datavorous/entrance-exam-dataset huggingface dataset:
The homologous chromosomes line up at the equator in pairs, name of phase and sequence

Options:
A metaphase of mitosis
B metaphase of meiosis-1
C both metaphases of meiosis
D both a and b

The correct answer is:
metaphase of meiosis-1

Solution:
During metaphase I, the homologous chromosomes are arranged at the metaphase plate roughly in the midline of the cell, with the kinetochores facing opposite poles. The homologous pairs orient themselves randomly at the equator.

Topic: Biology, Cell Cycle and Cell Division, NEET
The homopolymer formed from 4-hydroxy-butanoic acid is

Options:
A
B
C
D

The correct answer is:

Solution:
PHB (poly hydroxy butyrate) is a biodegradable polymer formed here.

Topic: Chemistry, Polymers, NEET
The horizontal component of the earth's magnetic field at any place is 0.36Ã10-4 Wb m-2 . If the angle of dip at that place is 60Â° then the value of the vertical component of earth's magnetic field will be (in Wb m-2 )

Options:
A 0.12×10-4
B 0.24×10-4
C 0.40×10-4
D 0.62×10-4

The correct answer is:
0.62×10-4

Solution:
Given,

BH=0.36×10-4 Wb m-2

Angle of dip

tanθ=BVBH

tan60°=BV0.36×10-4

BV=0.363×10-4

BV=0.62×10-4 Wb m-2

Topic: Physics, Magnetic Properties of Matter, NEET
The horizontal range and the maximum height of a projectile are equal. The angle of projection of the projectile is

Options:
A $\theta=\tan ^{-1}\left(\frac{1}{4}\right)$
B $\theta=\tan ^{-1}(4)$
C $\theta=\tan ^{-1}(2)$
D $\theta=45^{\circ}$

The correct answer is:
$\theta=\tan ^{-1}(4)$

Solution:
Given, $R=H$
Range $R=\frac{u^2(2 \sin \theta \cos \theta)}{g}$
Height $H=\frac{u^2 \sin ^2 \theta}{2 g}$
Hence, $\frac{u^2(2 \sin \theta \cos \theta)}{g}=\frac{u^2 \sin ^2 a}{2 g}$
$\begin{aligned}
2 \cos \theta & =\frac{\sin \theta}{2} \\
\tan \theta & =4 \\
\theta & =\tan ^{-1}(4)
\end{aligned}$

Topic: Physics, Motion In Two Dimensions, NEET, NEET 2012 (Screening)
The horizontal range of an oblique projectile is equal to the distance through which a projectile has to fall freely from rest to acquire a velocity equal to the velocity of projection in magnitude. The angle of projection is

Options:
A 75°
B 60°
C 45°
D 30°

The correct answer is:
75°

Solution:
Using v2-u2=2aS, we get
S=v22g
Now, v2sin⁡2θg=v22g or sin⁡2θ=12
Or sin⁡2θ=sin⁡30° or θ=15°
The other possible angle of projection is 90°-15° , i.e., 75°.

Topic: Physics, Motion In Two Dimensions, NEET
The hormone of pars intermedia is responsible for:

Options:
A Darkening of skin in lower vertebrates
B Regulates the growth of the mammary glands and formation of milk in them
C It stimulates milk ejection from the mammary gland
D Stimulates the synthesis and secretion of steroid hormones called glucocorticoids

The correct answer is:
Darkening of skin in lower vertebrates

Solution:
Melanocyte-simulating hormone (MSH) or melanotropin is secreted by the intermediate lobe of the adenohypophysis (pars intermedia) of pituitary gland in mammals (other than man) so named 'intermedin'. In lower vertebrates, it targets chromatophores, so that the skin colour darkens. In birds & human beings and other mammals, its role is uncertain but in man it is probably responsible for bronzing of skin, moles etc.

Topic: Biology, Chemical Coordination and Integration, NEET
The hormone of the adrenal cortex which causes Na+ retention and K+ excretion is

Options:
A Corticosol
B Corticosterone
C Cortisol
D Aldosterone

The correct answer is:
Aldosterone

Solution:
Mineralocorticoids hormones are 21-carbon steroids secreted by the cells of zona glomerulosa of adrenal cortex. The principal mineralcorticoid is aldosterone. It is a salt retaining hormone”. It upgrades sodium ion concentration in the ECF by promoting reabsorption of sodium ions from renal tubules and excretion of potassium ions in urine.

