as one of the parameters of senescence or old age.

Topic: Biology, Reproduction in Organisms, NEET
What is the end product in the following sequence of reactions?

Options:
A Aniline
B Benzylamine
C Cyanobenzene
D Benzenediazonium chloride

The correct answer is:
Benzylamine

Solution:

Topic: Chemistry, Carboxylic Acid Derivatives, NEET
What is the end product in the following sequence of reactions?

Options:
A Aniline
B Phenol
C Benzene
D Benzenediazonium chloride

The correct answer is:
Aniline

Solution:

Topic: Chemistry, Carboxylic Acid Derivatives, NEET
What is the end product of glycolysis?

Options:
A Glucose
B Fructose
C Pyruvic acid
D Dihydroxyacetone phosphate

The correct answer is:
Pyruvic acid

Solution:
The end product of glycolysis is pyruvic acid, which is formed from glucose after a series of ten reactions under the control of different enzymes.

Topic: Biology, Respiration in Plants, NEET
What is the end product of the hydrolysis of starch under the specified conditions?

Options:
A Ethanol
B Glucose
C Sucrose
D Cellulose

The correct answer is:
Glucose

Solution:
The end product of the hydrolysis of starch under the specified conditions is glucose.

Topic: Chemistry, Biomolecules, NEET
What is the end product when the monohydrate form of sodium carbonate is heated above 373 K?

Options:
A Sodium Chloride
B Sodium Carbonate
C Sodium Hydroxide
D Sodium Bicarbonate

The correct answer is:
Sodium Carbonate

Solution:
When the monohydrate form of sodium carbonate is heated above 373 K, it becomes completely anhydrous and changes to a white powder known as soda ash, which is still sodium carbonate.

Topic: Chemistry, s Block Elements, NEET
What is the end result of the fertilization process in angiosperms?

Options:
A Development of the ovules into seeds
B Development of the ovaries into fruit
C Both A) and B)
D None of the above

The correct answer is:
Both A) and B)

Solution:
The fertilization process in angiosperms results in the development of both the ovules into seeds and the ovaries into fruit.

Topic: Biology, Plant Kingdom, NEET
What is the energy change (Δ) associated with the combustion of diborane in oxygen?

Options:
A 1976 kJ mol−1
B 180 kJ mol−1
C 273 kJ mol−1
D 373 kJ mol−1

The correct answer is:
1976 kJ mol−1

Solution:
The energy change (Δ) for the combustion of diborane in oxygen is 1976 kJ mol−1.

Topic: Chemistry, p Block Elements (Group 13 & 14), NEET
What is the energy currency of the cell?

Options:
A The energy released by oxidation in respiration
B The carbon skeleton produced during respiration
C ATP
D The energy contained in respiratory substrates

The correct answer is:
ATP

Solution:
ATP acts as the energy currency of the cell.

Topic: Biology, Respiration in Plants, NEET
What is the energy equivalent of 1 g of substance?

Options:
A 9 × 1010J
B 9 × 1011J
C 9 × 1012J
D 9 × 1013J

The correct answer is:
9 × 1013J

Solution:
Correct Option is : (D)
9 × 1013J

Topic: Chemistry, Nuclear Physics, NEET
What is the energy equivalent of one atomic mass unit, first in Joules and then in MeV, and using this value, what is the mass defect of $O_{8}^{16}$in MeVc2?

Options:
A 931.5 MeV,0.125 MeV/c2
B 931.5 MeV,127.5 MeV/c2
C 931.5 MeV,0.25 MeV/c2
D 938.5 MeV,127.5 MeV/c2

The correct answer is:
931.5 MeV,127.5 MeV/c2

Solution:
Correct Option is : (B)
931.5 MeV,127.5 MeV/c2

Topic: Chemistry, Nuclear Physics, NEET
What is the energy gap between the (n-1)d and ns orbitals in elements with exceptions to the general configuration?

Options:
A Large energy gap
B Moderate energy gap
C Small energy gap
D No energy gap

The correct answer is:
Small energy gap

Solution:
Exceptions occur due to the small energy difference between (n-1)d and ns orbitals.

Topic: Chemistry, d and f Block Elements, NEET
What is the energy, in electronvolts (eV), of a photon in different parts of the electromagnetic spectrum when using the formula E = hv?

