datavorous/entrance-exam-dataset huggingface dataset:
The ions $\mathrm{O}^{2-}, \mathrm{F}^{-}, \mathrm{Na}^{+}, \mathrm{Mg}^{2+}$ and $\mathrm{Al}^{3+}$ are isoelectronic. Their ionic radii show:

Options:
A a significant increase from $\mathrm{O}^{2-}$ to $\mathrm{Al}^{3+}$
B a significant decrease from $\mathrm{O}^{2-}$ to $\mathrm{Al}^{3+}$
C an increase from $\mathrm{O}^{2-}$ to $\mathrm{F}^{-}$and then decrease from $\mathrm{Na}^{+}$to $\mathrm{Al}^{3+}$
D a decrease from $\mathrm{O}^{2-}$ to $\mathrm{F}^{-}$and then increase from $\mathrm{Na}^{+}$to $\mathrm{Al}^{3+}$

The correct answer is:
a significant decrease from $\mathrm{O}^{2-}$ to $\mathrm{Al}^{3+}$

Solution:
Ionic radii decrease with the increase in charge on species.

Topic: Chemistry, Structure of Atom, NEET, NEET 2003
The iris of the eye is like an extension of

Options:
A retina
B cornea
C sclerotic
D choroid

The correct answer is:
choroid

Solution:
Human eye consists of three layers. The outer layer is a fibrous layer. It consists of posterior part Sclera which anteriorly forms Cornea. The middle layer is the vascular layer also known as uvea. It consists of a posterior part called a choroid that anteriorly forms a ciliary apparatus that further extends as iris. The iris is not continuous on both the sides and shows presence of a small opening known as pupil. The iris is responsible for the eye colour depending on the amount of melanin it contains. Thus it can be black or blue or green in humans. The innermost layer of the eye is the Retina.

Topic: Biology, Neural Control and Coordination, NEET
The ____ is a non-edible fungus.

Options:
A Agaricus
B Morels
C Buffles
D Toadstools

The correct answer is:
Toadstools

Solution:
Edible basidiomycete, Agaricus bisporus, commonly known as white mushroom, button mushroom is native to grasslands in Europe and North America. Many members like morels and buffles are edible and are considered delicacies. Toadstool is generally used to describe non-edible or poisonous mushroom.

Topic: Biology, Biological Classification, NEET
The __________ is an example of an ex situ conservation technique.

Options:
A sacred groves
B wildlife sanctuary
C seed bank
D biosphere reserves

The correct answer is:
seed bank

Solution:
In ex situ conservation, threatened animals and plants are taken out from their natural habitat and placed in special settings where they can be protected and given special care. Zoological park, botanical gardens, wildlife safari parks, seed banks are all methods of ex situ conservation.

Topic: Biology, Biodiversity and its Conservation, NEET
The ___________ is considered as age old cottage industry and ___________ is the its real product.

Options:
A beekeeping, honey
B beekeeping, beeswax
C fisheries, shagreen
D fisheries, isinglass

The correct answer is:
beekeeping, beeswax

Solution:
Beekeeping (apiculture) is the practice of managing honeybee colonies to attain desired objectives like honey production and crop pollination. Beeswax is considered as the real product of apiculture.

Topic: Biology, Strategies for Enhancement in Food Production, NEET
The ___ is the reproductive unit in the angiosperms.

Options:
A Flower
B Stem
C Leaf
D Roots

The correct answer is:
Flower

Solution:
The flower is the reproductive unit in the angiosperms.

Topic: Biology, Morphology of Flowering Plants, NEET
The IUPAC name is

Options:
A 1,1,1- trichloro -3,3- diphenyl propane
B 1,1- diphenyl -3,3,3- trichloro propane
C Both (A) and (B)
D None of these

The correct answer is:
1,1,1- trichloro -3,3- diphenyl propane

Solution:

Topic: Chemistry, Haloalkanes and Haloarenes, NEET
The IUPAC name of

Options:
A 4-Hydroxy-1-methylpentanal
B 4-Hydroxy-2-methylpent-2-en-1-al
C 2-Hydroxy-4-methylpent-3-en-5-al
D 2-Hydroxy-3-methylpent-2-en-5-al