Topic: Biology, Chemical Coordination and Integration, NEET
The hormone of the thymus gland which hastens the attainment of sexual maturity is

Options:
A Thymosin
B Thymopoietin
C Thymulin
D All of these

The correct answer is:
All of these

Solution:
Thymosin produced from the thymus gland has a role in seasonal breeding and sexual maturity. This hormone is a prime activator of the immune system to trigger the production of T-cells. Similarly, the thymulin and thymopoietin also activates the bursa of B-cells and helps in sexual maturity.

Topic: Biology, Chemical Coordination and Integration, NEET
The hormone released by the pineal gland of the human brain is concerned with:

Options:
A Anger
B Body temperature
C Colouration of skin
D Sleep

The correct answer is:
Sleep

Solution:
Pineal gland secretes two hormones - melatonin and serotonin. Melatonin play an important role in regulating sleep patterns (Circardian rhythms). Serotonin in neurotransmitter that allows bidirectional communication between central nervous system (CNS) and GI tract.

Topic: Biology, Chemical Coordination and Integration, NEET
The hormone responsible for nutrient mobilization which helps in the delay of leaf senescence is

Options:
A auxin.
B gibberellin.
C cytokinin
D ethylene.

The correct answer is:
cytokinin

Solution:
Natural cytokinins are synthesised in regions where rapid cell division occurs, for example, root apices, developing shoot buds, young fruits etc. It helps to produce new leaves, chloroplasts in leaves, lateral shoot growth and adventitious shoot formation. Cytokinins help overcome the apical dominance. They promote nutrient mobilisation which helps in the delay of leaf senescence.

Topic: Biology, Plant - Growth and Development, NEET
The hormone that acts with other hormones to initiate secretion of milk by the mammary glands is

Options:
A luteotrophin
B prolactin
C oxytocin
D both a and b

The correct answer is:
both a and b

Solution:
Prolactin is secreted by the anterior pituitary in a pregnant female which is responsible for the synthesis of milk in breast. Oxytocin causes let down of milk. The prolactin hormone combines with other hormones to initiate secretion of milk by the mammary glands. prolactin is also known as luteotrophin.

Topic: Biology, Chemical Coordination and Integration, NEET
The hormone that can increase the rate of breakdown of glycogen, the volume of blood in vessel and rate of heartbeat is

Options:
A insulin.
B glucagon.
C adrenaline.
D FSH.

The correct answer is:
adrenaline.

Solution:
Adrenaline increases the rate of heart beat and cardiac output, so increases blood pressure. Epinephrine markedly stimulates glycogen breakdown in muscle and, to a lesser extent, in the liver. The liver is more responsive to glucagon, a polypeptide hormone that is secreted by the Î± cells of the pancreas when the blood-sugar level is low.

Topic: Biology, Chemical Coordination and Integration, NEET
The hormone that can replace the process of vernalisation is

Options:
A Cytokinins
B Gibberellins
C Auxin
D Ethylene

The correct answer is:
Gibberellins

Solution:
Vernalisation refers especially to the promotion of flowering by a period of low temperature. It prevents precocious reproductive development late in the growing season and enables the plant to have sufficient time to reach maturity. Gibberellins initiate growth in plants by stimulating cell elongation, and thereby, antagonistically, it regulates the process of vernalisation.

Topic: Biology, Plant - Growth and Development, NEET
The hormone that helps in the conversion of glucose to glycogen is:

Options:
A cortisone
B bile acids
C adrenaline
D insulin

The correct answer is:
insulin

Solution:
Insulin stimulates the liver to convert the blood glucose into glycogen for storage. If the blood sugar goes too low, the pancreas release glucagon, which causes the liver to turn stored glycogen back into glucose and release it into the blood.

Topic: Chemistry, Biomolecules, NEET, NEET 2004
The hormone that helps in the conversion of glucose to glycogen is

Options:
A cortisone
B bile acids
C adrenaline
D insulin

The correct answer is:
insulin

Solution:
Insulinhelps in the conversion of glucose into glycogen in the body.Insulinallows glucose to be taken into the cells of your body where it is used in cellular respiration. It also allows soluble glucose to be converted to an insoluble carbohydrate called glycogen which is stored in theliverand muscles.

