NEET 2023 | NEET Year Wise Previous Years Questions

Biology

Chemistry

1. Given below are two statements : one is labelled as Assertion $$\mathbf{A}$$ and the other is labelled as Reason $$\math 2. The conductivity of centimolar solution of $$\mathrm{KCl}$$ at $$25^{\circ} \mathrm{C}$$ is $$0.0210 ~\mathrm{ohm}^{-1} 3. For a certain reaction, the rate $$=\mathrm{k}[\mathrm{A}]^{2}[\mathrm{~B}]$$, when the initial concentration of A is tr 4. Identify product $$(\mathrm{A})$$ is the following reaction : 5. Which one is an example of heterogenous catalysis? 6. Given below are two statements : one is labelled as Assertion A and the other is labelled as Reason R. Assertion A : Hel 7. Amongst the following, the total number of species NOT having eight electrons around central atom in its outer most shel 8. The correct order of energies of molecular orbitals of $$\mathrm{N}_{2}$$ molecule, is 9. Match List I with List II: .tg {border-collapse:collapse;border-spacing:0;} .tg td{border-color:black;border-style:sol 10. The number of $$\sigma$$ bonds, $$\pi$$ bonds and lone pair of electrons in pyridine, respectively are: 11. The element expected to form largest ion to achieve the nearest noble gas configuration is 12. Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R. Assertion A : A re 13. Consider the following reaction and identify the product (P). 14. Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R: Assertion A : In e 15. Which amongst the following options is correct graphical representation of Boyle's law? 16. In Lassaigne's extract of an organic compound, both nitrogen and sulphur are present, which gives blood red colour with 17. Identify the product in the following reaction: 18. Select the correct Statements from the following : A. Atoms of all elements are composed of two fundamental particles. B 19. A compound is formed by two elements A and B. The elements B forms cubic close packed structure and atoms of A occupy $$ 20. Given below are two statements: Statement I : A unit formed by the attachment of a base to 1' position of sugar is known 21. Which amongst the following molecules on polymerization produces neoprene? 22. Taking stability as the factor, which one of the following represents correct relationship? 23. Some tranquilizers are listed below. Which one from the following belongs to barbiturates? 24. Which of the following statements are NOT correct? A. Hydrogen is used to reduce heavy metal oxides to metals. B. Heavy 25. Intermolecular forces are forces of attraction and repulsion between interacting particles that will include: A. dipole 26. Amongst the given options which of the following molecules/ion acts as a Lewis acid? 27. The right option for the mass of $$\mathrm{CO}_{2}$$ produced by heating $$20 \mathrm{~g}$$ of $$20 \%$$ pure limestone 28. The relation between $$\mathrm{n}_{\mathrm{m}},\left(\mathrm{n}_{\mathrm{m}}=\right.$$ the number of permissible values 29. The stability of $$\mathrm{Cu}^{2+}$$ is more than $$\mathrm{Cu}^{+}$$ salts in aqueous solution due to - 30. Which one of the following statements is correct? 31. Which of the following reactions will NOT give primary amine as the product? 32. The given compound is an example of _________. 33. Complete the following reaction: [C] is _______. 34. Homoleptic complex from the following complexes is : 35. Weight (g) of two moles of the organic compound, which is obtained by heating sodium ethanoate with sodium hydroxide in 36. Consider the following reaction Identify products A and B :- 37. Which amongst the following will be most readily dehydrated under acidic conditions? 38. The equilibrium concentrations of the species in the reaction $$\mathrm{A}+\mathrm{B} \rightleftharpoons \mathrm{C}+\mat 39. Given below are two statements: Statement I : The nutrient deficient water bodies lead to eutrophication. Statement II : 40. Which amongst the following options is the correct relation between change in enthalpy and change in internal energy? 41. Match List I with List II: .tg {border-collapse:collapse;border-spacing:0;} .tg td{border-color:black;border-style:sol 42. Identify the major product obtained in the following reaction: 43. Pumice stone is an example of - 44. The reaction that does NOT take place in blast furnace between 900 K to 1500 K temperature range during extraction of 45. Which of the following statements are INCORRECT? A. All the transition metals except scandium form MO oxides which are i 46. Consider the following compounds/species: The number of compounds/species which obey Huckel's rule is ___________. 47. What fraction of one edge centred octahedral void lies in one unit cell of fcc? 48. Which complex compound is most stable? 49. On balancing the given redox reaction, $$\mathrm{aCr}_{2} \mathrm{O}_{7}^{2-}+\mathrm{bSO}_{3}^{2-}(\mathrm{aq})+\mathrm 50. Identify the final product [D] obtained in the following sequence of reactions.

