What is true for photolithotrophs?

Which pigment system is inactivated in red drop?

Which pair is wrong?

Cytochrome is

Which plant is LDP?

Which of the following prevents the fall of fruits?

Hormone responsible for senescence is

Which hormone breaks dormancy of potato tuber?

What is correct for blood group O?

What is sarcomere?

Which statement is correct for muscle contraction?

When we migrate from dark to light, we fail to see for sometime but after a time visibility becomes normal. It is example of

Which of the following statements is the characteristics of human cornea?

Which set is similar?

Anemophily type of pollination is found in

In grasses what happens in microspore mother cell for the formation of mature pollen grains?

Adventive embryony in Citrus is due to

Which set is similar : -

In which of the following animals, haemocyanin pigment is found?

Which of the following is less general in characters as compared to genus?

Cauliflower mosaic virus conrains

What is true for cyanobacteria ?

What is true for archaebacteria?

Difference in gram positive and gram negative bacteria is due to

Adhesive pad of fungi penetrate the host with the help of

Cycas has two cotyledons but not included in angiosperms because of

Two nonallelic genes produces the new phenotype when present together but fail to do so independently then it is called : -

In which of the following animals post anal tail is found?

In Hydra, waste material of food digestion and nitrogenous waste material are removed respectively from

Bicarpellary gynoecium and oblique ovary occurs in

Tetradynamous conditions occur in

In which of the following plant sunken stomata are found?

Which is expressing right appropriate pairing?

Edible part of banana is

What is the eye of potato?

Which is correct pair for edible part?

Enzyme first used for nitrogen fixation

In lederberg's replica plating experiment what shall be used to obtain streptomycin resistant strain : -

Which one of the following is correct match ?

L.S.D. is : -

Reason of lung cancer is : -

Interferons are synthesized in response to

Which of the most infectious disease ?

Which of the following is true pair of biofertilizers ?

Spoilage of oil can be detected by which fatty acid : -

A mutant strain of T4 – Bacteriophage, R-II, fails to lyse the E-Coli but when two strains RIIX and R-IIY are mixed then they lyse the E.Coli. What may be the possible reason : -

Salmonella is related with : -

Which of the following cut the DNA from specific places ?

Maximum number of bases in plasmids discovered so far : -

Plant Decomposers are : -

In plants inulin and pectin are

During an injury Nasal septum gets damaged and for it's recovery which cartilage prefered : -

Which cells do not form layer and remains structurally seperate ?

Element necessary for the middle lamella is

Microtubules are absent in : -

Proteinaceous pigment which control the activities concerned with light is

Types of RNA polymerase required in nucleus for RNA synthesis : -

Ratio of complementry genes is : -

When dominant and recessive allels express itself together it is called : -

A and B genes are linked. What shall be genotype of progeny in a cross between AB/ab and ab/ab : -

Independent assortment of genes does not takes place when : -

Number of Barr bodies in XXXX female is

Sickle cell anaemia is induce to : -

Male XX and female XY sometime occur due to

Probability of four son to a couple is : -

In Negative operon : -

m-RNA is synthesised on DNA template in which direction : -

Gene and cistron words are sometimes used synonymously because : -

Which statement is correct about centre of origin of plant ?

Half life period of C¹⁴ is : -

Reason of diversity in living being : -

Most abundant organic compound on earth is

Similarities in organism with different genotype indicates : -

Which of the following is closest relative of man ?

Which of the following is correct order of the evolutionary history of man ?

First life on earth was : -

Forthcoming generations are less adaptive than their parental generation due to

Occurrence of endemic species in South America and Australia is due to

Darwins theory of pangenesis shows similarity with theory of inheritance of acquired characters then what shall be correct according to it

Which of the following will give maximum number of isomers?

Which statement is incorrect?

Which of the following organometallic compounds is $$\sigma $$ and $$\pi $$ bonded?

Which of the following will exhibit maximum ionic conductivity?

Coordination number of Ni in [Ni(C₂O₄)₃]^4$$-$$ is

An organic compound A(C₄H₉Cl) on reaction with Na/diethyl ether gives a hydrocarbon which on monochlorination gives only one chloro derivative then, A is

obtained by chlorination of n-butane will be

Which of the following is correct?

Which of the following give positive Fehling solution test?

Which alkene on ozonolysis gives CH₃CH₂CHO and CH₃COCH₃?

Intermediates formed during reaction of

are

Which of the following is correct about H-bonding in nucleotide?

Which of the following is correct?

Which statement is incorrect about peptide bond?

Which is the correct statement?