Topic: Chemistry, Biomolecules, NEET
The hormone that induces apical dominance and the hormone that acts as an antagonist to this process is

Options:
A IAA and ethylene
B NAA and Zeatin
C IBA and NAA
D Kinetin and BAP

The correct answer is:
NAA and Zeatin

Solution:
In most higher plants, the growing apical bud inhibits growth of the lateral buds, a phenomenon called apical dominance and is induced by auxins like NAA, 2,4 D, IAA etc. Removal of shoot tips (decapitation) or addition of cytokinins like zeatin, kinetic etc., usually results in the growth of lateral buds. It is widely applied in tea plantation, hedge making. Cytokinin helps to overcome apical dominance.

Topic: Biology, Plant - Growth and Development, NEET
The hormone that promotes female flowers in cucumbers is:

Options:
A Auxins
B Gibberellins
C Cytokinins
D ​Ethephon

The correct answer is:
​Ethephon

Solution:
Ethephon hastens fruit ripening in tomatoes and apples and accelerates abscission in flowers and fruits (thinning of cotton, cherry, walnut). It promotes female flowers in cucumbers thereby increasing the yield.

Topic: Biology, Plant - Growth and Development, NEET
The hormone that stimulates the stomach to secrete gastric juice is

Options:
A gastrin.
B enterogastrone.
C secretin.
D cholecystokinin.

The correct answer is:
gastrin.

Solution:
Endocrine cells present in different parts of the gastrointestinal tract secrete four major peptide hormones, namely gastrin, secretin, cholecystokinin (CCK) and gastric inhibitory peptide (GIP). Gastrin acts on the gastric glands and stimulates the secretion of hydrochloric acid and pepsinogen. Secretin acts on the exocrine pancreas and stimulates secretion of water and bicarbonate ions. CCK acts on both pancreas and gall bladder and stimulates the secretion of pancreatic enzymes and bile juice, respectively. GIP inhibits gastric secretion and
motility.

Topic: Biology, Chemical Coordination and Integration, NEET
The hormone which increases alertness pupillary dilation, piloerection is chemically:

Options:
A Peptide hormone
B Steroid hormone
C Iodothyronine
D Amino acid derivative

The correct answer is:
Amino acid derivative

Solution:
Adrenaline is an amino acid derivative. They are secreted in response to the stress of any kind and during emergency situations. Adrenaline and noradrenaline are rapidly secreted in response to stress of any kind and during emergency situations and are called emergency hormones or hormones of fight or flight. These hormones increase alertness, pupillary dilation, piloerection (raising of hairs), sweating etc. Both the hormones increase the heart beat, the strength of heart contraction and the rate of respiration.

Topic: Biology, Chemical Coordination and Integration, NEET
The hormone which regulates the growth of mammary glands and formation of milk in them is secreted by

Options:
A The gland attached to the hypothalamus by a stalk
B The gland situated at the base of diencephalon
C The gland situated near the trachea
D The gland situated near the aorta

The correct answer is:
The gland attached to the hypothalamus by a stalk

Solution:
The hormone which regulates the growth of mammary glands and formation of milk in them is prolactin. Prolactin is secreted by the pituitary gland, which is attached to the hypothalamus by a stalk. The gland situated at the base of diencephalon is hypothalamus. It secretes oxytocin, vasopressin and various releasing and inhibitory factors. The gland situated near the trachea is thyroid which produces thyroxine and calcitonin. The gland situated near the aorta is thymus which secretes thymosine which helps in maturation of T- lymphocytes

Topic: Biology, Chemical Coordination and Integration, NEET
The hormone which stimulates the 'let down' release of milk from mother's breast when the baby is suckling is

Options:
A prolactin
B progesterone
C oxytocin
D relaxin

The correct answer is:
oxytocin

Solution:
Oxytocin hormone is secreted by posterior pituitary gland. It helps in the ejection of milk from mother's breasts, when the baby is sucking.

Topic: Biology, Human Reproduction, NEET
The hormones A and B secreted by Islet of Langerhans cause hyperglycemia and hypoglycemia, respectively

Options:
A A:insulin, B:glucagon
B A:somtatostatin, B:insulin
C A:glucagon, B:insulin
D A:insulin, B:somatostatin

The correct answer is:
A:glucagon, B:insulin

Solution:
The α-cells of the Islets of Langerhans are responsible for the secretion of glucagon. Glucagon is responsible for glycogenolysis. Hence, it causes hyperglycemia. The β-cells of the Islet of Langerhans are responsible for the secretion of insulin. Insulin is responsible for glycogenesis and hence caused hypoglycemia.

