NEET 2025 questions
151 questions, by subject. Each opens with its options and answer.
Zoology
- The first menstruation is called :
Human Reproduction
- Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A) : All vertebrates are chordates but all chordates are not vertebrate. Reason (R) : The members of…
Animal Kingdom
- Given below are two statements : Statement I : The DNA fragments extracted from gel electrophoresis can be used in construction of recombinant DNA. Statement II : Smaller size DNA fragments are observed near anode while…
Biomolecules
- What is the main function of the spindle fibers during mitosis?
Locomotion and Movement
- Identify the statement that is NOT correct.
Animal Kingdom
- Consider the following : A. The reductive division for the human female gametogenesis starts earlier than that of the male gametogenesis. B. The gap between the first meiotic division and the second meiotic division is…
Human Reproduction
- The blue and white selectable markers have been developed which differentiate recombinant colonies from non-recombinant colonies on the basis of their ability to produce colour in the presence of a chromogenic…
Biomolecules
- Match List I with List II: List-I List-II A. Adenosine I. Nitrogen base B. Adenylic acid II. Nucleotide C. Adenine III. Nucleoside D. Alanine IV. Amino acid Choose the option with all correct matches.
Biomolecules
- Consider the following statements regarding function of adrenal medullary hormones : (A) It causes pupilary constriction. (B) It is a hyperglycemic hormone. (C) It causes piloerection. (D) It increases strength of heart…
Chemical Coordination and Integration
- Who proposed that the genetic code for amino acids should be made up of three nucleotides?
Biomolecules
- Sweet potato and potato represent a certain type of evolution. Select the correct combination of terms to explain the evolution.
Evolution
- All living members of the class Cyclostomata are :
Animal Kingdom
- Histones are enriched with -
Biomolecules
- Match List-I with List-II. List-I List-II A. Progesterone I. Pars intermedia B. Relaxin II. Ovary C. Melanocyte stimulating hormone III. Adrenal Medulla D. Catecholamines IV. Corpus luteum Choose the correct answer from…
Chemical Coordination and Integration
- The protein portion of an enzyme is called:
Biomolecules
- Which of the following enzyme(s) are NOT essential for gene cloning? A. Restriction enzymes B. DNA ligase C. DNA mutase D. DNA recombinase E. DNA polymerase Choose the correct answer from the options given below:
Biomolecules
- Which of the following type of immunity is present at the time of birth and is a non-specific type of defence in the human body?
Human Health and Disease
- Which factor is important for termination of transcription?
Biomolecules
- Which of the following hormones released from the pituitary is actually synthesized in the hypothalamus?
Chemical Coordination and Integration
- Role of the water vascular system in Echinoderms is : A. Respiration and Locomotion B. Excretion and Locomotion C. Capture and transport of food D. Digestion and Respiration E. Digestion and Excretion Choose the correct…
Animal Kingdom
- After maturation, in primary lymphoid organs, the lymphocytes migrate for interaction with antigens to secondary lymphoid organ(s) / tissue(s) like A. thymus B. bone marrow C. spleen D. lymph nodes E. Peyer's patches…
Human Health and Disease
- Why can't insulin be given orally to diabetic patients?
Chemical Coordination and Integration
- Frogs respire in water by skin and buccal cavity and on land by skin, buccal cavity and lungs. Choose the correct answer from the following :
Breathing and Exchange of Gases
- Silencing of specific mRNA is possible via RNAi because of
Biomolecules
- Twins are born to a family that lives next door to you. The twins are a boy and a girl. Which of the following must be true?
Human Reproduction
- In frog, the Renal portal system is a special venous connection that acts to link :
Body Fluids and Circulation
- Match List-I with List-II. List-I List-II A. Heart (I) Erythropoietin B. Kidney (II) Aldosterone C. Gastro-intestinal tract (III) Atrial natriuretic factor D. Adrenal Cortex (IV) Secretin Choose the correct answer from…
Chemical Coordination and Integration
- Cardiac activities of the heart are regulated by: A. Nodal tissue B. A special neural centre in the medulla oblongata C. Adrenal medullary hormones D. Adrenal cortical hormones Choose the correct answer from the options…
Body Fluids and Circulation
- Neoplastic characteristics of cells refer to : A. A mass of proliferating cell B. Rapid growth of cells C. Invasion and damage to the surrounding tissue D. Those confined to original location Choose the correct answer…
Human Health and Disease
- Which one of the following enzymes contains 'Haem' as the prosthetic group?
