NEET-UG 2017 Question Paper

A physical quantity of the dimensions of length that can be formed out of c, G and e²/4πϵ₀ [c is velocity of light, G is universal constant of gravitation and e is charge

Preeti reached the metro station and found that the escalator was not working. She walked up the stationary escalator in time t₁. On other days, if she remains stationary on the moving escalator, then the escalator takes her up in time t₂. The time taken by her to walk up on the moving escalator will be

The x and y coordinates of the particle at any time are
x = 5t − 2t² and y = 10t respectively, where x and y are in me

Two blocks A and B of masses 3m and m respectively are connected by a massless and inextensible string. The whole system is suspended by a massless spring as shown in figure. The magnitudes of acceleration of A and B immediately after the string is cut, are respectively:

One end of string of length l is connected to a particle of mass 'm' and the other end is connected to a small peg on a smooth horizontal table. If the particle moves in circle with speed 'v' then the net force on the particle (directed towards centre) will be (T represents the tension in the string):

Two discs of same moment of inertia rotating about their regular axis passing through centre and perpendicular to the plane of disc with angular velocities ω₁ and ω₂. They are brought into contact face to face coinciding the axis of rotation. The expression for loss of energy during this process is:

A rope is wound around a hollow cylinder of mass 3 kg and radius 40 cm. What is the angular acceleration of the cylinder if the rope is pulled with a force of 30 N?

Two astronauts are floating in gravitation free space after having lost contact with their spaceship. The two will

The acceleration due to gravity at a height 1 km above the earth is the same as at a depth d below the surface of earth. Then

The bulk modulus of a spherical object is 'B'. If it is subjected to uniform pressure 'p', the fractional decrease in radius is

A U tube with both ends open to the atmosphere, is partially filled with water. Oil, which is immiscible with water, is poured into one side until it stands at a distance of 10 mm above the water level on the other side. Meanwhile the water rises by 65 mm from its original level (see diagram).

Two rods A and B of different materials are welded together as shown in figure. Their thermal conductivities are K₁ and K₂. The thermal conductivity of the composite rod will be :

A spherical black body with a radius of 12 cm radiates 450 watt power at 500 K. If the radius were halved and the temperature doubled, the power radiated in watt would be

Thermodynamic processes are indicated in the following diagram:

A carnot engine having an efficiency of 1/10 as heat engine, is used as a refrigerator. If the work done on the system is 10 J, the amount of energy absorbed from the reservoir at lower temperature is

A gas mixture consists of 2 moles of O₂ and 4 moles of Ar at temperature T. Neglecting all vibrational modes, the total internal energy of the system is:

A particle executes linear simple harmonic motion with an amplitude of 3 cm. When the particle is at 2 cm from the mean position, the magnitude of its velocity is equal to that of its acceleration. Then its time period in seconds is

A spring of force constant k is cut into lengths of ratio 1 : 2 : 3. They are connected in series and the new force constant is k'. Then they are connected in parallel and force constant is k''. Then k' : k'' is

The two nearest harmonics of a tube closed at one end and open at other end are 220 Hz and 260 Hz. What is the fundamental frequency of the system?

Two cars moving in opposite directions approach each other with speed of 22 m/s and 16.5 m/s respectively. The driver of the first car blows a horn having a frequency 400 Hz. The frequency heard by the driver of the second car is (velocity of sound 340 m/s):

Suppose the ratio of proton and electron differ slightly. One of them is −e, the other is (e + Δe). If the net of electrostatic force and gravitational force between two hydrogen atoms placed at a distance d (much greater than atomic size) apart is zero, then Δe is of the order of [Given mass of hydrogen mₕ = 1.67 × 10⁻²⁷ kg]

The diagrams below show regions of equipotentials.

A positive charge is moved from A to B in each diagram.

A capacitor is charged by a battery. The battery is removed and another identical uncharged capacitor is connected in parallel. The total electrostatic energy of resulting system:

The resistance of a wire is 'R ohm. If it is melted and stretched to 'n' times its original length, its new resistance will be:-

A potentiometer is an accurate and versatile device to make electrical measurements of E.M.F. because the method involves

A 250-turn rectangular coil of length 2.1 cm and width 1.25 cm can carry a current of 85 μA and subjected to magnetic field of strength 0.85 T. Work done for rotating the coil by 180° against the torque is

An arrangement of three parallel straight wires placed perpendicular to plane of paper carrying same current I along the same direction is shown in fig. Magnitude of force per unit length on the middle wire 'B' is given by

If θ₁ and θ₂ be the apparent angles of dip observed in two vertical planes at right angles to each other, then true angle of dip θ is given by :

