There are four data given A = 5.00 m, B = 5.00 cm, C = 50.00 m and D = 5.00 mm. Select the most precise and most accurate data
A projectile is projected at an angle θ(> 45°) with initial speed u. The time t at which magnitude of vertical component of its velocity is equal to magnitude of horizontal component of its velocity, is
A particle is moving along x-axis such that its velocity varies with time t as v = 20 .At t = 0 particle is at origin. Select correct position (x) – time (t) plot for the particle
A quantity P is calculated by P = ,which quantity should be measured with best care to minimize error in P?
Velocity of the body of mass 10 kg changed from 2 m/s along east to 3 m/s along west in 5s.Average force acting on the body is
Variation of force F acting on a body with time t is as shown in figure. Change in momentum of the body in the interval 0 to 20 s is
Potential energy of a particle at position x is given by u = (- x2 + 2x) J. Force on the particle at x = 1 m is
A body of mass m moving with speed v compresses a spring of force constant k as shown in figure. Maximum compression of the spring is equal to
From a disc of radius R, a disc of radius is taken out as shown in figure. Position of the centre of mass of remaining disc is on
A uniform rod of length L is kept vertical as shown in figure. If there is non slipping at A and the rod is allowed to fall, then end B will hit the ground with speed
The pulley has moment of inertia l and radius is r. If there is no slipping of string over the pulley, then acceleration of the block of mass m is
A cube of side L and mass M is placed on rough horizontal surface and the friction is sufficient so that it will not move, if a constant force F = Mg is applied horizontally at a distance L / 4 above the surface. Then the torque due to normal force about centre of the cube is equal to
If a new planet is discovered rotating around the Sun with the orbital radius double that of earth, then what will be its time period (in earth’s days)?
If percentage error in the measurement of length and time period of a simple pendulum are 2% and 3% respectively, then the maximum error in the measurement of acceleration due to gravity is
Which one of the following figures correctly represents the flow of fluid through a tube with constructions as shown in the diagram
A uniform plank of Young’s modulus Y is moved over a smooth horizontal surface by a constant horizontal force F0.The area of cross-section of the plank is A. The strain on the plank in the direction of the force is
The work done to get 64 identical spherical water droplets to form a bigger spherical drop of water of radius R is W. The surface tension of water is
Rain drops fall from a height under gravity; we observe that :
The load versus elongation graphs for four wires A, B, C and D of the same material of same length are shown in the figure. The thinnest wire is represented by the line:
The excess pressure inside one soap bubble is three times that inside a second soap bubble, then the ratio of their surface area is
The differential equation of SHM for a particle is given by = 0.The ratio of the maximum acceleration to the maximum velocity of the particle is
A particle is performing SHM. If its kinetic energy is K, potential energy is U and its displacement from mean position is x then which of the following graph is correct if equation of SHM is x = A sin ωt.
An organ pipe P1 closed at one end vibrating in its first harmonic and another pipe P2 open at both ends vibrating in its third harmonic are in resonance with a given tuning fork. The ratio of the length of P1 to that of P2 is
A transverse wave traveling along negative y-axis its snap shot is given at any instant of time t.Points which is having velocity in negative x-direction
A cylindrical metal rod of length L0 is shaped into a ring with a small gap as shown in figure.On heating the system.
An ideal monatomic gas is taken round the cycle ABCDA as shown in the P–V diagram (see Fig.). The work done during the cycle is
If , and are the unit vectors along the incident ray, reflected ray and the outward normal to the reflector. Then
A point object is placed at a distance of 1000 mm from a concave mirror of focal length 400 mm. If the object is moved towards the mirror by 200 mm, the image moves by a distance of
Point charge +4q, -q and +4q are kept on the x-axis at points x = 0, x = a and x = 2a respectively. Then:
In a regular polygon of n sides, each corner is at a distance r from the centre. Identical charges of magnitude q are placed at (n – 1) corners. The field at the centre is
The net resistance between point P and Q in the circuit shown in the figure is
Current in the wire varies according to equation I =15sin 50πt where I is in ampere, t is in second and (50 πt) is in radian. How much net charge has passed a cross-section of the wire in the interval t = 0 to t = 40 ms :
Six long straight wires are located at the corners of a regular hexagon ABCDEF. All wires carry equal currents. Current in the all wires is into the plane of paper. The magnetic field at the centre O is along
The magnetic field lines in a long solenoid are as shown. If the solenoid is cut into two parts, the figure that best represents the field
A square loop of side 4 cm is lying on a horizontal table. A uniform magnetic field of 0.5 T is directed downwards at an angle of 60° to the vertical as shown in figure. If the field increases from zero to its final value in 0.2 s, the emf induced in the loop will be
Induced electric field due to varying magnetic field forms closed loops
The magnetic field energy in an inductor changes from minimum to maximum value in 2.5 ×10-3 s when connected to an AC source. The frequency of the source is:
In the figure, which of the phasor diagram represents RLC circuit driven at resonance?