A compound of molecular formula C₇H₁₆ shows optical isomerism, compound will be

Pure water can be obtained from sea water by

Standard electrode potentials are
Fe²⁺/Fe [E^o = $$-$$0.44] and
Fe³⁺/Fe²⁺[ E^o = 0.77];
If Fe²⁺, Fe³⁺ and Fe blocks are kept together, then

When a bio-chemical reaction is carried out in laboratory, outside the human body in absence of enzyme, then rate of reaction obtained is 10^$$-$$6 times, the activation energy of reaction in the presence of enzyme is

For the reaction;

2N₂O₅ $$ \to $$ 4NO₂ + O₂ rate and rate constant are 1.02 $$ \times $$ 10^$$-$$4 and 3.4 $$ \times $$ 10^$$-$$5 sec^$$-$$1 respectively, then concentration of N₂O₅ at that time will be

Correct order of 1^st ionization potential among following elements Be, B, C, N, O is

Which of the following statement is not correct?

The most convenient method to protect the botton of ship made of iron is

A human body required 0.01 m activity of radioactive substance after 24 hours. Half life of radioactive substance is 6 hours. Then inhection of maximum activity of radioactive substance that can be injected is

If a $${}_b^aX$$ species emits first a position, then two a and two b particles and in the last, one a, is also emitted and gets converts to $${}_d^c$$Y species. So correct relation is

PbO₂  $$ \to $$ PbO; $$\Delta $$G₂₉₈ < 0
SnO₂ $$ \to $$ SnO;  $$\Delta $$G₂₉₈ > 0

Most probable oxidation state of Pb and Sn will be

Molarity of liquid HCl, if density of solution is 1.17 g/ce is

Percentage of Se in peroxidase anhydrous enzyme is 0.5% by weight (at. wt. = 78.4) then minimum molecular weight of peroxide anhydrous enzyme is

Specific volume of cylinfrical virus particle is 6.02 $$ \times $$ 10^$$-$$2 cc/g whose radius and length are 7 $$\mathop A\limits^ \circ $$ and 10 $$\mathop A\limits^ \circ $$ respectively. If _NA = 6.02 $$ \times $$ 10²³, find molecular weight of virus.

Main axis of a diatomic molecule is z, molecular orbital p_x and p_y overlap to from which of the following orbitals.

The following quantum numbers are possible for how many orbitals :

n = 3, $$l$$ = 2, m = +2 ?

Which of the following two are isostructural?

Nitrogen forms N₂, but phosphorus does not form P₂, however, it converts P₄, reason is

In which of the following bond angle is maximum ?

In X - H --- Y, X and Y both are electronegative elements. Then

Change in enthalpy for reaction,

2H₂O_2(l) $$ \to $$ 2H₂O_(l) + O_2(g)

if heat of formation of H₂O_2(l) and H₂O_(l) are $$-$$188 and - 286 kJ/mol respectively, is

When 1 mol of gas is heated at constant volume temperature is raised from 298 to 308 K. Heat supplied to the gas is 500 J. Then which statement is correct ?

Enthalpy of CH₄ + $${1 \over 2}$$ O₂ $$ \to $$ CH₃OH is negative. If enthalpy of combustion of CH₄ and CH₃OH are x and y respectively. Then which relation is correct?

In HS^$$-$$, I^$$-$$, R $$-$$ NH₂, NH₃ order of proton accepting tendency will be

Ionisation constant of CH₃COOH is 1.7 $$ \times $$ 10^$$-$$5 and concentration of H⁺ ions is 3.4 $$ \times $$ 10^$$-$$4. Then find out initial concentration of CH₃COOH molecules.

Solubility of M₂S salt is 3.5 $$ \times $$ 10^$$-$$6 then find out solubility product.

Correct relation between dissociation constants of a dibasic acid is

Which of the following is incorrect?

The incorrect IUPAC name is

In steam distillation of toluene, the pressure of toluene in vapour is

In preparation of alkene from alcohol using Al₂O₃ which is the effective factor ?

The correct acidic order of the following is

In Thomson mass spectrograph $$\overrightarrow E \bot \overrightarrow B $$ then the velocity of electron beam will be

If number of turns, area and current through a coil is given by n, A and $$i$$ respectively then its magnetic moment will be

An electron having mass m and kinetic energy E anter in uniform magnetic field B perpendiculaly, then its frequency will be

Among which the magnetic susceptibility does not depened on the temperature ?

Tangent galvanometer is used to measure

For a coil having L = 2 mH, current flow through it is $$I = {t^2}{e^{ - t}}$$ then, the time at which emf become zero

A capacitor of capacity C has reactance X. If capacitance and frequency become double then reactance will be

The value of quality factor is

Biological inportance of ozone layer is

A ray of light travelling in air have wavelength $$\lambda $$, frequency n, velocity v and intensity $$I$$. If this ray enters into water then these parameters are $$\lambda $$', n', v' and $$I$$' respectively. Which relation is correct from following ?

