Chemistry-
General
Easy
Question
Methanol cannot be dried with anhydrous 
because
- dissolves in it
- It is not good dehydrating agent
- It forms a solid
- It reacts with
dissolves in itThe correct answer is: It forms a solid
Methanol cannot dried with anhydrous 
because it forms a solid 
(addition compound).
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A block of mass m is being pulled up the rough incline by an agent delivering constant power P. The coefficient of friction between the block and the incline is 
. The maximum speed of the block during the course of ascent is
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physics-General
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Two identical blocks A and B are placed on two inclined planes as shown in diagram. Neglect air resistance and other friction
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Statements III : Work done by external agent to move block slowly from position B to O is negative
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An infinitely long straight conductor 
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and 
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Two identical bar magnets are fixed with their centres at a distance d apart. A stationary charge 
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Consider a disc rotating in the horizontal plane with a constant angular speed w about its centre O. The disc has a shaded region on one side of the diameter and an unshaded region on the other side as shown in the figure. When the disc is in the orientation as shown, two pebbles P and Q are simultaneously projected at an angle towards R. The velocity of projection is in the y-z plane and is same for both pebbles with respect to the disc. Assume that (i) they land back on the disc before the disc has completed 1/8 rotation, (ii) their range is less than half the disc radius, and (iii) w remains constant throughout. Then
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A ball of mass (m) 0.5 kg is attached to the end of a string having length (L) 0.5 m. The ball is rotated on a horizontal circular path about vertical axis. The maximum tension that the string can bear is 324 N. The maximum possible value of angular velocity of ball (in radian/s) is
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physics-General