Options:
A 1.24 × 10-6eV
B 1.24 × 103eV
C 1.24 × 109eV
D 1.24 × 1012eV

The correct answer is:
1.24 × 10-6eV

Solution:
Correct Option is : (A)
1.24 × 10-6eV

Topic: Chemistry, Electromagnetic Waves, NEET
What is the energy in ergs, required to shift the electron of the hydrogen atom from the first Bohr orbit to the fifth Bohr orbit and what is the wavelength of the light emitted when the electron returns to the ground state? The ground state electron energy is –2.18 × 10–11ergs

Options:
A 3.56 × 10–11ergs and 623 Å
B 2.08 × 10–11ergs and 950 Å
C 2.08 × 10–11ergs and 623 Å
D 3.56 × 10–11ergs and 950 Å

The correct answer is:
2.08 × 10–11ergs and 950 Å

Solution:
Correct Option is : (B)
2.08 × 10–11ergs and 950 Å

Topic: Chemistry, Structure of Atom, NEET
What is the energy level associated with a free electron, where its energy is taken as zero?

Options:
A n = 1
B n = 0
C n = ∞
D n = -1

The correct answer is:
n = ∞

Solution:
"The electron in this situation is associated with the stationary state of Principal Quantum number = n = ∞ and is called an ionized hydrogen atom."

Topic: Chemistry, Structure of Atom, NEET
What is the energy of a photon in a monochromatic light beam produced by a laser with a frequency of 6.0 × 1014Hz and an emitted power of 2.0 × 10-3W?

Options:
A 3.98 × 10-19J
B 4.67 × 10-19J
C 2.54 × 10-19J
D 1.23 × 10-19J

The correct answer is:
3.98 × 10-19J

Solution:
Correct Option is : (A)
3.98 × 10-19J

Topic: Chemistry, Dual Nature of Matter, NEET
What is the energy of each photon in the light beam produced by a helium-neon laser emitting monochromatic light with a wavelength of 632.8 nm and a power of 9.42 mW?

Options:
A 1.58 × 10–19J
B 2.36 × 10–19J
C 3.14 × 10–19J
D 4.72 × 10–19J

The correct answer is:
3.14 × 10–19J

Solution:
Correct Option is : (C)
3.14 × 10–19J

Topic: Chemistry, Dual Nature of Matter, NEET
What is the energy of one mole of photons of radiation whose frequency is 5 ×1014Hz?

Options:
A 225.31 kJ mol-1
B 339.21 kJ mol-1
C 564.23 kJ mol-1
D 199.51 kJ mol–1

The correct answer is:
199.51 kJ mol–1

Solution:
Correct Option is : (D)
199.51 kJ mol–1

Topic: Chemistry, Structure of Atom, NEET
What is the energy required for one molecule of water to evaporate, given the following data? Surface tension is exhibited by liquids due to force of attraction between molecules of the liquid. The surface tension decreases with an increase in temperature and vanishes at boiling point. Given that the latent heat of vaporisation for water (Lv) = 540 k cal kg–1, the mechanical equivalent of heat (J) = 4.2 J cal–1, density of water (ρw) = 103 kg l–1, Avogadro’s Number (NA) = 6.0 × 1026k mole–1, and the molecular weight of water (MA) = 18 kg for 1 k mole.

Options:
A 6.8 × 10–20J
B 5.4 × 10–19J
C 2.7 × 10–20J
D 3.6 × 10–21J

The correct answer is:
6.8 × 10–20J

Solution:
Correct Option is : (A)
6.8 × 10–20J

Topic: Chemistry, Mechanical Properties of Fluids, NEET
What is the energy required for the substrate to reach the transition state?

Options:
A The structural transformation
B Active site
C The activation energy
D The exothermic reaction

The correct answer is:
Active site

Solution:
The difference in average energy content between the substrate and the transition state is called activation energy. It is the energy required for the substrate to reach the transition state, where it undergoes structural transformation to form the product.

Topic: Biology, Biomolecules (B), NEET
What is the energy required to form the activated complex called?

Options:
A Potential energy
B Activation energy (Ea)
C Kinetic energy
D Reaction coordinate

The correct answer is:
Activation energy (Ea)

Solution:
The energy required to form the activated complex is known as activation energy (Ea).

Topic: Chemistry, Chemical Kinetics, NEET
What is the energy required to separate all the neutrons and protons in a 3.0 g coin made entirely of $Cu_{29}^{63}$ atoms (of mass 62.92960 u)?

Options:
A 2.535×1012J
B 3.214×1012J
C 4.651×1012J
D 5.123×1012J

The correct answer is:
2.535×1012J

Solution:
Correct Option is : (A)
2.535×1012J

Topic: Chemistry, Nuclear Physics, NEET
What is the energy requirement for active transport?

Options:
A It requires energy
B It doesn't require energy
C It's only required in certain circumstances
D It's not related to active transport

The correct answer is:
It requires energy

Solution:
Active transport occurs against the concentration gradient and hence requires energy. The energy is used to pump molecules or ions across a membrane, against the concentration gradient.