Optical fibre are based on

A disc is placed on a surface of pond which has refractive index 5/3. A source of light is placed 4 m below the surface of liquid. The minimum radius of disc needed so that light is not coming out is,

If specific resistance of a potentiometer wire is 10^-7$$\Omega $$ m and current flow through it is 0.1 amp., cross-sectional area of wire is 10^$$-$$6 m² then potential gradient will be

Which one among the following shows particle nature of light?

A photo-cell is illuminated by a source of light, which is placed at a distance d from the cell. If the distance become d/2, then number of electrons emitted per second, will be

X(n, $$\alpha $$) $${}_3^7$$Li, then X will be

The interplanar distance in a crystal is 2.8 $$ \times $$ 10^$$-$$8 m. The value of maximum wavelength which can be diffracted

M_n and M_p represent the mass of neutron and proton respectively. An element having mass M has N neutrons and Z protons, then the correct relation will be

The energy of hydrogen atom in n^th orbit is E_n then the energy in n^th orbit of singly ionised helium atom will be

Energy released in nuclear fission is due to

The given truth table is for which logic gate

              $$\matrix{ A & B & Y \cr 1 & 1 & 0 \cr 0 & 1 & 1 \cr 1 & 0 & 1 \cr 0 & 0 & 1 \cr } $$

With what velocity should a particle be projected so that its height becomes equal to radius of earth?

A particle is thrown vertically upward. Its velocity at half of the height is 10 m/s, then the maximum height attained by it (g = 10 m/s²)

If $$\left| {\overrightarrow A + \overrightarrow B } \right| = \left| {\overrightarrow A } \right| + \left| {\overrightarrow B } \right|$$ then angle between A and B will be

Two particles having mass M and m are moving in a circular path having radius R and r. If their time period are same then the ratio of angular velocity will be

250 N force is required to raise 75 kg mass from a pulley. If rope is pulled 12 m then the load is lifted to 3 m. the efficiency of pulley system will be

On the horizontal surface of a truck a block of mass 1 kg is placed (m = 0.6) and truck is moving with acceleration 5 m/sec² then the frictional force on the block will be

A cricketer catches a ball of mass 150 gm in 0.1 sec moving with speed 20 m/s, then he experiences force of

A 1 kg stationary bomb is exploted in three parts having mass 1 : 1 : 3 respectively. Parts having same mass move in perpendicular direction with velocity 30 m/s, then the velocity of bigger part will be

A child is sitting on a swing. Its minimum and maximum heights from the ground 0.75 m and 2 m respectively, its maximum speed will be

A particle is projected making an angle of 45^o with horizontal having kinetic energy K. The kinetic energy at highest point will be

Two springs A and B having spring constant K_A and K_B (K_A = 2K_B) are stretched by applying force of equal magnitude. If energy stored in spring A is E_A then energy stored in B will be

A disc is rolling, the velocity of its centre of mass is v_cm. Which one will be correct?

The current in the circuit will be

A cylindrical rod having temperature T₁ and T₂ at its end. The rate of flow of heat Q₁ cal/sec. If all the linear dimension are doubled keeping temperature constant, then rate of flow of heat Q₂ will be

A scientist says that the efficiency of his heat engine which work at source temperature 127^oC and sink temperature 27^oC is 26%, then

The total energy of particle performing SHM depend on

Two waves having equation x₁ = $$a$$sin($$\omega $$t $$-$$ kx + $$\phi $$₁), x₂ = asin($$\omega $$t $$-$$kx + $$\phi $$₂). If in the resultant wave the frequency and amplitude remain equal to amplitude of superimposing waves, the phase difference between them is

The equation of a wave is represented by

y $$=$$ 10^$$-$$4 sin(100t $$-$$ $${x \over {10}}$$) m. then the velocity of wave will be

If the tension and diameter of a sonometer wire of fundamental frequency n is doubled and density is halved then its fundamental frequency will become

A dipole of dipole moment $$\overrightarrow p $$ is placed in uniform electric field $$\overrightarrow E $$ then torque acting on it is given by

A charge Q$$\mu $$C is placed at the centre of a cube, the flux coming out from each face will be

Energy per unit volume for a capacitor having area A and separation d kept at potential difference V is given by

The resistance of each arm of the Wheatstone's bridge is 10 ohm. A resistance of 10 ohm is connected in series with a galvanometer then the equivalent resistance across the battery will be

Copper and silicon is cooled from 300 K to 60 K , the specific resistance

The dimensions of Planck's constant equals to that of