Please wait...
LPU University Admission 2025 - 100% Scholarship - Apply Now Check Here
UPES University Admission 2025 - 100% Scholarship - Apply Now Check Here
An ac source of angular frequency w is fed across a resistor r and a capacitor C in series.
The current registered user is I. If now the frequency of source is changed to ω/3 (but maintaining the same voltage), the current in the circuit is found to be halved. Calculate the ratio of reactance to resistance at the original frequency ω
One of the lines in the emission spectrum of Li2+ has the same wavelength as that of the 2nd line of the Balmer series in the hydrogen spectrum. The electronic transition corresponding to this line is n = 12 → n = x. Find the value of x.
The potential difference across the terminals of a battery is 50 V when 11A current is drawn and 60 V when 1A current is drawn. The e.m.f. and the internal resistance of the battery are
In a photoelectric effect measurement, the stopping potential for a given metal is found to be V0 when radiation of wavelength λ0 is used. If radiation of wavelength 2 λ0 is used with the same metal, the stopping potential (in volt) is
The charges on two spheres are +7µC and –5µC respectively. They experience a force F. If each of them is given and additional charge of –2µC, the new force of attraction will be
The current in an induction coil varies with time t according to the graph shown in figure.
Which of the following graphs shows the induced emf (E) in the coil with time?
A lamp emits monochromatic green light uniformly in all directions. The lamp is 3% efficient in converting electrical power to electromagnetic waves and consumes 100 W of power. The amplitude of the electric field associated with the electromagnetic radiation at a distance of 5 m from the lamp will be nearly:
Two thin wire rings each having a radius R are placed at a distance d apart with their axes coinciding. The charges on the two rings are +q and –q. The potential difference between the centers of the two rings is
The variation of acceleration due to gravity g with distance d from center of the earth is best represented by (R = Earth's radius):
Two spherical bodies of mass M and 5M and radii R & 2R respectively are released in free space with initial separation between their centers equal to 12 R. If they attract each other due to gravitational force only, then the distance covered by the smaller body just before collision is
A block A of mass 7 kg is placed on a frictionless table. A thread tied to it passes over a frictionless pulley and carries a body B of mass 3 kg at the other end. The acceleration of the system is (given g = 10 ms–2)
When a piece of a ferromagnetic substance is put in a uniform magnetic field, the flux density inside it is four times the flux density away from the piece. The magnetic permeability of the material is
Two tubes of radii r1 and r2, and lengths l1 and l2, respectively, are connected in series and a liquid flows through them in streamline conditions. P1 and P2 are pressure differences across the two tubes. If P2 is 4P1 and l2 is l1/4, then the radius r2 will be equal to:
What will be the volume contraction of a solid copper cube, 10 cm on an edge when subjected to a hydraulic pressure of 7 × 106 Pa? Bulk modulus of copper = 140 GPa
An object is projected with a velocity of 20 m/s making an angle of 45° horizontally. The equation for the trajectory is h = Ax – Bx2 where h is height, x is horizontal distance, A and B are constants. The ratio A : B is (g = 10 ms–2)
A particle accelerates from rest at a constant rate for some time and attains a velocity of 8 m/sec. Afterwards it decelerates at a constant rate and comes to rest. If the total time taken is 4 sec, the distance traveled is
The distance between the wires of electric mains is 12 cm. These wires experience 4 mg wt. per unit length. The value of current flowing in each wire will be [assume equal current flows in both wires]
The radius of germanium (Ge) nuclide is measured to be twice the radius of 94 Be . The number of nucleons in Ge are
A simple harmonic wave having an amplitude and time period T is represented by the equation y = 5 sin p(t + 4)m. Then the value of amplitude (a) in (m) and time period (T) in second are [y is in (m) and t is in (sec)]
For a prism kept in air it is found that for an angle of incidence 60°, the angle of prism A, angle of deviation δ and angle of emergence ‘e’ become equal. Then the refractive index of the material of prism is
A diode having potential difference 0.5 V across its junction which does not depend on current, is connected in series with resistance of 20Ω across source. If 0.1 A current passes through resistance then what is the voltage of the source?