Biomolecules
- Match List-I with List-II. List-I List-II A. Emphysema I. Rapid spasms in muscle due to low Ca^++ in body fluid B. Angina Pectoris II. Damaged alveolar walls and decreased respiratory surface C. Glomerulonephritis III.…
Breathing and Exchange of Gases
- Which of the following statement is correct about location of the male frog copulatory pad?
Structural Organisation in Animals
- Polymerase chain reaction (PCR) amplifies DNA following the equation.
Biomolecules
- Match List - I with List - II. List - I List - II A. Head (I) Enzymes B. Middle piece (II) Sperm motility C. Acrosome (III) Energy D. Tail (IV) Genetic material Choose the correct answer from the options given below :
Human Reproduction
- From the statements given below choose the correct option : A. The eukaryotic ribosomes are 80S and prokaryotic ribosomes are 70S. B. Each ribosome has two sub-units. C. The two sub-units of 80S ribosome are 60S and 40S…
Biomolecules
- Which are correct: A. Computed tomography and magnetic resonance imaging detect cancers of internal organs. B. Chemotherapeutics drugs are used to kill non-cancerous cells. C. α-interferon activate the cancer patients'…
Human Health and Disease
- Name the class of enzyme that usually catalyze the following reaction : S - G + S^\# arrow S + S^\# - G Where, G arrow a group other than hydrogen S arrow a substrate S^\# arrow another substrate
Biomolecules
- Find the correct statement : (A) In human pregnancy, the major organ systems are formed at the end of 12 weeks. (B) In human pregnancy the major organ systems are formed at the end of 8 weeks. (C) In human pregnancy…
Human Reproduction
- Given below are two statements : Statement I : In the RNA world, RNA is considered the first genetic material evolved to carry out essential life processes. RNA acts as a genetic material and also as a catalyst for some…
Biomolecules
- Given below are two statements : Statement I : Transfer RNAs and ribosomal RNA do not interact with mRNA. Statement II : RNA interference (RNAi) takes place in all eukaryotic organisms as a method of cellular defence.…
Biomolecules
- What is the pattern of inheritance for polygenic trait?
Evolution
- Which of the following genetically engineered organisms was used by Eli Lilly to prepare human insulin?
Animal Husbandry
- Which of the following are the post-transcriptional events in an eukaryotic cell? A. Transport of pre-mRNA to cytoplasm prior to splicing. B. Removal of introns and joining of exons. C. Addition of methyl group at 5'…
Biomolecules
- Match List I with List II: List-I List-II A. Alfred Hershey and Martha Chase I. Streptococcus pneumoniae B. Euchromatin II. Densely packed and dark-stained C. Frederick Griffith III. Loosely packed and light-stained D.…
Biomolecules
- Which chromosome in the human genome has the highest number of genes?
Biomolecules
- What are the potential drawbacks in adoption of the IVF method? A. High fatality risk to mother B. Expensive instruments and reagents C. Husband/wife necessary for being donors D. Less adoption of orphans E. Not…
Reproductive Health
- What is the name of the blood vessel that carries deoxygenated blood from the body to the heart in a frog?
Body Fluids and Circulation
- While trying to find out the characteristic of a newly found animal, a researcher did the histology of adult animal and observed a cavity with presence of mesodermal tissue towards the body wall but no mesodermal tissue…
Animal Kingdom
- Which one of the following statements refers to Reductionist Biology?
Biomolecules
- The complex II of mitochondrial electron transport chain is also known as
Biomolecules
Botany
- Which of the following is the unit of productivity of an Ecosystem?
