Chemistry-
General
Easy
Question
Coal is an impure form of carbon in which percentage of carbon varies from _____ to _____
- 50% to 60%
- 28% to 98%
- 70% to 100%
- 100%
The correct answer is: 28% to 98%
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In Rutherford’s atomic model, the electrostatic force of attraction between the positively and negatively charged particles is counter balanced by
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Two coils have a mutual inductance 0.005 H The current changes in the first coil According to equation I =I0 sin 
where I0 = 10A and 
= 100 
radian / second The maximum value of e.m. fin the second coil is
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Physics-General
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Which of the following relations is correct?
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Physics-General
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What is the ratio of the charges of two conducting spheres of radii r1 & r2 which have equal surface charge density ?
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A non–uniform rope of length l hangs from a ceiling. Mass per unit length of rope (m) changes as m = m0 e y , where y is the distance along the string from its lowest point. Then graph between square of velocity of wave and y will be best represented as :
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Physics-General
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A thin horizontal movable plate P is separated from two fixed horizontal plates P1 and P2 by two highly viscous liquids of coefficient of viscosity h1 and h2 as shown, where h2 = 4h1 . Area of contact of movable plate with each fluid is same. If the distance between two fixed plates is h, then the distance h1 of movable plate from upper fixed plate such that the movable plate can be moved with a constant velocity by applying a minimum constant horizontal force F on movable plate is (assume velocity gradient to be uniform in each liquid).
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Physics-General
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In a cylinder-piston arrangement, air is under a pressure P1. A soap bubble of radius r lies inside the cylinder, soap bubble has surface tension T. The radius of soap bubble is to be reduced to half, The new pressure P2 to which air should be compressed isothermally. (Assume r is very small as compared to height of cylinder)
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Which of the following is an equivalence relation ?
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If R = {(x,y): x, yÎN, y is the remainder when x is divided by 7}.Then sum of all numbers in range of R
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Maths-General
Maths-
Let 
and 
then R is
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Maths-General
Maths-
Let 
and 
then the relation R on A is
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Maths-General
Maths-
Let Y = { 1,2,3,4,5}, A = {1,2}, B ={3,4,5} and 
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Maths-General