The angular velocity of a body changes from ω1 to ω2 without applying a torque but by changing the moment of inertia about its axis of rotation.
The ratio of its corresponding radii of gyration is
A waterfall is 84 m high. If half of the potential energy of the falling water gets converted to heat, the rise in temperature of water will be
4 kg of oxygen gas is heated so as to raise its temperature from 20 to 120°C. If the heating is done at constant pressure, the external work done by the gas is (Cp = 0.219 cal/g°C and Cv = 0.157 cal/g°C)
In a Young’s double slit experiment with light of wavelength λ the separation of slits is d and distance of screen is D such that D >> d >> λ. If the fringe width is β, the distance from point of maximum intensity to the point where intensity falls to half of maximum intensity on either side is:
A pipe of length 85 cm is closed from one end. Find the number of possible natural oscillations of the air column in the pipe whose frequencies lie below 1250 Hz. The velocity of sound in air is 340 m/s.
The bob A of a simple pendulum is released when the string makes an angle of 45° with the vertical. It hits another bob B of the same material and same mass kept at rest on the table. If the collision is elastic
A battery is charged at a potential of 15V for 8 hours when the current flowing is 10A. The battery on discharge supplies a current of 5A for 15 hours. The mean terminal voltage during discharge is 14V. The “watt-hour” efficiency of the battery is
There is an electric field E in x-direction. If the work done on moving a charge of 0.2 C through a distance of 2 m along a line making an angle 60° with x-axis is 4 J, then what is the value of E?
A solenoid has 2000 turns wound over a length of 0.3 m. Its cross-sectional area is 1.2 × 10–3 m2. Around its central section a coil of 300 turns is wound. If an initial current of 2 A flowing in the solenoid is reversed in 0.25 s, the emf induced in the coil will be
An electromagnetic wave of frequency 1 × 1014 hertz is propagating along the z-axis. The amplitude of the electric field is 4 V/m. If ∈0 = 8.8 × 10–12 C2/Nm2, then average energy density of electric field will be:
In the degree of freedom of a gas are f, then the ratio of two specific heats CP/CV is given by
The total energy of a particle executing S.H. M. is 80 J. What is the potential energy when the particle is at a distance of 3/4 of amplitude from the mean position?
Two bodies of masses 2 kg and 4 kg are moving with velocities 2 m/s and 10 m/s respectively along the same direction. Then the velocity of their center of mass will be
The end correction of a resonance column is 1cm. If the shortest length resonating with the tuning fork is 10cm, the next resonating length should be
Two identical cells connected in series send 1.0A current through a 5 Ω resistor. When they are connected in parallel, they send 0.8 A current through the same resistor. What is the internal resistance of the cell?
When photons of wavelength λ1 are incident on an isolated sphere, the corresponding stopping potential is found to be V. When photons of wavelength λ2 are used, the corresponding stopping potential was thrice that of the above value. If light of wavelength λ3 is used then find the stopping potential for this case :
Two particles of equal mass go round a circle of radius R under the action of their mutual gravitational attraction. The speed of each particle is
A body of weight 2kg is suspended as shown in the figure. The tension T1 in the horizontal string (in kg wt) is
A motor car moving with a uniform speed of 20 m/sec comes to stop on the application of brakes after traveling a distance of 10 m, its acceleration is
A proton (mass = 1.67 × 10–27 kg and charge = 1.6 × 10–19 C) enters perpendicular to a magnetic field of intensity 2 weber/m2 with a velocity 3.4 × 107 m/sec. The acceleration of the proton should be
A car is fitted with a convex side-view mirror of focal length 20 cm. A second car 2.8 m behind the first car is overtaking the first car at a relative speed of 15 m/s. The speed of the image of the second car as seen in the mirror of the first one is:
In the equation PVy = constant, the value of y is unity. Then the process is
A ball of mass 2 kg and another of mass 4 kg are dropped together from a 60 feet tall building. After a fall of 30 feet each towards earth, their respective kinetic energies will be in the ratio of
The wavelength of radiation is λ0 when an electron jumps from the third to second orbit of the hydrogen atom. For the electron to jump from the fourth to the second orbit of the hydrogen atom, the wavelength of radiation emitted will be
What is formed when a primary alcohol undergoes catalytic dehydrogenation?