Ecosystem
- Genes R and Y follow independent assortment. If RRYY produce round yellow seeds and rryy produce wrinkled green seeds, what will be the phenotypic ratio of the F2 generation?
Principles of Inheritance
- How many meiotic and mitotic divisions need to occur for the development of a mature female gametophyte from the megaspore mother cell in an angiosperm plant?
Sexual Reproduction in Flowering Plants
- Given below are two statements : One is labelled as Assertion (A) and other is labelled as Reason (R). Assertion (A) : Cells of the tapetum possess dense cytoplasm and generally have more than one nucleus. Reason (R) :…
Sexual Reproduction in Flowering Plants
- In bryophytes, the gemmae help in which one of the following?
Plant Kingdom
- Which of the following is an example of a zygomorphic flower?
Morphology of Flowering Plants
- Given below are two statements: Statement I: In ecosystem, there is unidirectional flow of energy of sun from producers to consumers. Statement II: Ecosystems are exempted from 2nd law of thermodynamics. In the light of…
Ecosystem
- Which one of the following equations represents the Verhulst-Pearl Logistic Growth of population?
Organisms and Populations
- Given below are two statements : one is labelled as Assertion (A), and the other is labelled as Reason (R). Assertion (A) : The primary function of the Golgi apparatus is to package the materials made by the endoplasmic…
Cell Structure and Function
- Which of the following statements about RuBisCO is true?
Photosynthesis
- Which of the following microbes is NOT involved in the preparation of household products? A. Aspergillus niger B. Lactobacillus C. Trichoderma polysporum D. Saccharomyces cerevisiae E. Propionibacterium sharmanii Choose…
Microbes in Human Welfare
- Match List I with List II: List I List II A. The Evil Quartet I. Cryopreservation B. Ex situ conservation II. Alien species invasion C. Lantana camara III. Causes of biodiversity losses D. Dodo IV. Extinction Choose the…
Biodiversity and Conservation
- Read the following statements on plant growth and development. (A) Parthenocarpy can be induced by auxins. (B) Plant growth regulators can be involved in promotion as well as inhibition of growth. (C) Dedifferentiation…
Plant Growth and Development
- Match List-I with List-II. List-I List-II A. Pteridophyte (I) Salvia B. Bryophyte (II) Ginkgo C. Angiosperm (III) Polytrichum D. Gymnosperm (IV) Salvinia Choose the option with all correct matches.
Plant Kingdom
- Which one of the following is the characteristic feature of gymnosperms?
Plant Kingdom
- Match List I with List II : List I List II A. Scutellum I. Persistent nucellus B. Non-albuminous seed II. Cotyledon of Monocot seed C. Epiblast III. Groundnut D. Perisperm IV. Rudimentary cotyledon Choose the option…
Sexual Reproduction in Flowering Plants
- Streptokinase produced by bacterium Streptococcus is used for
Microbes in Human Welfare
- Who is known as the father of Ecology in India?
Organisms and Populations
- Given below are two statements : One is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A) : A typical unfertilised, angiosperm embryo sac at maturity is 8 nucleate and 7-celled. Reason (R)…
Sexual Reproduction in Flowering Plants
- Given below are the stages in the life cycle of pteridophytes. Arrange the following stages in the correct sequence. A. Prothallus stage B. Meiosis in spore mother cells C. Fertilisation D. Formation of archegonia and…
Plant Kingdom
- Given below are two statements : One is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A) : Both wind and water pollinated flowers are not very colourful and do not produce nectar. Reason…
Sexual Reproduction in Flowering Plants
- Find the statement that is NOT correct with regard to the structure of monocot stem.
Anatomy of Flowering Plants
- Given below are two statements: Statement I : The primary source of energy in an ecosystem is solar energy. Statement II : The rate of production of organic matter during photosynthesis in an ecosystem is called net…
Ecosystem
- Each of the following characteristics represent a Kingdom proposed by Whittaker. Arrange the following in increasing order of complexity of body organization. A. Multicellular heterotrophs with cell wall made of chitin.…
Diversity in Living World
- The correct sequence of events in the life cycle of bryophytes is A. Fusion of antherozoid with egg. B. Attachment of gametophyte to substratum. C. Reduction division to produce haploid spores. D. Formation of…
Plant Kingdom
- Which of the following is an example of non-distilled alcoholic beverage produced by yeast?
