datavorous/entrance-exam-dataset huggingface dataset:
Which of the following oxide of Nitrogen is neutral?

Options:
A N2O5
B N2O3
C N2O4
D N2O

The correct answer is:
N2O

Solution:
N2O is neutral oxide of nitrogen also known as laughing gas.

Topic: Chemistry, p Block Elements (Group 15, 16, 17 & 18), NEET
Which of the following oxides are acidic ?
CuO,  Mn 2 O 7 , CO,  SO 2 ,  CrO 3

Options:
A CrO 3 ,  Mn 2 O 7 and SO 2
B Only SO 2
C Mn 2 O 7 and SO 2
D CO and SO 2

The correct answer is:
CrO 3 ,  Mn 2 O 7 and SO 2

Solution:
CuO is basic oxide and CO is neutral oxide.
CrO 3 + H 2 O â H 2 CrO 4 Acid
SO 2 + H 2 O â H 2 SO 3 acid Mn 2 O 7 + H 2 O â 2 HMnO 4 acid

Topic: Chemistry, d and f Block Elements, NEET
Which of the following oxides are formed when Li, Na, and K are heated in air?

Options:
A LiO, Na2O, K2O
B Li2O, Na2O2, K2O2
C Li2O, Na2O2, KO2
D LiO2, NaO2, K2O2

The correct answer is:
Li2O, Na2O2, KO2

Solution:
Correct Option is : (C)
Li2O, Na2O2, KO2

Topic: Chemistry, s Block Elements, NEET
Which of the following oxides contains N–O–N bonds?

Options:
A N2O5
B N2O4
C NO
D N2O

The correct answer is:
N2O5

Solution:
Correct Option is : 1
N2O5

Topic: Chemistry, p Block Elements (Group 15, 16, 17 & 18), NEET
Which of the following oxides contains only one N–O single bond?

Options:
A N2O4
B NO
C N2O3
D N2O5

The correct answer is:
N2O3

Solution:
Correct Option is : 3
N2O3

Topic: Chemistry, p Block Elements (Group 15, 16, 17 & 18), NEET
Which of the following oxides has the largest N–N bond length?

Options:
A N2O
B N2O5
C N2O4
D N2O3

The correct answer is:
N2O3

Solution:
Correct Option is : 4
N2O3

Topic: Chemistry, p Block Elements (Group 15, 16, 17 & 18), NEET
Which of the following oxides has the smallest N–O bond length?

Options:
A N2O4
B NO2
C NO
D N2O

The correct answer is:
NO

Solution:
Correct Option is : 3
NO

Topic: Chemistry, p Block Elements (Group 15, 16, 17 & 18), NEET
Which of the following oxides is expected to exhibit paramagnetic behaviour?

Options:
A $\mathrm{CO}_3$
B $\mathrm{SiO}_2$
C $\mathrm{SO}_2$
D $\mathrm{ClO}_2$

The correct answer is:
$\mathrm{ClO}_2$

Solution:
$\mathrm{ClO}_2$ shows paramagnetic character due to presence of unpaired electron.

Topic: Chemistry, p Block Elements (Group 15, 16, 17 & 18), NEET, NEET 2005
Which of the following oxides is formed when potassium metal in burnt in excess of air?

Options:
A K2O
B K2O2
C KO2
D KO

The correct answer is:
KO2

Solution:
Here potassium superoxide is formed .
4Li+O2→2Li2O (monoxide)
2Na+O2→Na2O2 (peroxide)
K+O2→KO2 (superoxide)

Topic: Chemistry, s Block Elements, NEET
Which of the following oxides is least basic in nature?

Options:
A BaO
B BeO
C MgO
D CaO

The correct answer is:
BeO

Solution:
→BeO<MgO<CaO<BaO
Increasing order of basic nature
As basic character of oxides increases down the group so the least basic should be BeO. In fact, BeO is amphoteric oxide and rest are basic.

Topic: Chemistry, s Block Elements, NEET
Which of the following oxides is most acidic and most basic respectively?
I. CaO ; II.K2O ; III. H2O ; IV. SO3
V. N2O3 VI. SO2 ?

Options:
A IV, II
B V, I
C VI, II
D V, II

The correct answer is:
IV, II

Solution:
SO3IV is the most acidic oxide while K2OII is most basic oxide.
Acidic nature decreases as follows
SO3>SO2>N2O3>H2O>CaO>K2O

Topic: Chemistry, Classification of Elements and Periodicity in Properties, NEET
Which of the following oxides is most acidic in nature?

