A solid sphere of mass m and radius R is rotating about its diameter. A solid cylinder of the same mass and sameradiusis also rotating about its geometrical axis with an angular speed twice that of the sphere. The ratio of their kinetic energies of rotation $$(\frac{E_{sphere}}{E_{cylinder}})$$ will be:
NEET 2016
For the following questions answer them individually
A light rod of length l has two masses $$m_1$$ and $$m_2$$ attatched to its two ends. The moment of inertia of the system about an axis perpendicular to the rod and passing through the center of mass is
Starting from the centre of the earth having radius R, the variation of g (accelaration) due to gravity) is shown by
A satellite of mass m is orbiting the earth (of radius R) at a height h from its surface. The total energy of the satellite in terms of $$g_0$$, the value of acceleration due to gravity at the earth's surface, is
A rectangular film of liquid is extended from $$(4cm\times2cm)$$ to $$(5cm\times4cm)$$. If the work done is $$3\times10^{-4}$$ J, the value of the surface tension of the liquid is
Three liquids of densities $$p_1,p_2$$ and $$p_3$$ (with $$p_1>p_2>p_3$$ ), having the same value of surface tension T, rise to the same height in three identical capillaries. The angles of contact $$\theta_1,\theta_2$$ and $$\theta_3$$ obey
Two identical bodies are made of a material for which the heat capacity increases with temperature. One of these is at $$100^\circ C$$, while the other one is at $$0^\circ C$$. If the two bodies are brought into contact, then, assuming no heat loss, the final common temperature is
A body cools from a temperature 3T to 2T in 10 minutes. The room temperature is T. Assume that Newton’s law of cooling is applicable. The temperature of the body at the end of next 10 minutes will be
One mole of an ideal monatomic gas undergoes a process described by the equation $$PV^3$$ = constant. The heat capacity of the gas during this process is
The temperature inside a refrigerator is $$t_{2}^0c$$ and the room temperature is $$t_{1}^0c$$. The amount of heat delivered to the room for each joule of electrical energy consumed ideally will be
A given sample of an ideal gas occupies a volume V at a pressure P and absolute temperature T. The mass of each molecule of the gas is m. Which ofthe following gives the density of the gas ?
A body of mass m is attached to the lower end of a spring whose upper end is fixed. The spring has negligible mass. When the mass m is slightly pulled down andreleased, it oscillates with a time period of 3s. When the mass m is increased by 1kg, the time period of oscillations becomes 5s. The value of m in kg is
The second overtone of an. open organ pipe has the same frequency as the first overtone of a closedpipe L metre long. The length of the open pipe will be
Three sound waves of equal amplitudes have frequencies $$(n-1)$$, n, $$(n+1)$$. They superimpose to give beats. The number of beats produced per second will be
An electric dipole is placed at an angle of $$30^0c$$ with an electric field intensity $$2\times10^5\frac{N}{C}$$. It experiences a torque equal to 4Nm. The charge on the dipole, if the dipole length is 2 cm,is
A parallel-plate capacitor of area A, plate separation d and capacitance C is filled with four dielectric materials having dielectric constants $$k_1,k_2,k_3$$ and $$k_4$$ as shown in the figure below. If a single dielectric material is to be used to have the same capacitance C in this capacitor, then its dielectric constant k is given by
The potential difference $$(V_A-V_B)$$ between the points A and in the given figure is:
A filament bulb (500 W, 100 V) is to be used in a 230 V main supply. Whena resistance R is connected in series, it works perfectly and the bulb consumes 500 W. Thevalue of R is:
A long wire carrying a steady currentis bent into a circular loop of one turn. The magnetic field at the centre of the loop is B It is then bent into a circular coil of n turns. The magnetic field at the centre of this coil of n turns will be
A bar magnetis hung by a thin cotton thread in a uniform horizontal magnetic field and is in equilibrium state. The energy required to rotate it by $$60^0$$ is W. Now the torque required to keep the magnet in this new position is
An electron is moving in a circular path under the influence of a transverse magnetic field of $$3.57\times10^{-2}T$$. If the value of $$\frac{e}{m}$$ is $$1.76\times10^{11}\frac{c}{kg}$$, the frequency of revolution of the electron is
Which of the following combinations should be selected for better tuning of an L-C-R circuit used for communication?