At t = 0, light of intensity 1012 photons/s–m2 of energy 6eV per photon start falling on a plate with work function 2.5 eV. If area of the plate is 2 × 10-4 m2 and for every 105 photons one photoelectron is emitted, charge on the plate at t = 25 s is
The figure shows the variation of photo current with anode potential for a photo-sensitive surface for three different radiations. Let Ia,Ib and Ic be the intensities and fa, fb and fc be the frequencies for the curves a, b and c respectively
Answer :- A
Solution :- Stopping potential of a&b same so frequency f(a) = f(b)
Saturated photoelectric current of b&c same so intensity I(b) = I(c) > I(a)
The horizontal range of a projectile is R and the maximum height attained by it is H. A strong wind now begins to blow in the direction of the motion of the projectile, giving it a constant horizontal acceleration = g/2. Under the same conditions of projection, the horizontal range of the projectile will now be
A small object O is placed in front of a convex mirror, forming a virtual image, I. A narrow beam of light of light is now made incident on the mirror, aimed at I. After reflection at the mirror, the beam will reach O
A particle of mass m and charge Q is placed in an electric field E which varies with time t as E = E0sin t.It will undergo simple harmonic motion of amplitude
When beats are formed between sound waves of slightly different frequencies, the intensity of the sound heard changes from maximum to minimum in 0.2 s. The difference in frequencies of the two sound waves is
The duration of one beat is from one maximum to the next maximum of intensity. In this case, it is 0.4 s.
∴ the number of beats per second = 2.5 = the difference in frequencies.
An infinitely long thin conductor, shaped as shown, carries current. Each section is of the same length.The magnetic field at the point P due to the section from to A is B. The field at P due to the entire conductor is
Which fact is correct for gases?
Which fact is correct for joul Thomson effect T1 and T2 and are temperature of gas before and after expansion?
If a gas cools in a JT expansion, T2 < T1 and the JT coefficient is positive (since P2 < P1). Alternatively, if the gas warms, µJT is negative.
Which fact is wrong out of following?
Out of following which is spinel structure?
A polypeptide containing disulfide bonds is likely to be rich in which of the following amino acids?
Which one will be cyclic structure?
Which statement is wrong?
Which statement is correct
Heat of hydrogenation of cyclohexen is 119.5 Kcal. Heat of hydrogenation of benzene is 248 Kcal. Resonance energy will be
Which cell is possible?
Which equation is correct for given acid solution?
EH2 = EH2° - 0.0591×log[H+]/n
At pressure = 1 atm and at1M concentration, EH2° = 0
EH2 = 0-0.0591×log[H+]/1
But pH = -log[H+]
So, EH2 = 0.0591pH
Units of 2nd order will be
Which oxidizing agent will have equivalent weight as ?
Factors affecting adsorption will be
If S is solubility product of Ag2CrO4 , solubility of Ag2CrO4 in 10-2 K2CrO4 will be
PCl5 PCl3 + Cl2 ,Kc = 10-8 Degree of dissociation will be
C will be
1 butyne is converted to 2 butyne by using
Mustard gas obtained by
Which one explodes on heating in dry state?
Which one will shows Beackman’s rearrangement?
. B will be
Expected shape of Br3- is
Anhydride is obtained when
Out of following which reacts with KCN?
In contact process, SO2 is converted to SO3
2SO2 + O2 → 2SO3. The best condition for the maximum yield are
For the electronic configuration [Ne] ns2np2 how many empty orbitals are there if n = 3?
Which of the following molecular orbital has tow nodal planes?