Topic: Biology, Chemical Coordination and Integration, NEET
The hormones that initiate ejection of milk, stimulates milk production and growth of ovarian follicles are respectively known as

Options:
A PRL, OT and LH
B PRH, OT and LH
C OT, PRL and FSH
D LH, PRL and FSH

The correct answer is:
OT, PRL and FSH

Solution:
Gonadotrophins released by pituitary gland are FSH (Follicle stimulating hormone) and LH (Luetinizing hormone). These hormones are released under the influence of Hypothalamic hormones. FSH is responsible for formation and growth of follicles while LH causes ovulation and formation of corpus luteum. Oxytocin is known as birth hormone. This hormone causes ejection of milk and also contraction of uterus during child birth. Oxytocin is released from posterior pituitary but secreted by Hypothalamic nuclei. After child birth the suckling of nipples cause release of oxytocin and thus milk is ejected but production of milk is done by prolactin hormone. Prolactin (PRL) is released by anterior pituitary and causes formation of milk by mammary glands. Thus Oxytocin and PRL are together responsible for lactation.

Topic: Biology, Chemical Coordination and Integration, NEET
The hormones which increase alertness, pupillary dilation, piloerection and sweating are

Options:
A Peptide hormones
B Steroid hormones
C Iodothyronine
D Amino acid derivatives

The correct answer is:
Steroid hormones

Solution:
Adrenaline is derived from catecholamines, which are amino acid derivatives. They are secreted in response to the stress of any kind and during emergency situations.

Topic: Biology, Chemical Coordination and Integration, NEET
The human chromosome with the highest and least number of genes in they are respectively:

Options:
A Chromosome 21 and Y
B Chromosome 1 and X
C Chromosome 1 and Y
D Chromosome X and Y

The correct answer is:
Chromosome 1 and Y

Solution:
The human chromosome 1 has the highest number of genes whereas human chromosome Y has the least.

Topic: Biology, Molecular Basis of Inheritance, NEET
The human cranium is made of ___ bones.

Options:
A Five
B Six
C Seven
D Eight

The correct answer is:
Eight

Solution:
The human cranium is made of eight bones.

Topic: Biology, Locomotion and Movement, NEET
The human hindbrain comprises three parts, one of which is

Options:
A spinal cord
B corpus callosum
C cerebellum
D hypothalamus

The correct answer is:
cerebellum

Solution:
The hindbrain generally has its anterior roof enlarged to form a pair of cerebellar hemispheres. Its floor is thickened to form the pons anteriorly and the medulla oblongata posteriorly.

Topic: Biology, Neural Control and Coordination, NEET, NEET 2012 (Screening)
The human kidney

Options:
A Is responsible for the storage of nutrients such as glycogen
B Concentrates the urine by actively transporting water out of the filtrate
C Produces more dilute urine when the collecting ducts become less permeable to water
D Responds to antidiuretic hormone by increasing urine output

The correct answer is:
Produces more dilute urine when the collecting ducts become less permeable to water

Solution:
The filtrate from the distal convoluted tubule enters the collecting tubule, where further reabsorption of water occurs. Now the filtration becomes more concentrated, which makes the filtrate hypertonic. If the collecting duct becomes less permeable to water, more diluted urine will be formed (hypotonic).

Topic: Biology, Excretory Products and their Elimination, NEET
The human placenta does not secrete which of the following hormone?

Options:
A Human chorionic gonadotropin (hCG)
B Human placental lactogen (hPL).
C Androgens
D Progestogens.

The correct answer is:
Androgens

Solution:
Placenta also acts as an endocrine tissue and produces the following hormones:
A. Human chorionic gonadotropin (hCG). B. Human placental lactogen (hPL).
C. Estrogens. D. Progestogens.
The placenta is connected to the embryo through the umbilical cord. The ovary produces relaxin hormone in the later phase of pregnancy. Hormones produced in women only during pregnancy: hCG, hPL, and relaxin.
Hormones that are increased in concentration (by several folds) in maternal blood during pregnancy: Estrogens, progestogens, cortisol, prolactin, thyroxine, etc.

Topic: Biology, Human Reproduction, NEET
The human red blood cells are about _______ in diameter.