A uniform magnetic field is restricted within a region of radius r. The magnetic field changes with time at a rate $$\frac{\overrightarrow{dB}}{dt}$$. Loop 1 of radius $$R>r$$ encloses the region r and loop 2 of radius R is outside the region of magnetic field as shown in the figure below. Then the e.m.f. generated is
The potential differences across the resistance, capacitance and inductance are 80 V, 40 V and 100 V respectively in an L-C-R circuit. The power factor of this circuit is
A $$100Ω$$ resistance and a capacitor of $$100Ω$$ reactance are connected in series across a 220 V source. When the capacitor is 50% charged, the peak value of the displacement current is
Two identical glass $$(\mu_{g}=\frac{3}{2})$$ equiconvex lenses of focal length f each are kept in contact. The space between the two lenses is filled with water $$(\mu_{w}=\frac{4}{3})$$. The focal length of the combination is
An air bubble in a glass slab with refractive index 1.5 (near normal incidence) is 5 cm deep when viewed from one surface and 3cm deep when viewed from the opposite face. The thickness (in cm) of the slab is
The interference pattern is obtained with two coherent light sources of intensity ratio n. In the interference pattern, the ratio $$\frac{I_{max}-I_{min}}{I_{max}+I_{min}}$$ will be
A person can see clearly objects only when they lie between 50 cm and 400 cm from his eyes. In order to increase the maximum distance of distinct vision to infinity, the type and powerof the correcting lens, the person has to use, will be
A linear aperture whose width is 0.02 cm is placed immediately in front of a lens of focal length 60cm. The aperture is illuminated normally by a parallel beam of wavelength $$5\times10^{-5}$$ cm. The distance of the first dark band of the diffraction pattern from the centre of the screen is
Electrons of mass m with de-Broglie wave length $$\lambda$$ fall on the target in an X-ray tube. The cutoff wavelength $$(\lambda_0)$$ of the emitted X-ray is
Photons with energy 5eV are incident on a cathode C in a photoelectric cell. The maximum energy of emitted photoelectrons is 2 eV. When photons of energy 6 eV are incident on C, no photoelectrons will reach the anode A, if the stopping potential of A relative to C is
If an electron in a hydrogen atom jumps from the 3rd orbit to the 2nd orbit, it emits a photon of wavelength $$\lambda$$. When it jumps from the 4th orbit to the 3rd orbit, the corresponding wavelength of the photon will be
The half-life of a radioactive substance is 30 minutes. The time (in minutes) taken between 40% decay and 85% decay of the same radioactive substance is
For CE transistor amplifier, the audio signal voltage across the collector resistance of $$2kΩ$$ is 4 V. If the current amplification factor of the transistor is 100 and the base resistance is $$1kΩ$$, then the input signal voltage is
The given circuit has two ideal diodes connected as shown in the figure below. The current flowing through the resistance $$R_1$$, will be
What is the output Y in the following circuit, when all the three inputs A, B, C are first O and then 1?
Planck’s constant (h), speed of light in vacuum (c) and Newton’s gravitational constant (G) are three fundamental constants. Which of the following combinations of these has the dimension of length ?
Two cars P and Q start from a point at the same time in a straight line and their positions are represented by $$x_P(t)=at+bt^2$$ and $$x_Q(t)=ft-t^2$$. At what time do the cars have the same velocity?