Options:
A BaO
B BeO
C MgO
D CaO

The correct answer is:
BeO

Solution:
In metals moving down the group metallic character increases, so basic nature increases hence most acidic will be BeO.

Topic: Chemistry, s Block Elements, NEET, NEET 2018
Which of the following oxides is most alkaline in nature?

Options:
A B2O3
B Al2O3
C In2O3
D Tl2O

The correct answer is:
Tl2O

Solution:
Among the group-13 elements, B, Al, Ga, In forms oxide of the type E2O3 on reaction with oxygen. While Tl has +1 state in its oxide and its oxide has the formula Tl2O.

The nature of oxides of group-13 elements varies down the group. Boron trioxide is acidic and reacts with basic (metallic) oxides forming metal borates. Aluminium and gallium oxides are amphoteric and those of indium and thallium are basic in their properties. The basic nature increases as we move down the group. Thus out the given oxides, the most alkaline one is Tl2O.

Topic: Chemistry, p Block Elements (Group 13 & 14), NEET
Which of the following oxides is not expected to react with sodium hydroxide ?

Options:
A $\mathrm{B}_2 \mathrm{O}_3$
B $\mathrm{CaO}$
C $\mathrm{SiO}_2$
D $\mathrm{BeO}$

The correct answer is:
$\mathrm{CaO}$

Solution:
Key Idea Generally acids react with bases and bases (alkalies) react with acids.
Sodium hydroxide, $\mathrm{NaOH}$, being a strong alkali, never react with a basic oxide (compound). Among the given options, $\mathrm{B}_2 \mathrm{O}_3$ and $\mathrm{BeO}$ are amphoteric oxides, $\mathrm{SiO}_2$ is a acidic oxide and $\mathrm{CaO}$ is a basic oxide. Therefore, $\mathrm{NaOH}$ does not react with $\mathrm{CaO}$.

Topic: Chemistry, s Block Elements, NEET, NEET 2009 (Screening)
Which of the following oxides is not expected to react with sodium hydroxide?

Options:
A CaO
B SiO2
C BeO
D B2O3

The correct answer is:
CaO

Solution:
CaO being a basic oxide does not react with NaOH, however SiO2 (acidic oxide), BeO (amphoteric oxide) and B2O3 (acidic oxide) react with NaOH.

Topic: Chemistry, s Block Elements, NEET
Which of the following oxides is strongly basic?

Options:
A Tl 2 O
B B2O3
C Al2O3
D Ga2O3

The correct answer is:
Tl 2 O

Solution:
As we more down the group, the basic nature of the oxides of group 13 elements increases. Tl2O in aqueous solution gives TlOH which is as strong a base as alkali metal hydroxides.

Topic: Chemistry, d and f Block Elements, NEET
Which of the following oxo acids of chlorine is the best oxidizing agent?

Options:
A HClO
B HClO2
C HClO3
D HClO4

The correct answer is:
HClO

Solution:
As the oxidation state of halogen atom increases, the halogen-oxygen bond becomes more covalent. As a result, thermal stability of the acid increases and hence, oxidizing power of oxo acid decreases. In other words, the more oxidation state of the halogen, the lesser is the oxidizing power of its oxo acids. Thus, the oxidizing power oxo acids is in the order HClO > HClO2>HClO3>HClO4. Hence, HClO is the best oxidizing agent.

Topic: Chemistry, p Block Elements (Group 15, 16, 17 & 18), NEET
Which of the following oxoacid contains more than one S–S bonds?

Options:
A Dithionic acid
B Thiosulphorus acid
C Polythionic acid
D Peroxodisulphuric acid

The correct answer is:
Polythionic acid

Solution:
Polythionic acid contains more than one S–S bonds.

Dithionic (H2S2O6) acid and Thiosulphorus (H2S2O2) acid both have 1S-S bond while peroxydisulphuric acid do not have any S-S bond.

Topic: Chemistry, p Block Elements (Group 15, 16, 17 & 18), NEET
Which of the following oxoacid of sulphur has –O–O– linkage?

Options:
A H2SO4, sulphuric acid
B H2S2O8, peroxydisulphuric acid
C H2S2O7, pyrosulphuric acid
D H2SO3, sulphurous acid

The correct answer is:
H2S2O8, peroxydisulphuric acid

Solution:
Peroxydisulphuric acid is an inorganic compound with a chemical formula H2S2O8. Also called Marshall's acid after its inventor, Professor Hugh Marshall, it is a peroxydisulphuric acid. In structural terms, it can be written HO3SOOSO3H. It contains sulfur in its +6 oxidation state and a peroxide group.

