datavorous/entrance-exam-dataset huggingface dataset:
In which of the following, asexual spores are generally not seen, but there is the development of a dikaryophase stage?

Options:
A Albugo
B Claviceps
C Alternaria
D Agaricus

The correct answer is:
Agaricus

Solution:
When a fungus reproduces sexually, two haploid hyphae of compatible mating types come together and fuse.
In ascomycetes and basidiomycetes, the fusion of two haploid cells forms an intermediate stage called the dikaryotic stage. In this stage, one cell has two diploid nuclei. This stage is called dikaryophase. Later, the parental nuclei fuse, and the cells become diploid. Asexual spores are generally not seen in basidiomycetes, and they generally undergo fragmentation. Thus, basidiomycetes is the group in which asexual spores are generally not seen but dikaryophase is seen. Albugo belongs to phycomycetes, Claviceps belongs to ascomycetes, Alternaria belongs to deuteromycetes, and Agaricus (mushroom) belongs to basidiomycetes.

Topic: Biology, Biological Classification, NEET
In which of the following assisted reproductive techniques the cryopreserved semen is utilized to achieve fertilization?

Options:
A Intrauterine insemination
B Gamete in vitro fertilization technology
C Gamete intra fallopian transfer
D Intrauterine contraceptive technique

The correct answer is:
Intrauterine insemination

Solution:
In artificial insemination techniques semen are collected from a donor and are preserved in liquid nitrogen so that they become metabolically inactive and will survive for a long period of time.
In intrauterine insemination semen is artificially inseminated inside the uterus of recipient females.

Topic: Biology, Reproductive Health, NEET
In which of the following assisted reproductive technology, sperm is inserted into the egg with the help of microscopic needle?

Options:
A GIFT
B ZIFT
C ICSI
D IVF

The correct answer is:
ICSI

Solution:
ART's (Assisted reproductive technologies) are various techniques which help couples to have children. Examples of such techniques are GIFT (Gamete intra fallopian transfer), ZIFT (Zygote intra fallopian transfer), AI (Artificial insemination), IUT (Intra uterine transfer), ICSI (Intra-cytoplasmic sperm injection) etc. ICSI is a technique in which embryo is formed in the lab by directly infusing sperm inside the ovum. It can be considered as IVF technique (In -vitro fertilization) but it is very different from traditional IVF. In the traditional procedure, the sperms and egg are collected in a petri dish and allowed to fertilise but in ICSI single sperm is injected within the ovum.

Topic: Biology, Reproductive Health, NEET
In which of the following back-bonding is possible

Options:
A BF3
B (SiH3)3N
C NH3
D Both A and B

The correct answer is:
Both A and B

Solution:
In BF3 there is p π - pπ type of back bonding while in (SiH3)3N there is p π - dπ type of back bonding.
Here ammonia does not show back bonding.

Topic: Chemistry, Chemical Bonding and Molecular Structure, NEET
In which of the following bacterial diseases, intestinal perforation and death occur in severe cases?

Options:
A Anthrax
B Tetanus
C Typhoid
D Tuberculosis

The correct answer is:
Typhoid

Solution:
Typhoid disease is caused by a pathogenic bacteria Salmonella typhi. Sustained high fever, weakness, stomach pain, constipation, headache, and loss of appetite are some of the important symptoms. Intestinal perforation and death may occur in severe cases.

Topic: Biology, Human Health and Diseases, NEET
In which of the following bees, wax glands are found

Options:
A Queen bee
B Drone
C Workers
D Both in queen and worker bees

The correct answer is:
Workers

Solution:
In workers, wax glands are found for was secretion workers also produced from the fertile eggs laid by the queen.

Topic: Biology, Strategies for Enhancement in Food Production, NEET
In which of the following, belongs to the same class of algae?

