The reaction of C6H5CH = CHCH3 with HBr
produces:-

 In Duma's method for estimation of nitrogen, 0.25
g of an organic compound gave 40 mL of nitrogen
collected at 300 K temperature and 725 mm pressure.
If the aqueous tension at 300 K is 25 mm, the
percentage of nitrogen in the compound is :-

The Ksp of Ag₂CrO₄, AgCl, AgBr and AgI are
respectively, 1.1 × 10^–12, 1.8 × 10^–10, 5.0 × 10^–13,
8.3 × 10^–17. Which one of the following salts will
precipitate last if AgNO3 solution is added to the
solution containing equal moles of NaCl, NaBr, NaI
and Na₂CrO₄ ?

Bithional is generally added to the soaps as an
additive to function as a/an :-

"Metals are usually not found as nitrates in their
ores".
Out of the following two (a and b) reasons which
is/are true for the above observation ?
(a) Metal nitrates are highly unstable.
(b) Metal nitrates are highly soluble in water.

The correct bond order in the following species is:-

The species Ar, K+ and Ca²⁺ contain the same
number of electrons. In which order do their radii
increase ?

The activation energy of a reaction can be
determined from the slope of which of the following
graphs ?

Which of the following pairs of ions are isoelectronic
and isostructural ?

An organic compound 'X' having molecular formula
C₅H_10O yields phenyl hydrazone and gives negative
response to the Iodoform test and Tollen's test. It
produces n-pentane on reduction. 'X' could be :-

Which of the following options represents the correct
bond order ?

The electrolytic reduction of nitrobenzene in strongly
acidic medium produces :-

Magnetic moment 2.84 B.M. is given by :-

(At. nos, Ni = 28, Ti = 22, Cr = 24, Co = 27)

A given metal crystallizes out with a cubic structure
having edge length of 361 pm. If there are four
metal atoms in one unit cell, what is the radius of
one atom?

Which one of the following electrolytes has the same
value of van't Hoff's factor (i) as that of the Al₂(SO₄)₃

(If all are 100% ionised)

Nitrogen dioxide and sulphur dioxide have some
properties in common. Which property is shown by
one of these compounds, but not by the other ?

The total number of p-bond electrons in the following
structure is :-

Solubility of the alkaline earth's metal sulphates in
water decreases in the sequence :-

Maximum bond angle at nitrogen is present in which
of the following ?

If the value of an equilibrium constant for a particular reaction is 1.6 × 10¹², then at equilibrium the system will contain :-

The number of d-electrons in Fe²+ (Z = 26) is not
equal to the number of electrons in which one of
the following?

In which of the following compounds, then C - Cl
bond ionisation shall give most stable carbonium ion?

A device that converts energy of combustion of fuels
like hydrogen and methane, directly into electrical
energy is known as :-

Consider the following compounds

The reaction

Cobalt (III) chloride forms several octahedral
complexes with ammonia. Which of the following
will not give test of chloride ions with silver nitrate
at 25ºC ?

A mixture of gases contains H₂ and O₂ gases in the
ratio of 1 : 4 (w/w). What is the molar ratio of the
two gases in the mixture ?

Which of the following processes does not involve
oxidation of iron ?

Because of lanthanoid contraction, which of the
following pairs of elements have nearly same atomic
radii ? (Nubmers in the parenthesis are atomic
numbers).

Which of the following statements is correct for a
reversible process in a state of equilibrium ?

The angular momentum of electron in 'd' orbital is
equal to :-

The boiling point of 0.2 mol kg^–1 solution of X in
water is greater than equimolal solution of Y in water.
Which one of the following statements is true in this
case ?

The function of "Sodium pump" is a biological process operating in each and every cell of all animals. Which of the following biologically important ions is also a consituent of this pump : -

Given :-

The enthalpy of the hydrogenation of these
compounds will be in the order as :-

The enolic form of ethyl acetoacetate as below has:-

Biodegradable polymer which can be produced from
glycine and aminocaproic acid is :-

Which of the following species contains equal
number of σ- and Π- bonds :-

Which of these statements about [Co(CN)₆]^3– is true:-

Which one is not equal to zero for an ideal solution:-

Which property of colloidal solution is independent of charge on the colloidal particles :-

Given:-

Which of the given compounds can exhibit
tautomerism?

When initial concentration of a reactant is doubled
in a reaction, its half-life period is not affected. The
order of the reaction is :-

A single compound of the structure :-

is obtainable from ozonolysis of which of the following
cyclic compounds ?

Which of the following endoparasites of humans
does show viviparity ?