Topic: Chemistry, p Block Elements (Group 15, 16, 17 & 18), NEET, NEET 2020 (Phase 1)
Which of the following oxoacids of nitrogen undergoes a disproportionation reaction in which nitrogen is in the +3 oxidation state?

Options:
A Nitric acid (HNO3)
B Nitrous acid (HNO2)
C Hyponitrous acid, (H2N2O2)
D Peroxynitric acid (HNO4)

The correct answer is:
Hyponitrous acid, (H2N2O2)

Solution:
Correct Option is : (C)
Hyponitrous acid, (H2N2O2)

Topic: Chemistry, p Block Elements (Group 15, 16, 17 & 18), NEET
Which of the following oxoacids of phosphorus doesn’t have oxidation no. +5?

Options:
A (HPO3)n
B H4P2O6
C H4P2O7
D H3PO4

The correct answer is:
H4P2O6

Solution:
Correct Option is : 2
H4P2O6

Topic: Chemistry, p Block Elements (Group 15, 16, 17 & 18), NEET
Which of the following oxoacids of phosphorus has oxidation no. +4?

Options:
A Hypophosphorous acid
B Pyrophosphorous acid
C Hypophosphoric acid
D Pyrophosphoric acid

The correct answer is:
Hypophosphoric acid

Solution:
Correct Option is : 3
Hypophosphoric acid

Topic: Chemistry, p Block Elements (Group 15, 16, 17 & 18), NEET
Which of the following oxoacids of phosphorus has strongest reducing property?

Options:
A $\mathrm{H}_4 \mathrm{P}_2 \mathrm{O}_7$
B $\mathrm{H}_3 \mathrm{PO}_3$
C $\mathrm{H}_3 \mathrm{PO}_2$
D $\mathrm{H}_3 \mathrm{PO}_4$

The correct answer is:
$\mathrm{H}_3 \mathrm{PO}_2$

Solution:
$\mathrm{P}-\mathrm{H}$ bonds found in phosphorus acids have reducing properties. Thus, reducing property is directly proportional to number of $\mathrm{P}-\mathrm{H}$ bonds. The structures of given oxoacids of phosphorus are as follows:
$\mathrm{H}_3 \mathrm{PO}_2$ contains $2 \mathrm{P}-\mathrm{H}$ bonds which is maximum among given options. Thus, $\mathrm{H}_3 \mathrm{PO}_2$ has strongest reducing property.

Topic: Chemistry, p Block Elements (Group 15, 16, 17 & 18), NEET, NEET 2019 (Odisha)
Which of the following p-V curve represents maximum work done?

Options:
A

B

C

D

The correct answer is:

Solution:
The area under the P-V curve represents the work done. Work can be calculated by calculating area between P-V graph and volume axis. Among the given graphs, the area under the curve is maximum for graph A.

Option B represent isochoric process so, work done will be zero.

Option C and option D has less area under the curve.

Topic: Chemistry, Thermodynamics (C), NEET, NEET 2022 (Phase 1)
Which of the following pair belongs to basidiomycetes?

Options:
A Puff ball and claviceps
B Morchella and mushroom
C Peziza and aspergillus
D Bracket fungi and puffball

The correct answer is:
Bracket fungi and puffball

Solution:
Bracket fungi and Puffball are members of Basidiomycetes. Claviceps, Peziza and Morchella are members of ascomycetes fungi.

Topic: Biology, Biological Classification, NEET
Which of the following pair have same dimensional formula?

Options:
A Angular momentum, Torque
B Torque, Work
C Planck constant, Boltzmann constant
D Gas constant, Pressure

The correct answer is:
Torque, Work

Solution:
Torque and Work have same dimensional formula = ML2T-2.

Topic: Physics, Units and Dimensions, NEET
Which of the following pair is correct?

Options:
A Mn - formation of chlorophyll
B P - required in meristematic tissues
C Ca - formation of the mitotic spindle
D Cu - synthesis of auxin

The correct answer is:
Ca - formation of the mitotic spindle

Solution:
Plant absorbs calcium from the soil in the form of calcium ions (Ca2+). Calcium is required by meristematic and differentiating tissues. During cell division, it is used in the synthesis of the cell wall, particularly as calcium pectate in the middle lamella. It is also needed during the formation of the mitotic spindle. It accumulates in older leaves. It is involved in the normal functioning of the cell membranes. It activates certain enzymes and plays an important role in regulating metabolic activities.

