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Class XI Revision Quiz Week 2 Day 1

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Question 1

Equal force F (> mg) is applied to string in all the three cases. Starting from rest, the point of application of force moves a distance of 2 m down in all cases. In which case the block has maximum kinetic energy?

Question 2

The diagrams represent the potential energy U of a function of the inter-atomic distance r. Which diagram corresponds to stable molecules found in nature.

Question 3

An open knife edge of mass 'm' is dropped from a height 'h' on a wooden floor. If the blade penetrates upto the depth 'd' into the wood, the average resistance offered by the wood to the knife edge is

Question 4

An object of mass 40 kg and having velocity 4 m/s collides with another object of mass 60 kg, having velocity 2 m/s in the same direction. The loss of energy when the collision is perfectly inelastic is

Question 5

The potential energy function for a force field  is given by U(x, y, z) = sin(x + y + z). The force acting on a particle at position given by co-ordinate (0, 0, /4) is–

Question 6

A is a pure solvent, B is non-volatile solute. If B is added to A then mixture is termed as AB. Vapor pressure(V) of them are related as

Question 7

Raoults law states that

Question 8

n-hexane and n- heptane forms a binary solution. Which statement is true in this case.

Question 9

A is water; B (molar mass= 97.8 g/mol) is a non-volatile compound which when added to 200 g of water produces solution of vapor pressure of 21 torr. Find amount of B required to produce solution of vapor pressure 21 torr.
The vapor pressure of water at this temperature is 42.362 torr. B do not ionize in A

Question 10

A solution is obtained of density 1.15 g/mL when 80 g of urea (mol. wt. 60) is mixed in 1200 g of the molarity of the solution is

Question 11

The general solution of

Question 12

If sin x + sin y = Description: E:\KCET-1-Feb\KARNATAKA-PAPER-2015_files\image300.png and cos x + cos y = 1, then tan (x + y) = ________

Question 13

If sin x + sin y = 3(cos y – cos x), then the value of is

Question 14

In a triangle Description: E:\WBJEE\WBJEE-2010_Mathematics_files\image102.png. If tanDescription: E:\WBJEE\WBJEE-2010_Mathematics_files\image103.png and tanDescription: E:\WBJEE\WBJEE-2010_Mathematics_files\image104.png are roots of ax2 + bx + c = 0, where a Description: E:\WBJEE\WBJEE-2010_Mathematics_files\image105.png0, then which one is true ?

Question 15

If sin 2x = 4cosx, then x =
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Mar 4JEE & BITSAT