NEET-UG 2019 Question Paper — Set 2

The main scale of a vernier callipers has n divisions/cm. n divisions of the vernier scale coincide with (n−1) divisions of main scale. The least count of the vernier callipers is,

A person travelling in a straight line moves with a constant velocity v₁, for certain distance 'x' and with a constant velocity v₂ for next equal distance x. The average velocity v is given by the relation

A body of mass m is kept on a rough horizontal surface (coefficient of friction = α). A horizontal force is applied on the body, but it does not move. The resultant of normal reaction and the frictional force acting on the object is given by F, where F is,

An object of mass 500 g, initially at rest, is acted upon by a variable force whose X-component varies with X in the manner shown. The velocities of the object at the points X
= 8 m and X = 12 m, would have the respective values of (nearly)

An object flying in air with velocity (20î +25ĵ −12k̂) suddenly breaks into two pieces whose masses are in the ratio 1 : 5. The smaller mass flies off with a velocity (100î +35ĵ +8k̂). The velocity of the larger piece will be

Two bullets are fired horizontally simultaneously towards each other from roof tops of two buildings 100 m apart of same height of 200 m, with the same velocity of 25 m/s. When and where will the two bullets collide? (g = 10 m/s²)

A particle of mass 5 m at rest suddenly breaks on its own into three fragments. Two fragments of mass m each move along mutually perpendicular direction with speed v each. The energy released during the process is,

A particle starting from rest, moves in a circle of radius 'r'. It attains a velocity of V₀ m/s in the nᵗʰ round. Its angular acceleration will be,

A solid cylinder of mass 2 kg and radius 50 cm rolls up an inclined plane of angle of inclination 30°. The centre of mass of the cylinder has speed of 4 m/s. The distance travelled by the cylinder on the inclined surface will be, [take g = 10 m/s²]

Assuming that the gravitational potential energy of an object at infinity is zero, the change in potential energy (final – initial) of an object of mass m, when taken to a height h from the surface of earth (of radius R), is given by,

The time period of a geostationary satellite is 24 h, at a height 6R_E (R_E is radius of earth) from surface of earth. The time period of another satellite whose height is 2.5R_E from surface will be,

The stress-strain curves are drawn for two different materials X and Y. It is observed that the ultimate strength point and the fracture point are close to each other for material X but are far apart for material Y. We can say that materials X and Y are likely to be (respectively),

In a u-tube as shown in the fig. water and oil are in the left side and right side of the tube respectively. The heights from the bottom of water and oil columns are 15 cm and 20 cm respectively. The density of the oil is

[take π water =1000kg/m³]

Two small spherical metal balls, having equal masses, and made from materials of densities ρ₁ and ρ₂ (ρ₁ = 8ρ₂) and have radii of 1 mm and 2 mm respectively, they are made to fall vertically (from rest) in a viscous medium whose coefficient of viscosity equals η and whose density is 0.1ρ₂. The ratio of their terminal velocities would be,

A deep rectangular pond of surface area A, containing water (density = ρ), specific heat (capacity = s), is located in a region where the outside air temperature is at a steady value of –26°C. The thickness of the frozen ice layer in this pond, at a certain instant is x. Taking the thermal conductivity of ice as K, and its specific latent heat of fusion as L, the rate of increase of the thickness of ice layer, at this instant, would be given by

An object kept in a large room having air temperature of 25°C takes 12 minutes to cool from 80°C to 70°C. The time taken to cool for the same object from 70°C to 60°C would be nearly.

