Recent questions tagged 1999

The K.E. of electron and photon is same then relation between their De-Broglie wavelength :

asked Jun 21, 2018 by pady_1

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Light of wavelength 3000 Å in Photoelectric effect gives electron of max. K.E. 0.5 eV. If wavelength change to 2000 Å then max. K.E. of emitted electrons will be :

asked Jun 21, 2018 by pady_1

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A particle is projected with velocity 'u' makes an angle $\theta w.r.t $horizontal. Now it breaks in two identical parts at highest point of trajectory. If one part is retrace its path, then velocity of other part is -

asked Jun 21, 2018 by pady_1

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A sphere maintained at temperature 600 K, has cooling rate R in an external environment of 200 K temp. If its temp. falls to 400 K then its colling rate will be -

asked Jun 21, 2018 by pady_1

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Initial pressure and volume of a gas are P and V respectively. First its volume is expanded to 4V by isothermal process and then again its volume makes to be V by adiabatic process then its final pressure is ($ \gamma=1.5$) -

asked Jun 21, 2018 by pady_1

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A cylindrical tube (L = 125 cm) is resonant with a tuning fork of frequency 330 Hz. If it is filling by water then to get resonance again, minimum length of water column is$ (V_{air} = 330 m/s)$ -

asked Jun 21, 2018 by pady_1

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Depletion layer has (for an unbiased PN junction) -

asked Jun 21, 2018 by pady_1

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Zener diode is used as -

asked Jun 21, 2018 by pady_1

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Initially plane of coil is parallel to the uniform magnetic field B. In time $\Delta{t}$it makes to perpendicular to the magnetic field, then charge flows in $\Delta{t}$ depends on this time as -

asked Jun 21, 2018 by pady_1

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The value of R for which power in it is maximum-

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If the power dissipated in $5\Omega$ is 20 W then power dissipated in $4 \Omega$

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The effective capacity of the network between terminals A and B is

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The current in$8\Omega$ resistance is (See fig.)

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Simplest reflex action in human is :

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Recently extinct animal from India is :

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Agglutination occurs in blood present in a test tube. This indicate :

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Shell of egg in bird becomes thin (not properly formed) due to the pollution of pesticides. This is due to interference in the activity of :

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Which substance can be used as male contraceptive in future :

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Hybridoma is :

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Minute quantity of hormones & steroid are detected by :

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Maximum photosynthesis takes place by :

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Insectivorous plants grow in the soil which is deficient in :

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Main reason of water bloom in rivers, lakes, sea etc. is :

asked Jun 21, 2018 by pady_1

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Large scale death of fishes occur in :

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Which of following occurs in maximum concentration in blood plasma (ECF) :

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Exchange of bicarbonates and chloride ions between RBC and plasma is called :

asked Jun 21, 2018 by pady_1

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In stomach after physical and chemical digestion food is called :

asked Jun 21, 2018 by pady_1

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Which of the following does not contain metal :

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The allele for tallness is dominant over that of dwarfness. This is called :

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The plant having the largest flower is :

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CCK and secretin secreted by :

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Plant pathogenic bacteria are mostly :

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Which induces the development of corpus Luteum :

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Transition of exarch bundles of root to endarch bundles of stem occurs in :

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Initiation codon in eukaryotes :

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The dipole moment of compound AB is 10.92 D and that of compound CD is 12.45 D. The bond length AB is $2.72 \mathring{A}$ and that of CD is $2.56 \mathring{A}$ then for these compound true statement is :

asked Jun 21, 2018 by pady_1

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Amount of cellular DNA increases during :

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Which of the following is steroid harmones :

asked Jun 21, 2018 by pady_1

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400 ml gas at 500 torr and 666.6 ml gas at 600 torr taken in a container of 3 litre then the total pressure of mixture :

asked Jun 21, 2018 by pady_1

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How many ATP will be formed by oxidation of 1 mole glucose :

asked Jun 21, 2018 by pady_1

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General behaviour of $O_3$ is :

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MgO and NaCl has similar structure. In MgO magnesiuem is surrounded by how many oxygen atoms :

asked Jun 21, 2018 by pady_1

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What is false for mole fraction :

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$H_2 O_2$ on oxidation gives :

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A compound $BA_2$ has$K_{sp}=4\times 10^{-12}$ solubility of this comp. will be :

asked Jun 21, 2018 by pady_1

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$FeCr_2 O_7$ reacts with $Na_2CO_3$ gives the product :

asked Jun 21, 2018 by pady_1

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Compound 'A' in acidic medium does not give ppt with $H_2S$ but in $NH_4OH$ medium gives a ppt comp. 'A' is :

asked Jun 21, 2018 by pady_1

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In a gaseous mixture which of $NO_2$ , $CO_2$ and $N_2 O$ gases have same rate of diffusion :

asked Jun 21, 2018 by pady_1

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$a Zn+b NO_{3}^{-}+cH\to d NH_{4}^{+}+e H_2O+f Zn^{+2}$ a, b, c, d, e and f are :

asked Jun 21, 2018 by pady_1

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In which of the following compound H atom is directly linked with phosphorus :

asked Jun 21, 2018 by pady_1

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