Options:
A Chara, Fucus, Polysiphonia
B Volvox, Spirogyra, Chlamydomonas
C Porphyra, Ectocarpus, Ulothrix
D Sargassum, Laminaria, Gracillaria

The correct answer is:
Volvox, Spirogyra, Chlamydomonas

Solution:
Volvox, Spirogyra, Chlamydomonas, Chara and Ulothrix are all green algae. Fucus, Ectocarpus, sargassum and Laminaria are all brown algae. Polysiphonia, Porphyra and Gracillaria are all red algae.

Topic: Biology, Plant Kingdom, NEET
In which of the following, both autogamy and geitonogamy are prevented?

Options:
A Wheat
B Papaya
C Castor
D Maize

The correct answer is:
Papaya

Solution:
Autogamy and geitonogamy both are prevented in papaya plant. In papaya, male and female flowers are present on different plants that is each plant is either male or female (dioecy).

Topic: Biology, Sexual Reproduction in Flowering Plants, NEET, NEET 2019 (Odisha)
In which of the following both pairs have correct combination?

Options:
A Gaseous nutrient cycle: Carbon and Sulphur; Sedimentary nutrient cycle: Nitrogen and Phosphorus
B Gaseous nutrient cycle: Nitrogen and Sulphur; Sedimentary nutrient cycle: Carbon and phosphorus
C Gaseous nutrient cycle: Sulphur and Phosphorus; Sedimentary nutrient cycle: Carbon and Nitrogen
D Gaseous nutrient cycle: Carbon and Nitrogen; Sedimentary nutrient cycle: Sulphur and phosphorus

The correct answer is:
Gaseous nutrient cycle: Carbon and Nitrogen; Sedimentary nutrient cycle: Sulphur and phosphorus

Solution:
TYPES OF BIOGEOCHEMICAL CYCLES:

i) Gaseous cycle:

The exchange of nutrients occurs in gaseous or vapour form.

Biogeochemical is non–mineral.

The reservoir pool is atmosphere or hydrosphere.

e.g. Nitrogen, carbon, oxygen, and hydrogen cycle.

ii) Sedimentary cycle:

Biogeochemical is mineral.

Reservoir pool is the earth’s crust or lithosphere.

e.g. sulphur and phosphorous cycle.

Topic: Biology, Ecosystem, NEET, NEET 2015 (Phase 2)
In which of the following both pairs have correct combination?

Options:
A

In-situ conservation	Ex-situ conservation

National Park	Botanical gardens

B

In-situ conservation	Ex-situ conservation

Cryopreservation	Wildlife sanctuaries

C

In-situ conservation	Ex-situ conservation

Seed bank	National Park

D

In-situ conservation	Ex-situ conservation

Tissue culture	Wildlife sanctuaries

The correct answer is:

In-situ conservation	Ex-situ conservation

National Park	Botanical gardens

Solution:
In-situ conservation is the conservation of resources in its natural habitat. Examples of In-situ conservation are national parks, biosphere reserve, parks and sanctuaries.

Ex-situ conservation is the conservation of resources outside its habitat may be in the wild area or within human care. The examples are botanical gardens, seed bank, gene bank, etc.

Topic: Biology, Biodiversity and its Conservation, NEET, NEET 2015 (Phase 1)
In which of the following cases H2O2 can act as a reducing agent in an acidic medium? (Hydrogen peroxide acts both as an oxidising and as well as a reducing agent depending upon the nature of the reacting species.)

Options:
A KI
B Cr 2 O 7 2 -
C S O 3 2 -
D Mn O 4 -

The correct answer is:
Mn O 4 -

Solution:
MnO 4 - + 8 H + + 5 e - → Mn 2 + + 4 H 2 O
H 2 O 2 → O 2 + 2 H + + 2 e -
H2O2 acts as a reducing agent get oxidised
4H2O2 +K2Cr2O7 +H2SO4→2CrO5 +K2SO4 +5H2O
CrO5 formation possibility is there, so K2Cr2O7 not selected as choice but KMnO4 selected.

Topic: Chemistry, s Block Elements, NEET
In which of the following categories does the genetic disorder phenylketonuria fall into?

