Level 5 Challenge

According to one of the most accepted theory the earth atmosphere before any life had originated consisted of H₂O, H₂, NH₂ and

A eukaryotic gene contain two kinds of base sequences. Which of these plays an important role in protein synthesis?

The macronutrient which is an essential component of all organic compounds, yet not obtained by plants from soil is

The natural cycles of carbon, oxygen, nitrogen, water and phosphorus, sulphur, etc are collectively called as

Two places in India show maximum biological diversity. One of them is the Western ghat, another is

Which of the following communities is more vulnerable to invasion by outside animals and plants

Mating between two individuals differing in genotype to produce genetic variation is called

If a sample of blood shows clumping with antiserum A but not with antiserum B then it is

The enzyme that increases the reaction rate between CO₂ and H₂O in red blood cells is

Which of the following chambers of ruminant stomach contains the gastric juice

The release of pancreatic juice from the pancreas in a mammal is stimulated by

In photosynthesis, splitting of water molecule and release of oxygen is called

Photochemical smog formed in congested metropolitan cities mainly consists of

Which of the following gene is responsible for biological nitrogen fixation

Automobile exhaust causes respiratory problems because of the presence of

Then process of the escape of liquid from tip of uninjured leaf is called

A good example of organic fertilizer which improves phosphorus uptake is

Which part of the leaf is meant for photosynthesis and gaseous exchange?

Structure found in blue green algae which helps in nitrogen fixation is

Gibberellins can promote seed germination because of their influence on

Which of the following is the source of energy for muscle contraction?

In piped water supply system, water is often treated with chlorine to

Earthworm and cockroach have which of the following thing in common?

Most abundant water insoluble polysaccharide of plant cell wall is

Equipment used for the measurement of growth in plants is known as

Which is more efficient medium for oxygen uptake in respiration?

Which of the following is the most evident source of evolution?

Which of the following is an example of sex-linked inheritance?

Mechanism of ATP production in aerobic respiration was given by

In the development of a frog, the gastrulation process involves

Heating food to 100° C will prevent all but following diseases

Cardiac muscles are different from that of skeletal muscles as

The plants which flower once in their lifetime are called as

Which of these are most widely used in genetic engineering?

The phenomenon ‘ontogeny repeats phylogeny’ is explained by

When vegetative cells of zygote form embryo, it is called

Chromosome duplication without nuclear division refers to

Menstrual flow occurs due to decrease in level of hormone

Desert grasses often roll their leaves due to presence of

The common biosynthetic inhibitor of gibberellic acid is

In angiosperms, which of the following part is triploid?

One mole of ATP on hydrolosis yield energy equivalent to

Which structure is not the characteristic of mushrooms?

Muscular wall of the heart is externally covered with

Protozoans lack which of these as locomotary organs?

Photosynthesis occurs with mimimum loss of water is

Which of the following is the largest root parasite

Which of the following plant virus has DNA in it

The virus, that infects bacteria, are made up of

Which of the following virus causes common cold?

Eggs containing a large amount of yolk is called

Which hormone is responsible for fruit ripening?

Infective stage of Plasmodium vivax to human is

In mollusca, eye is present over a stalk called

The distance between two nucleotides in DNA is

The transgenetic animals are those which have

Connecting link between reptiles and birds is

Nerve impulse initiates with the movements of

Secondary phloem remains functional generally

Enzymes, which help in electron transfer are

The ‘end organs of Ruffini’ are receptors of

Best type of pyramid which is always true is

Bone is connected to muscle with the help of

Polymerase chain reaction (PCR) is used for

Viruses cannot reproduce on its own because

Streptococcus is used in the preparation of

Reproduction in Paramecium is controlled by

Recombinant DNA technology is related with

Muscles get fatigue due to accumulation of

During diastole, the heart is filled with

The endosperm in angiosperm develops from

Acid rain is due to the pollution by

Viral diseases have no cure because

A fungal disease of the poultry is

Graafian follicies are formed from

Vertebral column is derived from

Glycolysis occurs in which cells

A pleiotropic gene is one which

Choroid plexus is a network of

CO₂ compensation point will be

Cellular respiration starts in

Retina is most sensitive at

Spirulina is rich source of

Hinge joint occurs between

Velamen is found in

Synovial joint is

Decomposers are

Hydroponics is

Serum is

Man is a

When 4g of iron is burnt to ferric oxide at constant pressure, 29.28 kJ of heat is evolved. What is the enthalphy of formation of ferric oxide? (At. Wt of Fe=56)

The wavelength of the radiation emitted when an electron drops from 3rd orbit to 2nd orbit in H – atom will be nearly

After tow hours, the ratioactive substance becomes 1/16th of original amount. Then the half -life (in min) is

The interatomic distances in H₂ and Cl molecules are 74 and 198 pm respectively. The bond length of HCl is

If increase in temperature and volume of an ideal gas is two times, then the initial pressure P changes to

40 mg of pure sodium peroxide is dissolved in 10L of distilled water. The pH of the solution is

If a 0.00001 M solution of HCl is diluted thousand folds the pH of the resulting solution is

If glycerol is heated with oxalic acid at certain temperature,it gives an acid.The acid is

12 g of an alkaline earth metal gives 14.8 g of its nitride .Atomic weight of the metal is

Which of the following sets of quantum numbers violates the rules of quantum mechanics

Which of the following is obdained when acetone is treated with bleaching powder

The gas which combin with haemoglobin to damage its oxygen carrying capacity is

The reaction of which of the following compounds would yield secondary amine

The silver salt of a fatty acid on refluxing with an alkyl halide gives an

What is the general outer electronic configuration of the coinage metals?