Cryopreservation of gametes of threatened species
in viable and fertile condition can be referred to as:-

Which one one of the following matches is correct ?

Minerals known to be required in large amounts for
plant growth include :-

Which of the following enhances or induces fusion
of protoplasts ?

Which of these is not an important component of
initiation of parturition in humans ?

In which of the following gametophyte is not
independent free living ?

Which of the following is not a sexually transmitted
disease ?

Leaves become modified into spines in :-

Which one gives the most valid and recent
explanation for stomatal movements ?

Which of the following had the smallest brain
capacity ?

High value of BOD (Biochemical Oxygen Demand)
indicates that :-

Sliding filament theory can be best explained as :-

A gymnast is able to balance his body upside down
even in the total darkness because of :-

A man with blood group 'A' marries a woman with
blood group 'B'. What are all the possible blood
groups of their offsprings ?

Typical growth curve in plants is :-

The UN Conference of Parties on climate change in the year 2011 was held in :-

A technique of micropropagation is :-

How many pairs of contrasting characters in pea plants were studied by Mendel in his experiments

The crops engineered for glyphosate are resistant/
tolerant to :-

Which of the following statements is not correct?

In sea urchin DNA, which is double stranded, 17%
of the bases were shown to be cytosine. The
percentages of the other three bases expected to
be present in this DNA are :-

In Bt cotton, the Bt toxin present in plant tissue as
pro-toxin is converted into active toxin due to :-

Cytochromes are found in :-

Read the following five statements (A to E) and select
the option with all correct statements :-

(A) Mosses and Lichens are the first organisms to
colonise a bare rock.
(B) Selaginella is a homosporous pteridophyte
(C) Coralloid roots in Cycas have VAM
(D) Main plant body in bryophytes is gametophytic,
whereas in pteridophytes it is sporophytic
(E) In gymnosperms, male and female gametophytes
are present within sporangia located on
sporophyte

Which one of the following is correct ?

The movement of a gene from one linkage group
to another is called :-

Which body of the Government of India regulates
GM research and safety of introducing GM
organisms for public services ?

Rachel Carson's famous book "Silent Spring" is
related to :-

Gastric juice of infants contains :-

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

Capacitation refers to changes in the :-

Most animals are tree dwellers in a:-

True nucleus is absent in :-

Glenoid cavity articulates :-

Transmission tissue is characteristic feature of :-

DNA is not present in :-

Gene regulation governing lactose operon of E.coli
that involves the lac I gene product is :

Which of the following does not favour the formation
of large quantities of dilute urine ?

What causes a green plant exposed to the light on
only one side, to bend toward the source of light as
it grows ?

Nuclear envelope is a derivative of :-

Select the correct option :-

Keel is the characteristic feature of flower of :-

Perigynous flowers are found in :-

A chemical signal that has both endocrine and neural roles is 

In which of the following both pairs have correct
combination :-

HIV that causes AIDS, first starts destroying:

Hysteresctomy is surgical removal of :

Removal of proximal convoluted tubule from the
nephron will result in:

A major characteristic of the monocot root is the
presence of :

Which of the following characteristics is mainly
responsible for diversification of insects on land ?

Which of the following cells during gametogenesis
is normally dipoid?

The structures that are formed by stacking of
organized flattened membranous sacs in the
chloroplasts are :

The chromosomes in which centromere is situated
close to one end are:

In a ring girdled plant:

Vertical distribution of different species occupying
different levels in a biotic community is known as:

Multiple alleles are present :

The mass of living material at a trophic level at a particular time is called :

Which of the following animals is not viviparous

In an ecosystem the rate of production of organic
matter during photosynthesis is termed as:

Erythropoiesis starts in :

Which is the most common mechanism of genetic
variation in the population of sexually reproducing
organism?

Blood pressure in the mammalian aorta is
maximum during :

When you hold your breath, which of the following
gas changes in blood would first lead to the urge to
breathe?

Vascular bundles in monocotyledons are considered
closed because:

Male gemetes are flagellated in :

Which one of the following may require pollinators,
but is genetically similar to autogamy ?

In ginger vegetative propagation occurs through:

Which one of the following is not an inclusion body
found in prokaryotes ?

A somatic cell that has just completed the S phase
of its cell cycle, as compared to gamete of the same
species, has :

Alleles are :

Select the correct matching in the following pairs :

The terga, sterna and pleura of cockroach body are
joined by :

Which of the following represents the correct
combination without any exception?

Which one of the following statements in incorrect?

Which of the following regions of the brain is
incorrectly paired with its function?

Which one of the following statements is not true?

The active from of Entamoeba histolytica feeds
upon:

Which of the following viruses is not transferred
through semen of an infected male?