Which of the following statements is false?
The radius of the hydrogen atom in the ground state is 0.53 Å. The radius of Li2+ ion (atomic number = 3) in a similar state is
Match the vitamin of column I with deficiency disease given in column II
The correct relation between the bond lengths a and b is:
An ether is more volatile than an alcohol having the same molecular formula. This is due to
An exothermic reaction A → B has an activation energy of 17 kJ per mole of A. The heat of the reaction is 40 kJ. Calculate the activation energy for the reverse reaction B → A.
A drug effective in the treatment of pneumonia, bronchitis, etc, is
Select correct match:
The transition metal ions responsible for color in ruby and emerald are, respectively:
250 mL of a waste solution obtained from the workshop of a goldsmith contains 0.1 M AgNO3 and 0.1 M AuCl. The solution was electrolyzed at 2 V by passing a current of 1 A for 15 minutes.
The metal/metals electrodeposited will be :
An increase in CO2 concentration in the atmosphere will result in
When chlorine is passed through propane at 400°C, which of the following is formed?
Which of the following compounds can best be prepared by Wurtz reaction?
At a certain temperature, only 50% HI is dissociated at equilibrium in the following reaction: 2HI(g) ⇌ H2(g) + I2(g). The equilibrium constant for this reaction is:
α, v and u represent most probable velocity, average velocity and root mean square velocity respectively of a gas at a particular temperature.
The correct order among the following is
The number of hydrogen atoms present in 25.6 g of sucrose (C12H22O11) which has a molar mass of 342.3 g is:
A gas that cannot be collected over water is
The process involving heating of rubber with sulfur is called
Which of the following bicarbonate is least soluble in water?
Potassium fluoride has NaCl type structure. What is the distance between K+ and F– ions if the cell edge is ‘a’ cm?
The value of P° for benzene is 640 mm of Hg. The vapor pressure of solution containing 2.5g substance in 39g benzene is 600mm of Hg. The molecular mass of X is –
The size of particles in suspension, true solution and colloidal solution varies in the order
A system absorbs 10 kJ of heat and does 4 kJ of work. The internal energy of the system
Acetanilide on nitration followed by alkaline hydrolysis mainly gives –
What is the IUPAC name of the compound?
Which one of the following octahedral complexes will not show geometric isomerism? (A and B are monodentate ligands)
Which of the following ions has the maximum magnetic moment?
Aluminum oxide may be electrolysed at 1000 °C to furnish aluminum metal (At. Mass = 27 amu; 1 Faraday = 96,500 Coulombs). The cathode reaction is Al3+ + 3e– → Al
To prepare 5.12kg of aluminum metal by this method would require
Peroxyacetyl nitrate (PAN), an eye irritant is produced by:
The major product of the following reaction is:
The major product obtained in the ph oto catalyzed bromination of 2-methylbutane is
The compressibility factor for H2 and He is usually:
Natural rubber is a polymer of
Doping of silicon (Si) with boron (B) leads to :
Maleic acid and fumaric acids are
In BrF3 molecule, the lone pairs occupy equatorial positions to minimize
In the reversible reaction
the rate of disappearance of NO2 is equal to
Among the following pairs of ions, lower oxidation state in aqueous solution is more stable than the other in
Ultraviolet radiation is absorbed by
Butene-1 may be converted to butane by reaction with
Conjugate acid of NH2– is
Match the columns
The shape of XeO2F2 molecule is
The shape of methyl carbanion is similar to that of –
A botanist discovered a mutant plant that was unable to produce materials that form a casparian strip. This plant would
Match the following and choose the correct combination from the options given.