A long solenoid of diameter 0.1 m has 2 x 10⁴ turns per meter. At the centre of the solenoid, a coil of 100 turns and radius 0.01 m is placed with its axis coinciding with the solenoid axis. The current in the solenoid reduces at a constant rate to OA from 4 A in 0.05 s. If the resistance of the coil is 10π²Ω. the total charge flowing through the coil during this time is :

Figure shows a circuit that contains three identical resistors with resistance R = 9.0 Ω each, two identical inductors with inductance L = 2.0 mH each, and an ideal battery with emf ε = 18 V. The current ‘i’ through the battery just after the switch closed is

In an electromagnetic wave in free space the root mean square value of the electric field is Eₘₛ = 6 V/m. The peak value of the magnetic field is

A beam of light from a source L is incident normally on a plane mirror fixed at a certain distance x from the source. The beam is reflected back and a spot on a scale placed just above the source I. When the mirror is rotated through a small angle θ, the spot of the light is found to move through a distance y on the scale. The angle θ is given by

A thin prism having refracting angle 10° is made of glass of refractive index 1.42. This prism is combined with another thin prism of glass of refractive index 1.7. This combination produces dispersion without deviation. The refracting angle of second prism should be

Young's double slit experiment is first performed in air and then in a medium other than air. It is found that 8th bright fringe is observed where 5th dark fringe lies in air. The refractive index of the medium is nearly

Two Polaroids P₁ and P₂ are placed with their axis perpendicular to each other. Unpolarized light I₀ is incident on P₁. A third polaroid P₃ is kept in between P₁ and P₂ such that its axis makes an angle 45° with that of P₁. The intensity of transmitted light P₂ is

The ratio of resolving powers of an optical microscope for two wavelengths λ₁ = 4000 Å and λ₂ = 6000 Å is

The de-Broglie wavelength of a neutron in thermal equilibrium with heavy water at a temperature T (Kelvin)

and mass m, is :-

The ratio of wavelengths of the last line of Balmer series and the last line of Lyman series is

Radioactive material 'A' has decay constant λ and material 'B' has decay constant λ'. Initially they have same number of nuclei. After what time, the ratio of number of nuclei of material 'B' to that 'A' will be 1/e?

Which one of the following represents forward bias diode?

In a common emitter transistor amplifier the audio signal voltage across the collector is 3 V. The resistance of collector is 3 kΩ. If current gain is 100 and the base resistance is 2 kΩ, the voltage and power gain of the amplifier is

The given electrical network is equivalent to :

Which one is the wrong statement ?

The element Z = 114 has been discovered recently.
It will belong to which of the following family/group and electronic configuration?

Which of the following pairs of compounds isoelectronic and isostructural?

The species, having bond angles of 120° is:

Which of the following pairs of species have the same bond order?

A gas is allowed to expand in a well insulated container against a constant external pressure of 2.5 atm from an initial volume of 2.50 L to a final volume of 4.50 L. The change in internal energy ΔU of the gas in joules will be:

For a given reaction, ΔH = 35.5 kJ mol⁻¹ and ΔS = 83.6 JK⁻¹ mol⁻¹. The reaction is spontaneous at:

(Assume that ΔH and ΔS do not vary with temperature)

The equilibrium constant of the following are:

N₂ + 3H₂ ⇌ 2NH₃ K₁
N₂ + O₂ ⇌ 2NO K₂

H₂ + 1/2 O₂ ⇌ H₂O K₃

A 20 litre container at 400 K contains CO₂(g) at pressure 0.4 atm and excess of SrO (neglect volume occupied by SrO). The volume of the container is now decreased by moving the movable piston tighter, with constant temperature. The maximum volume of the container, when pressure of CO₂ attains its maximum value, will be:
(Given that : SrCO₃(s) ⇌ SrO(s) + CO₂(g), KP = 1.6 atm)

Concentration of the Ag⁺ ions in a saturated solution of Ag₂C₂O₄ is 2.2 × 10⁻⁴ mol L⁻¹. Solubility product of Ag₂C₂O₄ is:

It is because of inability of np² electrons of the valence shell to participate in bonding that:

The IUPAC name of the compound is:

The most suitable method of separation of 1 : 1 mixture of ortho and para-nitrophenols is:

The correct statement regarding electrophile is:

With respect to the conformers of ethane, which of the following statements is true?

Which one is the correct order of acidity?

Which of the following is a sink for CO?

If molality of the dilute solutions is doubled, the value of molal depression constant (K_f) will be-

Which of the following is dependent on temperature?