Options:
A Multiple allelism
B Polygenic inheritance
C Multiple factor
D Pleiotropy

The correct answer is:
Pleiotropy

Solution:
The ability of a gene to have multiple phenotypic effects because it influences a number of characters simultaneously is known as pleiotropy. The gene has multiple phenotypic effects because of its ability to control the expression of two or more characters is called a pleiotropic gene. In human beings, pleiotropy is exhibited by syndromes called sickle cell anaemia and phenylketonuria.

Topic: Biology, Principles of Inheritance and Variation, NEET
In which of the following compound is hydroxylic proton the most acidic?

Options:
A
B
C
D

The correct answer is:

Solution:
is having most acidic proton in its hydroxyl group as conjugate base more stabilised by F (-I effect) and removal of H+ is here.

Topic: Chemistry, General Organic Chemistry, NEET
In which of the following compounds does the ratio of anion to cation size have the lowest value?

Options:
A NaCl
B KCl
C MgCl2
D NaBr

The correct answer is:
KCl

Solution:
As the ionic radii decrease in order K+>Na+>Mg2+ and Br->Cl- , therefore, Cl-/K+ has the least values.

Topic: Chemistry, s Block Elements, NEET
In which of the following compounds, nitrogen exhibits highest oxidation state?

Options:
A $\mathrm{N}_2 \mathrm{H}_4$
B $\mathrm{NH}_3$
C $\mathrm{N}_3 \mathrm{H}$
D $\mathrm{NH}_2 \mathrm{OH}$

The correct answer is:
$\mathrm{N}_3 \mathrm{H}$

Solution:
Let the oxidation state of nitrogen in the given compounds be \(x\).
(a) \(\mathrm{N}_2 \mathrm{H}_4\)
\(\begin{aligned}
& 2(x)+(+1) 4=0 \\
& 2 x=-4
\end{aligned}\)
So, \(x=-2\).
(b) \(\mathrm{NH}_3\)
\(x+(+1)^3=0\)
So, \(x=-3\)
(c) \(\mathrm{N}_3 \mathrm{H}\)
\(\begin{aligned}
& (x) 3+(+1)=0 \\
& 3 x=-1
\end{aligned}\)
So, \(x=-1 / 3\)
(d) \(\mathrm{NH}_2 \mathrm{OH}\)
\(\begin{aligned}
& x+(+1) 2+(-2)+(+1)=0 \\
& x+2-2+1=0 \\
& x+1=0
\end{aligned}\)
So, \(x=-1\)
Thus, oxidation state of nitrogen is highest in \(\mathrm{N}_3 \mathrm{H}\).

Topic: Chemistry, Redox Reactions, NEET, NEET 2012 (Screening)
In which of the following compounds, nitrogen exhibits highest oxidation state?

Options:
A N2H4
B NH3
C N3H
D NH2OH

The correct answer is:
N3H

Solution:
N 2 H 4 ⇒ 2 x + 4 + 1 = 0 ⇒ 2 x + 4 = 0
⇒ x = - 2
NH 3 ⇒ x + 3 + 1 = 0 ⇒ x = - 3
N 3 H ⇒ 3 x + 1 + 1 = 0 ⇒ 3 x + 1 = 0
⇒ x = - 1 / 3
NH 2 OH ⇒ x + 2 + 1 - 2 + 1 = 0 ⇒ x + 1 = 0
⇒ x = - 1
Thus, highest oxidation state is -1/3.

Topic: Chemistry, p Block Elements (Group 15, 16, 17 & 18), NEET
In which of the following compounds, the C-Cl bond ionization shall give most stable carbonium ion?

Options:
A
B
C
D

The correct answer is:

Solution:
Stability order of carbocation
Due to +9 Hyper conjugation (i) is most stable carbocation.

Topic: Chemistry, General Organic Chemistry, NEET, NEET 2015 (Phase 1)
In which of the following compounds, the C-Cl bond ionisation shall give most stable carbonium ion?

Options:
A
B
C
D

The correct answer is:

Solution:
Most stable carbonium ion is benzyl carbocation due to resonance.

Topic: Chemistry, General Organic Chemistry, NEET
In which of the following compounds, the nitrogen atom exhibits negative oxidation state?

