datavorous/entrance-exam-dataset huggingface dataset:
What will be the linkage strength present between two genes A & B, which are 6 cM far from each other on a chromosome?

Options:
A 6%
B ≤50%
C 94%
D Data insufficient

The correct answer is:
94%

Solution:
The intergene distance on the chromosomes cannot be measured in the customary units employed in light microscopy; geneticists use an arbitrary unit to measure the map unit, to describe distances between linked genes. A map unit is equal to 1 per cent of crossovers (recombinants); that is, it represents the linear distance along the chromosome for which a recombination frequency of 1 per cent is observed. These distances can also be expressed in Morgan units; one Morgan unit represents 100 per cent crossing over. So here linkage strength is present between two genes A & B is 94%.(because they are 6 cM far from each other in a chromosome)

Topic: Biology, Principles of Inheritance and Variation, NEET
What will be the magnetic field at point P in the figure below?

Options:
A μ0i4R34
B μ0i4R2π+1
C μ0i2R2π+1
D 2μ0i2R2π+1

The correct answer is:
μ0i4R2π+1

Solution:
Field due to section 1
B→1=μ0i4πR upwards
field due to section 2
B→2=μ0iπ4πR=μ0i4R upwards
Field due to section 3
B→3=μ0i4πR upwards
therefore
B→net=B→1+B→2+B→3 upwards
B→net=μ0i4πR+μ0i4R+μ0i4πR upwards
B→net=μ0i4R2π+1 upwards

Topic: Physics, Magnetic Effects of Current, NEET
What will be the major product of the reaction given?

Options:
A
B
C
D

The correct answer is:

Solution:
Mechanism :

Topic: Chemistry, Alcohols Phenols and Ethers, NEET
What will be the mass of a non-volatile solute Molar mass = 40 g mol-1 which should be dissolved in 114 g octane to reduce its vapour pressure to 80% ?

Options:
A 10 g
B 4 g
C 2 g
D 16 g

The correct answer is:
10 g

Solution:
PÂ°-PsPs=nn
PÂ°-0.8PÂ°0.8P= x40114114
=0.2Po0.8 Po=x40
x=10 gram
Therefore, the mass of non-volatile solute is 10 gm.

Topic: Chemistry, Solutions, NEET
What will be the mass of one12C atom in g?

Options:
A 1.59×10−23g
B 0.99×10−23g
C 2.99×10−23g
D 1.99×10−23g

The correct answer is:
1.99×10−23g

Solution:
Correct Option is : (D)
1.99×10−23g

Topic: Chemistry, Some Basic Concepts of Chemistry, NEET
What will be the maximum speed of a car on a road-turn of radius 30 m if the coefficient of friction between the tyres and the road is 0.4? (Take g=9.8âmâsâ2)

Options:
A

10.84 m s−1

B

9.84 m s−1

C

8.84 m s−1

D

6.84 m s−1

The correct answer is:

10.84 m s−1

Solution:
Given

r=30âmââandââÎ¼=0.4.

v max = Î¼rg = 0.4Ã30Ã9.8 =10.84âmâ s â1

For a safe turn

M v 2 r â¤ Î¼ s âMg orâ v 2 â¤ Î¼ s ârg

where Î¼ s â coefficient of static friction

Topic: Physics, Laws of Motion, NEET
What will be the maximum speed of a car on a road-turn of radius 30 m, if the coefficient of friction between the tyres and the road is 0.4?

Options:
A 10.84 m s-1
B 9.84 m s-1
C 8.84 m s-1
D 6.84 m s-1

The correct answer is:
10.84 m s-1

Solution:
Maximum speed v=Î¼rg=0.4Ã30Ã9.8=10.84 m s-1

Topic: Physics, Laws of Motion, NEET
What will be the minimum pressure required to compress 500 dm3of air at 1 bar to 200 dm3at 30°C?