1 g of water, of volume 1 cm³ at 100°C, is converted into steam at same temperature under normal atmospheric pressure (>> 1 × 10⁵ Pa). The volume of steam formed equals 1671 cm³. If the specific latent heat of vaporisation of water is 2256 J/g, the change in internal energy is,

The value of γ = (Cₚ /Cᵥ), for hydrogen, helium and another ideal diatomic gas X (whose molecules are not rigid but have an additional vibrational mode), are respectively equal to,

The distance covered by a particle undergoing SHM in one time period is (amplitude = A),

A truck is stationary and has a bob suspended by a light string, in a frame attached to the truck. The truck suddenly moves to the right with an acceleration of a. The pendulum will tilt

A mass falls from a height ‘h’ and its time of fall ‘t’ is recorded in terms of time period T of a simple pendulum on the surface of earth it is found that t = 2T. The entire set up is taken to the surface of another planet. Some mass is half that of earth and radius the same. Same experiment is repeated and corresponding time noted as t′ and T′. Then we can say

A tuning fork having frequency 800 Hz produces resonance in a resonance column tube with upper end open and lower end closed by water surface. Successive resonance are observed at lengths 9.75 cm, 31.25 cm and 52.75 cm. The speed of sound in air is,

Two metal spheres, one of radius R and the other of radius 2R respectively have the same charge density. They are brought in contact and separated. What will be the new surface charge densities on them?

A sphere encloses an electric flux with magnitude ± 3 × 10⁻⁶ C. What is the total electric flux across the sphere?

Two identical capacitors C₁ and C₂ of equal capacitance are connected as shown in the circuit. Terminals a and b are on the key k are connected to charge capacitor C₁ using battery of emf V volt. Now disconnecting a and b the terminals a and b are connected. Due to this, will be the percentage loss of energy?

The reading of an ideal voltmeter in the circuit shown is,

The metre bridge shown is in balance position with P/Q= l₁/l₂. If we now interchange the position of galvanometer and cell, will the bridge work? If yes, what will be balance condition?

Two toroids 1 and 2 have total no. of turns 200 and 100 respectively with average radii 40 cm and 20 cm respectively. If they carry same current I, the ratio of the magnetic fields along the loops is,

A straight conductor carrying current i splits into two parts as shown in the figure. The radius of the circular loop is R. The total magnetic field at the centre P of the loop is,

The relations among the three components of earth’s magnetic field, namely horizontal component H, vertical component V and dip δ are, (B_E = total magnetic field)

The variation of EMF with time for four types of generators are shown in the figures. Which amongst them can be called AC?

A cycle wheel of radius 0.5 m is rotated with constant angular velocity of 10 rad/s in a region of magnetic field of 0.1 T which is perpendicular to the plane of the wheel. The EMF generated between its centre and rim is

A circuit when connected to an AC source of 12 V gives a current of 0.2 A. The same circuit when connected to a DC source of 12 V, gives a current of 0.4 A. The circuit is

An equiconvex lens has power P. It is cut into two symmetrical halves by a plane containing the principal axis. The power of one part will be,

A double convex lens has focal length 25 cm. The radius of curvature of one of the surfaces is double of the other. Find the radii if the refractive index of the material of the lens is 1.5.

In a Young's double slit experiment, if there is no initial phase difference between the light from the two slits, a point on the screen corresponding to the fifth minimum has path difference

Angular width of the central maxima in the Fraunhofer diffraction for λ = 6000 Å is θ₀. When the same slit is illuminated by another monochromatic light, the angular width decreases by 30%. The wavelength of this light is,

A proton and an α-particle are accelerated from rest to the same energy. The de Broglie wavelengths λₚ and λα are in the ratio,

The work function of a photosensitive material is 4.0 eV. The longest wavelength of light that can cause photon emission from the substance is (approximately)

The radius of the first permitted Bohr orbit, for the electron in a hydrogen atom equals .51 Å and its ground state energy equals –13.6 eV. If the electron in the hydrogen atom is replaced by muon (μ⁻) [charge same as electron and mass 207 mₑ], the first Bohr radius and ground state energy will be,

The rate of radioactive disintegration at an instant for a radioactive sample of half life 2.2 × 10⁹ s is 10¹⁰ s⁻¹. The number of radioactive atoms in that sample at that instant is,

An LED is made from a p-n junction diode using GaAsP. The energy gap is 1.9 eV. The wavelength of the light emitted will be equal to

An LED is made from a p-n junction diode using GaAsP. The energy gap is 1.9 eV. The wavelength of the light emitted will be equal to

The circuit diagram shown here corresponds to the logic gate

For a transparent medium of relative permeability and permittivity μᵣ and εᵣ are 1.0 and 1.44 respectively, the velocity of light in this medium would be

A person standing on the floor of an elevator drops a coin. The coin reaches the floor in time t₁, if the elevator at rest and in time t₂ if the elevator is moving uniformly. The which of the following option is correct?