Topic: Biology, Mineral Nutrition, NEET
Which of the following pair of assisted reproductive techniques involves in-vivo fertilisation?

Options:
A ZIFTÂ andÂ GIFT
B GIFTÂ andÂ IUT
C ICSIÂ andÂ GIFT
D GIFT and IUI

The correct answer is:
GIFT and IUI

Solution:
Test Tube baby programme involves in-vitro fertilisation followed by zygote/embryo transfer inside the female body either through ZIFT or IUT. ICSI is another specialised procedure to form an embryo in the lab or in vitro.

Topic: Biology, Reproductive Health, NEET
Which of the following pair of assisted reproductive techniques involves In-vivo fertilization?

Options:
A GIFT & ZIFT
B ZIFT & ICSI
C IUI & GIFT
D IUI & ICSI

The correct answer is:
IUI & GIFT

Solution:
Techniques such as ZIFT and ICSI both involves fertilization of ovum with sperm outside the female body that is In-vitro.
Infertility cases either due to inability of the male partner to inseminate the female or due to very low sperm counts in the ejaculates, could be corrected by artificial insemination (AI) technique. In this technique, the semen collected either from the husband or a healthy donor is artificially introduced either into the vagina or into the uterus (IUI – intra-uterine insemination) of the female.
Embryos formed by in-vivo fertilisation (fusion of gametes within the female) also could be used for such transfer to assist those females who cannot conceive. Transfer of an ovum collected from a donor into the fallopian tube (GIFT – gamete intra fallopian transfer) of another female who cannot produce one, but can provide suitable environment for fertilisation and further development is another method attempted.

Topic: Biology, Reproductive Health, NEET
Which of the following pair of evidences indicates the common ancestry?

Options:
A Homologous organs&analogous organs
B Homologous organs & vestigeal organs
C Analogous organs & vestigeal organs
D Both A and C

The correct answer is:
Homologous organs & vestigeal organs

Solution:
Homologous organs have common or same origin, which perform different or sometimes same functions in different organisms. The phenomenon is called homology, which indicates common ancestry. Vestigeal or rudimentary organs are non-functional, less developed, which were well developed and were functional in their ancestors. This also indicates common ancestry.

Topic: Biology, Evolution, NEET
Which of the following pair of hormones are antagonistic in action?

Options:
A Calcitonin and parathormone
B Somatostatin and GHRH
C Adrenaline and insulin
D All of the above

The correct answer is:
All of the above

Solution:
Calcitonin decreases blood calcium level (hypocalcemic effect) whereas parathormone increases blood calcium level (hypercalcemic effect). Insulin hormone decreases blood glucose level (anti-diabetogenic) whereas glucagon, cortisol and adrenaline hormone increase blood glucose level (diabetogenic). Somatostatin a hypothalamic hormone inhibits production of somatotrophin or growth hormone from anterior pituitary, while GHRH stimulates production of growth hormone.

Topic: Biology, Chemical Coordination and Integration, NEET
Which of the following pair of isomers cannot be separated by fractional crystallization or distillation or chromatography?

Options:
A Maleic acid and Fumaric acid
B +-Tartaric acid and meso-tartaric acid
C and H2N-CH2-CH2-COOH
D +-lactic acid and --lactic acid

The correct answer is:
+-lactic acid and --lactic acid

Solution:
Enantiomers are similar in physical properties

Topic: Chemistry, General Organic Chemistry, NEET
Which of the following pair of organelles does not contain DNA?

Options:
A Mitochondria and Lysosomes
B Chloroplast and Vacuoles
C Lysosomes and Vacuoles
D Nuclear envelope and Mitochondria

The correct answer is:
Lysosomes and Vacuoles

Solution:
Lysosomes are membrane-enclosed organelles that contain an array of enzymes capable of breaking down all types of biological polymers, they lack Genetic material in them.
Vacuoles are lytic compartments, function as reservoirs for ions and metabolites, including pigments, and are crucial to processes of detoxification and general cell homeostasis, Dna is absent in them.

Topic: Biology, Cell - The Unit of Life, NEET, NEET 2019 (All India)
Which of the following pair of salts produce odourless gas with dil H2SO4?

