Which part of human brain is concerned with the regulation of body temperature?

One of the synthetic auxin is

Which one of the following acids is a derivative of carotenoids?

The haemoglobin of a human foetus

What is vital capacity of our lungs?

In a standard ECG which one of the following alphabets is the correct representation of the respective activity of the human heart?

Globulins contained in human blood plasma are primarily involved in

There is no DNA in

Compared to blood our lymph has

Aerobic respiratory pathway is appropriately termed

Which one of the following is the correct matching of three items and their grouping category?

What will happen if the stretch receptors of the urinary bladder wall are totally removed?

Uric acid is the chief nitrogenous component of the excretory products of

Alzheimer's disease in humans is associated with the deficiency of

Elbow joint is an example of

A health disorder that results from the deficiency of thyroxine in adults and characterised by (i) a low metabolic rate, (ii) increase in body weight and (iii) tendency to retain water in tissues is

Vegetative propagation in mint occurs by

The correct sequence of spermatogenetic stages leading to the formation of sperms in a mature human testis is :

Which one of the following is the most likely root cause why menstruation is not taking place in regularly cycling human female ?

Which one of the following is the correct matching of the events occurring during menstrual cycle ?

A change in the amount of yolk and its distribution in the egg will effect :

Which one of the following pairs of animals comprises 'jawless fishes'?

Which one is the wrong pairing for the disease and its causal organism?

T.O. Diener discovered a

Which one of the following is a vascular cryptogam?

Which of the following is a symbiotic nitrogen fixer?

Which one of the following is considered important in the development of seed habit?

Phylogenetic system of classification is based on

Oxygenic photosynthesis occurs in

If a live earthworm is pricked with a needle on its outer surface without damaging its gut, the fluid that comes out is

Mannitol is the stored food in

Which one of the following has haplontic life cycle?

Which one of the following plants is monoecious?

Which one of the following groups of animals is bilaterally symmetrical and triploblastic?

Given below is a diagrammatic sketch for a portion of human male reproductive system. Select the correct set of the names of the parts labelled A, B, C, D.

An examples of a seed with endosperm, perisperm, and caruncle is

Cotyledons and testa respectively are edible parts in

A fruit developed from hypanthodium inflorescence is called

An example of axile placentation is

The floral formula

is that of

Cyclic photophosphorylation results in the formation of

Synapsis occurs between

Given below is a schematic break-up of the phases/stages of cell cycle. Which one of the following is the correct indication of the stage/phase in the cell cycle?

Stroma in the chloroplasts of higher plant contains

Palisade parenchyma is absent in leaves of -

Reduction in vascular tissue, mechanical tissue and cuticle is characteristic of :

Which one of the following types organisms occupy more than one trophic level in a pond ecosystem ?

A country with a high rate of population growth took measures to reduce it. The figure below shows age-sex pyramids of populations A and B twenty years apart. Select the correct interpretation about them : –

Which one of the following has maximum genetic diversity in India ?

The correct sequence of plants in hydrosere is :

Tiger is not a resident in which one of the following National Park ?

In barley stem vascular bundles are -

What is true about Bt toxin ?

The annular and spirally thickened conducting elements generally develop in the protoxylem when the root or stem is -

Anatomically fairly old dicotyledonous root is distinguished from the dicotyledonous stem by :

Middle lamella is composed mainly of :

Cytoskeleton is made up of :

The kind of tissue that forms the supportive structure in our pinna (external ears) is also found in -

The epithelial tissue present on the inner surface of bronchioles and fallopian tubes is :

Plasmodesmata are :

Which one of the following correctly described the location of some body parts in the earthworm Pheretima ?

Which one of the following is correct pairing of a body part and like kind of muscle tissue that moves it ?

The cell junctions called tight, adhering and gap junctions are found in :

Peripatus is a connecting link between :

Seminal plasma in humans is rich in :

Foetal ejection reflex in human female is induced by

Removal of introns and joining the exons in a defined order in a transcription unit is called :

What is not true for genetic code?