Assume a thylakoid is somehow punctured so that the interior of the thylakoid is no longer separated from the stroma. This damage will have the most direct effect on which of the following processes?
Degradation of sugar and fat to acetyl CoA will not take place if the following organelle is not present in a eukaryotic cell. Identify the organelle.
Auxin originates at the tip of the stem and controls growth elsewhere. The movement of auxin is largely
Analyze the following pairs and identify the correct option given. I. Choromoplasts - Contains pigments other than chlorophyll II. Leucoplasts - Devoid of any pigments III. Amyloplasts - Store proteins IV. Aleuroplasts - Store oils and fats V. Elaioplasts - Store carbohydraes
Which are the correct combinations ?
Identify types of vascular bundles.
Binomial nomenclature means writing the name of a plant into two names. These two names refer to
Match the following
______ shows the relation between producers and consumers in an ecosystem in a graphical manner in the form of a pyramid.
Which one of the following is related to Ex-situ conservation of threatened animals and plants?
Which of the following is not one of the prime health risks associated with greater UV radiation through the atmosphere due to depletion of stratospheric ozone?
Match the following:
In some organisms, karyokinesis is not followed by cytokinesis as a result of which, a multinucleate condition arises leading to the formation of syncytium. The perfect example for this is
Why is inarching an improved method of vegetative multiplication?
Ion exchange is an important process that facilitates the uptake of nutrients by plants. Which of the following statements about ion exchange is false?
Electrons excited by absorption of light in PSI are transferred to the primary acceptors, and therefore must be replaced. The replacements come directly from
The expressions given below shows the summary equations.
Categorise the summary equations under respective phases.
Match the following and select the correct answer:
Choose the correct combinations
The annular and spirally thickened conducting elements generally develop in the protoxylem when the root or stem is:
Which one of the taxonomic aids can give a comprehensive account of complete compiled information of any one genus or family at a particular time?
The first plants to appear after a forest fire are the ferns, this is because of the survival of their
Dachigam Wildlife Sanctuary in Kashmir is associated with
Which one of the following is not correct as regards to the harmful effects of particulate matter of the size 2.5 micrometers or less?
Raphe is
Which of the following terms or phrases would not be associated directly with photosystem II in plants ?
Which one of the following options is incorrect?
In woody trees, the exchange of gasses between the outer atmosphere and the internal tissue of the stem takes place through
Which is the correct combination ?
Identified A, B, C and D of a nutrient cycle.
Rachel Carson’s famous book, ‘Silent Spring’ is related to
The animal husbandry deals with the care, breeding and management of
On culturing the young anther of a plant a botanist got a few diploid plants along with haploid plants. Which of the following might have given rise to diploid plants?
The diagram below represents an experiment with isolated chloroplasts. The chloroplasts were first made acidic by soaking them in a solution at pH 4. After the thylakoid space reached pH 4, the chloroplasts were transferred to a basic solution at pH 8. The chloroplasts are then placed in the dark. Which of these compounds would you expect to be produced?
At the end of the Krebs cycle, but before the electron transport chain, the oxidation of glucose has produced a net gain of
The method that renders the seed coat permeable to water so that embryo expansion is not physically retarded is called
The following diagram shows some of the missing structures in a plant cell (A - E). Choose the correct option.
Choose the correct option for A, B and C.
Consider the following statements and choose the correct option.
A. The thread-like cytoplasmic strands, running from one cell to another are known as plasmodesmata.
B. Xylem and phloem constitute the vascular bundle of the stem.
C. The first form xylem elements are described as metaxylem.
D. Radial vascular bundles are mainly found in the leaves.
In the vast marine ecosystem, certain seas develop red colouration. This red color is due to the presence of a large population of which one of the following organisms?