A population will not exist in Hardy - Weinberg
equilibrium if :

The guts of cow and buffalo possess:

The hilum is a scar on the :

Secondary Succession takes place on/in:

Which one of the following statements is wrong?

The following graph depicts changes in two
populations (A and B) of herbivores in a grassy field
A possible reason for these changes is that:

Match each disease with its correct type of vaccine:
(a) tuberculosis            (i) harmless virus
(b) whooping cough     (ii) inactivated toxin
(c) diphtheria              (iii) killed bacteria
(d) polio                     (iv) harmless bacteria

Which of the following are the important floral
rewards to the animal pollinators?

An abnormal human baby with 'XXX' sex
chromosomes was born due to :

Transpiration and root pressure cause water to rise
in plants by :

An electron moving in a circular orbit of radius r
makes n rotations per second. The magnetic field
produced at the centre has magnitude :

One mole of an ideal diatomic gas undergoes a
transition from A to B along a path AB as shown
in the figure,

The change in internal energy of the gas during the transition is :

When two dispalcements represented by
y₁ = asin(ωt) and y2 = b cos(ωt) are superimposed
the motion is :

A Particle of unit mass undergoes one-dimensional
motion such that its velocity varies according to
v(x) = βx^–2n
where b and n are constants and x is the position
of the particle. The acceleraion of the particle as
a function of x, is given by :

In a double slit experiment, the two slits are 1 mm
apart and the screen is placed 1 m away. A
monochromatic light of wavelength 500 nm is used.
What will be the width of each slit for obtaining ten
maxima of double slit within the central maxima of
single slit pattern ?

For a parallel beam of monochromatic light of
wavelength 'λ', diffraction is produced by a single
slit whose width 'a' is of the order of the wavelength
of the light. If 'D' is the distance of the screen from
the slit, the width of the central maxima will be :

Across a metallic conductor of non-uniform cross
section a constant potential difference is applied.
The quantity which remains constant along the
conductor is :

On observing light from three different stars P, Q
and R, it was found that intensity of violet color is
maximum in the spectrum of P, the intensity of green
colour is maximum in the spectrum of R and the
intensity or red colour is maximum in the spectrum
of Q. If T_P, T_Q and T_R are the respective absolute
temperatures of P, Q and R, then it can be
concluded from the above observation that :

A potentiometer wire has length 4 m and resistance
8Ω. The resistance that must be connected in series
with the wire and an accumulator of e.m.f. 2V, so
as to get a potential gradient 1 mV per cm on the
wire is :

Consider 3rd orbit of He⁺ (Helium), using non-relativistic approach, the speed of electron in this orbit will be given K = 9×10  constant, Z=2 and h (Planck's Constant) = 6.6×10^-34 Js]

A wire carrying current I has the shape as shown
in adjoining figure. Linear parts of the wire are very
long and parallel to X-axis while semicircular portion
of radius R is lying in Y-Z plane. Magnetic field at
point O is :

Which of the following figures represent the
variation of particle momentum and the associated
de-Broglie wavelength ?

A parallel plate air capacitor of capacitance C is
connected to a cell of emf V and then disconnected
from it. A dielectric slab of dielectric constant K,
which can just fill the air gap of the capacitor, is now
inserted in it. Which of the following is incorrect

The fundamental frequency of a closed organ pipe
of length 20 cm is equal to the second overtone of
an organ pipe open at both the ends. The length
of organ pipe open at both the ends is :-

The refracting angle of a prism is A, and refractive
index of the material of the prism is cot(A/2). The
angle of minimum deviation is :-

Which logic gate is represented by the following
combination of logic gates ?

A Carnot engine, having an efficiency of n = 1/10 as
heat engine, is used as a refrigerator. If the work
done on the system is 10 J, the amount of energy
absorbed from the reservoir at lower temperature is 

A certain metallic surface is illuminated with
monochromatic light of wavelength, l. The stopping
potential for photo-electric current for this light is
3V₀. if the same surface is illuminated with light of
wavelength 2λ, the stopping potential is V0. The
threshold wavelength for this surface for photoelectric
effect is :-

A radiation of energy ‘E’ falls normally on a perfectly
reflecting surface. The momentum transferred to
the surface is (C = Velocity of light) :-

A mass m moves in a circle on a smooth horizontal
plane with velocity v0 at a radius R0. The mass is
attached to a string which passes through a smooth
hole in the plane as shown.

