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Which one of the following orders is correct for the bond dissociation enthalpy of halogen molecules?

Option: 1

I_{2}> Br_{2}> Cl_{2}> F_{2}


Option: 2

Cl_{2}> Br_{2}> F_{2}> I_{2}


Option: 3

Br_{2}> I_{2}> F_{2}> Cl_{2}


Option: 4

F_{2}> Cl_{2}> Br_{2}> I_{2}


Following are the two statements regarding the origin of life :

  1. The earliest organisms that appeared on the earth were non-green and presumably anaerobes.
  2. The first autotrophic organisms were the chemoautotrophs that never released oxygen.

Of the above statements which one of the following options is correct?

Option: 1

(a) is correct but (b) is false.


Option: 2

(b) is correct but (a) is false.


Option: 3

Both (a) and (b) are correct.


Option: 4

Both (a) and (b) are false.


HgCl_{2} and I_{2} both when dissolved in water containing I- ions the pair of species formed is:

Option: 1

HgI_{2}, I^{-}


Option: 2

HgI^{2-}_{4}, I^{-}_{3}


Option: 3

Hg_{2}I_{2}, I^{-}


Option: 4

HgI_{2}, I^{-}_{_{3}}


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

Option: 1

\sqrt{2}\hbar


Option: 2

2\sqrt{3}\hbar


Option: 3

0\hbar


Option: 4

\sqrt{6}\hbar


Transfer characteristics [output voltage (V0) vs input voltage (Vi)] for a base biased transistor in CE configuration is as shown in the figure. For using transistor as a switch, it is used:

Option: 1

In region III


Option: 2

Both in region (I) and (III)


Option: 3

In region II


Option: 4

In region I


Which statement is wrong for viruses

Option: 1

All are parasites


Option: 2

All of them have helical symmetry


Option: 3

They have ability ot synthesize nucleic acids and proteins


Option: 4

Antibiotics have no effect on them


Kyoto Protocol was endorsed at:

Option: 1

CoP-4


Option: 2

CoP-3


Option: 3

CoP-5


Option: 4

CoP-6


The tendency of population to remain in genetic equilibrium may be disturbed by:

Option: 1

lack of random mating


Option: 2

random mating


Option: 3

lack of migration


Option: 4

lack of mutations


Select the correct match of the digested products in humans given in column I with their absorption site and mechanism in column II.

Column I

Column II

 

Option: 1

Cholesterol, maltose

large intestine, active absorption

 


Option: 2

Glycine, glucose

small intestine, active absorption

 


Option: 3

Fructose, Na+

small intestine, passive absorption

 


Option: 4

Glycerol, fatty acids

duodenum, move as chilomicrons

 


The Air Prevention and Control of Pollution Act came into force in:

Option: 1

1990


Option: 2

1975


Option: 3

1981


Option: 4

1985


A technique of micropropagation is:

Option: 1

Protoplast fusion


Option: 2

Embryo rescue


Option: 3

Somatic hybridization


Option: 4

Somatic embryogenesis


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

Option: 1

there is no migration


Option: 2

the population is large


Option: 3

individuals mate selectively


Option: 4

there are no mutations


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

Option: 1

6400 J


Option: 2

5400 J


Option: 3

7900 J


Option: 4

8900 J


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

Option: 1

5 x 10-11


Option: 2

8 x 10—11


Option: 3

5 x 107


Option: 4

8 x 107


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:

Option: 1

depends on R and not on V


Option: 2

is independent of both V and R


Option: 3

depends on both V and R


Option: 4

depends on V and not on R


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

Option: 1

S - start of systole


Option: 2

T - end of diastole


Option: 3

P - depolarisation of the atria


Option: 4

R - repolarisation of ventricles


DDT residues are rapidly passed through food chain causing biomagnification because DDT is:

Option: 1

moderately toxic


Option: 2

non-toxic to aquatic animals


Option: 3

water soluble


Option: 4

lipo soluble


Middle lamella is composed mainly of:

Option: 1

Muramic acid


Option: 2

Calcium pectate


Option: 3

Phosphoglycerides


Option: 4

Hemicellulose


The energy absorbed by each molecule (A2) of a substance is 4.4 x 10-19 J and bond energy per molecule is 4.0 x 10-19 J. The kinetic energy of the molecule per atom will be:

Option: 1

2.2 \times 10-19 J


Option: 2

2.0 \times 10-19 J


Option: 3

4.0 \times 10-20 J


Option: 4

2.0 \times 10-20 J


Chipko movement was launched for the protection of

Option: 1

forests


Option: 2

livestock


Option: 3

wet lands


Option: 4

grasslands


One of the commonly used plant growth hormone in tea plantations is

Option: 1

Ethylene


Option: 2

Abscisic acid


Option: 3

Zeatin


Option: 4

Indole - 3 - acetic acid


The displacement of a particle along the x-axis is given by x = asin2\omegat. The motion of the particle corresponds to

Option: 1

Simple harmonic motion of frequency \omega/2\pi


Option: 2

Simple harmonic motion of frequency \omega/\pi


Option: 3

Simple harmonic motion of frequency 3\omega/2\pi


Option: 4

Non simple harmonic motion


The correct order of increasing bond angles in the following species is :

Option: 1

{\rm ClO}_2^ - < Cl2O < ClO2


Option: 2

Cl2O < ClO2 < {\rm ClO}_2^ -


Option: 3

ClO2 < Cl2O < {\rm ClO}_2^ -


Option: 4

Cl2O < {\rm ClO}_2^ - < ClO2


Which one of the following kinds of animals are triploblastic?

Option: 1

Corals


Option: 2

Flat worms


Option: 3

Sponges


Option: 4

Ctenophores


A solution contains Fe2+, Fe3+ and I- ions. This solution was treated with iodine at 35°C. Eo for Fe3+/Fe2+ is +0.77 V and Eo for \mathrm{I_2/2I^- = 0.536\ V}.The favourable redox reaction is :

Option: 1

I- will be oxidised to I2


Option: 2

Fe2+ will be oxidised to Fe3+


Option: 3

I2 will be reduced to I-


Option: 4

There will be no redox reaction


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