Options:
A HCO3- and HSO3-
B HCO3- and CO32-
C S2O32- and CH3CO2-
D CO32- and CH3CO2-

The correct answer is:
HCO3- and CO32-

Solution:
HCO3- and CO32- will produce odourless gas i.e. carbon dioxide with dil. H2SO4.
NaHCO3Baking sodaâ¡aq+H2SO4aqâNa2SO4aq+2CO2g+2H2Ol
Na2COWashing sodaâ¡+H2SO4aqâNa2SO4aq+H2Ol+CO2g

Topic: Chemistry, s Block Elements, NEET
Which of the following pair of species have identical shape?

Options:
A CO2,SO2
B CIF3,BF3
C XeF 2 , l 3 −
D SO42-,XeF4

The correct answer is:
XeF 2 , l 3 −

Solution:
Both XeF2sp3d2I3-sp3d have linear shape

Topic: Chemistry, Chemical Bonding and Molecular Structure, NEET
Which of the following pair represents free living nitrogen fixing aerobic bacteria?

Options:
A Rhizobium and Frankia
B Azotobacter and Beijerinckia
C Anabaena and Rhodospirillum
D Pseudomonas and Thiobacillus

The correct answer is:
Azotobacter and Beijerinckia

Solution:
Azotobacter and Beijerinckia are free living, $\mathrm{N}_2$ fixing, Aerobic bacteria. Rhizobium and Frankia are associated bacteria. Pseudomonas and Thiobacillus are denitrifying bacteria while Rhodospirillum is anaerobic non, $\mathrm{N}_2$ Fixing bacteria.

Topic: Biology, Mineral Nutrition, NEET, NEET 2022 (Phase 2)
Which of the following pairs are diastereomers?

Options:
A
B
C
D All of these

The correct answer is:

Solution:
Diastereomers are pair of stereoisomers which are not mirror image of each other’s. Pair of Geometrical isomers are pairs of diastereomers.

Topic: Chemistry, General Organic Chemistry, NEET
Which of the following pairs are enantiomers?

Options:
A
B
C
D

The correct answer is:

Solution:
Both are mirror image of each other which from non-super imposible images.

Topic: Chemistry, General Organic Chemistry, NEET
Which of the following pairs are the correct symbol and SI units of Luminous Intensity ?

Options:
A T , Kelvin
B
,Candela
C n ,Candela
D n , mole

The correct answer is:
,Candela

Solution:
Correct Option is : 2

,Candela

Topic: Chemistry, Some Basic Concepts of Chemistry, NEET
Which of the following pairs consists of false fruits?

Options:
A Apple and Cashewnut
B Pineapple and Mulberry
C Pear and Strawberry
D All the above

The correct answer is:
All the above

Solution:
The fertilized mature ovule containing the embryo surrounded by layer of hard coat is generally called as seed. While the ovary in the flowering plant develops into a fruit after fertilization. Fruit is a characteristic feature found in flowering plants. Fruit formed from a group of flowers or inflorescence is called as multiple fruit or composite fruit. Each flower of the inflorescence produces a fruit but all join/fuse into a single mass. Example pineapple and mulberry.
Many a times the bulk of the fruit that is developing is not derived from the ovary but from other floral parts. Such fruits are called as false fruit, pseudo-fruits or accessory fruits.
In apple and pear, the thalamus or floral tube develops around the pericarp producing the bulk of the edible part. Pineapple and mulberry fruits are derived from receptacle of the flower than wholly from the ovary.
In the development of fruit for cashew, the pedicel forms the major bulk of the fruit than ovary.

Topic: Biology, Morphology of Flowering Plants, NEET
Which of the following pairs constitutes a buffer?

Options:
A HCl and KCl
B HNO2 and NaNO2
C NaOH and NaCl
D HNO3 and NH4NO3

The correct answer is:
HNO2 and NaNO2

Solution:
HNO2 and NaNO2 are examples of acidic buffer.

Topic: Chemistry, Ionic Equilibrium, NEET
Which of the following pairs correctly matches the energy components of an LC circuit with their analogues in a harmonically oscillating spring-block system?

Options:
A Magnetic energy - Kinetic energy Electrical energy - Potential energy
B Magnetic energy - Potential energy Electrical energy - Kinetic energy
C Magnetic energy - Potential energy Electrical energy - Potential energy
D Magnetic energy - Kinetic energy Electrical energy - Kinetic energy

The correct answer is:
Magnetic energy - Kinetic energy Electrical energy - Potential energy

Solution:
Correct Option is : (A)
Magnetic energy - Kinetic energy Electrical energy - Potential energy

Topic: Chemistry, Alternating Current, NEET
Which of the following pairs does not have similar dimensions?