Study the pedigree chart given below : What does it show ?

Sickle-cell anemia is :

Semi-conservative replication of DNA was first demonstrated in :

Whose experiments cracked the DNA and discovered unequivocally that a genetic code is a "triplet" ?

The genetic defect-adenosine deaminase (ADA) deficiency may be cured permanently by

Select the incorrect statement from the following :

The most popularly known blood grouping is the ABO grouping. It is named ABO and not ABC, because "O" in it refers to having :

In the case of peppered moth (Biston betularia) the black-coloured from became dominant over the light-coloured form in England during industrial revolution. This is an example of -

Which one of the following statement is correct ?

Which of following is a pair of viral diseases ?

Which one of the following pairs is wrongly matched ?

Which of the following is not used as a biopesticide ?

Somaclones are obtained by : -

Polyethylene glycol method is used for :

The bacterium Bacillus thuringiensis is widely used in contemporary biology as -

What is antisense technology?

Which one of the following is commonly used in transfer of foreign DNA into crop plants ?

Transgenic plants are the ones -

Out of TiF₆^2$$-$$, CoF₆^3$$-$$, Cu₂Cl₂ and NiCl₄^2$$-$$ (Z of Ti = 22, Co = 27, Cu = 29, Ni = 28) the colourless species are

Which of the following is not permissible arrangement of electrons in an atom ?

For the reaction, N₂ + 3H₂ $$ \to $$ 2NH₃, if
$${{d\left[ {N{H_3}} \right]} \over {dt}}$$ = 2 $$ \times $$ 10^$$-$$4 mol L^$$-$$1 s^$$-$$1,
the value of $${{ - d\left[ {{H_2}} \right]} \over {dt}}$$ would be

Propionic acid with Br₂/P yields a dibromo product. Its structure would be

Which of the following hormones contains iodine?

Predict the product.

Nitrobenzene can be prepared from benzene by using a mixture of conc. HNO₃ and conc. H₂SO₄. In the mixture, nitric acid acts as a/an

The segment of DNA which acts as the instrumental manual for the synthesis of the protein is

A 0.0020 m aqueous solution of an ionic compound [Co(NH₃)₅(NO₂)]Cl freezes at $$-$$ 0.00732^oC. Number of moles of ions which 1 mol of ionic compound produces on being dissolved in water will be (K_f = $$-$$1.86^oC/m)

Given :
(i)   Cu²⁺ + 2e^$$-$$ $$ \to $$ Cu,  E^o = 0.337 V
(ii)  Cu²⁺ + e^$$-$$ $$ \to $$ Cu⁺,  E^o = 0.153 V
Electrode potential, E^o for the reaction,
Cu⁺ + e^$$-$$ $$ \to $$ Cu,  will be

The equivalent conductance of M/32 solution of a weak monobasic acid is 8.0 mho cm² and at infinite dilution is 400 mho cm². The dissociation constant of this acid is

Half-life period of a first order reaction is 1386 seconds. The specific rate constant of the reaction is

In the reaction,
BrO$$_{3(aq)}^ - $$ + 5Br$$_{(aq)}^ - $$ + 6H⁺ $$ \to $$ 3Br_2(l) + 3H₂O_(l).
The rate of appearance of bromine (Br₂) is related to rate of disappearance of bromide ions as

For the reaction A + B $$ \to $$ products, it is observed that

(i)  on doubling the initial concentration of A only, the rate of reaction is also doubled and
(ii)  on doubling the initial concentration of both A and B, there is a change by a factor of 8 in the rate of the reaction.

The rate of this reaction is given by

Al₂O₃ is reduced by electrolysis at low potentials and high currents. If 4.0 $$ \times $$ 10⁴ amperes of current is passed through molten Al₂O₃ for 6 hours, what mass of aluminium is product? (Assume 100% current efficiency, at mass of Al = 27 g mol^$$-$$1).