In the given figure, $$a=15 \frac{m}{s^2}$$ represents the total acceleration of a particle moving in the clockwise direction in a circle of radius R=2.5 m at a given instant of time. The speed of the particle is
A rigid ball of mass strikes a rigid wall at $$60^0$$ and gets reflected without loss of speed as shown in the figure below. The value of impulse imparted by the wall on the ball will be
A bullet of mass 10g moving horizontally with a velocity of $$400 ms^{-1}$$ strikes a wooden block of mass 2 kg which is suspended by a light inextensible string of length 5 m. As a result, the centre of gravity of the block is found to rise a vertical distance of 10 cm. The speed of the bullet after it emerges out horizontally from the block will be
Two identical balls A and B having velocities of $$0.5\frac{m}{s}$$ and $$-0.3\frac{m}{s}$$ respectively collide elastically in one dimension. The velocities of B and A after the collision respectively will be
A particle moves from a point $$(-2\widehat{i}+5\widehat{j})$$ to $$(4\widehat{j}+3\widehat{k})$$ when a force of $$(4\widehat{i}+3\widehat{j})N$$ is applied. How much work has been done by the force?
Two rotating bodies A and B of masses m and 2m with moments of inertia $$I_A$$ and $$I_B(I_B>I_A)$$ have equal kinetic energy of rotation. If $$L_A$$ ans $$L_B$$ be their angular momenta respectively, then
A non-proteinaceous enzyme is
Select the mismatch.
Select the wrong statement.
A cell organelle containing hydrolytic enzymes is
During cell growth, DNA synthesis takes place in
Which of the following biomolecules is common to respiration-mediated breakdown of fats, carbohydrates and proteins?
A few drops of sap werecollected by cutting across a plant stem by a suitable method. The sap was tested chemically. Which one of the following test results indicates that it is phloem sap?
You are given a tissue with its potential for differentiation in an artificial culture. Which of the following pairs of hormones would you add to the medium to secure shoots as well as roots?
Phytochrome is a
Whichis essential for the growth of root tip?
The process which makes major difference between $$C_3$$ and $$C_4$$ plants is
Which oneof the following statements is no correct?
Which one of the following generates new genetic combinations leading to variation?
Match Column—I with Column—II and select the correct option using the codes given below:
In majority of angiosperms
Pollination in water hyacinth and water lily is broughtabout by the agency of
The ovule of an angiosperm is technically equivalent to
Taylor conducted the experiments to prove semiconservative mode of chromosome replication on
The mechanism that causes a gene to move from one linkage groupto anotheris called
The equivalent of a structural gene is
A true breeding plant is
Which of the following rRNAs acts as structural RNA as well as ribozyme in bacteria?
Stirred-tank bioreactors have been designed for
A foreign DNA and plasmid cut by the same restriction endonuclease can be joined to form a recombinant plasmid using
Whichof the following is not a component of downstream processing?
Which of the following restriction enzymes produces blunt ends
Which kind of therapy wasgiven in 1990 toa four-year-old girl with adenosine deaminase (ADA) deficiency?
How many hot spots of biodiversity in the world have been identified till date by Norman Myers?
The primary producers of the deep-sea hydrothermal vent ecosystem are
Which of the following is correct for r-selected species?
If '+' sign is assigned to beneficial interaction, '-' sign to detrimental and '0' sign to neutral interaction, then the population interaction represented by '+' '-' refers to
Which of the following is correctly matched?
Red List contains data or information on
Which one of the following is wrong for fungi?
Methanogens belong to
Select the wrong statement.
The label of a herbarium sheet does not carry information on
Conifers are adapted to tolerate extreme environmental conditions because of
Which one of the following statements is wrong ?
The term ‘polyadelphous’is related to
How many plants among Indigofera, Sesbania, Salvia, Allium, Aloe, mustard, groundnut, radish, gram and turnip have stamens with different lengths in their flowers?
Radial symmetry is found in the flowers of
Free-central placentation is found in
Cortex is the region found between
The balloon-shapedstructurescalled tyloses
Match the stages of meiosis in Column—Ito their characteristic features in Column—II and select the correct option using the codes given below :
Which hormones’ do stimulate’ the production of pancreatic juice and bicarbonate?