The correct answer is:
4-Hydroxy-2-methylpent-2-en-1-al

Solution:
4-Hydroxy-2-methylpent-2-en-1-al

Topic: Chemistry, General Organic Chemistry, NEET
The IUPAC name of

Options:
A 2,3-dimethylpentanoyl chloride
B 3,4-dimethylpentanoyl chloride
C 1-chloro-1-oxo-2,3-dimethylpentane
D 2-ethyl-3-methylbutanoyl chloride

The correct answer is:
2,3-dimethylpentanoyl chloride

Solution:
2, 3 - dimenthyl pentanoyl chloride
Caution
According to IUPAC, the name of the compound is written out with the substituents in alphabetical order followed by the base name (derived from the number of carbons in the parent chain). Commas are used between numbers and dashes are used between letters and numbers. There are no spaces in the name.
Related Theory

Topic: Chemistry, General Organic Chemistry, NEET, NEET 2006
The IUPAC name of an element with atomic number 119 is

Options:
A unnilennium
B unununnium
C ununoctium
D ununennium

The correct answer is:
ununennium

Solution:
According to IUPAC nomenclature, an element with atomic number of 119 is ununennium. Hence option 4 is correct.

"un" is used for number 1. "enn" is used for number 9 and at the end ium is added.

Topic: Chemistry, Classification of Elements and Periodicity in Properties, NEET, NEET 2022 (Phase 1)
The IUPAC name of CH3-CH=CH-C≡CH is

Options:
A Pent – 3-en-1-yne
B Pent-2-en-3-yne
C Pent-3-en-4-yne
D Pent-2-en-4-yne

The correct answer is:
Pent – 3-en-1-yne

Solution:
Using IUPAC rules this compound can be named as
C 5 H 3 − C 4 H= C 3 H− C 2 ≡ C 1 H Pent−3−en−1−yne
As here triple bond is at corner, so it is preferred over double bond for numbering.

Topic: Chemistry, Hydrocarbons, NEET
The IUPAC name of [Co(NH3)4Cl(NO2)]Cl is

Options:
A tetraamminechloridonitrito-N-cobalt (III) chloride
B tetraamminechloridonitritocobalt (II) chloride
C tetraamminechloridonitritocobalt (I) chloride
D tetraamminechloridonitritocobalt (III) chloride

The correct answer is:
tetraamminechloridonitrito-N-cobalt (III) chloride

Solution:
The IUPAC name of [Co(NH3)4Cl(NO2)]Cl is tetraaminechloridonitrito-N-cobalt (III) chloride

Topic: Chemistry, Coordination Compounds, NEET
The IUPAC name of complex K3[AlC2O4)3 is

Options:
A potassiumaluminoxalate
B potassiumtrioxalatoaluminate(III)
C potassiumaluminium(III)oxalate
D potassiumtrioxalatoaluminate(VI)

The correct answer is:
potassiumtrioxalatoaluminate(III)

Solution:
potassiumtrioxalatoaluminates(III)

Topic: Chemistry, Coordination Compounds, NEET
The IUPAC name of ethyl isobutyl ether is

Options:
A 1-ethoxy propane
B 1-ethoxy-2-methyl propane
C 1-ethoxy butane
D 2-methoxy butane

The correct answer is:
1-ethoxy-2-methyl propane

Solution:
The structure of ethyl isobutyl ether is

Topic: Chemistry, General Organic Chemistry, NEET
The IUPAC name of given compound is

Options:
A Butan -2- aldehyde
B 2- methylbutanal
C 3- methyl isobutyraldehyde
D 2- ethylpropanal

The correct answer is:
2- methylbutanal

Solution:
-CHO is a primary functional group with principle carbon chain containing four carbon atom.