Options:
A Sodium nitrate
B NO
C Sodium azide
D Sodium nitrite

The correct answer is:
Sodium azide

Solution:
Sodium azide is NaN3 . In azide (N3-) ion the average oxidation number of N is -1/3.
In NO the oxidation number of Nitrogen is +2.
In sodium nitrate (NaNO3) the oxidation number of nitrogen is +5.
In sodium nitrite (NaNO2) the oxidation number of nitrogen is +3.

Topic: Chemistry, p Block Elements (Group 15, 16, 17 & 18), NEET
In which of the following condition, autogamy is prevented but not geitonogamy?

Options:
A Self-incompatibility of pollen and stigma.
B Non-synchronization of pollen and anther release.
C Monoecious condition
D Dioecious condition

The correct answer is:
Monoecious condition

Solution:
If both male and female flowers are present on the same plant such as castor and maize (monoecious), it prevents autogamy but not geitonogamy. In several species such as papaya, male and female flowers are present on different plants, that is each plant is either male or female (dioecy). This condition prevents both autogamy and geitonogamy.

Topic: Biology, Sexual Reproduction in Flowering Plants, NEET
In which of the following condition transpiration will be minimum?

Options:
A Good soil moisture
B	High wind velocity
C Dry environment
D High atmospheric humidity

The correct answer is:
High atmospheric humidity

Solution:
Transpiration is a process of loss of water in the form of vapours from the aerial parts of the plants. Transpiration is inversely proportional to the atmospheric humidity. The rate of transpiration would be higher when humidity is low.

Topic: Biology, Transport in Plants, NEET
In which of the following conditions, a reaction will definitely be spontaneous:

Options:
A Exothermic and increasing disorder
B Exothermic and decreasing disorder
C Endothermic and increasing disorder
D Endothermic and decreasing disorder

The correct answer is:
Exothermic and increasing disorder

Solution:
For a spontaneous reaction, ∆G<0.

As per the Gibbs-Helmholtz equation,

∆G=∆H-T∆S

When ∆H is negative, i.e., the reaction is exothermic and ∆S is positive, i.e., the disorder is increasing, the value of ∆G will definitely be negative and the process will be spontaneous for all temperatures.

Topic: Chemistry, Thermodynamics (C), NEET
In which of the following connective tissues, the cells secrete fibres of collagen or elastin?
A. Cartilage
B. Bone
C. Adipose tissue
D. Blood
E. Areolar tissue
Choose the most appropriate answer from the options given below :

Options:
A B, C, D and E only
B A, B, C and E only
C B, C and D only
D A, C and D only

The correct answer is:
A, B, C and E only

Solution:
The correct answer is option (2) as blood does not contain fibre secreting cells called as fibroblasts. Whereas, cartilage, bone, adipose tissue and areolar tissue contain cells that secrete fibres of collagen or elastin or structural protein.
The other options (1), (3) and (4) are incorrect as they mention blood which lacks fibroblasts.

Topic: Biology, Structural Organisation in Animals, NEET, NEET 2024 (Re-NEET)
In which of the following coordination compounds do the transition metals have an oxidation number of +6?

Options:
A [Cr(H2O)4Cl2]Cl.2H2O
B [Fe(CO)5]
C [(H2O)5Cr-O-Cr(H2O)5]4+
D K2[Cr(CN)2O2(O2)NH3]

The correct answer is:
K2[Cr(CN)2O2(O2)NH3]

Solution:
K2+2[Crx(CN)2-2O2-4(O2)-2NH30]
In this complex, oxide and peroxide both ligands are present
So +2 + x – 8 = 0
x = + 6.