Ionic mobility of which of the following alkali metal ions is lowest when aqueous solution of their salts are put under an electric field?

In the electrochemical cell:-
Zn | ZnSO₄ (0.01 M) || CuSO₄ (1.0 M) | Cu, the emf of this Daniell cell is E₁. When the concentration of ZnSO₄ is changed to 1.0 M and that of CuSO₄ changed to 0.01 M, the emf changes to E₂. From the following, which one is the relationship between E₁ and E₂? (Given, RT/F = 0.059)

Mechanism of a hypothetical reaction
X₂ + Y₂ → 2XY is given below:

(i) X₂ → X + X (fast)
(ii) X + Y₂ ⇌ XY + Y (slow)
(iii) X + Y → XY (fast)
The overall order of the reaction will be:

A first order reaction has a specific reaction rate of 10⁻² s⁻¹. How much time will it take for 20 g of the reactant to reduce to 5 g?

Which one of the following statements is not correct?

Extraction of gold and silver involves leaching with CN⁻ ion. Silver is later recovered by

In which pair of ions both the species contain S–S bond?

Name the gas that can readily decolourise acidified KMnO₄ solution :

The reason for greater range of oxidation states in actinoids is attributed to :

The correct order of the stoichiometries of AgCl formed when AgNO₃ in excess is treated with the complexes CoCl₃·6NH₃, CoCl₃·5NH₃, CoCl₃·4NH₃ respectively is :

HgCl₂ and I₂ both when dissolved in water containing I⁻ ions, the pair of species formed is :

Correct increasing order for the wavelengths of absorption in the visible region the complexes of Co³⁺ is :-

Pick out the correct statement with respect to [Mn(CN)₆]³⁻ :-

An example of sigma bonded organometallic compound is :

Which one is the most acidic compound ?

The heating of phenyl-methyl ethers with HI produces

Consider the reactions :-

Identify A, X, Y and Z

The correct increasing order of basic strength for the following compounds is :

Which of the following reactions is appropriate for converting acetamide to methanamine?

Which of the following statements is not correct :

Mixture of chloroxylenol and terpineol acts as:

The heating of phenyl-methyl ethers with HI produces

Which of the following are found in extreme saline conditions?

Which of the following components provides sticky character to the bacterial cell?

Which among the following are the smallest living cells, known without a definite cell wall, pathogenic to plants as well as animals and can survive without oxygen?

Viroids differ from viruses in having:

An example of colonial alga is:

Zygotic meiosis is characteristic of:

Life cycle of Ectocarpus and Fucus respectively are:

Select the mismatch

Double fertilization is exhibited by :

In case of poriferans, the spongocoel is lined with flagellated cells called:

An important characteristic that Hemichordates share with

Chordates is

Which among these is the correct combination of aquatic

mammals?

Plants which produce characteristic pneumatophores and show

vivipary belong to:

In Bougainvillea thoms are the modifications of

Coconut fruit is a:

The morphological nature of the edible part of coconut is;

Root hairs develop from the region of

‘Which of the following is made up of dead cells?

Which of the following facilitates opening of stomatal aperture?

The vascular cambium normally gives rise to :

Frog’s heart when taken out of the body continues to beat for sometime.Select the best option from the following statements.

(A) Frog is a poikilotherm.

(B) Frog does not have any coronary circulation.

(C) Heart is “myogenic” in nature.

(D) Heart is autoexcitable

which of the following cell organelles is responsible for extracting energy from carbohydrates to form ATP?

About 98 percent of the mass of every living organism is composed of just six elements including carbon, hydrogen, nitrogen, oxygen and

Which one of the following statements is correct, with reference to enzymes?

Which of the following options gives the correct sequence of events during mitosis?

Which of the following are not polymeric?

DNA replication in bacteria occurs

Anaphase Promoting Complex (APC) is a protein degradation machinery necessary for proper mitosis of animal cells. If APC is defective in a human cell, which of the following is expected to occur?

The water potential of pure water is

With reference to factors affecting the rate of photosynthesis, which of the following statements is not correct?

Phosphoenol Pyruvate (PEP) is the primary CO₂ acceptor in:

Which statement is wrong for Kreb's cycle?

Fruit and leaf drop at early stages can be prevented by the application of

Which cells of "Crypts of Lieberkuhn" secrete antibacterial lysozyme?

The hepatic portal vein drains blood to liver from:

A baby boy aged two years is admitted to play school and passes through a dental check-up. The dentist observed that the baby had twenty teeth. Which teeth were absent?

Which of the following options best represents the enzyme composition of pancreatic juice?