Among the following which is the strongest oxidising agent?

The straight chain polymer is formed by

The stability of +1 oxidation state among Al, Ga, In and Tl increases in the sequence

Which one of the elements with the following outer orbital configurations may exhibit the largest number of oxidation states?

Which of the following does not show optical isomerism?

(en = ethylenediamine)

Which of the following complex ions is expected to absorb visible light?
(At. nos. Zn = 30, Sc = 21, Ti = 22, Cr = 24)

The dissociation constants for acetic acid and HCN at 25^oC are 1.5 $$ \times $$ 10^$$-$$5 and 4.5 $$ \times $$ 10^$$-$$10 respectively. The equilibrium constant for the equilibrium
CN^$$-$$ + CH₃COOH $$\rightleftharpoons$$ HCN + CH₃COO^$$-$$ would be

Maximum number of electrons in a subshell of an atom is determined by the following

10 g of hydrogen and 64 g of oxygen were filled in a steel vessel and exploded. Amount of water produced in this reaction will be

Amongst the elements with following electronic configurations, which one of them may have the highest ionisation energy ?

What is the dominant intermolecular force or bond that must be overcome in converting liquid CH₃OH to a gas?

In which of the following molecules/ions BF₃, NO$$_2^ - $$, NH$$_2^ - $$ and H₂O, the central atom is sp² hybridised?

According to MO theory which of the lists ranks the nitrogen species in terms of increasing bond order ?

The values of $$\Delta $$H and $$\Delta $$S for the reaction,

C_(graphite) + CO₂(g) $$ \to $$  2CO_(g)

are 170 kJ and 170 J K^$$-$$1, respectively. This reaction will be spontaneous at

From the following bond energies :
H $$-$$ H bond energy   : 431.37 kJ mol^$$-$$1
C $$=$$ C bond energy   : 606.10 kJ mol^$$-$$1
C $$-$$ C bond energy   : 336.49 kJ mol^$$-$$1
C $$-$$ H bond energy   : 410.50 kJ mol^$$-$$1
Enthalpy for the reaction,

will be

What is the [OH^$$-$$] in the final solution prepared by mixing 20.0 mL of 0.050 M HCl with 30.0 mL of 0.10 M Ba(OH)₂?

The ionization constant of ammonium hydroxide is 1.77 $$ \times $$ 10^$$-$$5 at 298 K. Hydrolysis constant of ammonium chloride is

Which of the following molecules acts as a Lewis acid?

The IUPAC name of the compound having the formula
CH$$ \equiv $$C$$-$$CH$$=$$CH₂ is

The state of hybridisation of C₂, C₃, C₅ and C₆ of the hydrocarbon,


is in the following sequence

Which of the following compounds will exhibit cis-trans (geometrical) isomerism?

Benzene reacts with CH₃Cl in the presence of anhydrons AlCl₃ to form

HOCH₂CH₂OH on heating with periodic acid gives

Consider the following reaction :


the product Z is

Which of the following reactions is an example of nucleophilic substitution reaction?

Consider the following reaction :


the product Z is

Oxidation numbers of P in PO$$_4^{3 - }$$, of S in SO$$_4^{2 - }$$ and that of Cr in Cr₂O$$_7^{2 - }$$ are respectively

Trichloroacetaldehyde, CCl₃CHO reacts with chlorobenzene in presence of sulphuric acid and produces

A conducting circular loop is placed in a uniform magnetic field 0.04 T with its plane perpendicular to the magnetic field. The radius of the loop starts shrinking at 2 mm/s. The induced emf in the loop when the radius is 2 cm is

If a diamagnetic substance is brought near the north or the south pole of a bar magnet, it is

Three capacitors each of capacitance C and of breakdown voltage V are joined in series. The capacitance and breakdown voltages of the combination will be