At constant temperature for a heterogeneous equilibrium the value of Kp will be
3Fe(s) + 4H2O(g) Fe3O4(s) + 4H2(g)
When 1 mole of NO-3 is converted into 1 mole NO2 , 0.5 mole N2 and 0.5 mole N2O respectively, it accepts X, Y and Z moles of electrons, X, Y and Z are respectively
The amino acid glycine exists prediominantly in the form its conjugate base and conjugate acid will be respectively
A group of acidic oxide is
A mixture of H2 and O2 in the 2 : 1 volume ratio is allowed to diffuse through a porous plug.The composition of gas mixture coming out initially is
Polyethylene can be produced from calcium carbide according to the following sequence of reaction s
CaC2 + H2O → CaO + HC ≡ CH
nHC ≡ CH + nH2 → (CH2 - CH2 )n
The mass of polythlene which can be produced from 20 kg of CaC2 is
In the following compounds, the order of acidity is
Production of chloroform form CCl4 needs
If there are 17 carbon atoms present in the carbon chain attached to COONa group. The soap is called
Enzymes are basically
B will be
200 ml of 0.01 M KMnO4 oxidise 20 ml of H2O2 sample in acidic medium. The volume strength of H2O2 is
The electron of H-atom transits from n = 1 to n = 4 by absorbing energy. If the energy of n = 1 state is – 21.8 × 10-19 Joule then its energy in n = 4 state will be :
The first ionisation potential of Na, Mg, Al and Si are in the order
The order in which the following oxides are arranged according to decreasing basic nature is:
Molecular shapes of SF4, CF4 and XeF4 are
How many plants in the list given below have marginal placentatios Mustard,Gram, Tulip, As paragus, Arhar, Sunhemp, Chilli, Colchicine, Onion, Moong, pea, tobacco, lupin :
Which one of the following organisms is correctly matched with its three characteristics?
The correct floral formula of chilli is :
Chilli belongs to Solanaceae.
Flowers are zygomorphic in ?
A drupe develops in ?
Which one of the following statements is correct :
Ground tissue includes :
In land plants, the guard cells differ from other epidermal cells in having :
The cork cambium, cork and secondary cortex are collectively called :
Which one of the following is essential for photolysis of water ?
Guttation is the result of :
Which one of the following is not an essential mineral element for plants while the remaining three are?
What is common b/w vegetative reproduction and apomixes :
In angiosperms, functional megaspore develops into :
In Mitochondria, protons accumulate in the :
Function of companion cells is?
Which one of the following is correctly matched ?
A process that makes important difference b/w C3 and C4 plants is :
Best defined function of manganese in green plant is :
The correct sequence of cell organelles during photorespiration is :
When domestic sewage mixes with river water ?
Which one of the following is most appropriately defined ?
The Indian Rhinoceros is a natural inhabitat of which one of the Indian states ?
The logistic population growth is expressed by the equation ?
“Good Ozone” is found in the :
Biodiversity of a geographical region represents :
Consider the following statements : (A)- (D) each with one or two blanks
(A) Bears go into (1) during winter to (2) cold weather
(B) A conical age pyramid with a broad base represents (3) human population
(C) A wasp pollinating a fig flower is an example of (4)
(D) An area with high levels of species richness is knows as (5)
which one of the following options, gives the correct fill ups for the respective blank numbers from (1) to (5) in the statements ?
The answer of this question will be Option D because fishes go into aestivation during summer and in a stable population, age pyramid is not conical. It is at first, flat and then becomes conical.
The breakdown of detritus into smaller particles by earthworm is a process called :
Both, hydarch and Xerarch successions lead to :
Which one of the following animals may occupy more than one trophic levels in the same ecosystem at the same time ?
Consider the following four statements whether they are correct or wrong.
(A) The sporophyte in liverworts is more elaborate than that in mosses
(B) Salvia is heterosporous
(C) The life cycle in all seed bearing plants is diplontic
(D) In pinus male and female cones are borne on different trees.
The two wrong statements together are :
Selaginella and salvia are considered to represent a significant step towards evolution of seed habit because :
You have a potato, carrot, radish, sweet potato, tomato, peas and ginger bought from the market in your jute bag. Identify two vegetables to represent the correct homologous structures.
Whorled, simple leaves with reticulate venation are present in :
Some vascular bundles are described as open because these :
In Kranz anatomy, the bundle sheath cells have :
Virus envelops is known as :
Infectious proteins are present in :
Which one of the following cannot be explained on the basis of Mendel’s law of dominance ?
According to the law of dominance, a heterozygous individual carries two contrasting alleles/ factors of a gene. Here only one allele can express itself in the individual. It is called as dominant allele. The allele which does not show itself in a heterozygous individual is known as recessive allele. Each character in an organism is controlled by a gene which has two alleles. Hence this law suggest that each character of an organism is represented by atleast two factors and that one allele (dominant allele) shows its effect in both homozygous and heterozygous condition while the other one (recessive) shows itself in homozygous condition only. Options B, C and D can be explained by this law. The law of segregation states that two alleles for one gene do not blend with each other.
So, the correct answer is option D 'Alleles do not show any blending and both the characters recover as such in F2 generation'.
The genotype of a plant showing the dominant phenotype can be determined by :
The one aspect which is not a salient feature of genetic code, is its being :
Satellite DNA is useful in :
Which one of the following does not follow the central dogma of molecular biology ?
Select the two correct statements out of the four given below about lac operon
(I) Glucose and galactose may bind with the repressor and inactivate it
(II) In the absence of lactose the repressor binds with the operator region
(III)The Z-gene codes for permease
(IV) This was elucidated by Francars Jacob and Jacque Monod.