Topic: Chemistry, Coordination Compounds, NEET
In which of the following coordination entities the magnitude of $\Delta_o$ (CFSE in octahedral field) will be maximum?
(Atomic number $\mathrm{Co}=27$ )

Options:
A $\left[\mathrm{Co}\left(\mathrm{H}_2 \mathrm{O}\right)_6\right]^{3+}$
B $\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_6\right]^{3+}$
C $\left[\mathrm{Co}(\mathrm{CN})_6\right]^{3-}$
D $\left[\mathrm{Co}\left(\mathrm{C}_2 \mathrm{O}_4\right)_3\right]^{3-}$

The correct answer is:
$\left[\mathrm{Co}(\mathrm{CN})_6\right]^{3-}$

Solution:
Key Idea: The magnitude of $\Delta_{\propto \mathrm{c} t}$ (the orbital splitting energy) is decided by the nature of ligand Strong field ligand has highest $\Delta_{\text {oct }}$. The increasing field strength is as
$\mathrm{I}^{-} < \mathrm{Br}^{-} < \mathrm{Cl}^{-} < \mathrm{F}^{-} < \mathrm{OH}^{-} < \mathrm{H}_2 \mathrm{O} < \mathrm{C}_2 \mathrm{O}_4^{2-} < \mathrm{NH}_3 < \mathrm{en} < \mathrm{NO}_2^{-} < \mathrm{CN}^{-}$
The $\mathrm{CN}^{-}$is the strongest ligand among these, hence the magnitude of $\Delta_{\text {oct }}$ will be maximum in $\left[\mathrm{Co}(\mathrm{CN})_6\right]^{3-}$.
Note : The magnitude of $\Delta_{\text {oct }}$ is also decided by oxidation state of the metal ion. Thus, greater the ionic charge on the central metal ion, the greater the value of $\Delta_{\text {oct }}$. But here the oxidatinon state of Co metal ion is same in all complexes.

Topic: Chemistry, Coordination Compounds, NEET, NEET 2008 (Screening)
In which of the following crystals alternate tetrahedral voids are occupied ?

Options:
A NaCl
B ZnS
C CaF2
D Na2O

The correct answer is:
ZnS

Solution:
In ZnS structure, sulphides occupy all the lattice points while Zn2+ ions are present in alternative tetrahedral voids.
NaCl has FCC structure and Na+ atom occupied all octahedral hole.
CaF2 has FCC structure and all T-holes will occupied by guest.
Na2O has FCC sturcture and all T-holes wll occupied by guest.

Topic: Chemistry, Solid State, NEET
In which of the following decays the element does not change?

Options:
A γ - decays
B β- - decays
C β+ - decays
D α - decays

The correct answer is:
γ - decays

Solution:
In γ decay only energy photon is released but no change in the element.

Topic: Physics, Nuclear Physics, NEET
In which of the following devices, the eddy current effect is not used?

Options:
A induction furnace
B magnetic braking in train
C electromagnet
D electric heater

The correct answer is:
electric heater

Solution:
In an Induction furnace, a coil carrying AC surrounds the chamber of metal. Eddy currents are induced in the metal. The circulation of these currents generates high temperature which is used to melt metals. After melting, these melted metals are mixed to make alloys of the same composition.

Mechanical brakes are based on friction. But, magnetic brakes have Eddy current. Brakes have a disc which rotates perpendicular to the magnetic field. As the disc rotates, Eddy currents are induced. Then power is dissipated throughout the disc which produces a braking torque.

Eddy current effect is used in the electromagnets are widely used. An example of this can be the ordinary electricity meter in every house. Eddy currents make the aluminium disk in an electricity meter to spin. Then this number of spins or revolutions shows the usage of electricity.
Electric heaters produce heat. They take all the energy and supply it in the form of heat. Eddy current has an efficiency of 100% which means it gives all the energy to do the work. So much heat cannot be used in electric heaters.

Hence, Eddy current is not used in an electric heater.

Topic: Physics, Electromagnetic Induction, NEET, NEET 2019 (All India)
In which of the following disease, the number of TH cells in body considerably decreases over the period of time?

Options:
A AIDS
B Cancer
C Malaria
D Typhoid

The correct answer is:
AIDS

Solution:
Among all infectious diseases, HIV infection or AIDS is the most dangerous and fatal disease. There is no treatment or cure for this disease, and prevention is the best option. HIV enters into helper T-lymphocytes (TH), replicates and produces progeny viruses. The progeny viruses released in the blood attack other helper T-lymphocytes. This is repeated, leading to a progressive decrease in the number of helper T-lymphocytes
in the body of the infected person.