The partial pressure of oxygen in the alveoli of the lungs is
Choose the correct statement.
Grave's disease is caused due to
Namethe ion responsible for unmasking of active sites for myosin for cross-bridge activity during muscle contraction.
Name the blood cells, whose reduction in numbercan causeclotting disorder, leading to excessive loss of blood from the body.
Name a peptide hormone which acts mainly on hepatocytes, adipocytes and enhances cellular glucose uptake and utilization.
Osteoporosis, an age-related disease of skeletal system, may occur due to
Serum differs from blood in
Lungs do not collapse between breaths and some air always remains in the lungs which can never be expelled because
The posterior pituitary gland is not a ‘true’ endocrine gland because
The part of nephron involved in active reabsorption of sodium is
Which of the following is hormone releasing IUD?
Which ofthe following is incorrect regarding vasectomy?
Embryo with more than 16 blastomeres formed due to in vitro fertilization is transferred into
Which of the following depicts the correct pathway of transport of sperms?
Match Column—I with Column—II and select the correct option using the codes following is hormonegiven below :
Several hormones like hCG, hPL, estrogen, progesterone are produced by
If a colour-blind man marries a woman who is homozygous for normal colour vision, the probability of their son being colour-blind is
Genetic drift operates in
In Hardy-Weinberg equation, the frequency of heterozygous individual is represented by
The chronological order of human evolution from early to the recent is
Which of the following is the correct sequence of events in the origin oflife?
i. Formation of protobionts
ii. Synthesis of organic monomers
iii. Synthesis of organic polymers
iv. Formation of DNA-based genetic systems
A molecule that can act as a genetic material mustfulfill the traits given below, except
DNA-dependent RNA polymerase catalyzes transcription on one strand of the DNA which is called the
Interspecific hybridization is the mating of
Which of the following is correct regarding AIDS causative agent HIV?
Among the following edible fishes, which one is a marine fish having rich source of omega-3 fatty acids?
Match Column—I with Column—II and select the correct option using the codes given below :
Biochemical Oxygen Demand (BOD) may not be a good indexfor pollution for water bodies receiving effluents from
The principle of competitive exclusion was stated by
Which of the following National Parks is home to the famous musk deer or hangul?
A lake which is rich in organic waste may result in
The highest DDT concentration in aquatic food chain shall occur in
Which of the following sets of diseases is caused by bacteria?
Match Column—I with Column—II for housefly classification and select the correct option using the codes given below :
Choose the correct statement.
Study the four statements (A-D) given below and select the two correct ones outof them :
A. Definition of biological species was given by Ernst Mayr.
B. Photoperiod does not affect reproduction in plants.
C. Binomial nomenclature system was given by R. H. Whittaker.
D. In unicellular organisms, reproduction is synonymous with growth
The two correct statements are
In male cockroaches, sperms are stored in which part of the reproductive system?
Smooth muscles are
Oxidative phosphorylation is
Whichof the followingis the least likely to be involved in stabilizing the three-dimensional folding of most proteins?
Which of the following describes the given graph correctly?
When cell has stalled DNA replication fork, which checkpoint should be predominantly activated?
Which one of the following is incorrect for ideal solution?
The solubility of AgCl(s) with solubility product $$1.6 \times 10^{-10}$$ in $$0.1 M Nacl$$ solution would be
Suppose the elements $$X$$ and $$Y$$ combine to form two compounds $$XY_2$$ and $$X_3Y_2$$. When 0-1 mole of $$XY_2$$ weighs 10 g and 0-05 mole of $$X_3Y_2$$ weighs 9g, the atomic weights of $$X$$ and $$Y$$ are
The number of electrons delivered at the cathode during electrolysis by a current of lampere in 60 seconds is (charge on electron $$= 1.60 \times 10^{-19}$$ C)
Boric acid is an acid because its molecule
$$AIF_{3}$$ is soluble in HF only in presence of KF.It is due to the formation of
Zinc can be coated on iron to produce galvanized iron but the reverse is not possible. It is because
The suspension of slaked lime in water is known as
The hybridizations of atomic orbitals of nitrogen in $${NO_{2}}^{+},{NO_{3}}^{-} and {NH_{4}}^{+}$$ respectively are
Which of the following fluro-compounds is most likely to behave as Lewis base?