Physics

1. In a series LCR circuit, the inductance $$L$$ is $$10 ~\mathrm{mH}$$, capacitance $$C$$ is $$1 ~\mu \mathrm{F}$$ and res 2. The magnitude and direction of the current in the following circuit is :- 3. If the galvanometer $$G$$ does not show any deflection in the circuit shown, the value of $$R$$ is given by: 4. The temperature of a gas is $$-50^{\circ} \mathrm{C}$$. To what temperature the gas should be heated so that the rms spe 5. The ratio of radius of gyration of a solid sphere of mass $$M$$ and radius $$R$$ about its own axis to the radius of gyr 6. A Carnot engine has an efficiency of $$50 \%$$ when its source is at a temperature $$327^{\circ} \mathrm{C}$$. The tempe 7. A bullet is fired from a gun at the speed of $$280 \mathrm{~ms}^{-1}$$ in the direction $$30^{\circ}$$ above the horizon 8. An electric dipole is placed at an angle of $$30^{\circ}$$ with an electric field of intensity $$2 \times 10^{5} \mathrm 9. Given below are two statements: Statement I : Photovoltaic devices can convert optical radiation into electricity. State 10. The errors in the measurement which arise due to unpredictable fluctuations in temperature and voltage supply are : 11. The ratio of frequencies of fundamental harmonic produced by an open pipe to that of closed pipe having the same length 12. The net magnetic flux through any closed surface is : 13. The work functions of Caesium $$(\mathrm{Cs})$$, potassium $$(\mathrm{K})$$ and Sodium (Na) are $$2.14 ~\mathrm{eV}, 2.3 14. The minimum wavelength of $$X$$-rays produced by an electron accelerated through a potential difference of $$V$$ volts i 15. A $$12 \mathrm{~V}, 60 \mathrm{~W}$$ lamp is connected to the secondary of a step down transformer, whose primary is con 16. Light travels a distance $$\mathrm{x}$$ in time $$t_{1}$$ in air and $$10 \mathrm{x}$$ in time $$t_{2}$$ in another dens 17. A metal wire has mass $$(0.4 \pm 0.002) ~\mathrm{g}$$, radius $$(0.3 \pm 0.001) ~\mathrm{mm}$$ and length $$(5 \pm 0.02) 18. For Young's double slit experiment, two statements are given below : Statement I : If screen is moved away from the plan 19. The half life of a radioactive substance is 20 minutes. In how much time, the activity of substance drops to $$\left(\fr 20. The equivalent capacitance of the system shown in the following circuit is: 21. Resistance of a carbon resistor determined from colour codes is $$(22000 \pm 5 \%) \Omega$$. The colour of third band mu 22. An ac source is connected to a capacitor C. Due to decrease in its operating frequency 23. A vehicle travels half the distance with speed $$v$$ and the remaining distance with speed $$2 v$$. Its average speed is 24. The amount of energy required to form a soap bubble of radius $$2 \mathrm{~cm}$$ from a soap solution is nearly: (surfac 25. The venturi-meter works on : 26. In hydrogen spectrum, the shortest wavelength in the Balmer series is $$\lambda$$. The shortest wavelength in the Bracke 27. The potential energy of a long spring when stretched by $$2 \mathrm{~cm}$$ is U. If the spring is stretched by $$8 \math 28. A full wave rectifier circuit consists of two p-n junction diodes, a centre-tapped transformer, capacitor and a load res 29. The magnetic energy stored in an inductor of inductance $$4 ~\mu \mathrm{H}$$ carrying a current of $$2 \mathrm{~A}$$ is 30. If $$\oint_\limits{s} \vec{E} \cdot \overrightarrow{d S}=0$$ over a surface, then: 31. A football player is moving southward and suddenly turns eastward with the same speed to avoid an opponent. The force th 32. Let a wire be suspended from the ceiling (rigid support) and stretched by a weight $$W$$ attached at its free end. The l 33. The angular acceleration of a body, moving along the circumference of a circle, is : 34. In a plane electromagnetic wave travelling in free space, the electric field component oscillates sinusoidally at a freq 35. Two bodies of mass $$m$$ and $$9 m$$ are placed at a distance $$R$$. The gravitational potential on the line joining the 36. In the figure shown here, what is the equivalent focal length of the combination of lenses (Assume that all layers are t 37. Calculate the maximum acceleration of a moving car so that a body lying on the floor of the car remains stationary. The 38. A satellite is orbiting just above the surface of the earth with period $$T$$. If $$d$$ is the density of the earth and 39. The $$x$$ - $$t$$ graph of a particle performing simple harmonic motion is shown in the figure. The acceleration of the 40. For the following logic circuit, the truth table is: 41. A horizontal bridge is built across a river. A student standing on the bridge throws a small ball vertically upwards wit 42. Two thin lenses are of same focal lengths $$(f)$$, but one is convex and the other one is concave. When they are placed 43. A wire carrying a current $$I$$ along the positive $$\mathrm{x}$$-axis has length $$L$$. It is kept in a magnetic field 44. A bullet from a gun is fired on a rectangular wooden block with velocity $$u$$. When bullet travels $$24 \mathrm{~cm}$$ 45. The resistance of platinum wire at $$0^{\circ} \mathrm{C}$$ is $$2 ~\Omega$$ and $$6.8 ~\Omega$$ at $$80^{\circ} \mathrm 46. An electric dipole is placed as shown in the figure. The electric potential (in 102 V) at point P due to the dipole is 47. 10 resistors, each of resistance $$\mathrm{R}$$ are connected in series to a battery of emf $$E$$ and negligible interna 48. A very long conducting wire is bent in a semi-circular shape from $$A$$ to $$B$$ as shown in figure. The magnetic field 49. The radius of inner most orbit of hydrogen atom is $$5.3 \times 10^{-11} \mathrm{~m}$$. What is the radius of third allo 50. The net impedance of circuit (as shown in figure) will be :