Options:
A 1.5 bar
B 3.5 bar
C 2.5 bar
D 0.5 bar

The correct answer is:
2.5 bar

Solution:
Correct Option is : (C)
2.5 bar

Topic: Chemistry, States of Matter, NEET
What will be the molar conductivity of Al3+ ions at infinite dilution if molar conductivity of Al2(SO4)3 is 858 S cm2mol-1 and ionic conductance of SO42- is 160 S cm2mol-1 at infinite dilution?

Options:
A 189 S cm2mol-1
B 698 S cm2mol-1
C 1018 S cm2mol-1
D 429 S cm2mol-1

The correct answer is:
189 S cm2mol-1

Solution:
ÎAl2(SO4)3o=2ÎAl3+o+3ÎSO42-o
ÎAl3+o=ÎAl2(SO4)3o-3ÎSO42-o2
=858-(3Ã160)2=189 S cm2mol-1

Topic: Chemistry, Electrochemistry, NEET
What will be the molecular formula of a polypeptide consisting of 10 glycine residues?

Options:
A C6H12ON5
B C20H32O11N10
C C30H16O6N10
D C20H30O12N10

The correct answer is:
C20H32O11N10

Solution:
The structure of amino acid glycine is as follows:

Thus the molecular formula for Glycine is C2H5O2N1 When 10 glycine molecules come together to form a polypeptide chain, 9 peptide bonds will be formed by the loss of 9 water molecules. Thus the molecular formula of the polypeptide will be C2H5O2N1×10-9H2O=C20H32O11N10

Topic: Chemistry, Biomolecules, NEET
What will be the molecular formula of the compound of an organic compound contains 49.3% carbon 6.84% hydrogen and rest is oxygen and its vapour density is 73.

Options:
A C3H5O2
B C6H10O4
C C3H10O2
D C4H10O2

The correct answer is:
C6H10O4

Solution:
Element	No.of moles	Simple ratio

C=12	49.312=4.1	4.12.7=1.5Ã2=3

H=1	6.841=6.84	6.842.7=2.5Ã2=5

O=16	43.8616=2.7	2.72.7=1Ã2=2

Empirical formula =C3H5O2
E.F.wt=12Â·3+1Â·5+16Â·2=73
Molecular wt=V.D.2 =73Ã2=146
n=M.wtE.F.wt=14673=2
Molecular formula = E.F n = C 3 H 5 O 2 = C 6 H 10 O 4

Topic: Chemistry, Some Basic Concepts of Chemistry, NEET
What will be the number of photons emitted per second by a 10 W sodium vapour lamp assuming that 90â% of the consumed energy is converted into light? Wavelength of sodium light is 590 nm , h=6.63Ã10-34 Js

Options:
A 1.67×1018
B 1.67×1020
C 2.67×1019
D 3.67×1023

The correct answer is:
2.67×1019

Solution:
Energy of photon
E=hcÎ»=6.63Ã10-34Ã3Ã108590Ã10-9=6.63Ã359Ã10-18
Light energy produced per second =90100Ã10=9W
â´ Number of photons emitted per sec
=9Ã596.63Ã3Ã10-18=2.67Ã1019

Topic: Physics, Dual Nature of Matter, NEET
What will be the pO2 of the atmosphere to facilitate inspiration?

Options:
A 116 mm Hg
B 159 mm Hg
C 104 mm Hg
D 95 mm Hg

The correct answer is:
159 mm Hg

Solution:
Transport of oxygen from the atmosphere to tissues and transport of carbon dioxide from tissues to the atmosphere is known as the exchange of gases. This occurs due to the partial pressure of gases, Boyle's law and due to this gases flow from high to low pressure. Partial pressure is pressure of one gas exerted in mixture of gases. Boyles's law (Pressure is inversely proportional to Volume when temperature is constant), is responsible for flow of gases. Oxygen enters the body from atmosphere and the partial pressure is 159mmHg.

Topic: Biology, Breathing and Exchange of Gases, NEET
What will be the percentage inheritance of a disorder from an X-linked diseased father to his son?