Microbes in Human Welfare
- In the seeds of cereals, the outer covering of endosperm separates the embryo by a protein-rich layer called :
Sexual Reproduction in Flowering Plants
- Match List I with List II: List-I List-II A. Chlorophyll a (I) Yellow-green B. Chlorophyll b (II) Yellow C. Xanthophylls (III) Blue-green D. Carotenoids (IV) Yellow to Yellow-orange Choose the option with all correct…
Photosynthesis
- Match List-I with List-II. List-I List-II A. Centromere I. Mitochondrion B. Cilium II. Cell division C. Cristae III. Cell movement D. Cell membrane IV. Phospholipid Bilayer Choose the correct answer from the options…
Cell Structure and Function
- Which one of the following is an example of ex-situ conservation?
Biodiversity and Conservation
- A specialised membranous structure in a prokaryotic cell which helps in cell well wall formation, DNA replication and respiration is
Cell Structure and Function
- Which of following organisms cannot fix nitrogen? A. Azotobacter B. Oscillatoria C. Anabaena D. Volvox E. Nostoc Choose the correct answer from the options given below:
Mineral Nutrition
- Epiphytes that are growing on a mango branch is an example of which of the following?
Organisms and Populations
- Which one of the following phytohormones promotes nutrient mobilization which helps in the delay of leaf senescence in plants?
Plant Growth and Development
Chemistry
- If the molar conductivity (Lambda_m) of a 0.050 mol L^-1 solution of a monobasic weak acid is 90 S cm^2 mol^-1, its extent (degree) of dissociation will be [Assume λ^+ = 349.6 S cm^2 mol^-1 and λ^- = 50.4 S cm^2 mol^-1.]
Redox and Electrochemistry
- Given below are two statements : Statement I : A hypothetical diatomic molecule with bond order zero is quite stable. Statement II : As bond order increases, the bond length increases. In the light of the above…
Chemical Bonding
- The ratio of the wavelengths of the light absorbed by a Hydrogen atom when it undergoes n = 2 arrow n = 3 and n = 4 arrow n = 6 transitions, respectively, is
Atomic Structure
- The correct order of the wavelength of light absorbed by the following complexes is, A. [Co(NH_3)_6]^3+ B. [Co(CN)_6]^3- C. [Cu(H_2O)_4]^2+ D. [Ti(H_2O)_6]^3+ Choose the correct answer from the options given below:
Coordination Compounds
- If the rate constant of a reaction is 0.03 s^-1, how much time does it take for 7.2 mol L^-1 concentration of the reactant to get reduced to 0.9 mol L^-1? (Given: log 2 = 0.301)
Chemical Kinetics
- Match List I with List II List-I (Mixture) List-II (Method of separation) A. CHCl_3 + C_6H_5NH_2 (I) Distillation under reduced pressure B. Crude oil in petroleum industry (II) Steam distillation C. Glycerol from…
Practical Chemistry
- Which one of the following compounds can exist as cis-trans isomers?