Gem-dihalides are hydrolysed with either acid or basic catalysts to give

If P is pressure and D is density of a gas, then P and D are related as

The common oxidation state shown by lanthanides in their compounds is

Oxidation number of iodine in IO₃⁻, IO₄⁻, KI and I₂ respectively are

Ozone is formed in the upper atmosphere from oxygen by the action of

Which of the following can not be hydrolysed into aldose and ketose

In Zinc blende structure, the coordination number of the cation is

Which one of the following gives only one monochloro derivative

Which of the following hydrides is electron deficient molecule?

Molar conductivity decreases with decrease in concentration

Which of the following complex has square planar structure

Which of the following ions has the maximum magnetic moment

Which of the following amino acid is optically inactive

Which of the following is not an organometallic compound

If a neutral atoms is converted into a cation, then its

Number of molecules in one litre of water is close to

Hydrolysis of trichloromethane with aqueous KOH gives

Allergy is the state in which a person experiences

Which of the following compounds is efflorescent?

Which of the following does not contain aluminium

Which of the following has tetrahedral

Which will show geometrical isomerism

Osmotic pressure can be increased by

Which of the following is an emulsion

The IUPAC name of CH₂=CHCH(CH₃)₂ is

The oxidising ability of halogens

Carbylamine reaction is given by

A tertiary alcohol is obtained

Which azide is explosive

The shape of benzene is

Two strings A and B, made of same material are stretched by same tension. The radius of string A is double the radius of B. A transverse wave travels on A with speed Va and on B with speed Vb. The ratio of Va/Vb is

Time period of the rotation of the earth about its own axis is 24 hour. Mass and radius of the earth are 6 x 10²⁴ kg and 6.4 x 10⁶ m respectively. The rotational kinetic energy of the earth about its own axis is

A gas is suddenly expanded such that its final volume becomes 3 times its intial volume. If the specific heat at constant volume of the gas (Cv)=2R. Then the ratio of initial to final pressure is nearly equal to

A calorimeter contains 0.2 kg of water at 30° C. 0.1kg of water at 60° C is added to it. The mixture is well stirred and the resulting temperature is found to be 35° C. The heat capacity of the calorimeter is

The current in the windings of a toroid is 2.0 A. There are 400 turns and the mean circumferential length is 40 cm. If the inside magnetic field is 1.0 T, the relative permeability is approximately

A light whose frequency is equal to 6.0 x 10¹⁴ Hz is incident on a metal whose work function is 2 eV. (h= 6.63 x 10⁻³⁴ Js, 1 ev = 1.6 x 10⁻¹⁹ J). The maximum energy of the electron emitted will be

Two bodies of mass 0.25 kg each moving towards each other with velocity 3 m/s and 1 m/s respectively. After collision they stick together. The velocity of the combination will be

Monochromatic light of frequency 6.0 x 10¹⁴ Hz is produced by a laser. The power emitted is 2 x 10⁻³ W. The number of photons emitted, on the average by the source per second is

A body of mass 2 kg is kept by pressing to a vertical wall by a force of 100 N. The coefficient of static friction between wall and body is 0.3. Then the frictional force is

A body of mass m is orbiting the earth at a radius r from the center of earth. Another body of mass 2m is orbiting at a radius 2r. What is the ratio of their time period?

With the decrease of current in the primary coil from 2 amperes to zero value in 0.01sec, the emf generated in the secondary coil is 1000 volts. The mutual inductance is

A wire of length 1 m is placed in a uniform magnetic field of 1.5 tesla at an angle of 30° to it. The current in the wire is 10 amp. Then the force on the wire will be

64 drops of mercury, each charged to a potential of 10 V, are combined to form one bigger drop. The potential of this drop will be(Assume all drops are spherical)

When the angle of incidence is 60° on the surface of a glass slab, it is found that the reflected ray is completely polarised. The velocity of light in glass is

A magnetic field of 1600 A/m produces a magnetic flux of 2.4 x 10⁻⁵ Wb in an iron bar of cross-sectional area 0.2 cm². The susceptibility of the iron bar is

A Galilean telescope has an objective of focal length 100 cm and magnifying power 50. The distance between the two lenses in normal adjustment will be

Two simple harmonic motions of angular frequency 100 and 1000 rad/s have the same displacement amplitude. The ratio of their maximum acceleration is

A beaker of radius 1.5 cm is filled with a liquid of surface tension 0.075 N/m. Force across an imaginary diameter on the surface of the liquid is

In an LCR series A.C circuit, the voltage across each of the components, L, C and R is 50V. The voltage across the L.C combination will be

A point source is kept at a distnace 1000m has an illumination I. To change the illumination to 16I, the new distance should become

Element ²³⁴U has 92 protons and 234 nucleons in its nucleus. It decays by emitting an alpha particle. After the decay it becomes

A boat of anchor is rocked by waves whose crests are 100 m apart and velocity is 25 m/s. The boat bounces up once in every

A body of mass m=3.513 kg is moving along the x-axis with a speed of 5 m/s. The magnitude of its momentum is recorded as

A bullet comes out of the barrel of gun of length 2m with a speed of 800 m/s. The average acceleration of the bullet is

Ring, hollow ring and solid sphere are rolled down from inclined plane. Which will take less time to reach the ground?

When a spring is extended by 2 cm energy stored is 100 J. When extended further by 2 cm, the energy increases by

The resistance of a wire is 5 ohm at 50° C and 6 ohm at 100° C. The resistance of the wire at 0° C will be

If the lattice parameter for a crystalline structure is 3.6 Å, then the atomic radius in fcc crystal is

A black body is heated from 27° C to 127° C. The ratio of their energies of radiations emitted will be

The rest mass of a body is m1. It moves with a velocity of 0.6c, then its relativistic mass if m then