The correct statements are :
Which one of the following symbols and its representation used in human pedigree analysis is correct ?
Read the following features :-
(i) Nerve chord is Dorsal, hollow & single.
(ii) Gill clefts are found in pharynx
(iii) Notochord absent
(iv) Ventral heart
Out of these which are the features shown by a typical chordate animal ?
In addition to malpighian tubules which other structures also help in excretion in cockroach?
Which one of the following statements about human sperm is correct?
Which of the following statements are true/false?
(A)Calcitonin regulates the homeostasis of calcium alongwith PTH
(B)Oxytocin stimulates contraction of uterine muscles during birth
(C) "Grave's disease" is caused by malfunctioning of adrenal gland
(D)ADH stimulates absorption of water and increase the urine production.
It is a diagramatic presentaion of the human foetus within the uterus,choose the correct option about A, B and C
Read the following statements.
(a) Tissue matching and blood matching is essential before transplantation.
(b) Symptoms of allergy are rapidly decreased with the use of antihistamine, adrenaline and steroids.
(c) Pneumonia and common cold are spread to a healthy person through droplets of an infected person by cough and sneezing.
(d) Tumor cells don't show contact inhibition.
How many of above sentences are true
The given below diagram is of female reproductive system. Identify the structures which are marked as A,B, C and D :-
Cartilagenous joint is found in :-
Given below is a diagram showing parts of an eye. Which of the following option is correctly matched with statements and their labelling?
(i) Visible coloured portion of the eye
(ii) Non vascular, transparent portion
(iii)Photoreceptor cells are absent in this region
(iv)Portion of retina where only the cones are densely packed
Consider the following statements regarding the above diagrammatic representation :-
(A)Miller experiment at laboratory scale
(B) Proved theory of Oparin and Haldane that life orginated from non-living organic molecules like R.N.A. and Proteins
(C) Formation of amino-acids was observed
(D) Experiment demostrated that life comes only from pre existing life.Which of the above statements are correct :-
In the given figure, what is indicated by 'X' ?
Select the option with the correct identification of animals (A-D) in the above family tree of dinosaurs.
Read the following four statements (A – D) :-
(A) Tricuspid valve is present in between right auricle and right ventricle
(B) Bicuspid valve is present in between right auricle and right ventricle
(C) Semilunar valves are present at the opening of pulmonary arch and carotid systemic arch.
(D) All these valves are always be bidirectional. Out of these how many statements are incorrect?
Observe the diagrams given below of pBR322 plasmid :
Presence of which of the following vector in the host will help in screening of transformants that can grow on ampicillin containing medium but not on that containing tetracycline ?
Match the following :-
(A) Jaundice (i) Difficulty in breathing
(B) Pernicious (ii) Decreased anemia absorption
(C) Diarrhoea (iii) Bile pigment
(D) Asthma (iv) Vit B12
Identify A, B and C in given pathway of sperms in mammals :-
The zygote or early embryos (with up to 8 blastomeres) could be transferred into the fallopian tube, it is called –
A diagrammatic presentation of a reflex action is given below :-
(a) Occurs involuntarily and without conscious efforts
(b) At least one afferent and one efferent neuron required
(c) Interneuron is involved in the action
(d) Monosynaptic and unconditioned reflex
(e) Knee - Jerk reflex is regulated by spinal cord
Which of the above statements are correct for the above reflex action ?
VNTR belongs to a class of satellite DNA referred to as minisatellites. They are/have :-
Which points are correct about given animal ?
(A) Diploblastic, Radial symmetry
(B) Sexes are separate
(C) Exclusively marine
(D) Digestion is both extracellular and intracellular
Which of the following set has same number of chromosome
Total volume of air a person can inspire after a normal expiration is :-
Recombinant colonies do not produce any colour in the presence of chromogenic substrate due to:-
Which one of the following is an example of biological control of pest using microbes ?
Read the following term's explanations and find out correct match :-
Which of the following statement is correct about excretion ?
How many of the following animals are vertebrates ?
Flying Fish, Star Fish, Silver Fish, Dog Fish, Cat Fish, Jelly Fish
Which one of the following groups of animals reproduces only by sexual means?
The initial step in the digestion of milk in humans is carried out by:
The serous membrane which covers the lungs is called :
Which blood cells can engulf bacteria by phagocytosis?
The following is/are removed during hemodialysis:
What type of cartilaginous tissue is found in the intervertebral discs?
Which exitatory neutrotransmitter is involved in the transmission of impulse at the neuromuscular junction?
Which of the following hormones is a derivative of fatty acid?
The structure of E. coli chromosomal DNA is–