The radius of a planet is twice the radius of earth. Both have almost equal average mass-densities. If V_{p} and V_{E} are escape velocities of the planet and the earth, respectively, then

Option: 1

V_{E}=1.5V_{P}


Option: 2

V_{p} = 1.5 V_{E}


Option: 3

V_{p}=2V_{E}


Option: 4

V_{E}=3V{p}


Aqueous solution of which of the following compounds is the best conductor of electric current?

Option: 1

Acetic Acid, C2H4O2


Option: 2

Hydrochloric Acid, HCl


Option: 3

Ammonia, NH3


Option: 4

Fructose, C6H12O6


Name the pulmonary disease in which alveolar surface area involved in gas exchange is drastically reduced due to damage in the alveolar walls.

 

Option: 1

Emphysema


Option: 2

Pneumonia


Option: 3

Asthma


Option: 4

Pleurisy


The position vector of a particle \mathop \text{R}\limits^ \to as a function of time is given by :

\mathop \text{R}\limits^ \to = 4\sin \left( {2\pi t} \right)\hat i + 4\cos \left( {2\pi t} \right)\hat j

Where R is in meters, t is in seconds \hat i and \hat j   denote unit vectors along x-and y-directions, respectively. Which one of the following statements is wrong for the motion of particle ?

 

Option: 1

Magnitude of acceleration vector is \frac{{\upsilon ^2 }} {\text{R}} where \upsilon is the velocity of particle.


Option: 2

Magnitude of the velocity of particle is 8 meter/ second


Option: 3

Path of the particle is a circle of radius 4 meter.

 


Option: 4

Acceleration vector is along  - \mathop \text{R}\limits^ \to .


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 v (higher than the threshold frequency v0) is proportional to:

Option: 1

3 x 1016


Option: 2

9 x 1015


Option: 3

3 x 1019


Option: 4

9 x 1017


Which one of the following pairs of food components in humans reaches the stomach totally undigested?

Option: 1

Starch and fat


Option: 2

Fat and cellulose


Option: 3

Starch and cellulose


Option: 4

Protein and starch


Elbow joint is an example of:

Option: 1

hinge joint


Option: 2

gliding joint


Option: 3

ball and socket joint


Option: 4

pivot joint


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

Option: 1

ribose


Option: 2

gene


Option: 3

nucleoside


Option: 4

nucleotide


Signals from fully developed foetus and placenta ultimately lead to parturition which requires the release of

Option: 1

Estrogen from placenta


Option: 2

Oxytocin from maternal pituitary


Option: 3

Oxytocin from foetal pituitary


Option: 4

Relaxin from placenta


The electron in the hydrogen atom jumps from excited state (n = 3) to its ground state (n = 1) and the photons thus emitted irradiate a photosensitive material. If the work function of the material is 5.1 eV, the stopping potential is estimated to be (the energy of the electron in nth state \text{E}_{\text{n}}=-\frac{13.6}{\text{n}^{2}}\text{ev})

Option: 1

5.1 V


Option: 2

12.1 V


Option: 3

17.2 V


Option: 4

7 V


Photoperiodism was first characterised in

Option: 1

Cotton


Option: 2

Tobacco


Option: 3

Potato


Option: 4

Tomato


A renewable exhaustible natural resource is

Option: 1

Forest


Option: 2

Coal


Option: 3

Petroleum


Option: 4

Minerals


Stirred-tank bioreactors have been designed for

Option: 1

Availability of oxygen throughout the process


Option: 2

Addition of preservatives to the product


Option: 3

Purification of the product


Option: 4

Ensuring anaerobic conditions in the culture vessel


The logistic population growth is expressed by the equation

Option: 1

dN/dt=rN


Option: 2

\text{dN}/\text{dt}=\text{rN}\left ( \frac{\text{N}-\text{K}}{\text{N}} \right )


Option: 3

\text{dt}/\text{dN}=\text{Nr}\left ( \frac{\text{K}-\text{N}}{\text{K}} \right )


