List of practice Questions

A particle moves according to the law x=r cos \(\frac{π}{2}\) The distance covered by it in the time interval between t=0 and t=3s is.
The rms speed of oxygen at room temperature is about 500 m/s. The rms speed of hydrogen at the same temperature is about
The distance between two points differing in phase by 60° on a wave having a wave velocity 360 m/s and frequency 500 Hz is
In each heart beat, a heart pumps 80 ml of blood at an average pressure of 100 mm of Hg. Assuming 60 heart beats per second, the power output of the heart is (PHg=13.6x103 kgm-3) (g = 9.8 ms-2)
Two liquids A and B are at 32°C and 24°C. When mixed in equal masses the temperature of mixture is found to be 28°C. Their specific heats are in the ratio
If pressure and temperature of an ideal gas are doubled and volume is halved, the number of molecules of gas
A curved road of diameter 1.8 km3 is banked so that no friction is required at a speed of 30 m/s. What is the banking angle ?
The length of a metal wire is l1, when the tension in it is T1, and is l2 when the tension is T2. The natural length of wire is
The co-efficient of friction between two surfaces is μ=0.8. The tension in the string as shown in the figure is
The tension in the string
A body of density p and volume V is lifted through height h in a liquid of density \(σ (< p)\). The increase in potential energy of the body is
A tunnel is dug along the diameter of the earth. A mass m is dropped into it. How much time does it take to cross the earth?
A body moves along a straight line with acceleration 3 ms-2 for 2 seconds and then with acceleration 4 ms-2 for 3 seconds. What is his average acceleration ?
Two bodies are projected at angles e and (90°-θ) to the horizontal with the same speed. The ratio of their times of flight is
The dimensional formula for permittivity of free space (80) in the equation F=\(\frac{1}{4\pi{e_0}}\)\(\frac{q_1q_2}{r^2}\) where, symbols have their usual meaning is
Identify the correct statement.
Identify the monomers from the following.
Hydrolysis of cyanohydrin derivative produces
Which of the following do not contain carbon-oxygen double bonds?
Chloroethane reacts with X to give diethyl ether. The compound X is
How do you distinguish chlorobenzene A C from benzyl chloride ?
The standard emf of galvanic cell involving 3 moles of electrons in its redox reaction is 0.59 V. The equilibrium constant for the reaction of the cell is
The potential of a hydrogen electrode at pH=10 is
Which of the following electrolytic solutions has the least specific conductance?
Dissolving 120 g of urea in 1000 g of water gave a solution of density 1.15g/mL. The molarity of the solution is
A 5.2 molal aqueous solution of methyl alcohol, CH3OH is supplied. What is the mole fraction of methyl alcohol in the solution?