Options:
A 0%
B 25%
C 50%
D 100%

The correct answer is:
0%

Solution:
A father can transfer only the Y chromosome to his son and X chromosome to his daughter. If the father is a sufferer of X linked disorder than all his sons will be normal unless the mother is a carrier or sufferer.

Topic: Biology, Principles of Inheritance and Variation, NEET
What will be the ploidy of endosperm and zygote if the cross is made between a 6n female plant and a 4n male plant?

Options:
A 5n, 8n
B 8n, 5n
C 10n, 7n
D 6n, 4n

The correct answer is:
8n, 5n

Solution:
Endosperm is 3n (triploid) in nature and zygote is 2n (diploid) in nature.
So, for the given case, a plant with 6n makeup will produce a 3n gamete, and plant with 4n makeup will produce a 2n gamete.
A fusion between 3n and 2n gametes would produce a zygote of 5n makeup (3n+2n). And the endosperm would be of 8n makeup (3n+3n+2n).

Topic: Biology, Sexual Reproduction in Flowering Plants, NEET
What will be the pO2 and pCO2 in the atmospheric air compared to those in the alveolar air?

Options:
A pO2 lesser,pCO2 higher
B pO2 higher, pCO2 lesser
C pO2 higher, pCO2 higher
D pO2 lesser, pCO2 lesser

The correct answer is:
pO2 higher, pCO2 lesser

Solution:
the pO2 and pCO2 in the atmospheric air compared to those in the alveolar air will be pO2 higher, pCO2 lesser

Topic: Biology, Breathing and Exchange of Gases, NEET
What will be the pressure exerted by a mixture of 3.2 g of methane and 4.4 g of carbon dioxide contained in a 9 dm3flask at 27°C?

Options:
A 8.314×104Pa
B 8.657×104Pa
C 7.654×104Pa
D 6.857×104Pa

The correct answer is:
8.314×104Pa

Solution:
Correct Option is : (A)
8.314×104Pa

Topic: Chemistry, States of Matter, NEET
What will be the pressure of the gaseous mixture when 0.5 L of H2at 0.8 bar and 2.0 L of dioxygen at 0.7 bar are introduced in a 1L vessel at 27°C?

Options:
A 2.6 bar
B 1.6 bar
C 2.3 bar
D 1.8 bar

The correct answer is:
1.8 bar

Solution:
Correct Option is : (D)
1.8 bar

Topic: Chemistry, States of Matter, NEET
What will be the probability of genotype TTrr in F2 generation of a typical Mendelian dihybrid cross?

Options:
A 1/16
B 3/16
C 9/16
D 6/16

The correct answer is:
1/16

Solution:
Mendelian dihybrid cross occurs between two pair of contrasting characters - height of plant and shape of seed. When these are crossed in the F2 generation we get the following genotypes and their count:
TTRR - 1
TTRr - 2
TTrr - 1
TtRR - 2
TtRr - 4
Ttrr - 2
ttRR - 1
ttRr -2
ttrr - 1

Topic: Biology, Principles of Inheritance and Variation, NEET
What will be the product obtained as a result of the following reaction and why?

Options:
A Neo-Butylbenzene
B Isopropylbenzene
C Phenol
D Benzaldehyde

The correct answer is:
Isopropylbenzene

Solution:
Correct Option is : (B)
Isopropylbenzene

Topic: Chemistry, Hydrocarbons, NEET
What will be the product when an organic compound not containing any ring or tripple bond having molecular formula C 4 H 5 Cl undergo polymerisation?

Options:
A Duprene
B Natural rubber
C Buna-S
D Buna-N

The correct answer is:
Duprene

Solution:
This problem contains conceptual mixing of molecular structure determination and polymerisation of identified monomer. To solve this problem students are advised to follow following steps.
• Calculate the value of degree of unsaturation.
• Draw the possible structures.
• Choose the correct structure among all possible structures.
• Then, complete chemical reaction according to given information.
Determination of molecular structure of C 4 H 5 Cl
Degree of unsaturation = 4 + 1 - 6 2 = 5 - 3 = 2
Since this molecule does not contain any ring or triple bond hence it must be a diene.
A is chloroprene when it undergoes polymerisation it produces duprene also konwn as neoprene.
Chloroprene may undergo polymerisation via two moles either free radical polymerisation and Ziegler natta polymerisation.