Under the influence of a uniform magnetic field, a charged particle moves with constant speed v in a circle of radius R. The time period of rotation of the particle

Three concentric spherical shells have radii a, b and c (a < b < c) anf have surface charge densities $$\sigma $$, $$-$$$$\sigma $$ and $$\sigma $$ respectively. If V_A, V_B and V_C denote the potentials of the three shells, then, for c = a + b, we have

The electric potential at a point (x, y, z) is given by V = $$-$$x²y $$-$$ xz³ + 4

The electric field at that point is

A galvanometer havings a coil resistance of 60 $$\Omega $$ shows full scale deflection when a current of 1.0 amp passes through it. It can be converted into an ammeter to read currents upto 5.0 amp by

A wire of resistance 12 ohms per meter is bent to form a complete circle of radius 10 cm. The resistance between its two diametrically opposite points, A and B as shown in the figure is

The magnetic force acting on a charged particle of charge $$-$$2 $$\mu $$C in a magnetic frield of 2 T acting in y direction, when the particle velocity is $$\left( {2\widehat i + 3\widehat j} \right) \times {10^6}\,m{s^{ - 1}}$$

A student measures the terminal potential difference (V) of a cell (of emf $$\varepsilon $$ and internal resistance r) as a function of the current (I) flowing through it. The slope, and intercept, of the graph between V and I, then respectively, equal

Power dissipated in an LCR series circuit connected to an A.C. source of emf $$\varepsilon $$ is

The electric field part of an electromagnetic wave in a medium is represented by E_x = 0;

$${E_y} = 2.5{N \over C}\cos \left[ {\left( {2\pi \times {{10}^6}{{rad} \over m}} \right)t - \left( {\pi \times {{10}^{ - 2}}{{rad} \over s}} \right)x} \right];$$

E_z = 0.

A rectangular, a square, a circular and an elliptical loop, all in the (x-y) plane, are moving out of a uniform magnetic field with a constant velocity. $$\overrightarrow V = v\widehat i$$. The magnetic field is directed along the negative z axis direction. The induced emf, during the passes of these loops, out of the field region, will not remain constant for

The mean free path of electrons in a metal is 4 $$ \times $$ 10^$$-$$8 m. The electric field which can give on an average 2 eV energy to an electron in the metal will be in units V/m

The figure shows a plot of photo current versus anode potential for a photo sensitive surface for three different radiations. Which one of the following is a correct statement?

Monochromatic light of wavelength 667 nm is produced by a helium neon laser. The power emitted is 9 mW. The number of photons arriving per sec. on the average at a target irradiated by this beam is

The number of photo electrons emitted for light of a frequency $$\upsilon $$ (higher than the threshold frequency $${\upsilon _0}$$) is proportional to

A p-n photodiode is fabricated from a semiconductor with a band gap of 2.5 eV. It can detect a signal of wavelength

In a Rutherford scattering experiment when a projectile of charge z₁ and mass M₁ approaches a target nucleus of charge z₂ and mass M₂, the distance of closest approach is r₀. The energy of the projectile is

Sodium has body centred packing. Distance between two nearest atoms is 3.7 $$\mathop A\limits^ \circ $$. The lattice parameter is

The symbolic representation of four logic gates are given below



The logic symbols for OR, NOT and NAND gates are respectively

The ionization energy of the electron in the hydrogen atom in its ground state is 13.6 eV. The atoms are excited to higher energy levels to emit radiations of 6 wavelengths, Maximum wavelength of emitted radiation corresponds to the transition between

The two ends of a rod of length L and a uniform cross-sectional area A are Kept at two temperatures T₁ and T₂ (T₁ > T₂). The rate of heat transfer, $${{dQ} \over {dt}}$$ through the rod in a steady state is given by :

A particle starts its motion from rest under the action of a constant force. If the distance covered in first 10 seconds is S₁ and that covered in the first 20 seconds is S₂, then