Options:
A Tension and surface tension
B Stress and pressure
C Planck’s constant and angular momentum
D Angle and strain

The correct answer is:
Tension and surface tension

Solution:
Tension will have dimensions of force and surface tension will have dimension of force per unit length, so they have different dimensions.

Topic: Physics, Units and Dimensions, NEET
Which of the following pairs from the same osazone?

Options:
A Glucose and fructose
B Glucose and galactose
C Glucose and arabinose
D Lactose and maltose

The correct answer is:
Glucose and fructose

Solution:
All monosaccharides which differ in configuration at C1 and C2 gives the same osazone. Since, glucose and fructose differ from each other only in configuration at C1 and C2 therefore, they give the same osazone. All other options given in the questions do not satisfy this condition and hence, do not form the same osazone.

Topic: Chemistry, Biomolecules, NEET
Which of the following pairs has a haploid structure?

Options:
A Nucellus and antipodal cells
B Antipodal cells and egg cell
C Antipodal cells and megaspore mother cell
D Nucellus and primary endosperm nucleus

The correct answer is:
Antipodal cells and egg cell

Solution:
(a) Nucellus - 2n, antipodal cells - n
(b) Antipodal cells - n, egg cell - n
(c) Antipodal cells - n, megaspore mother cell - 2n
(d) Nucellus- 2n, primary endosperm nucleus - 3n
Antipodal and egg cell are the product of meiotic division, while the rest are not.

Topic: Biology, Sexual Reproduction in Flowering Plants, NEET
Which of the following pairs has the same size?

Options:
A Zn2+,Hf4+
B Fe2+,Ni2+
C Zr4+,Ti4+
D Zr4+,Hf4+

The correct answer is:
Zr4+,Hf4+

Solution:
Here Zr+4 (4d) and Hf+4 (5d) are having same size which is possible due to poor screening effect by inner d or f orbitals electrons due to highly diffused shape of these orbitals or Lanthanide contraction in Hf.

Topic: Chemistry, d and f Block Elements, NEET
Which of the following pairs has the same size?

Options:
A $\mathrm{Fe}^{2+}, \mathrm{Ni}^{2+}$
B $\mathrm{Zr}^{4+}, \mathrm{Ti}^{4+}$
C $\mathrm{Zr}^{4+}, \mathrm{Hf}^{4+}$
D $\mathrm{Zn}^{2+}, \mathrm{Hf}^{4+}$

The correct answer is:
$\mathrm{Zr}^{4+}, \mathrm{Hf}^{4+}$

Solution:
In general, the atomic and ionic radii increases on moving down a group. But the elements of second transition series (eg, $\mathrm{Zr}, \mathrm{Nb}$, Mo etc) have the almost same radii as the elements of third transition series (eg, Hf, Ta, W etc). This is because of lanthanide contraction ie, imperfect shielding of one $4 \mathrm{f}$-electron by another.

Topic: Chemistry, Structure of Atom, NEET, NEET 2010 (Screening)
Which of the following pairs have different types of roots?

Options:
A Bean, Mustard
B Wheat, Jowar
C Maize, Mustard
D grass, Monstera

The correct answer is:
Maize, Mustard

Solution:
Maize is a monocot with fibrous roots and Mustard is a dicot with tap root. Bean and mustard both are dicots with tap root. Wheat and Jowar both are monocots with fibrous roots. In grass and Monstera adventitious roots are present.

Topic: Biology, Morphology of Flowering Plants, NEET
Which of the following pairs is a gaseous type of biogeochemical cycle?

Options:
A Phosphorus and nitrogen
B Phosphorus and sulphur
C Oxygen and nitrogen
D Phosphorus and carbon dioxide

The correct answer is:
Oxygen and nitrogen

Solution:
Biogeochemical cycles are of two types: gaseous and sedimentary. In gaseous nutrient cycles, the materials involved in circulation between biotic and abiotic components of biosphere are gases or vapours and the reservoir pool is atmosphere or hydrosphere, e.g., carbon, hydrogen, oxygen, nitrogen, water. In sedimentary nutrient cycles, materials involved in circulation between biotic and abiotic components of biosphere are nongaseous and the reservoir pool is lithosphere, e.g., phosphorus, calcium, magnesium. Sulphur has both sedimentary and gaseous nutrient cycles.

Topic: Biology, Ecosystem, NEET