The tension in the string is increased gradually and
finally m moves in a circle of radius  R₀/2.The final
value of the kinetic energy is :-

Two identical thin plano-convex glass lenses
(refractive index 1.5) each having radius of
curvature of 20 cm are placed with their convex
surfaces in contact at the centre. The intervening
space is filled with oil of refractive index 1.7. The
focal length of the combination is :-

A block A of mass m1 rests on a horizontal table.
A light string connected to it passes over a
frictionless pulley at the edge of table and from its
other end another block B of mass m₂ is suspended.
The coefficient of kinetic friction between the block
and the table is µk. When the block A is sliding on
the table, the tension in the string is :-

A particle is executing SHM along a straight line.Its velocities at distances x1 and x2 from the meanposition are V1 and V2, respectively. Its time period is :-

Kepler's third law states that square of period ofrevolution (T) of a planet around the sun, is proportional to third power of average distance r between sun and planet
i.e. T2 = Kr³ here K is constant. If the masses of sun and planet are M and m respectively then as per Newton's law of gravitation force of attraction between them is
F = GMm/r², here G is gravitational constant. The relation between G and K is described as :

A block of mass 10 kg, moving in x direction with a constant speed of 10 ms^-1, is subjected to a retarding force F = 0.1×J/m during its travel from x = 20 m to 30 m. Its final KE will be :

A wind with speed 40 m/s blows parallel to the roof of a house. The area of the roof is 250 m².
Assuming that the pressure inside the house is atmospheric pressure, the force exerted by the windon the roof and the direction of the force will be :(P_air = 1.2 kg/m³)

Two spherical bodies of mass M and 5 M and radiiR and 2 R are released in free space with initialseparation between their centres equal to 12 R. If they attract each other due to gravitational forceonly, then the distance covered by the smaller body before collision is :

A resitance 'R' draws power 'P' when connected to an AC source. If an inductance is now placed in series with the resistance, such that the impedance of the circuit becomes 'Z', the power drawn will be :

The ratio of the specific heats C_p/C_v =λ in terms of degrees of freedom (n) is given by :

Figure below shows two paths that may be taken by a gas to go from a state A to a state C.

If energy (E), velocity (V) and time (T) are chosen as the fundamental quantities, the dimensional formula of surface tension will be :

If in a p-n junction, a square input signal of 10 V is applied as shown,

Three blocks A, B and C of masses 4 kg, 2 kg and 1 kg respectively, are in contact on a frictionless surface, as shown. If a force of 14 N is applied on
the 4 kg block, then the contact force between A and B is :

A, B and C are voltmeters of resistance R, 1.5 R and 3R respectively as shown in the figure. When some potential difference is applied between X and Y, the voltmeter readings are V_A, V_B and V respectively. Then :

Three identical spherical shells, each of mass m and radius r are placed as shown in figure. Consider an axis XX' which is touching to two shells and passing through diameter of third shell. Moment of inertia of the system consisting of these three spherical shells about XX' axis is :-

The electeric field in a certain region is acting radially outward and is given by E = Ar.A charge contained in a shepere of radius 'a' centred at the origin of the field, will be given by :

The two ends of a metal rod are matainted at temperatures 100°C and 110°C. The rate of heat flow in the rod is found to be 4.0 J/s. If the ends are maintained at temperatures 200°C and 210°C, the rate of heat flow will be :

Two similar springs P and Q have spring constants K_P and K_Q, such that K_P > K_Q. The are stretched, first by the same amount (case a,) then by the same force (case b). The work done by the springs W_P and W_Q are related as, in case (a) and case (b), respectively :

A conducting square frame of side 'a' and a long straight wire carrying current I are located in the same plane as shown in the figure. The frame moves to the right with a constant velocity 'V'. The emf induced in the frame will be proportional to :

A particle of mass m is driven by a machine that delivers a constant power k watts. If the particle starts from rest the force on the particle at time t is :

Which of the following is the most correct electron displacement for a nucleophilic reaction to take place?

A ship A is moving Westwards with a speed of 10 km h–1 and a ship B 100 km South of A, is moving Northwards with a speed of 10 km h–1. The time after which the distance between them becomes shortest, is :-

A rod of weight W is supported by two parallel knife edges A and B and is in equilibrium in a horizontal position. The knives are at a distance d from each other. The centre of mass of the rod is at distance x from A. The normal reaction on A is :-

The approximate depth of an ocean is 2700 m. The compressibility of water is 45.4 × 10^–11 Pa^–1 and density of water is 10³ kg/m3.What fractional compression of water will be obtained at the bottom of the ocean ?

Two particles of masses m₁, m₂ move with initial velociteis u₁ and u₂. On collision, one of the particles get excited to higher level, after abosrbing energy e. If final velocities of particles be v₁ and v₂ then we must have :