Topic: Chemistry, Polymers, NEET
What will be the product when benzaldehyde is treated with NaOD in D2O ?

Options:
A C6H5CH2OD and C6H5COONa
B C6H5CH2OD and C6H5COOD
C C6H5CHDOD and C6H5COONa
D C6H5COOCHDC6H5

The correct answer is:
C6H5CH2OD and C6H5COONa

Solution:
Benzaldehyde on teatment with 50% aqueous or ethanolic alkali solution undergoes Cannizzaro reaction i.e., one molecule is oxidised and one is reduced.

Topic: Chemistry, Aldehydes and Ketones, NEET
What will be the ratio of the number of male gametes produced from one microspore mother cell to the number of female gametes produced from one megaspore mother cell in flowering plants?

Options:
A 4 :1
B 1 : 1
C 8 : 1
D 16 : 1

The correct answer is:
8 : 1

Solution:
One microspore mother cell will undergo meiosis to form 4 pollen grains. Each pollen grain will undergo two mitosis to form two male gametes. Thus the number of male gametes produced by one microspore mother cell is 8 . One megaspore mother cell will undergo meiosis to form 4 megaspore. Out of this three will degenerate and only one will be functional. This single functional megapore undergoes three free nuclear divisions to form a 7 celled, 8 nucleated embryo sac having only one ovum (female gamete). Thus the number of female gametes produced by one megaspore mother cell is 1.

Topic: Biology, Sexual Reproduction in Flowering Plants, NEET
What will be the result of the melting of polar ice caps and other places?

Options:
A Decreased sea level
B Stable sea level
C Increased sea level
D Decreased temperature

The correct answer is:
Increased sea level

Solution:
Over many years, the melting of polar ice caps and other places will result in a rise in sea level that can submerge many coastal areas.

Topic: Biology, Environmental Issues, NEET
What will be the root mean square speed of the molecules of a gas if the temperature is increased from 27 degrees Celsius to 127 degrees Celsius and the pressure is increased from 1.00 atm to 2.0 atm?

Options:
A 200/$\sqrt{3}$ m/s
B 100/$\sqrt{3}$ m/s
C 300/$\sqrt{3}$ m/s
D 400/$\sqrt{3}$ m/s

The correct answer is:
200/$\sqrt{3}$ m/s

Solution:
Correct Option is : (A)
200/$\sqrt{3}$ m/s

Topic: Chemistry, Kinetic Theory of Gases, NEET
What will be the sequence of mRNA produced by the following stretch of DNA?
3'ATGCATGCATGCATG5' TEMPLATE STRAND
5'TACGTACGTACGTAC3' CODING STRAND

Options:
A 3'-AUGCAUGCAUGCAUG 5'
B 5'-UACGUACGUACGUAC 3'
C 3'-UACGUACGUACGUAC 5'
D 5'-AUGCAUGCAUGCAUG 3'

The correct answer is:
5'-UACGUACGUACGUAC 3'

Solution:
The mRNA will be complementary to the DNA strand, but in RNA, uracil will be present in place of thymine. If the template strand is $3^{\prime}$ - A T G C A T G C A T G C A T G - 5 then the base sequence of mRNA for the given DNA strand will be $5^{\prime}-\mathrm{U} \mathrm{A} \mathrm{C}$ GUA A G U A C G U A C - 3'.

Topic: Biology, Molecular Basis of Inheritance, NEET, NEET 2019 (Odisha)
What will be the slope of the free surface of oil in a tanker when it starts accelerating at a rate of 'a' m/s²

Options:
A tan θ = a/g
B tan θ = g/a
C θ = a/g
D θ = g/a

The correct answer is:
tan θ = a/g

Solution:
Correct Option is : (A)
tan θ = a/g

Topic: Chemistry, Mechanical Properties of Fluids, NEET
What will be the speed of a transverse wave on a steel wire with a length of 12 m and a mass of 2.10 kg when a tension of 2.06 × 104N is applied?