Options:
A 7.0 Î¼m
B 9.0 Î¼m
C 5.4 Î¼m
D 4.5 Î¼m

The correct answer is:
7.0 μm

Solution:
The human red blood cells are about 7.0 μm in diameter. These RBCs are the cells with hemoglobin and are involved in carrying the oxygen to the cells.

Topic: Biology, Cell - The Unit of Life, NEET
The hybrid state and oxidation state of S in SF4 are respectively.

Options:
A sp3,+4
B sp2,+6
C sp3d,+4
D dsp3,+6

The correct answer is:
sp3d,+4

Solution:
In SF4,S atom assumes sp3d of hybridisation state as it has 4 bond pair and 1 lone pair and its oxidation state is + 4.

Topic: Chemistry, Chemical Bonding and Molecular Structure, NEET
The Hybridisation of atomic orbitals of nitrogen in NO 2 +, NO 3 -, and NH 4 + are?

Options:
A sp2 ,sp ,and sp3 Respectively.
B sp2 , sp3 and sp Respectively
C sp , sp3 and sp2 respectively.
D sp , sp2 and sp3 respectively.

The correct answer is:
sp , sp2 and sp3 respectively.

Solution:
As per VSEPR Theory â
NO 2 + â H = 1 2 5 - 1 = 2, sp Hybridisation.
NO 3 - â H = 1 2 5 + 1 = 3, sp2 Hybridisation.
NH 4 + â H = 1 2 5 + 4 - 1 = 4, sp3 Hybridisation

Topic: Chemistry, Chemical Bonding and Molecular Structure, NEET
The hybridisation of central metal ion and shape of Wilkinson's catalyst is

Options:
A dsp2 , square planar
B sp3 , tetrahedral
C d2sp3 , octahedral
D sp3d , trigonal bipyramidal

The correct answer is:
dsp2 , square planar

Solution:
Wilkinson's catalyst is [(Ph3P)3RhCl] . In this complex central metal ion Rh is dsp2 -hybridised giving a square planar complex.

Topic: Chemistry, Coordination Compounds, NEET
The hybridisation of P in PO43- is the same as in

Options:
A I in ICl4-
B S in SO3
C N in NO3-
D S in SO42-

The correct answer is:
S in SO42-

Solution:
Both PO43- and SO42- have sp3 hybridisation for central atoms as hybrid value is 4 as there are 4 bond pairs in both P and S.

Topic: Chemistry, Chemical Bonding and Molecular Structure, NEET
The hybridization involved in complex NiCN42- is: (Atomic number of Ni = 28)

Options:
A dsp2
B sp3
C d2sp2
D d2sp3

The correct answer is:
dsp2

Solution:
NiCN42-
Oxidation state of Ni is +2
x-4=2
x=+2

Now, Ni2+=[Ar] 3d8 4s°

therefore, CN- is a strong field ligand. Hence, all unpaired electrons are paired up.

therefore, hybridisation of Ni(CN)42- is dsp2

Topic: Chemistry, Coordination Compounds, NEET, NEET 2015 (Phase 2)
The hybridization of atomic orbitals of nitrogen in NO2+, NO3- and NH4+ respectively are

Options:
A sp, sp2 and sp2
B sp2, sp3 and sp
C sp, sp2 and sp3
D sp2, sp and sp3

The correct answer is:
sp, sp2 and sp3

Solution:
They have linear, trigonal planer and tetrahedral structure respectively.

Topic: Chemistry, Chemical Bonding and Molecular Structure, NEET, NEET 2016 (Phase 2)
The hybridization states of the Ni atom among [Ni(CO)4],[Ni(CN)4]2-,[NiCl4]2- species are respectively (At. no. of Ni = 28)

Options:
A sp3,sp3,dsp2
B dsp2,sp3,sp3
C sp3,dsp2,sp3
D sp3,dsp2,dsp2

The correct answer is:
sp3,dsp2,sp3

Solution:

Topic: Chemistry, Coordination Compounds, NEET
The hydration energy of Mg2+ is larger than that of

Options:
A Al3+
B Na+
C Be2+
D K +

The correct answer is:
Na+

Solution:
The charge/radius ratio of Mg2+ is larger than that of Na+ , but smaller than those of Be2+ , Mg3+ and Al3+ . Therefore, the hydration energy of Mg2+ is higher than that of Na+ .