In hydrogen atom, the de-Broglie wavelength of an electron in the second Bohr orbit is [Given that Bohr radius, a₀ = 52.9 pm]

Orbital having 3 angular nodes and 3 total nodes is

Match the oxide given in column A with its property given in column B

Which of the following options has all correct pairs?

Which of the following is the correct order of dipole moment?

Which of the following is paramagnetic?

The volume occupied by 1.8 g of water vapour at 374°C and 1 bar pressure will be
[Use R = 0.083 bar L K⁻¹ mol⁻¹]

A gas at 350 K and 15 bar has molar volume 20 percent smaller than that for an ideal gas under the same conditions. The correct option about the gas and its compressibility factor (Z) is:

An ideal gas expands isothermally from 10⁻³ m³ to 10⁻² m³ at 300 K against a constant pressure of 10⁵ Nm⁻². The work done on the gas is

Reversible expansion of an ideal gas under isothermal and adiabatic conditions are as shown in the figure.
AB → Isothermal expansion
AC → Adiabatic expansion
Which of the following options is not correct?

Reversible expansion of an ideal gas under isothermal and adiabatic conditions are as shown in the figure.
AB → Isothermal expansion
AC → Adiabatic expansion
Which of the following options is not correct?

The pH of 0.01 M NaOH(aq) solution will be

Which of the following cannot act both as Bronsted acid and as Bronsted base?

The molar solubility of CaF₂ [Kₛₚ = 5.3 × 10⁻¹¹] in 0.1 M solution of NaF will be

The oxidation state of Cr in CrO₆ is

The standard electrode potential (E°) values of Al³⁺/Al, Ag⁺/Ag, K⁺/K and Cr³⁺/Cr are −1.66 V, 0.80 V, −2.93 V and −0.74 V, respectively. The correct decreasing order of reducing power of the metal is

The number of hydrogen bonded water molecule(s) associated with CuSO₄·5H₂O is

Which of the alkali metal chloride (MCl) forms its dihydrate salt (MCl·2H₂O) easily?

Crude sodium chloride obtained by crystallisation of brine solution does not contain

Aluminium chloride in acidified aqueous solution forms a complex 'A', in which hybridisation state of Al is 'B'. What are 'A' and 'B', respectively?

Which of the following compounds is used in cosmetic surgery?

The most stable carbocation among the following is

The alkane that gives only one mono-chloro product on chlorination with Cl₂ in presence of diffused sunlight is

In the following reaction,
the number of sigma (σ) bonds present in the product A is

The liquefied gas that is used in dry cleaning along with a suitable detergent is

Formula of nickel oxide with metal deficiency defect in its crystal is Ni₀.₉₈O. The crystal contains Ni²⁺ and Ni³⁺ ions. The fraction of nickel existing as Ni²⁺ ions in the crystal is

The density of 2 M aqueous solution of NaOH is 1.28 g/cm³. The molality of the solution is [Given that molecular mass of NaOH = 40 g mol⁻¹]

Which of the following statements is correct regarding a solution of two components A and B exhibiting positive deviation from ideal behaviour?

In water saturated air, the mole fraction of water vapour is 0.02. If the total pressure of the saturated air is 1.2 atm, the partial pressure of dry air is

Following limiting molar conductivities are given as

λ°ₘ(H₂SO₄) = x S cm² mol⁻¹
λ°ₘ(K₂SO₄) = y S cm² mol⁻¹
λ°ₘ(CH₃COOK) = z S cm² mol⁻¹
λ°ₘ (in S cm² mol⁻¹) for CH₃COOH will be

A first order reaction has a rate constant of 2.303 × 10⁻³ s⁻¹. The time required for 40 g of this to reduce to 10 g will be
[Given that log₁₀2 = 0.3010]

For a reaction, according to Arrhenius equation, Eₐ = 0 and the rate constant at 200 K is 1.6 × 10⁶ s⁻¹. The rate constant at 400 K will be
[Given that gas constant, R = 8.314 JK⁻¹ mol⁻¹]

The correct option representing a Freundlich adsorption isotherm is

Identify the incorrect statement.

