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For CBSE physics board practicals,we are required to do 1 experiment and 2 activities. there do we need to perform them and show the settings to the external? also in chemistry practicals for detection of the inorganic and th ...

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1. By emission of which of the following element remains unchanged a) β^- decay b) γ decay 2. Two lens of power –15D and +5D are placed is contact co-axially. The focal length of equlvalent lens is (A) –10 cm (B) –20 ...

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Draw and explain the output waveform across load resistor if input waveform is shown in fig *Image* ...

In youngs double slit experiment the distance between slits is d. The distance between slits and screen is a. With help of wavelength L no. of fringes observed per metre on screen will be?????? ...

1)3 particles of equal mass M are moving on a circular path with radius r under their mutual gravitational attraction.the speed of each particle is: a)√(GM/√2R) b)√(GM/√3R) c)√(GM/2R) d)√(GM/3R) 2)in a double star ...

*Image* a needle has been placed in each end of a broomstick,the tips of needles resting on the edges of a filled wine glass. the experimenter strikes the broomstick a swift blow with a stout rod .the broomstick breaks and fa ...

1. Statement-I : The sum of mole fraction of all the components of a solutioin is unity. Statement-II : Mole fraction is temperature dependent. 2. Statement-I : Decrease in free energy comes spontaneons reaction. Statement-II ...

\int_{0}^{100\pi }{} (sin x)(e^{(\mid cos x\mid + \mid sin x\mid )})(log \mid sin x\mid ) dx is equal to A) 100 B)2 C) 0 D)50 \pi ...

Explain tetrahedral Ni (II) complexes are Paramagnetic but squaire planar Ni (II) complexes are diamagnetic. ...

Number of soln.s of the equation \mid x^{2} - 1\mid = k^{2} + 4k + 1 is 4,then k may belong to A) (-4, - 3.8) B) (-4, - 3.7) C) [-3.9, - 3.8] D) (-4, - 2 - 3 ) ...

1.If the total number of neutrons and protons in a nuclear reaction is conserved, how then is the energy absorbed or evolved in the reaction ? Explain. 2. Compare the radii of two nuclel of mass numbers A1 & A2. ...

A letter is chosen at random from the word ' FAVOURABLE '. what is the probability that the chosen letter is a vowel ? ...

A converging and a diverging lens of equal focal lengths are placed co-axially in contact find the power and the focal length of the combination. ...

COL I 1. Frequency of LC Oscillation 2. Mean Circuit power 3. LCR series 4. LCR resonant series COL II a) Resistive circuit b) Impedance c) I^2 Zcos φ d) 1/2piundrtLC ...

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(IIT 1984 - Multi ans correct) White light is used to illuminate the 2 slits in a Young's double slit experiment.The separation between the slits is b and the screen is at a distance d(>b) from the slits.At a point on the ...

anyone having contact details regarding bitsta2010 plz send them in this therad! ...

Number of solution(s) of the equation cos^{-1}(e^{x}) + sin^{-1}(kx^{2}-2)=\frac{\pi }{2},k>0, is A)0 B) 1 C) 2 D) infinite ...

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1/ Which of the following metals have both valence and penultimate shell partially filled A. Cr B.Mo C.Cu D.Zn 2/ Which wil give ammonia with water A. Mg3N2 B.AIN C.CaCN2 D.Ca(CN)2 ...

let a 602 digit number 111100111100111100.........................11110013 find the remainder when it is divided by 13 ...

ncert question hai.....pahli baar kitab kholi hai....[3] Cobalt(II) is stable in awueous soln but in presence of complexing reagents,it is completely oxidised.why?? thread closed ...

Q1. The image of the plane x-y+z+6=0 with respect to the plane mirror 4x-2y-6z+14=0 is ax+by+cz+6=0, then the value of cos-1a + cos-1b+ cos-1c is ...

1. If an electrolytic solution is diluted to 9 times then its conductance a) Inc. 9 times b) Dec. 9 times c) Remains same d) none 2. 4 M + 8 CN^– + 2H2O + O2 → 4 [M(CN)2 + 4OH– the metal M is (A) Ag (B) Fe (C) Cu (D) Zn ...

Single Option Correct. 1) Electron Affinity is +ve when- A) O- is formed from O. B) O 2- is formed from O-. C) O+ is formed from O. D) Electron Affinity is always negative. 2)Of the 4 ∂H values needed to calculate the latti ...