Lungs are made up of air-filled sacs, the alveoli. They do not collapse even after forceful expiration, because of:

Adult human RBCs are enucleated. Which of the following statement(s) is/are most appropriate explanation for this feature?

(1) They do not need to reproduce
(2) They are somatic cells
(3) They do not metabolize
(4) All their internal space is available for oxygen transport

Which of the following statements is correct?

The pivot joint between atlas and axis is a type of:

X' pairs of ribs in humans and 'Y' pairs are true ribs. Select the option that correctly represents values of X and Y and provides their explanation:

Myelin sheath is produced by:

Receptor sites for neurotransmitter are present on:

Good vision depends on adequate intake of carotene rich food.
Select the best option from the following statements:

(i) Vitamin A derivatives are formed from carotene
(ii) The photopigments are embedded in the membrane of the inner segment
(iii) Retinal is a derivative of Vitamin A
(iv) Retinal is a light absorbing part of all the visual photopigments

A decrease in blood pressure / volume will not cause the release of:

Attractants and rewards are required for:

Flowers which have single ovule in the ovary and are packed into inflorescence are usually pollinated by:

A dioecious flowering plant prevents both:

Functional megaspore in an angiosperm develops into?

Capacitation occurs in:

The function of copper ions in copper releasing IUD's is:

In case of a couple where the male is having a very low sperm count, which technique will be suitable for fertilisation?

The genotypes of husband and wife are IᴬIᴮ and Iᴬi. Among the blood types of their children, how many different genotypes and phenotypes are possible?

Among the following characters, which one was not considered by Mendel in his experiments on pea?

Which one from those given below is the period for Mendel's hybridisation experiments?

Thalassemia and sickle cell anemia are caused due to a problem in globin molecule synthesis. Select the correct statement:

A disease caused by an autosomal primary non-disjunction is:

The final proof for DNA as the genetic material came from the experiments of:

DNA fragments are:

Which of the following RNAs should be most abundant

in animal cell?

The association of histone H1 with a nucleosome indicates:

If there are 999 bases in an RNA that codes for a protein with 333 amino acids, and the base at position 901 is deleted such that the length of the RNA becomes 998 bases, how many codons will be altered?

During DNA replication, Okazaki fragments are used to

elongate:

Spliceosomes are not found in cells of;

Which of the following represents order of Horse’?

Transplantation of tissues/organs fails often due to non-acceptance by the patient’s body. Which type of immune-response is responsible for such rejections

MALT constitutes about ............. percent of the lymphoid tissue in human body.

Homozygous pure lines in cattle can be obtained by:

‘Which of the following in sewage treatment removes suspended solids?

‘Which of the following is correctly matched for the product produced by them ?

The DNA fragments separated on an agarose gel can be visualised after staining with:

A gene whose expression helps to identify transformed cell is known as :

‘What is the criterion for DNA fragments movement on agarose gel during gel electrophoresis?

The process of separation and purification of expressed protein before marketing is called:

Presence of plants arranged into well defined vertical layers depending on their height can be seen best in:

Asymptote in a logistic growth curve is obtained when :

Mycorrhizae are the example of :

Which ecosystem has the maximum biomass?

Alexander Von Humboldt described for the first time:

‘Which one of the following statements is not valid for aerosols?

Artificial selection to obtain cows yielding higher milk

output represents :

Select the mismatch :

Which one of the following is related to Ex-situ conservation of threatened animals and plants ?

A temporary endocrine gland in the human body is:

Match the following sexually transmitted diseases (Column-I) with their causative agent (Column-II) and select

the correct option :

‘Which of the following in sewage treatment removes suspended solids

Select the correct route for the passage of sperms in male frogs:

GnRH, a hypothalamic hormone, needed in reproduction, acts on:

Identify the wrong statement in context of heartwood:

Consider a drop of rain water having mass 1 g falling from a height of 1 km. It hits the ground with a speed of 50 m/s. Take 'g' constant with a value 10 m/s². The work done by the(i) gravitational force and

(ii) resistive force of air is

Which of the following statements are correct?

(A) Centre of mass of a body always coincides with the centre of gravity of the body.
(B) Centre of mass of a body is the point at which the total gravitational torque on the body is zero.
(C) A couple on a body produce both translational and rotation motion in a body.
(D) Mechanical advantage greater than one means that small effort can be used to lift a large load.

Predict the correct intermediate and product in the following reaction

Match the interhalogen compounds of column-I with the geometry in column Il and assign the correct code.

Which one is the most acidic compound ?

Identify A and predict the type of reaction

out of the following, which is the product formed when cyclohexanone undergoes aldol condensation followed by heating ?