Topic: Biology, Digestion and Absorption, NEET
What is the energy separation symbolized by the term "Do" in crystal field theory for octahedral complexes?

Options:
A Energy gap
B Crystal splitting energy
C Ligand energy
D Coordination energy

The correct answer is:
Crystal splitting energy

Solution:
In crystal field theory for octahedral complexes, the energy separation is symbolized by "Do," representing crystal splitting energy.

Topic: Chemistry, Coordination Compounds, NEET
What is the energy source for the N₂-fixation process in plants?

Options:
A Photosynthesis
B Respiration of the host cells
C Nitrogen-fixing microbes
D Transpiration

The correct answer is:
Respiration of the host cells

Solution:
N₂-fixation is an energy-intensive process and requires ATP as energy. The ATP required is provided by the respiration of the host cells.

Topic: Biology, Mineral Nutrition, NEET
What is the energy that arises due to the motion of atoms or molecules in a body?

Options:
A Potential energy
B Electrical energy
C Thermal energy
D Chemical energy

The correct answer is:
Thermal energy

Solution:
Correct Option is : (C)
Thermal energy

Topic: Chemistry, States of Matter, NEET
What is the energy transferred by rain to each square meter of the surface at a place which receives 100 cm of rain in a year, considering the average mass of raindrops as 3.0 × 10-5kg and their average terminal velocity as 9 m s-1?

Options:
A 2.70 × 104J
B 3.60 × 104J
C 3.15 × 104J
D 4.05 × 104J

The correct answer is:
4.05 × 104J

Solution:
Correct Option is : (D)
4.05 × 104J

Topic: Chemistry, Work Power Energy, NEET
What is the energy trapped in ATP used for in organisms?

Options:
A Respiration
B Photosynthesis
C Biosynthesis of other molecules in the cell
D Various energy-requiring processes

The correct answer is:
Various energy-requiring processes

Solution:
The energy trapped in ATP is used for various energy-requiring processes in organisms.

Topic: Biology, Respiration in Plants, NEET
What is the energy used for in various energy-requiring processes of the organisms?

Options:
A The energy released by oxidation in respiration
B The carbon skeleton produced during respiration
C The energy trapped in ATP
D The energy contained in respiratory substrates

The correct answer is:
The energy trapped in ATP

Solution:
The energy trapped in ATP is used in various energy-requiring processes of the organisms.

Topic: Biology, Respiration in Plants, NEET
What is the energy utilized by the adult while jogging for 6 km, assuming there is no energy loss due to friction of the ground and air, and considering that an adult weighing 600N raises the center of gravity of his body by 0.25 m with each step of 1 m length in jogging?

Options:
A 9 × 106J
B 6 × 106J
C 3 × 106J
D 1.5 × 106J

The correct answer is:
9 × 106J

Solution:
Correct Option is : (A)
9 × 106J

Topic: Chemistry, Work Power Energy, NEET
What is the enhanced greenhouse effect primarily due to?

Options:
A Increased emission of heavy metals
B Increased emission of carbon dioxide, methane, nitrous oxide and CFCs
C Increased deforestation
D Increased eutrophication

The correct answer is:
Increased emission of carbon dioxide, methane, nitrous oxide and CFCs

Solution:
The enhanced greenhouse effect is primarily due to increased emission of carbon dioxide, methane, nitrous oxide and CFCs, as well as deforestation.

Topic: Biology, Environmental Issues, NEET
What is the enthalpy change called when an electron is added to a neutral gaseous atom to form a negative ion?

Options:
A Ionization Enthalpy
B Electron Shielding Enthalpy
C Electron Gain Enthalpy
D Electron Repulsion Enthalpy

The correct answer is:
Electron Gain Enthalpy

Solution:
The enthalpy change is the Electron Gain Enthalpy when an electron is added to a neutral gaseous atom to form a negative ion.

Topic: Chemistry, Classification of Elements and Periodicity in Properties, NEET
What is the enthalpy change for the ionization of sodium atoms (Na) to form sodium ions (Na+), given the equation: Na(g) → Na+(g) + e–; ∆iH = 496 kJ mol–1?

Options:
A –496 kJ mol–1
B +496 kJ mol–1
C +108.4 kJ mol–1
D –108.4 kJ mol–1

The correct answer is:
+496 kJ mol–1

Solution:
The enthalpy change for the ionization of sodium atoms to form sodium ions is +496 kJ mol–1, as indicated by the given equation.

Topic: Chemistry, Thermodynamics (C), NEET