Options:
A 343 m/s
B 256 m/s
C 431 m/s
D 505 m/s

The correct answer is:
343 m/s

Solution:
Correct Option is : (A)
343 m/s

Topic: Chemistry, Waves and Sound, NEET
What will be the speed of the trolley after the entire sandbag, initially weighing 25 kg, has completely emptied out through a hole on the floor at a rate of 0.05 kg/s, assuming the trolley continues to move uniformly on a frictionless track?

Options:
A 27 km/h
B 29.5 km/h
C 27.5 km/h
D 26.75 km/h

The correct answer is:
29.5 km/h

Solution:
Correct Option is : (B)
29.5 km/h

Topic: Chemistry, Work Power Energy, NEET
What will be the temperature at which a solution containing 6 g of glucose per 1000 g water will boil if molal elevation constant for water is 0.52 K kg mol-1.

Options:
A 1000.173°C
B 100.0173°C
C 100.173°C
D None

The correct answer is:
100.0173°C

Solution:
w=6g,W=1000 g, Mol. wt. of glucose = 180
ÎTb=1000ÃkbÃwmÃW
=1000Ã0.52Ã6180Ã1000=0.0173Â°C
Hence boiling point of solution = b.p. of water + ÎTb=100+0.0173
=100.0173Â°C

Topic: Chemistry, Solutions, NEET
What will be the total flux through the faces of the cube (Fig. 1.9) with a side of length 'a' if a charge 'q' is placed at a corner of the cube?

Options:
A q/8εo
B q/6εo
C q/12εo
D q/4εo

The correct answer is:
q/8εo

Solution:
Correct Option is : (A)
q/8εo

Topic: Chemistry, Electrostatics, NEET
What will be the total flux through the faces of the cube (Fig. 1.9) with a side of length 'a' if a charge 'q' is placed at centre of a face of the cube?

Options:
A q/8εo
B q/6εo
C q/2εo
D q/4εo

The correct answer is:
q/2εo

Solution:
Correct Option is : (C)
q/2εo

Topic: Chemistry, Electrostatics, NEET
What will be the total flux through the faces of the cube (Fig. 1.9) with a side of length 'a' if a charge 'q' is placed at mid-point of an edge of the cube?

Options:
A q/8εo
B q/6εo
C q/12εo
D q/4εo

The correct answer is:
q/4εo

Solution:
Correct Option is : (D)
q/4εo

Topic: Chemistry, Electrostatics, NEET
What will be the total flux through the faces of the cube (Fig. 1.9) with a side of length 'a' if a charge 'q' is placed at mid-point of B and C.?

Options:
A q/8εo
B q/6εo
C q/2εo
D q/4εo

The correct answer is:
q/2εo

Solution:
Correct Option is : (C)
q/2εo

Topic: Chemistry, Electrostatics, NEET
What will be the uncertainty in velocity of an electrons when the uncertainty in its positions is 1000Å ?

Options:
A 5.79âÃâ 10 2 â ms â1
B 5.79 ×  10 8   ms −1
C 5.79 ×  10 4   ms −1
D 5.79 ×  10 −10   ms −1

The correct answer is:
5.79 ×  10 2   ms −1

Solution:
Δx.mΔv=h4π
1000Å=1000×10-10m
or 10-7m
Δv=6.626×10-34Js4×3.14×9×10-31kg×10-7m
5.79 ×  10 2   ms −1

Topic: Chemistry, Structure of Atom, NEET
What will be the volume of the given mass of gas at 327°C if its volume at 27°C, 1 atm is 100 cc?