Topic: Chemistry, Aldehydes and Ketones, NEET
The IUPAC name of is

Options:
A 4-ethoxycarbonylpent-3-enoic acid
B 4-ethanoyloxypent-3-enoic acid
C 3-ethoxycarbonylbut-2-enecarboxylic acid
D 3-ethoxycarbonylpent-3-enoic acid

The correct answer is:
4-ethoxycarbonylpent-3-enoic acid

Solution:

Topic: Chemistry, Carboxylic Acid Derivatives, NEET
The IUPAC name of is

Options:
A 2- chlorocarbonyl ethylbenzoate
B 2- carboxyethyl benzoyl chloride
C ethyl -2- (chlorocarbonyl) benzoate
D ethyl -1- (chlorocarbonyl) benzoate

The correct answer is:
ethyl -2- (chlorocarbonyl) benzoate

Solution:
Ester has higher priority than acid chloride hence
-COCl group is considered as prefix thus name of compound is ethyl -2- (chloro carbonyl) benzoate.

Topic: Chemistry, General Organic Chemistry, NEET
The IUPAC name of is

Options:
A 2-Chlorocarbonyl ethylbenzoate
B 2-Carboxyethyl benzoyl chloride
C Ethyl-2-(chlorocarbonyl) benzoate
D Ethyl-1-(chlorocabonyl) benzoate

The correct answer is:
Ethyl-2-(chlorocarbonyl) benzoate

Solution:
Ethyl-2-(chlorocarbonyl) benzoate

Topic: Chemistry, Carboxylic Acid Derivatives, NEET
The IUPAC name of is

Options:
A 4-carbamoylpent-3-enoic acid
B 4- amido-4-methyl-but-3-enoic acid
C 3- amido-but-2-enecarboxylic acid
D 4-carboxy-2-methyl-but-2-enamide

The correct answer is:
4-carbamoylpent-3-enoic acid

Solution:

Topic: Chemistry, Carboxylic Acid Derivatives, NEET
The IUPAC name of is

Options:
A 2-chloropropane
B Chloropropane
C 1-chloropropane
D 2-chlorobutane

The correct answer is:
2-chloropropane

Solution:

Topic: Chemistry, Hydrocarbons, NEET
The IUPAC name of

is -

Options:
A 2, 2-Dimethyl-3-butene
B 2, 2-Dimethyl-4-pentene
C 3, 3-Dimethyl-1-butene
D 1-Hexene

The correct answer is:
3, 3-Dimethyl-1-butene

Solution:

Topic: Chemistry, General Organic Chemistry, NEET
The IUPAC name of the complex -

AgH2O2AgCN2 is

Options:
A diaquasilver(II) dicyanidoargentate(II)
B dicyanidosilver(I) diaquaargentate(I)
C diaquasilver(I) dicyanidoargentate(I)
D dicyanidosilver(II) diaquaargentate(II)

The correct answer is:
diaquasilver(I) dicyanidoargentate(I)

Solution:
The correct IUPAC name of the complex

AgH2O2AgCN2 is

diaquasilver(I) dicyanidoargentate(I)

Here both Ag atoms are in +1 oxidation state. water is neutral ligand and cynide is negative ligand.

Hence option 3 is correct.

Topic: Chemistry, Coordination Compounds, NEET, NEET 2022 (Phase 1)
The IUPAC name of the complex [Pt(NH3)2Cl(NH2CH3)]Br is

Options:
A Diamminechlorido(aminomethane)platinum(II)bromide
B Diammine(methanamine)chloridoplatinum(II)bromide
C Diamminechlorido(methanamine)platinum(II)bromide
D Bisammine(methanamine)chloridoplatinum(II)bromide

The correct answer is:
Diamminechlorido(methanamine)platinum(II)bromide

Solution:
[Pt(NH3)2Cl(NH2CH3)]Br
Let x be the oxidation number of Pt
x+0–1+0=+1
x=+2→Pt+2
Diamminechlorido(methanamine)platinum(II)bromide

Topic: Chemistry, Coordination Compounds, NEET
The IUPAC name of the compound having the formula $\mathrm{CH} \equiv \mathrm{C}-\mathrm{CH}=\mathrm{CH}_2$ is

Options:
A 3-butene-1-yne
B 1-butyn-3-ene
C but-1-yne-3-ene
D 1-butene-3-yne

The correct answer is:
1-butene-3-yne

Solution:
Double bond have preference over triple bond while naming $\stackrel{4}{\mathrm{C}} \mathrm{H} \equiv \stackrel{3}{\mathrm{C}}-\stackrel{2}{\mathrm{C}} \mathrm{H}=\stackrel{1}{\mathrm{CH}_2$ 1-butene-3-yne