Topic: Biology, Human Health and Diseases, NEET
In which of the following does pollination takes place?

Options:
A Pteridophytes and angiosperms
B Angiosperms and gymnosperms
C Angiosperms and fungi
D Bryophytes and angiosperms

The correct answer is:
Angiosperms and gymnosperms

Solution:
Transfer of pollen grains (shed from the anther) to the stigma of a pistil is termed pollination. Pollen grains, which are responsible for pollination, are found only in gymnosperms and angiosperms, hence pollination occurs in these.

Topic: Biology, Sexual Reproduction in Flowering Plants, NEET
In which of the following ecosystem, productivity is about 55 million tonnes?

Options:
A Forest
B Grassland
C Agroecosystem
D Oceans

The correct answer is:
Oceans

Solution:
Primary productivity depends on the plant species inhabiting a particular area. It also depends on a variety of environmental factors, availability of nutrients and photosynthetic capacity of plants. Therefore, it varies in different types of ecosystems. The annual net primary productivity of the whole biosphere is approximately 170 billion tons (dry weight) of organic matter. Of this, despite occupying about 70 percent of the surface, the productivity of the oceans are only 55 billion tons.

Topic: Biology, Ecosystem, NEET
In which of the following enzyme non-protein part is haem?

Options:
A Carbonic anhydrase
B Peroxidase
C Catalase
D Both (B) and (C)

The correct answer is:
Both (B) and (C)

Solution:
Prosthetic groups are organic compounds and are distinguished from other cofactors in a way that they are tightly bound to the apoenzyme. In peroxidase and catalase, which catalyze the breakdown of hydrogen peroxide to water and oxygen, haem is the prosthetic group and it is a part of the active site of the enzyme.

Topic: Chemistry, Biomolecules, NEET
In which of the following equilibria, $\mathrm{K}_{\mathrm{p}}$ and $\mathrm{K}_{\mathrm{c}}$ are NOT equal?

Options:
A $\mathrm{H}_{2(\mathrm{~g})}+\mathrm{I}_{2(\mathrm{~g})} \rightleftharpoons 2 \mathrm{HI}_{(\mathrm{g})}$
B $\mathrm{CO}_{(\mathrm{g})}+\mathrm{H}_2 \mathrm{O}_{(\mathrm{g})} \rightleftharpoons \mathrm{CO}_{2(\mathrm{~g})}+\mathrm{H}_{2(\mathrm{~g})}$
C $\quad 2 \mathrm{BrCl}_{(\mathrm{g})} \rightleftharpoons \mathrm{Br}_{2(\mathrm{~g})}+\mathrm{Cl}_{2(\mathrm{~g})}$
D $\mathrm{PCl}_{5(\mathrm{~g})} \rightleftharpoons \mathrm{PCl}_{3(\mathrm{~g})}+\mathrm{Cl}_{2(\mathrm{~g})}$

The correct answer is:
$\mathrm{PCl}_{5(\mathrm{~g})} \rightleftharpoons \mathrm{PCl}_{3(\mathrm{~g})}+\mathrm{Cl}_{2(\mathrm{~g})}$

Solution:
$\begin{aligned}
& \mathrm{K}_{\mathrm{p}}=\mathrm{K}_{\mathrm{c}}(\mathrm{RT})^{\Delta \mathrm{n}_{\mathrm{g}}} \\
& \text { for } \mathrm{K}_{\mathrm{p}} \neq \mathrm{K}_{\mathrm{c}} \\
& \qquad \Delta \mathrm{n}_{\mathrm{g}} \neq 0 \\
& \Delta \mathrm{n}_{\mathrm{g}}=\mathrm{n}_{\mathrm{p}}-\mathrm{n}_{\mathrm{r}}
\end{aligned}$
(1) $\Delta \mathrm{n}_{\mathrm{g}}=2-2=0$
(2) $\Delta \mathrm{ng}_{\mathrm{g}}=2-2=0$
(3) $\Delta \mathrm{ng}_{\mathrm{g}}=2-2=0$
(4) $\Delta \mathrm{ng}_{\mathrm{g}}=2-1=1$

Topic: Chemistry, Chemical Equilibrium, NEET, NEET 2024
In which of the following equilibrium $\mathrm{K}_C$ and $\mathrm{K}_{\mathrm{P}}$ are not equal ?