A compound 'X' upon reaction with H₂O produces a colourless gas 'Y' with rotten fish smell. Gas 'Y' is absorbed in a solution of CuSO₄ to give Cu₃P₂ as one of the products. Predict the compound 'X'.

Which of the following oxoacids of phosphorus has strongest reducing property?

Identify the correct formula of 'oleum' from the following.

Match the catalyst with the process.
Which of the following is the correct option?

The Crystal Field Stabilisation Energy (CFSE) for [CoCl₆]⁴⁻ is 18000 cm⁻¹. The CFSE for [CoCl₄]²⁻ will be

The hydrolysis reaction that takes place at the slowest rate, among the following is

When vapour of a secondary alcohol is passed over heated copper at 573 K, the product formed is

The major products C and D formed in the following reaction respectively are

The reaction that does not give benzoic acid as the major product is

The amine that reacts with Hinsberg's reagent to give an alkali insoluble product is

Which structure(s) of proteins remain(s) intact during denaturation process?

The polymer that is used as a substitute for wool in making commercial fibres is

The artificial sweetener stable at cooking temperature and does not provide calories is

A selectable marker is used to :

Western Ghats have a large number of plant and animal species that are not found anywhere else. Which of the following terms will you use to notify such species?

Which of the following statements about ozone is correct?

Exploration of molecular, genetic and species level diversity for novel products of economic importance is known as :

Which of the following is an innovative remedy for plastic waste?

Between which among the following, the relationship is not an example of commensalism?

If an agricultural field is liberally irrigated for a prolonged period of time, it is likely to face a problem of :

Which of the following statements about methanogens is not correct?

In mung bean, resistance to yellow mosaic virus and powdery mildew were brought about by :

Coca alkaloid or cocaine is obtained from :

Among the following pairs of microbes, which pair has both the microbes that can be used as biofertilisers?

Given below are four statements pertaining to separation of DNA fragments using Gel electrophoresis. Identify the correct statement.
(A) DNA is negatively charged molecule and so it is loaded on gel towards the Anode terminal.
(B) DNA fragments travel along the surface of the gel whose concentration does not affect movement of DNA.
(C) Smaller the size of DNA fragment, larger is the distance it travels through it.
(D) Pure DNA can be visualised directly by exposing to UV radiation.
Choose correct answer from the options given below :

An enzyme catalysing the removal of nucleotides from ends of DNA is :

In RNAi, the genes are silenced using :

Which is the most common type of embryo sac in angiosperms?

From the following, identify the correct combination of salient features of Genetic Code.

Which scientist experimentally proved that DNA is the sole genetic material in bacteriophage?

In the process of transcription in Eukaryotes, the RNA polymerase II transcribes :

In which genetic condition, each cell in the affected person has three sex chromosomes XXY?

What initiation and termination factors are involved in transcription in Eukaryotes?

Which of the following statements is correct about the origin and evolution of men?

The production of gametes by the parents, the formation of zygotes, the F₁ and F₂ plants, can be understood using

In Hatch and Slack pathway, the primary CO₂ acceptor is

Removal of shoot tips is a very useful technique to boost the production of tea leaves. This is because :

One scientist cultured Cladophora in a suspension of Azotobacter and illuminated the culture by splitting light through a prism. He observed that bacteria accumulated mainly in the region of :

In order to increase the yield of sugarcane crop, which of the following plant growth regulators should be sprayed?

What type of pollination takes place in Vallisneria?

In which one of the following, both autogamy and geitonogamy are prevented?

Match the placental types (column-I) with their examples (column-II).
Choose the correct answer from the following options:

Match the cell organelle in column I with column II.
Choose the right match from the options given below:

Prosthetic groups differ from co-enzymes in that-

Crossing over takes place between which chromatids and in which stage of the cell cycle?