Basic Principles of Organic Chemistry
- Among the following, choose the ones with equal number of atoms. A. 212 g of Na_2CO_3(s) [molar mass = 106 g] B. 248 g of Na_2O(s) [molar mass = 62 g] C. 240 g of NaOH(s) [molar mass = 40 g] D. 12 g of H_2(g) [molar…
Some Basic Concepts of Chemistry
- The standard heat of formation, in kcal/mol of Ba^2+ is : [Given : standard heat of formation of SO_4^2- ion (aq) = –216 kcal/mol, standard heat of crystallisation of BaSO_4(s) = –4.5 kcal/mol, standard heat of…
Chemical Thermodynamics
- Which of the following are paramagnetic? A. [NiCl_4]^2- B. Ni(CO)_4 C. [Ni(CN)_4]^2- D. [Ni(H_2O)_6]^2+ E. Ni(PPh_3)_4 Choose the correct answer from the options given below:
Coordination Compounds
- Match List-I with List-II. List-I List-II A. Haber process I. Fe catalyst B. Wacker oxidation II. PdCl_2 C. Wilkinson catalyst III. [(PPh_3)_3RhCl] D. Ziegler catalyst IV. TiCl_4 with Al(CH_3)_3 Choose the correct…
d- and f-Block Elements
- Match List-I with List-II. List-I (Name of Vitamin) List-II (Deficiency disease) A. Vitamin B12 I. Cheilosis B. Vitamin D II. Convulsions C. Vitamin B2 III. Rickets D. Vitamin B6 IV. Pernicious anaemia Choose the…
Biomolecules
- Given below are two statements : Statement I : Ferromagnetism is considered as an extreme form of paramagnetism. Statement II : The number of unpaired electrons in a Cr^2+ ion (Z = 24) is the same as that of a Nd^3+ ion…
d- and f-Block Elements
- If the half-life (t_1/2) for a first order reaction is 1 minute, then the time required for 99.9% completion of the reaction is closest to :
Chemical Kinetics
- The correct order of decreasing basic strength of the given amines is:
Amines and Nitrogen Compounds
- Match List I with List II List-I (Ion) List-II (Group Number in Cation Analysis) A. Co^2+ I. Group-I B. Mg^2+ II. Group-III C. Pb^2+ III. Group-IV D. Al^3+ IV. Group-VI Choose the correct answer from the options given…
Practical Chemistry
- Phosphoric acid ionizes in three steps with their ionization constant values K_a1, K_a2 and K_a3, respectively, while K is the overall ionization constant. Which of the following statements are true? A. log K = log K_a1…
Equilibrium
- Which of the following statements are true? A. Unlike Ga that has a very high melting point, Cs has a very low melting point. B. On Pauling scale, the electronegativity values of N and Cl are not the same. C. Ar, K^+,…
Periodic Classification
- Given below are two statements : Statement I : Like nitrogen that can form ammonia, arsenic can form arsine. Statement II : Antimony cannot form antimony pentoxide. In the light of the above statements, choose the most…
p-Block Elements
- Which of the following aqueous solution will exhibit highest boiling point?
Solutions
- Given below are two statements : Statement-I : Benzenediazonium salt is prepared by the reaction of aniline with nitrous acid at 273 – 278 K. It decomposes easily in the dry state. Statement-II : Insertion of iodine…
Amines and Nitrogen Compounds
- The correct order of decreasing acidity of the following aliphatic acids is
Aldehydes Ketones and Acids
- Which one of the following reactions does NOT belong to "Lassaigne's test"?
Practical Chemistry
- Sugar 'X' A. is found in honey B. is a keto sugar C. exists in α and β – anomeric forms. D. Is laevorotatory. 'X' is :
Biomolecules
- Dalton's Atomic theory could not explain which of the following?