Match the following columns.
A plant cell has the potential to develop into a full plant. This property of the plant cell is called
If for some reason the parietal cells of the gut epithelium become partially non-functional, what is likely to happen?
When you hold your breath, which of the following gas changes in blood would first lead to the urge to breathe?
Consider the following statements about biomedical technologies:
A. During open heart surgery blood is circulated in the heart-lung machine
B. Blockage in coronary arteries is removed by angiography
C. Computerized Axial Tomography (CAT) shows detailed internal structure as seen in a section of body
D. X-ray provides clear and detailed images of organs like prostate glands and lungs
Which two of the above statements are correct?
Match the animals with their corresponding excretory structures.
Select the correct statement regarding the specific disorder of muscular or skeletal system:
In rabbit, optic lobes are small because the eye sight is controlled by
Secretion of which of the following structure is preparing inner wall of uterus of implantation
Which of the following is the best evidence for the lock and key theory of enzymatic action
The figure shows four animals (A), (B), (C) and (D). Select the correct answer with respect to a common characteristics of two of these animals
Out of the four basic types of tissues, which is not the one ?
Which one of the following is the correct matching of the events occurring during Menstrual cycle?
Using which contraceptive also provides protection from contracting STDs and AIDS ?
Mark the correct statement/option
Patients suffering from cholera are given a saline drip because
The fruit fly Drosophila melanogaster was found to be very suitable for experimental verification of chromosomal theory of inheritance by Morgan and his colleagues because:
If the volume of CO2 liberated during respiration is more than the volume of O2 used, the respiratory substrate will be :
In a standard ECG, which one of the following alphabets is the correct representation of the respective activity of the human heart?
Atrial natriuretic factor (ANF) is released in response to the increase in blood volume and blood pressure. Which of the following is not the function of ANF?
Parkinson’s disease (characterized by tremors and progressive rigidity of limbs) is caused by degeneration of brain neurons that are involved in movement control and make use of neurotransmitter
In heart cells, which one serves as a second messenger, speeding up muscle cell contraction in response to adrenaline?
Which one of the following is a matching pair of an animal and certain phenomenon it exhibits
Read the following statements and mark the right option
A. A healthy person has 12 to 16 g. of hemoglobin per 100 ml of blood
B. The number of platelets in a normal individual is 1.5 lac to 3.5 lac per mm3 of blood
C. Eosinophils are involved in allergic reactions
The prerequisite for biotechnological production of antibiotic is
Which of the following represents a condition where the mobility of the sperms is highly reduced?
The first case of IVF-ET technique success, was reported by :
Sickle cell anemia has not been eliminated from the African population because
Match the following bacteria with the diseases
Bateson used the terms coupling and repulsion for linkage and crossing over. Name the correct parental or coupling type along with its cross over or repulsion:
A particular enzyme molecule interacts with a specific substrate molecule is explained by
In all connective tissues except the following, the cells secretes the fibers of collagen or elastin protein
A functional ADA can be introduced into cells of the patients receiving gene therapy by using vector constituted by
Mark the correct sequence of the parts labeled A, B, C and D
Match the following sexually transmitted diseases (Column-I) with their causative agents (Column-II) and select the correct option?
What will happen if the secretion of parietal cells of gastric glands is blocked with an inhibitor?
Match the disorders given in column I with symptoms under column II. Choose the answer which gives the correct combination of alphabets with numbers.
Mark incorrect statement regarding normal ECG
Refer the following diagram and identify the parts of a kidney indicated
The striated muscle fibres are united in parallel bundles, the fasciculi. Each fasciculus is in turn surrounded by a connective tissue sheath known as
Thermoregulatory center in the body of homeothermic animals and man is found in
Match the source gland with its respective hormone as well as the function
Buchner discovered a complex enzyme system from yeast cells. His enzyme was :
Which set has the two members of the same phylum ?
Match the items in column A with column B and choose the correct answers given below.