Topic: Chemistry, General Organic Chemistry, NEET, NEET 2009 (Screening)
The IUPAC name of the compound having the formula is

Options:
A 3,3,3-Trimethyl-1-propene
B 1,1,1-Trimethyl-2-propene

C

3,3-Dimethyl-1-butene

D 2,2-Dimethyl-3-butene

The correct answer is:

3,3-Dimethyl-1-butene

Solution:
Double bond has preference over alkyl group hence

Topic: Chemistry, General Organic Chemistry, NEET
The IUPAC name of the compound is

Options:
A 5-formylhex-2-en-3-one
B 5-methyl-4-oxohex-2-en-5-al
C 3-keto-2-methylhex-5-enal
D 3-keto-2-methylhex-4-enal

The correct answer is:
3-keto-2-methylhex-4-enal

Solution:
3-oxo 2-methylhex 4-en-1-al

Topic: Chemistry, Aldehydes and Ketones, NEET
The IUPAC name of the compound, is

Options:
A 2-Methylpent-1-en-4-yne
B 4-Methylpent-4-en-1-yne
C 2-Methylpent-2-en-4-yne
D 4-Methylpent-2-en-1-yne

The correct answer is:
2-Methylpent-1-en-4-yne

Solution:

Topic: Chemistry, General Organic Chemistry, NEET
The IUPAC name of the compound

is ________.

Options:
A 3-Keto-2-methylhex-4-enal
B 5-Formylhex-2-en-3-one
C 5-Methyl-4-oxohex-2-en-5-al
D 3-Keto-2-methylhex-5-enal

The correct answer is:
3-Keto-2-methylhex-4-enal

Solution:
Aldehydes get higher priority over ketone and alkene in numbering of principal C-chain.
∴ 3-Keto-2-methylhex-4-enal

Topic: Chemistry, General Organic Chemistry, NEET, NEET 2017
The IUPAC name of the compound

is ________.

Options:
A 3-Keto-2-methylhex-4-enal
B 5-Formylhex-2-en-3-one
C 5-Methyl-4-oxohex-2-en-5-al
D 3-Keto-2-methylhex-5-enal

The correct answer is:
3-Keto-2-methylhex-4-enal

Solution:
Aldehydes get higher priority over ketone and alkene in numbering of principal C-chain.
â´ 3-Keto-2-methylhex-4-enal

Topic: Chemistry, General Organic Chemistry, NEET
The IUPAC name of the compound K 4 [Fe ( CN ) 6 ] is

Options:
A Potassium hexacyanoiron (II)
B Potassium hexacyanoferrate (III)
C Potassium hexacyanoferrate (II)
D Tripotassium hexacyanoiron (II)

The correct answer is:
Potassium hexacyanoferrate (II)

Solution:
The following rules are used while naming coordination compounds:
(i) The cation is named first both in positively and negatively charged coordination entities.

(ii) The ligands are named in an alphabetical order before the name of the central atom/ion.
(iii) Names of the anionic ligands ends in-o.
(iv) Prefixes mono, di, tri, etc. are used to indicate the number of ligands.
(v) Oxidation state of the metal is indicated by Roman numeral. The correct name is potassium hexacyanoferrate (II).

Topic: Chemistry, Coordination Compounds, NEET
The IUPAC name of the following compound is

Options:
A 5,6-diethyl-3-methyldec-4-ene
B 5,6-diethyl-8-methyldec-6-ene
C 5,6-dimethyl-8-methyldec-6-ene
D 5,6-dimethyl-3-methyl-4-ene

The correct answer is:
5,6-diethyl-3-methyldec-4-ene

Solution:
In bond line notations, bonds are represented by lines and line ends and line intersections denote carbon atoms. The structure of the compound is

Topic: Chemistry, Hydrocarbons, NEET
The IUPAC name of the following compound is

Options:
A 2, 8-dimethyl-3, 6-decadiene
B 1, 1, 7, 7-tetramethyl-2, 5-octadiene
C 2, 8-dimethyl-deca-4, 6-diene
D 3, 9-dimethyl-4, 6-decadiene

The correct answer is:
2, 8-dimethyl-deca-4, 6-diene

Solution:

Topic: Chemistry, General Organic Chemistry, NEET
The IUPAC name of the following compound is

Options:
A 5-methyl-hex-1-yne
B 4-methyl-hex-2-yne
C 3-methyl-hex-6-yne
D 2-methyl-hex-4-yne

The correct answer is:
5-methyl-hex-1-yne

Solution:
Name of a compound is 5-methyl-hex-1-yne

Topic: Chemistry, General Organic Chemistry, NEET
The IUPAC name of the given compound

Options:
A 5, 6-Diethyl-3-methyl-4-decene
B 7-Methyl-2, 4, 6-trieneoctanal
C 6-Methylheptene
D 3, 3-Diethyl-5-ethyl-4-decene

The correct answer is:
5, 6-Diethyl-3-methyl-4-decene

Solution:

Topic: Chemistry, General Organic Chemistry, NEET
The IUPAC name of Wilkinson's catalyst is

Options:
A chlorido tris (triphenyl phosphine) rhodium (I)
B chlorido tris (triphenyl phosphone) rhodium (IV)
C chlorido tris (triphenyl phosphine) rhodium (0)
D chlorido tris (triphenyl phosphine) rhodium (VI)

The correct answer is:
chlorido tris (triphenyl phosphine) rhodium (I)

Solution:
Wilkinson's catalyst is [Rh(PPh3)3Cl] and can be named as
chlorido tris (triphenyl phosphine) rhodium (I).

Topic: Chemistry, Coordination Compounds, NEET
The IUPAC name of

Options:
A 1-Chloro-2-nitro-4-methyl benzene
B 1-Chloro-4-methyl-2-nitrobenzene
C 2-Chloro-1-nitro-5-methyl benzene
D m-Nitro-p-chlorotoluene

The correct answer is:
1-Chloro-4-methyl-2-nitrobenzene

Solution:
1-Chloro-4-methyl-2-nitrobenzene

Topic: Chemistry, General Organic Chemistry, NEET
The I-V characteristics shown above are exhibited by a

Options:
A Light emitting diode
B Zener diode
C Photodiode
D Solar cell

The correct answer is:
Solar cell

Solution:
The I-V characteristics of solar cell is

Topic: Physics, Semiconductors, NEET, NEET 2024 (Re-NEET)
The joint between carpals is:

Options:
A Fibrous
B Cartilagenous
C Gliding
D Hinge

The correct answer is:
Gliding

Solution:
The joint present between the carpals is an example of gliding joint.
The elbow joint is an example of hinge joint.
Fibrous joints are the ones which do not allow any movement. Eg: the joint between flat bones of skull
Cartilagenous joints are the ones which allow limited movement. Eg: the joint between adjacent vertebrae.

Topic: Biology, Locomotion and Movement, NEET
The joint between the atlas and axis is an example of

Options:
A Pivot joint
B Ball and socket joint
C Hinge joint
D Gliding joint

The correct answer is:
Pivot joint

Solution:
The joint between atlas (the first cervical vertebra) and axis (the second cervical vertebra) a synovial joint. It is a type of pivot joint. The odontoid process of axis acts as a pivot on which atlas can rotate. This type of joint allows considerable amount of movement. A fluid filled synovial cavity is present between the articulating surfaces of two bones.

Topic: Biology, Locomotion and Movement, NEET
The joint found between the sternum and the ribs in humans are:

Options:
A Saddle joint
B Fibrous joint
C Cartilaginous joint
D Gliding joint

The correct answer is:
Cartilaginous joint

Solution:
In cartilaginous joints, the bones involved are joined together with
the help of cartilages. The joint between the adjacent vertebrae in the vertebral column is of this pattern and it permits limited movements. Between ribs and sternum, the cartilage is called hyaline cartilage.

Topic: Biology, Locomotion and Movement, NEET
The joint of radio-ulna with the upper arm is called a

Options:
A Hinge joint
B Pivot joint
C Socket joint
D None of these

The correct answer is:
Hinge joint

Solution:
Hing joint produces an angular opening and closing motion like that of a hinged door, e.g., knee, elbow and interphalangeal joints.