Which of the following pair of ions is isoelectronic and isotructural?
In context with berylium,Which one of the following statements is incorrect?
Hot concentrated sulphuric acid is a moderately strong oxidizing agent. Which of the following reactions does not show oxidizing behaviour?
Which of the following pairs of d orbitals will have electron density along the axes?
The correct geometry and hybridization for $$XeF_{4}$$ are
Among the following ,which one is a wrong statement ?
The correct increasing order of trans-effect of the following species is
Which of the following statements related to lanthanos is incorrect?
Jahn-Teller effect is mot observed in high moderately strong oxidizing agent. Which of spin complexes of
Which of the following can be used as the halide component for Friedel-Crafts reaction?
In which of the following molecules ,all atoms are coplanar?
Which of the following structure represents nylon 6,6 POlymer?
In the phyrrole
the electron density maximum on
Which of the following compounds shall not produce propene by reaction with HBr followed by elimination or direct only elimination reaction?
Which one of the following nitro-compounds does not react with nitrous acid?
The central dogma of molecular genetics States that the genetic information flows from
The correct corresponding order of names of four aldoses with configuration given below:
In the given reaction
A given nitrogen-containing aromatic compound reacts with Sn/HCI, followed by $$HNO_2$$, to give an unstable compound B. B, on treatment with phenol, forms a beautiful coloured compound C with the molecular formula $$C_{12}H_{10}N_2O$$. The structure of compound A is
Consider the reaction
$$CH_3CH_2CH_2Br + NaCN \rightarrow CH_3CH_2CH_2CN + NaBr$$
This reaction will be the fastest in
The correct structure of the product A formed in the reaction
Which among the given molecules can exhibit tautomerism?
The correct order of strengths of the carboxylic acids
The compound that will react most readily with gaseous bromine has the formula
Which one of the following compounds shows the presence of intramolecular hydrogen bond?
The molar conductivity of a $$0.5 mol /dm^3$$ solution of $$AgNO_3$$, with electrolytic conductivity of $$5.76 \times 10^{-3} S cm^{-1}$$ at 298 K is
The decomposition of phosphine $$(PH_3)$$ on tungsten at low pressure is a first-order reaction. It is because the
The coagulation values in millimoles per litre of the electrolytes used for the coagulation of $$As_2S_3$$ are given below:
I. $$(NaCl) = 52$$
II. $$(BaCl_2) = 0.69$$
III. $$(MgSO_4) = 0.22$$
The correct order of their coagulating power is
During the electrolysis of molten sodium chloride, the time required to produce 0.10 mol of chlorine gas using a current of 3 amperesis
How manyelectrons canfit in the érbital for which n = 3 and l = 1?
For a sample of perfect gas when its pressure is changed isothermally from $$p_i$$ to $$p_f$$, the entropy change is given by
The van’t Hoff factor(i) for a dilute aqueous solution of the strong electrolyte barium hydroxide is
The percentage of pyridine $$(C_5H_5N)$$ that forms pyridinium ion $$(C_5H_5N^{+}H)$$ in a 0.10 M aqueous pyridine solution ($$K_b$$ for $$C_5H_5N = 1.7 \times 10^{-9}$$) is
In calcium fluoride, having the fluorite structure, the coordination numbers for calcium ion $$(Ca^{2+})$$ and fluoride ion $$(F^{-})$$ are
If the $$E_{cell}^{\circ}$$ for a given reaction has a negative value, which of the following gives the correct relationships for the values of $$\triangle G^\circ$$ and $$K_{eq}$$?