Options:
A 100 cc
B 200 cc
C 300 cc
D 400 cc

The correct answer is:
200 cc

Solution:
Correct Option is : (B)
200 cc

Topic: Chemistry, Kinetic Theory of Gases, NEET
What will be the wavelength of a ball of mass 0.1 kg moving with a velocity of 10 m s–1?

Options:
A 5.844 × 10–34m
B 7.456 × 10–34m
C 6.626 × 10–34m
D 8.436 × 10–34m

The correct answer is:
6.626 × 10–34m

Solution:
Correct Option is : (C)
6.626 × 10–34m

Topic: Chemistry, Structure of Atom, NEET
What will be the wavelength of an electron moving with 110th of velocity of light?

Options:
A 2.43×10-11m
B 243×10-11m
C 0.243m
D 2.43×10-4m

The correct answer is:
2.43×10-11m

Solution:
v=3×10810=3×107ms-1
λ=hmv=6.626×10-34Js9.1×10-31kg×3×107ms-1
=2.43×10-11m

Topic: Chemistry, Structure of Atom, NEET
What will be zero in a fully turgid cell?

Options:
A TP
B WP
C DPD
D OP

The correct answer is:
DPD

Solution:
when cell become turgid the osmotic pressure will become equal to the turgor pressure.So the DPD will be zero because DPD =OP-TP =TP-TP =0
So the correct answer is C.

Topic: Biology, Transport in Plants, NEET
What will happen if an aqueous solution of NaCl is subjected to electrolysis?

Options:
A Sodium metal will be deposited at the cathode and chlorine gas will be evolved at the anode.
B Hydrogen gas will be evolved at the cathode and oxygen gas will be evolved at the anode.
C Sodium ions will migrate towards the anode, while chloride ions will migrate towards the cathode.
D Sodium ions will migrate towards the cathode, while chloride ions will migrate towards the anode.

The correct answer is:
Hydrogen gas will be evolved at the cathode and oxygen gas will be evolved at the anode.

Solution:
Correct Option is : (B)
Hydrogen gas will be evolved at the cathode and oxygen gas will be evolved at the anode.

Topic: Chemistry, General Principles and Processes of Isolation of Metals, NEET
What will happen if ligaments are cut or broken?

Options:
A Bones will move freely at joints.
B No movement at joints.
C Bone will become unfix.
D Bone will become fixed.

The correct answer is:
Bone will become unfix.

Solution:
A ligament is the fibrous connective tissue that connects bones to other bones. If the ligaments are cut or broken, the bone will become unfixed.
Related THeory:-
Tendons are dense fibrous tissues that bind the muscles to the bone. They are responsible for the movement by transmitting the contraction force produced by the muscles to the bone they hold.
Ligaments allow the movement but up to a limit.

Topic: Biology, Locomotion and Movement, NEET, NEET 2002
What will happen if the secretion of parietal cells of gastric glands is blocked with an inhibitor?

Options:
A Gastric juice will be deficient in chymosin
B Gastric juice will be deficient in pepsinogen
C In the absence of HCl secretion, inactive pepsinogen is not converted into the active enzyme pepsin
D Enterokinase will not be released from the duodenal mucosa and so trypsinogen is not converted to trypsin

The correct answer is:
In the absence of HCl secretion, inactive pepsinogen is not converted into the active enzyme pepsin

Solution:
The oxyntic cells or parietal cells of the gastric glands secrete HCl. This HCl converts pepsinogen and prorennin to pepsin and rennin respectively.

Topic: Biology, Digestion and Absorption, NEET
What will happen if the stretch receptors of the urinary bladder wall are totally removed?

Options:
A Urine will not collect in the bladder
B Micturition will continue
C Urine will continue to collect normally in the bladder
D There will be no micturition

The correct answer is:
There will be no micturition

Solution:
The urinary bladder is a pear shaped, hollow muscular organ situated in the pelvic cavity, which is made up of smooth and involuntary muscles. The lumen of urinary bladder is lined by transition epithelium, which has great power of stretching. If stretch receptors of urinary bladder wall are totally removed, the urine will continue to collect normally in the bladder.