Topic: Chemistry, s Block Elements, NEET
The hydrocarbon (molecular mass = 70) after reduction and chlorination gives a single monochloride. The hydrocarbon is

Options:
A pent-1-ene
B pent-2-ene
C 1,1-dimethylcycloprop-1-ene
D cyclopentane

The correct answer is:
pent-1-ene

Solution:
The hydrocarbon can be either an alkene or cycloalkane. No alkene with five carbons has all equivalent hydrogens and so the compound is non-substituted cycloalkane, i.e., cyclopentane and monochloride is chlorocylopentane.

Topic: Chemistry, Hydrocarbons, NEET
The hydrogen ion concentration in 0.2 M ethanoic acid (Ka=2Ã10-5 mol dm-3) is

Options:
A 2×10-2
B 2×10-4
C 2×10-3
D 2×10-5

The correct answer is:
2×10-3

Solution:
For weak acid
H+=Ka.C
=2×10-5×0.2
=2×10-3

Topic: Chemistry, Ionic Equilibrium, NEET
The hydrogen ion concentration of a $10^{-8}$ $\mathrm{M} \mathrm{HCl}$ aqueous solution at $298 \mathrm{~K}\left(\mathrm{~K}_w=\right.$ $\left.10^{-14}\right)$ is:

Options:
A $1.0 \times 10^{-8} \mathrm{M}$
B $1.0 \times 10^{-6} \mathrm{M}$
C $1.0525 \times 10^{-7} \mathrm{M}$
D $9.525 \times 10^{-8} \mathrm{M}$

The correct answer is:
$1.0525 \times 10^{-7} \mathrm{M}$

Solution:
$\left[\mathrm{H}^{+}\right]=10^{-8} \mathrm{M}$
Due to dilute solution.
$$
\begin{aligned}
{\left[\mathrm{H}^{+}\right] } & =10^{-8}+10^{-7} \mathrm{M} \\
& =10^{-7}[0.1+1] \mathrm{M} \\
& =1.1 \times 10^{-7} \mathrm{M} \\
& =1.1 \times 10^{-7} \mathrm{M}
\end{aligned}
$$
Caution
In an aqueous solution of $10^{-8} \mathrm{M} \mathrm{HCl},\left[\mathrm{H}^{+}\right]$ is based on the concentration of $\mathrm{H}^{+}$ions of $10^{-8} \mathrm{M} \mathrm{HCl}$ and the concentration of $\mathrm{H}^{+}$ions of water.

Topic: Chemistry, Ionic Equilibrium, NEET, NEET 2006
The hydrolysis of 1 mol of chloroform requires

Options:
A 1 mol of KOH
B 2 mol of KOH
C 3 mol of KOH
D 4 mol of KOH

The correct answer is:
4 mol of KOH

Solution:
The hydrolysis of 1 mol of chloroform requires 4 mol of KOH as follows

Topic: Chemistry, Carboxylic Acid Derivatives, NEET
The hydrolysis of NCl3 by water produces

Options:
A NH2NH2 and HOCl
B NH2OH and HOCl
C NH2Cl and HOCl
D NH4OH and HOCl

The correct answer is:
NH4OH and HOCl

Solution:
The hydrolysis of NCl3 by water produces amonium hydroxide and hypochlorus acid
NCl 3 +4 H 2 O→ NH 4 OH+3HOCl

Topic: Chemistry, p Block Elements (Group 15, 16, 17 & 18), NEET
The hydrolysis reaction that takes place at the slowest rate, among the following is

Options:
A

B

C

D

The correct answer is:

Solution:
partial double bond character between $\mathrm{sp}^3$-hybridised $\mathrm{C}$ atom next to an aromatic ring and $\mathrm{Cl}$. It is most difficult to break this bond and hence it undergoes hydrolysis reaction with slowest rate.

Topic: Chemistry, Alcohols Phenols and Ethers, NEET, NEET 2019 (Odisha)
The hydroxides and carbonates of sodium and potassium are easily soluble in water while the corresponding salts of magnesium and calcium are sparingly soluble in water. What is the primary reason for this difference in solubility?

Options:
A Sodium and potassium ions have a higher charge density.
B Magnesium and calcium ions are smaller in size.
C Magnesium and calcium ions have a lower charge density.
D Sodium and potassium ions have a lower charge density.

The correct answer is:
Magnesium and calcium ions have a lower charge density.

Solution:
Correct Option is : (C)
Magnesium and calcium ions have a lower charge density.

Topic: Chemistry, s Block Elements, NEET