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There is a circular tube in a vertical plane.Two liquids which do not mix and of densities d1 and d2 are filled in the tube.Each liquid subtends 900 angle at centre.Radius joining their interface makes an angle \alpha with vertical. Ratio \frac{d_{1}}{d_{2}}  is :

  • Option 1)

    \frac{1+\sin \alpha }{1-\sin \alpha }

  • Option 2)

    \frac{1+\cos \alpha }{1-\cos \alpha }

  • Option 3)

    \frac{1+\tan \alpha }{1-\tan \alpha }

  • Option 4)

    \frac{1+\sin \alpha }{1-\cos \alpha }

 

A particle is performing simple harmonic motion along x-axis with amplitude 4 cm and time period 1.2 sec. The minimum time taken by the particle to move from x =2 cm to x = + 4 cm  and back again is given by

A)            0.6 sec                                     

B)            0.4 sec

C)            0.3 sec                                     

D)            0.2 sec

 

We know about K, C, and F. so why three?
O and N
Why do elements show different properties like odor, appearance, reactions, etc?
You must have noticed in the periodic table that 110-118 elements have Uun, Uuu, Uub...symbol in the periodic table.
sskbcsbc

Coefficient of linear expansion of brass and steel rods are \alpha_{1} and \alpha_{2}. Lengths of brass and steel rods are \l_{1} and \l_{2} respectively. If (\l_{2} -\l_{1}) is maintained same at all temperatures, which one of the following relations holds good?

Option: 1

\alpha_{1}\l_{2}=\alpha_{2}\l_{1}


Option: 2

\alpha_{1}\l_{2}^{2}=\alpha_{2}\l_{1}^{2}


Option: 3

\alpha_{1}^{2}\l_{2}=\alpha_{2}^{2}\l_{1}


Option: 4

\alpha_{1}\l_{1}=\alpha_{2}\l_{2}


The product obtained as a result of a reaction of nitrogen with CaC_{2} is

Option: 1

Ca(CN)_{2}


Option: 2

CaCN


Option: 3

CaCN_{3}


Option: 4

Ca_{2}CN


The figure below is the diagrammatic representation of the E.Coli vector pBR 322. Which one of the given options correctly identifies its certain component (s)?

Option: 1

ori - orignal restriction enzyme


Option: 2

rop-reduced osmotic pressure


Option: 3

Hind III, EcoRI - selectable markers


Option: 4

ampR, tetR - antibiotic resistance genes


Seed coat is not thin, membranous in:

Option: 1

Gram


Option: 2

Maize


Option: 3

Coconut


Option: 4

Groundnut


Select the wrong statement:

Option: 1

Chlamydomonas exhibits both isogamy and anisogamy and Fucus shows oogamy


Option: 2

Isogametes are similar in structure, function and behaviour


Option: 3

Anisogametes differ either in structure, function or behaviour


Option: 4

In Oomycetes female gamete is smaller and motile, while male gamete is larger and non-motile


The complex formed by a pair of synapsed homologous chromosomes is called:

Option: 1

Axoneme


Option: 2

Equatorial plate


Option: 3

Kinetochore


Option: 4

Bivalent


Maximum deviation from ideal gas is expected from:

Option: 1

NH3(g)


Option: 2

H2(g)


Option: 3

N2(g)


Option: 4

CH4(g)


In the given (V - T) diagram, what is the relation between pressures P1 and P2 ?

Option: 1

P_{2}>P_{1}


Option: 2

P_{2}<P_{1}


Option: 3

Cannot be predicted


Option: 4

P_{2}=P_{1}


A current of 2.5 A flows through a coil of inductance 5H. The magnetic flux  (in Wb) linked with the coil is

Option: 1

12.5


Option: 2

0.5


Option: 3

2


Option: 4

0


Which of the following does not give oxygen on heating?

Option: 1

Zn(ClO_3)_2


Option: 2

K_{2}Cr_{2}O_{7}


Option: 3

(NH_{4})_{2}Cr_{2}O_{7}


Option: 4

KClO_{3}


Given 

I and II are

Option: 1

A pair of optical isomers


Option: 2

Identical


Option: 3

A pair of conformers


Option: 4

A pair of geometrical


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

Option: 1

3C, \frac{\text{V}}{3}


Option: 2

\frac{\text{C}}{3},\ 3\text{V}


Option: 3

3\text{C},\ 3\text{V}


Option: 4

\frac{\text{C}}{3},\ \frac{\text{V}}{3}


A young infant may be feeding entirely on mother's milk which is white in colour but the stools which the infant passes out is quite yellowish. What is this yellow colour due to ?

Option: 1

Bile pigments passed through bile juice


Option: 2

Undigested milk protein casein


Option: 3

Pancreatic juice poured into duodenum


Option: 4

Intestinal juice


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

Option: 1

appearance of the darker coloured individuals due to very poor sunlight


Option: 2

protective mimicry


Option: 3

inheritance of darker colour character acquired due to the darker environment


Option: 4

natural selection whereby the darker forms were selected


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

Option: 1

Hershey and Chase


Option: 2

Morgan and Sturtevant


Option: 3

Beadle and Tatum


Option: 4

Nirenberg and Mathaei


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

Option: 1

Ne [3s23p2]


Option: 2

Ar [3d104s24p3 ]


Option: 3

Ne [3s23p1]


Option: 4

Ne [3s23p3]


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

Option: 1

Dipole-dipole interaction


Option: 2

Covalent bonds


Option: 3

London dispersion force


Option: 4

Hydrogen bonding


The rate of the reaction
2NO + Cl_2\rightarrow 2NOCl is given by the rate equation rate = k[NO]^2[Cl_2]

The value of the rate constant can be increased by

Option: 1

Increasing the temperature


Option: 2

Increasing the concentration of NO


Option: 3

Increasing the concentration of the Cl2
 


Option: 4

Doing all of these


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