Important Paper B. Pharma

1. If a stone is dropped into a lake from the top of a tower, the should of the splash is heard by a man on the tower after 11.5 seconds. The height of the tower is :
(a) 1000 m                    
(b) 750 m
(c) 500 m                     
(d) 250 m
Ans. (c)
2. The average value of which of the following quantities is zero for the molecule of an ideal gas in equilibrium:
(a) Kinetic energy         
(b) Momentum
(c) Density                   
(d) Speed
Ans. (a)
3. If three moles of an ideal gas are compressed to half the initial volume at a constant temperature of 300 k, the amount of work done is:
(a) -5188 J                    
(b) 5000 J
(c) 5188 J                     
(d) -5000 J
Ans. (a)
4. A telescope consists of two lenses of focal length 10 cm and 1 cm. Calculate the length of the telescope, when an object is kept at a distance of 60 cm from the objective then the final image is formed art least distance of distinct vision:
(a) 15.05 cm                 
(b) 12.96 cm
(c) 13.63 cm                 
(d) 14.44 cm
Ans. (b)
5. The centre of mass of a system cannot change its state of motion, unless there is an external force acting on it. Yet the internal force of the brakes can bring a car to rest, Then:
(a) the brakes stop the vehicle
(b) the friction between brake pads and the wheel stops the car
(c) the car is stopped by the road
(d) the car is stopped by the driver pressing the pedal
Ans. (c)
6. If the momentum of a body remains constant, then the mass-speed graph of the body is a:
(a) circle
(b) straight line
(c) rectangular hyperbola
(d) parabola
Ans. (c)
7. A car is moving ina circular horizontal track of radius 10 m with a constant speed of 10 m/s. A plumb line is suspended from the roof of the car by a light rigid rod of length 1 m. The angle made by the rod with the track is:
(a) zero                        
(b) 30
(c) 45                           
(d) 60
Ans. (c)
8. If a compressed string is dissolved in acid :
(a) the energy of the string increases
(b) the energy of  the acid decreases
(c) the kinetic energy and potential energy of the acid molecules increases
(d) the temperature of the acid increases
Ans. (c)
9. The vitamin which is neither soluble in water nor in fat is :
(a) Phylloquinone         
(b) Biotin
(c) Thiamine                 
(d) Ergocalciferol
Ans. (b)
10.. Violet colour is obtain when dilute CuSO4 is added in an alkaline solution of protein. The test is known as:
(a) Biuret test               
(b) Xanthoproteic test
(c) Million’s test            
(d) Ninhydrin test
Ans. (a)
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