NEET 2023

MCQ (Single Correct Answer)

-1

Out of Syllabus

Which one is an example of heterogenous catalysis?

Hydrolysis of sugar catalysed by $$\mathrm{H}^{+}$$ ions.

Decomposition of ozone is presence of nitrogen monoxide.

Combination between dinitrogen and dihydrogen to form ammonia in the presence of finely divided iron.

Oxidation of sulphur dioxide into sulphur trioxide in the presence of oxides of nitrogen.

NEET 2023

MCQ (Single Correct Answer)

-1

Given below are two statements : one is labelled as Assertion A and the other is labelled as Reason R.

Assertion A : Helium is used to dilute oxygen in diving apparatus.

Reason R : Helium has high solubility in O$$_2$$.

In the light of the above statements, choose the correct answer from the options given below:

Both A and R are true but R is NOT the correct explanation of A.

A is true but R is false.

A is false but R is true.

Both A and R are true and R is the correct explanation of A.

NEET 2023

MCQ (Single Correct Answer)

-1

Amongst the following, the total number of species NOT having eight electrons around central atom in its outer most shell, is

$$\mathrm{NH}_{3}, \mathrm{AlCl}_{3}, \mathrm{BeCl}_{2}, \mathrm{CCl}_{4}, \mathrm{PCl}_{5}$$ :

NEET 2023

MCQ (Single Correct Answer)

-1

The correct order of energies of molecular orbitals of $$\mathrm{N}_{2}$$ molecule, is

$$\sigma 1 \mathrm{~s} < \sigma^{*} 1 \mathrm{~s} < \sigma 2 \mathrm{~s} < \sigma^{*} 2 \mathrm{~s} < \sigma 2 \mathrm{p}_{\mathrm{z}} < \left(\pi 2 \mathrm{p}_{\mathrm{x}}=\pi 2 \mathrm{p}_{\mathrm{y}}\right) < \left(\pi^{*} 2 \mathrm{p}_{\mathrm{x}}=\pi^{*} 2 \mathrm{p}_{\mathrm{y}}\right) < \sigma^{*} 2 \mathrm{p}_{\mathrm{z}}$$

$$\sigma 1 \mathrm{~s} <\sigma^{*} 1 \mathrm{~s} <\sigma 2 \mathrm{~s} < \sigma^{*} 2 \mathrm{~s} < \sigma 2 \mathrm{p}_{\mathrm{z}} < \sigma^{*} 2 \mathrm{p}_{\mathrm{z}} < \left(\pi 2 \mathrm{p}_{\mathrm{x}}=\pi 2 \mathrm{p}_{\mathrm{y}}\right) < \left(\pi^{*} 2 \mathrm{p}_{\mathrm{x}}=\pi^{*} 2 \mathrm{p}_{\mathrm{y}}\right)$$

$$\sigma 1 \mathrm{~s} <\sigma^{*} 1 \mathrm{~s} <\sigma 2 \mathrm{~s} < \sigma^{*} 2 \mathrm{~s} < \left(\pi 2 \mathrm{p}_{\mathrm{x}}=\pi 2 \mathrm{p}_{\mathrm{y}}\right) < \left(\pi^{*} 2 \mathrm{p}_{\mathrm{x}}=\pi^{*} 2 \mathrm{p}_{\mathrm{y}}\right) < \sigma 2 \mathrm{p}_{\mathrm{z}} < \sigma^{*} 2 \mathrm{p}_{\mathrm{z}}$$

$$\sigma 1 \mathrm{~s} <\sigma^{*} 1 \mathrm{~s} <\sigma 2 \mathrm{~s} < \sigma^{*} 2 \mathrm{~s} < \left(\pi 2 \mathrm{p}_{\mathrm{x}}=\pi 2 \mathrm{p}_{\mathrm{y}}\right) < \sigma 2 \mathrm{p}_{\mathrm{z}} < \left(\pi^{*} 2 \mathrm{p}_{\mathrm{x}}=\pi^{*} 2 \mathrm{p}_{\mathrm{y}}\right) < \sigma^{*} 2 \mathrm{p}_{\mathrm{z}}$$

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