"Ramachandran plot" is used to confirm the structure of

Which of the following is not a feature of active transport of solutes in plants?

Which of the following bacteria reduce nitrate in soil into nitrogen?

What will be the direction of flow of water when a plant cell is placed in a hypotonic solution?

Where is the respiratory electron transport system (ETS) located in plants?

Which of the following is against the rules of ICBN?

Mad cow disease in cattle is caused by an organism which has :

Which of the following statements is correct?

Match the organisms in column I with habitats in column II.
Select the correct answer from the options given below:

In the dicot root the vascular cambium originates from :

Which of the following shows whorled phyllotaxy?

Regeneration of damaged growing grass following grazing is largely due to :

Bicarpellary ovary with obliquely placed septum is seen in :

Select the incorrect statement regarding inbreeding.

A biocontrol agent to be a part of an integrated pest management should be :

Match the following enzymes with their functions:
Select the correct option from the following:

The two antibiotic resistance genes on vector pBR322 are for

Exploitation of bioresources of a nation by multinational companies without authorisation from the concerned country is referred to as

Carnivorous animals – lions and leopards, occupy the same niche but lions predate mostly larger animals and leopards take smaller ones. This mechanism of competition is referred to as

Decline in the population of Indian native fishes due to introduction of Clarias gariepinus in river Yamuna can be categorised as

Match the following RNA polymerases with their transcribed products:
Select the correct option from the following:

In a marriage between male with blood group A and female with blood group B, the progeny had either blood group AB or B. What could be the possible genotype of parents?

A population of a species invades a new area. Which of the following condition will lead to adaptive radiation?

Identify A, B and C in the diagrammatic representation of the mechanism of hormone action.
Select the correct option from the following:

Humans have acquired immune system that produces antibodies to neutralise pathogens. Still innate immune system is present at the time of birth because it

Select the correct sequence of events.

Which of the following hormones is responsible for both the milk ejection reflex and the foetal ejection reflex?

No new follicles develop in the luteal phase of the menstrual cycle because:

In Australia, marsupials and placental mammals have evolved to share many similar characteristics. This type of evolution may be referred to as

Match the items of Column-I with Column-II.
Select the correct option from the following:

What will be the sequence of mRNA produced by the following stretch of DNA?
3′ ACTGATGCATGCAG 5′ TEMPLATE STRAND
5′ TACTGATGCATGCAG 3′ CODING STRAND

Which of the following statements is not correct?

Match the following joints with the bones involved.

Select the correct option from the following:

Which of the following diseases is an autoimmune disorder?

Artificial light, extended work-time and reduced sleep-time disrupt the activity of

Which of the following is a correct statement?

Which of the following sexually transmitted diseases do not specifically affect reproductive organs?

Select the correct statement.

The maximum volume of air a person can breathe in after a forced expiration is known as:

All the components of the nodal tissue are autoexcitable. Why does the SA node act as the normal pacemaker?

A specialised nodal tissue embedded in the lower corner of the right atrium, close to Atrio-ventricular septum, delays the spreading of impulses to heart apex for about 0.1 sec. This delay allows

Match the following parts of a nephron with their function:
Select the correct option from the following:

Match the items in Column-I with those in Column-II.
Select the correct option from the following:

Which of the following receptors are specifically responsible for maintenance of balance of body and posture?

Which of the following cell organelles is present in the highest number in secretory cells?

Non-membranous nucleoplasmic structures in nucleus are the site for active synthesis of

Which of the following nucleic acids is present in an organism having 70 S ribosomes only?

After meiosis I, the resultant daughter cells have

Which of the following organic compounds is the main constituent of lecithin?

The main difference between active and passive transport across cell membrane is :

Match the items given in Column-I with those in Column-II and choose the correct option.

Match the following genera with their respective phylum.
Select the correct option:

Which of the following animals are true coelomates with bilateral symmetry?

The contrasting characters generally in a pair used for identification of animals in Taxonomic Key are referred to as :

Match the following cell structure with its characteristic feature:
Select correct option from the following:

Which of the following statements is INCORRECT?