Options:
A $2 \mathrm{NO}(\mathrm{g}) \rightleftharpoons \mathrm{N}_2(\mathrm{~g})+\mathrm{O}_2(\mathrm{~g})$
B $\mathrm{SO}_2(\mathrm{~g})+\mathrm{NO}_2(\mathrm{~g}) \rightleftharpoons \mathrm{SO}_3(\mathrm{~g})+\mathrm{NO}(\mathrm{g})$
C $\mathrm{H}_2(\mathrm{~g})+\mathrm{I}_2(\mathrm{~g}) \rightleftharpoons 2 \mathrm{HI}(\mathrm{g})$
D $2 \mathrm{C}(\mathrm{s})+\mathrm{O}_2(\mathrm{~g}) \rightleftharpoons 2 \mathrm{CO}_2(\mathrm{~g})$

The correct answer is:
$2 \mathrm{C}(\mathrm{s})+\mathrm{O}_2(\mathrm{~g}) \rightleftharpoons 2 \mathrm{CO}_2(\mathrm{~g})$

Solution:
Key Idea The reaction for which the number of moles of gaseous products $\left(n_{\mathrm{p}}\right.$ ) is not equal to the number of moles of gaseous reactants $\left(\mathbf{n}_{\mathrm{R}}\right)$, has different value of $\mathrm{K}_{\mathrm{c}}$ and $\mathrm{K}_{\mathrm{p}}$.
(a) $\boldsymbol{n}_{\mathrm{P}}=\mathbf{n}_{\mathrm{R}}=2$, thus, $\mathrm{K}_{\mathrm{p}}=\mathrm{K}_{\mathrm{c}}$
(b) $\mathrm{n}_{\mathrm{P}}=\mathrm{n}_{\mathrm{R}}=2$, thus, $K_{\mathrm{p}}=\mathrm{K}_{\mathrm{c}}$
(c) $\mathrm{n}_{\mathrm{P}}=\mathrm{n}_{\mathrm{R}}=2$, thus, $\mathrm{K}_{\mathrm{p}}=\mathrm{K}_{\mathrm{c}}$
(d) $n_p=2, n_R=1$, thus, $K_p \neq K_c$

Topic: Chemistry, Chemical Equilibrium, NEET, NEET 2010 (Screening)
In which of the following equilibrium Kc and Kp are not equal?

Options:
A 2C(s)+O2(g)⇌2CO2(g)
B 2NO(g)⇌N2(g)+O2(g)
C SO2(g)+NO2(g)⇌SO3(g)+NO(g)
D H2(g)+I2(g)⇌2HI(g)

The correct answer is:
2C(s)+O2(g)⇌2CO2(g)

Solution:
As Kp=Kc is possible when nP=nR
Here in case of 2C(s)+O2(g)⇌2CO2(g)
nP=2,nR=1
So Δng=2-1=1
Kp=Kc(RT)1
Kp>Kc

Topic: Chemistry, Chemical Equilibrium, NEET
In which of the following examples of motion, can the body be considered approximately a point object:

Options:
A a railway carriage moving without jerks between two stations.
B a monkey sitting on top of a man cycling smoothly on a circular track.
C a spinning cricket ball that turns sharply on hitting the ground.
D a tumbling beaker that has slipped off the edge of a table

The correct answer is:
a railway carriage moving without jerks between two stations.

Solution:
Correct Option is : (A)
a railway carriage moving without jerks between two stations.

Topic: Chemistry, Motion In One Dimension, NEET