Option: 4

\text{dN}/\text{dt}=\text{rN}\left ( \frac{\text{K}-\text{N}}{\text{K}} \right )


Match list-I with List-II for the composition of substances and select the correct answer using the code given below the lists

 

  List - I
Substances
 

List - II
Composition

(A)

Plaster of Paris (i)

CaSO4.2H2O

(B) Epsomite (ii) \text{CaSO}_{4.}\frac{1}{2}\text{H}_{2}\text{O}
(C) Kieserite (iii)

MgSO4.7H2O

(D) Gypsum (iv)

MgSO4.H2O

    (v)

CaSO4

Code:

        (A)                (B)            (C)                (D)

Option: 1

(i)                    (ii)                (iii)                   (v)


Option: 2

(iv)                    (iii)                (ii)                   (i)


Option: 3

(iii)                    (iv)                (i)                   (ii)


Option: 4

(ii)                    (iii)                (iv)                   (i)


The following reactions take place in the blast furnace in the preparation of impure iron. Identify the reaction pertaining to the formation of the slag.

Option: 1

CaO(s) + SiO_{2}(s)\rightarrow CaSiO_{3}(s)


Option: 2

2C(s)+O_{2}(g)\rightarrow 2CO_{2}(g)


Option: 3

Fe_{2}O_{3}(s) + 3CO(g)\rightarrow 2Fe(l) + 3CO_{2}(g)


Option: 4

CaCO_{3}(s) \rightarrow CaO(s) + CO_{2}(g)


A radioactive nucleus of mass M emits a photon of frequency v and the nucleus recoils. The recoil energy will be:

Option: 1

hv


Option: 2

Mc2 - hv


Option: 3

h2v2/ 2 MC2


Option: 4

zero


The van't Hoff factor i for a compound which undergoes dissociation in one solvent and association in other solvent is respectively :

Option: 1

Greater than one and greater than one


Option: 2

Less than one and greater than one


Option: 3

Less than one and less than one


Option: 4

Greater than one and less than one


Which one of the following statements for the order of a reaction is incorrect?

Option: 1

Order of reaction is always whole number


Option: 2

Order can be determined only experimentally


Option: 3

Order is not influenced by stoichiometric coefficient of the reactants


Option: 4

Order of reaction is sum of power to the concentration terms of reactants to express the rate of reaction


The correct order of increasing bond length of C-H, C-O, C-C and C=C is:

Option: 1

C-H < C-O < C-C < C=C

 


Option: 2

C-H < C=C < C-O < C-C


Option: 3

C-C < C=C < C-O < C-H


Option: 4

C-O < C-H < C-C < C=C


Which one of the following is present as an active ingredient in bleaching powder for bleaching action?

Option: 1

CaCl2


Option: 2

CaOCl2


Option: 3

Ca(OCl)2


Option: 4

CaO2Cl


In a set of reactions m-bromobenzoic acid gave a product D. Identify the product D.

Option: 1


Option: 2


Option: 3


Option: 4


Glandular tissues of each breast is divided into 

Option: 1

15-20 mammary tubes 


Option: 2

15-20 mammary ducts 


Option: 3

15-20 mammary lobes 


Option: 4

None of these 


Identify the figures of the contraceptives given below and and select the correct option:

Option: 1

A                                              B                                  C                                  D

Condom for female                Implant                         CuT                               Condom for male


Option: 2

A                                             B                                       C                                     D

Implant                                 CuT                               Condom for female        Condom for male


Option: 3

A                                             B                                       C                                           D

Condom for male                   CuT                               Implant                         Condom for female

 


Option: 4

A                                           B                                       C                                      D

Condom for male                 Implant                            CuT                               Condom for female


Embryo sac of flowering plants develop from 

Option: 1

Zygote 


Option: 2

megaspore 


Option: 3

nucellus 


Option: 4

Embryo 


Exams
Articles
Questions