Some Basic Concepts of Chemistry
- Higher yield of NO in N_2(g) + O_2(g) leftharpoons 2NO(g) can be obtained at [Δ H of the reaction = +180.7 kJ mol^-1] A. Higher temperature B. Lower temperature C. Higher concentration of N_2 D. Higher concentration of…
Equilibrium
- Match List-I with List-II List-I List-II A. XeO_3 (I) sp^3d; linear B. XeF_2 (II) sp^3; pyramidal C. XeOF_4 (III) sp^3d^3; distorted octahedral D. XeF_6 (IV) sp^3d^2; square pyramidal Choose the correct answer from the…
Chemical Bonding
- Match List-I with List-II List-I (Example) List-II (Type of Solution) A. Humidity I. Solid in solid B. Alloys II. Liquid in gas C. Amalgams III. Solid in gas D. Smoke IV. Liquid in solid Choose the correct answer from…
Surface Chemistry
- Energy and radius of first Bohr orbit of He^+ and Li^2+ are [Given R_H = 2.18 × 10^-18 J, a_0 = 52.9 pm]
Atomic Structure
- Which among the following electronic configurations belong to main group elements? A. [Ne]3s^1 B. [Ar]3d^34s^2 C. [Kr]4d^105s^25p^5 D. [Ar]3d^104s^1 E. [Rn]5f^06d^27s^2 Choose the correct answer from the option given…
Periodic Classification
- Identify the correct orders against the property mentioned A. H_2O > NH_3 > CHCl_3 – dipole moment B. XeF_4 > XeO_3 > XeF_2 – number of lone pairs on central atom C. O-H > C-H > N-O – bond length D. N_2 > O_2 > H_2 –…
Chemical Bonding
- Total number of possible isomers (both structural as well as stereoisomers) of cyclic ethers of molecular formula C_4H_8O is :
Alcohols Phenols and Ethers
- For the reaction A(g) leftharpoons 2B(g), the backward reaction rate constant is higher than the forward reaction rate constant by a factor of 2500, at 1000 K. [Given : R = 0.0831 L atm mol^-1 K^-1] K_P for the reaction…
Equilibrium
- 5 moles of liquid X and 10 moles of liquid Y make a solution having a vapour pressure of 70 torr. The vapour pressures of pure X and Y are 63 torr and 78 torr respectively. Which of the following is true regarding the…
Solutions
Physics
- The electric field in a plane electromagnetic wave is given by E_z = 60 cos (5x + 1.5 × 10^9 t) V/m. Then expression for the corresponding magnetic field is (here subscripts denote the direction of the field) :
Electromagnetic Waves
- A pipe open at both ends has a fundamental frequency f in air. The pipe is now dipped vertically in a water drum to half of its length. The fundamental frequency of the air column is now equal to:
Oscillations and Waves
- An electron (mass 9 × 10^-31 kg and charge 1.6 × 10^-19 C) moving with speed c/100 (c = speed of light) is injected into a magnetic field B of magnitude 9 × 10^-4 T perpendicular to its direction of motion. We wish to…
Magnetism and Moving Charges
- In a certain camera, a combination of four similar thin convex lenses are arranged axially in contact. Then the power of the combination and the total magnification in comparison to the power (p) and magnification (m)…
Ray Optics
- A 2 amp current is flowing through two different small circular copper coils having radii ratio 1 : 2. The ratio of their respective magnetic moments will be
Magnetism and Moving Charges
- Two gases A and B are filled at the same pressure in separate cylinders with movable pistons of radius r_A and r_B, respectively. On supplying an equal amount of heat to both the systems reversibly under constant…
Thermodynamics
- A container has two chambers of volumes V_1 = 2 litres and V_2 = 3 litres separated by a partition made of a thermal insulator. The chambers contain n_1 = 5 and n_2 = 4 moles of ideal gas at pressures p_1 = 1 atm and…
Kinetic Theory of Gases
- The radius of Martian orbit around the Sun is about 4 times the radius of the orbit of Mercury. The Martian year is 687 Earth days. Then which of the following is the length of 1 year on Mercury?