Topic: Biology, Excretory Products and their Elimination, NEET, NEET 2009 (Screening)
What will happen to the body of an adult man if the spleen is removed?

Options:
A WBC production will be lowered
B RBC production will be lowered
C Antibody production will be less
D Filtration of dead RBC will not be there

The correct answer is:
Filtration of dead RBC will not be there

Solution:
Spleen is the largest lymphatic organ. It is situated in the left side of abdomen region slightly above the stomach. It is considered as the 'blood bank' of the body. Histology of spleen shows presence of Red and White pulp. White pulp is associated with immune cells i.e. White blood cells. Red pulp consists of broken Red blood cells and also the breakdown products of Heamoglobin which is important as these gets metabolized to form bile pigments, urobilinogen, stercobilin etc. Hence Spleen is known as Graveyard of RBC. Red blood cells have a life span of about 120 days after which these die in the spleen. Splenic capillaries are smallest in diameter and thus when RBC's pass through them they die. Hence if Spleen is removed, this process will be hampered and also Haemoglobin metabolism will not take place.

Topic: Biology, Body Fluids and Circulation, NEET
What will happen to the volume of a bubble of air found underwater in a lake, where the temperature is 15 oC and the pressure is 1.5 atm, if the bubble then rises to the surface where the temperature is 25 oC and the pressure is 1.0 atm?

Options:
A Its volume will become greater by a factor of 2.4
B Its volume will become greater by a factor of 1.55
C Its volume will become greater by a factor of 1.2
D Its volume will become smaller by a factor of 0.80

The correct answer is:
Its volume will become greater by a factor of 1.55

Solution:
P1ViT1=P2VfT2
Vf=P1T2P2T1.Vf
Vi= volume of water bubble under water
Vf= volume of water bubble at the surface
Vf=1.5×298Vi1×288=447288Vi = 1.55 Vi
The volume becomes greater by a factor of 1.55.

Topic: Chemistry, States of Matter, NEET
What will happen when a block of copper metal is dropped into a beaker containing a solution of 1 M ZnSO4?

Options:
A The copper metal will dissolve with evolution of oxygen gas.
B The copper metal will dissolve with evolution of hydrogen gas.
C No reaction will occur.
D The copper metal will dissolve and zinc metal will be deposited.

The correct answer is:
No reaction will occur.

Solution:
Zn is above Cu in electrochemical series. So, Zn will reduce Cu2+ to Cu .
Cu + Zn2+ â No reaction
Displacement reaction is (feasible)
Cu2+ + Zn â Zn2+ + Cu â

Topic: Chemistry, Redox Reactions, NEET
What will you look for to identify the sex of the following?

Options:
A Female Ascaris - Sharply curved posterior end
B Male frog - A copulatory pad on the first digit of the hind limb
C Female cockroach - Anal cerci
D Male shark - Claspers borne on pelvic fins

The correct answer is:
Male shark - Claspers borne on pelvic fins

Solution:
A male shark possesses a pair of claspers which are inserted into a female shark's cloaca (an opening on the underside of the body) at the time of mating. Claspers are located on the inner edge of the pelvic fins near the male's cloaca. The function of claspers is to introduce purpose of fertilising her eggs. Female sharks do not have claspers.

Topic: Biology, Animal Kingdom, NEET
What will you look for to identity the sex of the following?

Options:
A Male frog - a copulatory pad on the first digit of the hind limb
B Female cock- - anal cerci roach
C Male shark - claspers borne on pelvic fins
D Female Ascaris - sharply curved posterior end

The correct answer is:
Male shark - claspers borne on pelvic fins

Solution:
A clasper is a male anatomical structure found in some groups of animals, and used in mating. Male cartilaginous fish like shark have claspers formed from the posterior portion of their pelvic fin which serves as intromittent organs used to channel semane into the female's cloaca during mating.

Topic: Biology, Principles of Inheritance and Variation, NEET, NEET 2011 (Screening)