Topic: Biology, Locomotion and Movement, NEET
The junction between ovule and funiculus is called the

Options:
A placenta
B hilum
C raphe
D chalaza

The correct answer is:
hilum

Solution:
The ovule of the ovary is attached to the placenta by a slender stalk called funicle. The point of attachment of body of ovule to the funicle is known as hilum. In an inverted ovule, the funicle extends beyond the hilum alongside the ovule forming a sort of ridge. This extended part is called raphe.

Topic: Biology, Sexual Reproduction in Flowering Plants, NEET
The Ksp for the following dissociation is 1.6×10-5 PbCl2(s)⇌Pb(aq)2++2Cl(aq)-
Which of the following choices is correct for a mixture of 300 mL 0.134 M Pb(NO3)2 and 100 mL 0.4M NaCl?

Options:
A Q<Ksp
B Q>Ksp
C Q=Ksp
D Not enough data provided

The correct answer is:
Q>Ksp

Solution:
Q= Pb 2+ Cl − 2
=300Ã0.134400100Ã0.44002=3Ã0.1344(0.1)2
Q=1.005Ã10-3
Hence, Q>Ksp

Topic: Chemistry, Ionic Equilibrium, NEET
The Ksp for X2SO4 at 25° C ( X+ is a monovalent ion) is 3.2 ×10-5 . The maximum concentration of X+ that could be attained in a saturated solution of this solid at 25° C is

Options:
A 4Ã10-2 M
B 2.89Ã10-4 M
C 3Ã10-3 M
D 6Ã10-2 M

The correct answer is:
4Ã10-2 M

Solution:
X2SO4⇌2X++SO42-
Ksp=(2S)2×S=4S3
4S3=3.2×10-5
or S3=8×10-6
S=2×10-2 .
x + =2S
=2×2× 10 −2 =4× 10 −2

Topic: Chemistry, Ionic Equilibrium, NEET
The Ksp of Ag2CrO4 , AgCl, AgBr and AgI are respectively, 1.1×10-12 , 1.8×10-10 , 5.0×10-13 , 8.3×10-17 . Which one of the following salts will precipitate last if AgNO3 solution is added to the solution containing equal moles of NaCl, NaBr, NaI and Na2CrO4 ?

Options:
A AgI
B AgCl
C Ag2CrO4
D AgBr

The correct answer is:
Ag2CrO4

Solution:
Ag2CrO411-s→2Ag+02s+CrO4-20s
Ksp=(2s)2s1-s
s<<1
As 1 >> s so 1 – s = 1
Ksp=4s3
=1.1×10-12=4s3
=s=6.5×10-5
AgCl→Ag+s+Cl-s
1.8×10-10=s2
or s=1.34×10-5
Similarly 's' for AgBr and AgCl is found to be 7.1×10-7 and 9×10-9 respectively since solubility of Ag2CrO4 is highest, so it will participate last.

Topic: Chemistry, Ionic Equilibrium, NEET
The Ksp of Ag2CrO4 is 1.1Ã10-12 at 0.1 K. The solubility (in mol/L) of Ag2CrO4 in a 0.1 M AgNO3 solution is

Options:
A 1.1×10-11
B 1.1×10-10
C 1.1×10-12
D 1.1×10-9

The correct answer is:
1.1×10-10

Solution:
Ag 2 CrO 4 s ⇌ 2 Ag + aq 2s+0.1 + CrO 4 2− aq s
Ksp=(0.1)2s=1.1Ã10-12
s=1.1Ã10-10M

Topic: Chemistry, Ionic Equilibrium, NEET
The Ksp of MgOH2 is 1 Ã 10â12. 0.01 M MgOH2 will precipitate at the limiting pH -

Options:
A 3
B 9
C 5
D 8

The correct answer is:
9

Solution:
[ M g 2+ ] [ O H â ] 2 = 10 â12
0.01Ã [ O H â ] 2 = 10 â12
OHâ=10â5 M
â´H+ =10â9 M and pH=â logâ¡10â9 =9

Topic: Chemistry, Ionic Equilibrium, NEET
The Ksp of Ag2CrO4, AgCl, AgBr and AgI are respectively, 1.1×10-12 , 1.8×10-10 , 5.0×10-13 , 8.3×10-17 . Which one of the following salts will precipitate last if AgNO3 solution is added to the solution containing equal moles of NaCl, NaI, NaBr and Na2CrO4 ?