Gravitation
- To an ac power supply of 220 V at 50 Hz, a resistor of 20 Ω, a capacitor of reactance 25 Ω and an inductor of reactance 45 Ω are connected in series. The corresponding current in the circuit and the phase angle between…
Electromagnetic Induction and AC
- A wire of resistance R is cut into 8 equal pieces. From these pieces two equivalent resistances are made by adding four of these together in parallel. Then these two sets are added in series. The net effective…
Current Electricity
- Two identical charged conducting spheres A and B have their centres separated by a certain distance. Charge on each sphere is q and the force of repulsion between them is F. A third identical uncharged conducting sphere…
Electrostatics
- Consider the diameter of a spherical object being measured with the help of a Vernier callipers. Suppose its 10 Vernier Scale Divisions (V.S.D.) are equal to its 9 Main Scale Divisions (M.S.D.). The least division in…
Physical World and Measurement
- In some appropriate units, time (t) and position (x) relation of a moving particle is given by t = x^2 + x. The acceleration of the particle is
Kinematics
- A particle of mass m is moving around the origin with a constant force F pulling it towards the origin. If Bohr model is used to describe its motion, the radius of the nth orbit and the particle's speed ν in the orbit…
Atoms and Nuclei
- A balloon is made of a material of surface tension S and its inflation outlet (from where gas is filled in it) has small area A. It is filled with a gas of density ρ and takes a spherical shape of radius R. When the gas…
Properties of Matter
- A microscope has an objective of focal length 2 cm, eyepiece of focal length 4 cm and the tube length of 40 cm. If the distance of distinct vision of eye is 25 cm, the magnification in the microscope is
Ray Optics
- Two identical point masses P and Q, suspended from two separate massless springs of spring constants k_1 and k_2, respectively, oscillate vertically. If their maximum speeds are the same, the ratio (A_Q/A_P) of the…
Oscillations and Waves
- A parallel plate capacitor made of circular plates is being charged such that the surface charge density on its plates is increasing at a constant rate with time. The magnetic field arising due to displacement current…
Electromagnetic Waves
- An electric dipole with dipole moment 5 × 10^-6 Cm is aligned with the direction of a uniform electric field of magnitude 4 × 10^5 N/C. The dipole is then rotated through an angle of 60° with respect to the electric…
Electrostatics
- There are two inclined surfaces of equal length (L) and same angle of inclination 45° with the horizontal. One of them is rough and the other is perfectly smooth. A given body takes 2 times as much time to slide down on…
Laws of Motion
- De-Broglie wavelength of an electron orbiting in the n = 2 state of hydrogen atom is close to (Given Bohr radius = 0.052 nm)
Atoms and Nuclei
- The Sun rotates around its centre once in 27 days. What will be the period of revolution if the Sun were to expand to twice its present radius without any external influence? Assume the Sun to be a sphere of uniform…
Rotational Motion
- The plates of a parallel plate capacitor are separated by d. Two slabs of different dielectric constant K_1 and K_2 with thickness 3/8d and d/2, respectively are inserted in the capacitor. Due to this, the capacitance…
Electrostatics
- A ball of mass 0.5 kg is dropped from a height of 40 m. The ball hits the ground and rises to a height of 10 m. The impulse imparted to the ball during its collision with the ground is (Take g = 9.8 m/s^2)
Laws of Motion
- Two cities X and Y are connected by a regular bus service with a bus leaving in either direction every T min. A girl is driving scooty with a speed of 60 km/h in the direction X to Y notices that a bus goes past her…
Kinematics
- An oxygen cylinder of volume 30 litre has 18.20 moles of oxygen. After some oxygen is withdrawn from the cylinder, its gauge pressure drops to 11 atmospheric pressures at temperature 27°C. The mass of the oxygen…
Kinetic Theory of Gases
- A model for quantized motion of an electron in a uniform magnetic field B states that the flux passing through the orbit of the electron is n(h/e) where n is an integer, h is Planck's constant and e is the magnitude of…
Magnetism and Moving Charges
- A body weighs 48 N on the surface of the earth. The gravitational force experienced by the body due to the earth at a height equal to one-third the radius of the earth from its surface is :
Gravitation
- The intensity of transmitted light when a polaroid sheet, placed between two crossed polaroids at 22.5° from the polarization axis of one of the polaroids, is (I_0 is the intensity of polarised light after passing…
Wave Optics
- A photon and an electron (mass m) have the same energy E. The ratio (λ_photon/λ_electron) of their de Broglie wavelengths is: (c is the speed of light)
Dual Nature of Radiation
- An unpolarized light beam travelling in air is incident on a medium of refractive index 1.73 at Brewster's angle. Then
Wave Optics
- A uniform rod of mass 20 kg and length 5 m leans against a smooth vertical wall making an angle of 60° with it. The other end rests on a rough horizontal floor. The friction force that the floor exerts on the rod is…
Rotational Motion
- The kinetic energies of two similar cars A and B are 100 J and 225 J respectively. On applying breaks, car A stops after 1000 m and car B stops after 1500 m. If F_A and F_B are the forces applied by the breaks on cars A…
Work Energy and Power
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