The radius of a planet is twice the radius of earth. Both have almost equal average mass-densities. If and are escape velocities of the planet and the earth, respectively, then
Aqueous solution of which of the following compounds is the best conductor of electric current?
Acetic Acid, C2H4O2
Hydrochloric Acid, HCl
Ammonia, NH3
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.
Emphysema
Pneumonia
Asthma
Pleurisy
The position vector of a particle as a function of time is given by :
Where R is in meters, t is in seconds and denote unit vectors along x-and y-directions, respectively. Which one of the following statements is wrong for the motion of particle ?
Magnitude of acceleration vector is where is the velocity of particle.
Magnitude of the velocity of particle is 8 meter/ second
Path of the particle is a circle of radius 4 meter.
Acceleration vector is along .
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:
3 x 1016
9 x 1015
3 x 1019
9 x 1017
Which one of the following pairs of food components in humans reaches the stomach totally undigested?
Starch and fat
Fat and cellulose
Starch and cellulose
Protein and starch
Elbow joint is an example of:
hinge joint
gliding joint
ball and socket joint
pivot joint
The segment of DNA which acts as the instrumental manual for the synthesis of the protein is:
ribose
gene
nucleoside
nucleotide
Signals from fully developed foetus and placenta ultimately lead to parturition which requires the release of
Estrogen from placenta
Oxytocin from maternal pituitary
Oxytocin from foetal pituitary
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 )
5.1 V
12.1 V
17.2 V
7 V
Photoperiodism was first characterised in
Cotton
Tobacco
Potato
Tomato
A renewable exhaustible natural resource is
Forest
Coal
Petroleum
Minerals
Stirred-tank bioreactors have been designed for
Availability of oxygen throughout the process
Addition of preservatives to the product
Purification of the product
Ensuring anaerobic conditions in the culture vessel
The logistic population growth is expressed by the equation
dN/dt=rN
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 |
||
---|---|---|---|
(A) |
Plaster of Paris | (i) |
CaSO4.2H2O |
(B) | Epsomite | (ii) | |
(C) | Kieserite | (iii) |
MgSO4.7H2O |
(D) | Gypsum | (iv) |
MgSO4.H2O |
(v) |
CaSO4 |
Code:
(A) (B) (C) (D)
(i) (ii) (iii) (v)
(iv) (iii) (ii) (i)
(iii) (iv) (i) (ii)
(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.
A radioactive nucleus of mass M emits a photon of frequency v and the nucleus recoils. The recoil energy will be:
hv
Mc2 - hv
h2v2/ 2 MC2
zero
The van't Hoff factor i for a compound which undergoes dissociation in one solvent and association in other solvent is respectively :
Greater than one and greater than one
Less than one and greater than one
Less than one and less than one
Greater than one and less than one
Which one of the following statements for the order of a reaction is incorrect?
Order of reaction is always whole number
Order can be determined only experimentally
Order is not influenced by stoichiometric coefficient of the reactants
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:
C-H < C-O < C-C < C=C
C-H < C=C < C-O < C-C
C-C < C=C < C-O < C-H
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?
CaCl2
CaOCl2
Ca(OCl)2
CaO2Cl
In a set of reactions m-bromobenzoic acid gave a product D. Identify the product D.
Glandular tissues of each breast is divided into
15-20 mammary tubes
15-20 mammary ducts
15-20 mammary lobes
None of these
Identify the figures of the contraceptives given below and and select the correct option:
A B C D
Condom for female Implant CuT Condom for male
A B C D
Implant CuT Condom for female Condom for male
A B C D
Condom for male CuT Implant Condom for female
A B C D
Condom for male Implant CuT Condom for female
Embryo sac of flowering plants develop from
Zygote
megaspore
nucellus
Embryo