If the dimensions of a physical quantity are given by M^aL^bT^c, then the physical quantity will be

A body, under the action of a force $$\overrightarrow F = 6\widehat i - 8\widehat j + 10\widehat k,$$ acquires an accelerations of 1 m/s². The mass of this body must be

The mass of a lift is 2000 kg. When the tension in the supporting cable is 28000 N, then its acceleration is :

A thin circular ring of mass M and radius R is rotating in a horizontal plane about an axis vertical to its plane with a constant angular velocity $$\omega $$. If two objects each of mass m be attached gently to the opposite ends of a diameter of the ring, the ring will then rotate with an angular velocity

A block of mass M is attached to the lower end of a vertical spring. The spring is hung from a ceiling and has force constant value k. The mass is released from rest with the spring initially unstretched. The maximum extension produced in the length of the spring will be

An explosion blows a rock into three parts. Two parts go off at right angles to each other. These two are, 1 kg first part moving with a velocity of 12 m s^$$-$$1 and 2 kg second part moving with a velocity 8 m s^$$-$$1. If the third part flies off with a velocity of 4 m s^$$-$$1, its mass would be :

A body of mass 1 kg is thrown upwards with a velocity 20 m/s. It momentarily comes to rest after attaining a height of 18 m. How much energy is lost due to air friction? (g = 10 m/s²)

Two bodies of mass 1 kg and 3 kg have position vectors $$\widehat i + 2\widehat j + \widehat k$$ and $$ - 3\widehat i - 2\widehat j + \widehat k$$, respectively. The center of mass of this system has a position vector :

An engine pumps water continuously through a hose. Water leaves the hose with a velocity v and m is the mass per unit length of the water jet. What is the rate at which kinetic energy is imparted to water?

Four identical thin rods each of mass M and length $$l$$, form a square frame. Moment of inertia of this frame about an axis through the centre of the square and perpendicular to its plane is

If $$\overrightarrow F $$ is the force acting on a particle having position vector $$\overrightarrow r $$ and $$\overrightarrow \tau $$ be the torque of this force about the origin, then

A black body at 227^oC radiates heat at the rate of 7 cals/cm²s. At a temperature of 727^oC, the rate of heat radiated in the same units will be

The figure shows elliptical orbit of a planet m about the sun S. The shaded area SCD is twice the shaded area SAB. If t₁ is the time for the planet to move from C to D and t₂ is the time to move from A to B then

The internal energy change in a system that has absorbed 2 kcal of heat and done 500 J of work is

In thermodynamic processes which of the following statements is not true ?

Which one of the following equations of motion represents simple harmonic motion ?

where k, k₀, k₁ and a are all positive.

Each of the two strings of length 51.6 cm and 49.1 cm are tensioned separately by 20 N force. Mass per unit length of both the strings is same and equal to 1 g/m. When both the strings vibrate simultaneously the number of beats is

A wave in a string has an amplitude of 2 cm. The wave travels in the +ve direction of x axis with a speed of 128 m/s. and it is noted that 5 complete waves fit in 4m length of the string. The equation describing the wave is

A simple pendulum performs simple harmonic motion about x = 0 with an amplitude a and time period T. The speed of the pendulum at x = a/2 will be

A bar magnet having a magnetic moment of 2 $$ \times $$ 10⁴ J T^$$-$$1 is free to rotate in a horizontal plane. A horizontal magnetic field B = 6 $$ \times $$ 10^$$-$$4 T exists in the space. The work done in taking the magnet slowly from a direction parallel to the field to a direction 60^o from the field is

See the electrical circuit shown in this figure. Which of the following equations is a correct equation for it ?

A bus is moving with a speed of 10 ms^$$-$$1 on a straight road. A scooterist wishes to overtake the bus in 100 s. If the bus is at a distance of 1 km from the scooterist, with what speed should the scooterist chase the bus ?