Options:
A AgI
B AgCl
C AgBr
D Ag2CrO4

The correct answer is:
Ag2CrO4

Solution:
For, Ag 2 CrO 4 ⇌ 2Ag + +CrO 4 2-
solubility product
K sp = ( 25 ) 2 ×5=4s 3
K sp =( 1.1× 10 −12 )
S=3 K sp 4 =0.65× 10 −4
For, AgCl⇌ Ag + +Cl -
K sp =S×S ( K sp =1.8× 10 −10 )
S= K sp =1.34× 10 −5
For, AgBr⇌ Ag + +Br -
K sp =S×S ( K sp =5×10 -13 )
S= K sp =0.71× 10 −6
For, AgI⇌ Ag + +I -
K sp =S×S ( K sp =8 .3×10 -17 )
S= K sp =0.9× 10 −8
therefore, the solubility of A g 2 Cr O 4 is highest so it is precipitate last.

Topic: Chemistry, Ionic Equilibrium, NEET, NEET 2015 (Phase 1)
The Kâ¡ Î± X-ray emission line of tungsten occurs at Î» = 0. 0 21 nm. The energy difference between K and L levels in this atom is about

Options:
A 0 . 5 1 MeV
B 1. 2 MeV
C 5 9 keV
D 1 3 . 6 eV

The correct answer is:
5 9 keV

Solution:
Î»kâ¡Î±=0.021 nm=0.21Aâ
Since, Î» kâ¡ Î± corresponds to the transition of an electron from L-shell to K-shell, therefore
Eâ¡Lâ¡-Eâ¡Kâ¡=in eV=12375Î»in Aâ=123750.21â58928 eV
or ÎE = 59 keV

Topic: Physics, Atomic Physics, NEET
The kangaroo rat of North American desert is capable of meeting all its water requirements by

Options:
A Internal fat oxidation
B Ability to concentrate its urine
C Are insensitive to heat
D Both A and B

The correct answer is:
Both A and B

Solution:
Kangaroo rat is a xeric animal and lives in dry habitat, to meets its water requirement. It carries out internal fat oxidation liberating large amount of metabolic water which is used in other physiological process. It also concentrate its urine to minimize water loss.

Topic: Biology, Organisms and Populations, NEET
The key step in cannizzaro's reaction is the intermolecular shift of

Options:
A Proton
B Hydride ion
C Hydronium ion
D Methyl group

The correct answer is:
Hydride ion

Solution:
Cannizzaro's reaction is an example of hydride ion (H-) transfer reaction.

Topic: Chemistry, Carboxylic Acid Derivatives, NEET
The kind of epithelium which forms the inner walls of blood vessels is

Options:
A cuboidal epithelium
B columnar epithelium
C ciliated columnar epithelium
D squamous epithelium

The correct answer is:
squamous epithelium

Solution:
Simple squamous epithelium consists of only one layer of flat, scale like cells usually polygonal cells, which are closely fitted together like the tiles of a mosaic. It is also known as pavement epithelium. It forms lining of blood vessels, lymph vessels, heart, peritoneum, pleura, Bowman's capsule, etc.

Topic: Biology, Structural Organisation in Animals, NEET, NEET 2010 (Screening)
The kind of evolution in which two species of different genealogy come to resemble one another closely is termed as

Options:
A Progressive evolution
B Convergent evolution
C Parallel evolution
D Regressive evolution

The correct answer is:
Convergent evolution

Solution:
Progressive evolution is the development of organisms with more elaborate and specialized structures from those having less elaborate features e.g. amphibians from reptiles. Regressive or degenerative evolution is development of simpler forms from more complex ones. Such evolution has occurred in case of vestigial organs, parasitic forms, and in the reduction of over specialized structures such as wings in flightless birds. Parallel evolution is the formation of similar trains in related groups of organisms independently due to similar requirement e.g. running of two toed deer and one toed Horse. The kind of evolution in which two species of different genealogy (a line of descent traced continuously from an ancestor) come to resemble one another closely is termed as convergent evolution. Evolution of wings in insects and birds serve as example of convergent evolution

Topic: Biology, Evolution, NEET