General Questions and Answers

14 A car travels a distance d on a straight road in two hours and then retums to the starting point in next three hours Its average speed is 2 5 4 none of these a PF d d PIN 3 D 3 2 3

The total number of moles in a closed beaker containing approx 58 5 g of NaCl 602 2 x 1020 molecules of O2 2 g of hydrogen gas 22 4 litres of SO2 gas at NTP 30 ltr of Cl at 0 0821 atm and 27 C Assuming no reaction taking place R 0 0821 Latm K 1 mol 1

KN0021 22 Select the incorrect statements from the following S1 Average velocity is path length divided by time interval S2 In general average speed is greater than the magnitude of the average velocity S3 A particle moving in a given direction with a non zero velocity can have zero speed S4 The magnitude of average velocity is the average speed 1 S2 and 53 2 S1 and 4 3 S1 S3 and 54 4 All four statem nts

A hydrocarbon compound on combustion gives 6 6g of CO and 2 7g of H O and no other products a obtained If 11 35L of gas has mass 14g at STP then find the molecular formula of the gas by calcula in fourth orbit it of hydrogen atom and calcul

134 Pre Medical Physics ACCELERATION APPLICATION AVERAGE ACCELERATION OF CALCULUS 23 If x denotes displacement in time t and x a cost then acceleration is 1 a cost 3 a sin t 2 a cost 4 a sin t 30 T t f

The main scale of a vernier callipers has n divisions cm n divisions of the vernier scale coincide with n 1 divisions of main scale The least count of the vernier callipers is 1 a n 1 n 1 c 1 n cm cm b d 1 n cm 1 n n 1 cm

ALLEN 12 The magnitude of average velocity is equal to t average speed when a particle moves 1 on a curved path 2 in the same direction 3 with constant acceleration

A sealed tube which can withstand a pressure of 3 atm is filled with air at 27 C and 760 mm pressure The temperature above which it will burst A B C D 245 627 756 402 X

111 You are provided two aqueous solutions A 500 mL of 5 M and B 500 mL of 2M of NaOH If solutions of A and B are to be used in appropriate amount to prepare maximum volume V mL of 3M solution of NaOH what is the value of V a 500 mL b 1000 mL c 800 mL d 750 mL

Given the value of the three densities below determine which would float on water Solid 16 g has a volume of 15 9 mL Liquid 2 density of 859 kg m Solid 3 23 7 g with a volume of 0 237 mL Essay answers are limited to about 500 words 3800 characters maximum including space 3800 Character s remaini

plain your answer 10 The electronic configuration of two elements X and Y are given below 3p element X of atomic number 18 or element Z X e 8p 8n where p proton n neutron e electron When these two elements combine together to forma ompound give the mass in grams of one mole of this compound Y

A direct current deposits 54g of silver atomic mass 108 during the electrolysis The same quantity of electricity would deposit aluminium Atomic mass 27 from aluminium chloride in molten state equal to 54 27 g 4 5 g

An athlete completes one round of a circular track of radius R in 20 seconds What will be his displacement at the end of 2 minutes 20 seconds 1 Zero 2 2R 3 2R 4 7mR

16 A car moving on a straight road covers one third of a certain distance with 20 km h and the rest with 60km h The average speed is 1 40 km h 2 80 km h 4 36 km h 2 3 46 km h

Question No 54 Single Correct A In the balanced equation 5BiO3 XH Y Mn2 5Bi 7H O 2MnO4 X Y is A 10 A 12

You are given an unknown liquid that has a density of 0 87 g mL It s volume is 34 51 ml What is the mass of the unknown liquid DA 74 12 A CE Units

A gaseous mixture of propane and butane of volume 3 litre on complete combustion produces 11 0 litre CO under standard conditions of temperature and pressure The ratio of volume of butane to propane is a 1 2 b 2 1 c 3 2 d 3 1 2 03

KNO014 15 A train covers the first half of the distance between two stations with a speed of 40 km h and the other half with 60 km h Then its average speec is 1 50 km h 3 52 km h 2 48 km h 4 100 km h essi KNOO15

A equilibrium is set up for the chemical reaction N O4 g 2NO g vapour density d of the gaseous mixture was measured If D is the theoretical value of vapour density variation of a with D d is given by the graph What is value D d at point A O O O 0 5 01 O 1 5 A D d

4 with constant retardation KN0012 13 Abody covers one third of the distance with a velocity v the second one third of the distance with a velocity V and the last one third of the distance with a velocity V3 The average velocity is V V V 2 3 V V V Vg 3 V V 2 4 3v v V V V V V V3V V V V 3 19 20

When solving a problem it is important to identify your given and needed units but it is also important to understand the relationship between those units so you will know how to set up your equation in order to solve the problem Review the data sets below and use the steps of the problem solving method to determine whether the given measurements would be appropriate for calculating ma volume or density Drag the appropriate data sets to their respective bins View Available Hint s 18 0 mL of cooking oil density of cooking oil 0 92 g mL 32 cm sample of gold density of gold 19 3 g cm 5 00 cm of table salt weighs 10 8 g 150 g of iron density of iron 79 0 g cm 43 2 g of table salt occupies 20 0 cm of space Appropriate for calculating volume Reset Help 3 00 g of white pine density of white pine 0 40 g cm Appropriate for calculating density

The initial state state 1 of a system containing 2 kg of water is 110 C and 0 4 m volume The water is now heated to state 2 through the path shown at which the final pressure is 500 kpa and temperature of 300 C Find the work and heat transfer in this process T T2 T1 P 2 V

3 To remove myopia short sightedness a lens of power 0 66D is required The distant point of the eye is approximately 1 100 cm 3 50 cm 2 151 5 cm 4 25 cm

GO0080 and Red colour of 56 1 64 1 62 of lens is 10cm en the colour of 25 m 87 GO0086 Least distance of distinct vision is 25 cm What will be Magnifying power of simple microscope of focal length 5 cm if final image is formed at minimum distance of distinct vision 1 2 5 3 911 4 6 20087

Pre Medical Physics 133 18 The numerical ratio of displacement to the distance covered is always 1 less than one 2 equal to one 3 equal to or less than one

0 AGE wards west 6 Build Up Your Understanding The location of a particle is changed What can we say about the displacement and distance covered by the particle 1 Both cannot be zero 2 One of the two may be zero 3 Both must be zero 4 If one is positive the other is negative and vice versa KN0006

5 92 An astronomical telescope has a magnifying power 10 The focal length of eyepiece is 20 cm The focal length of objective is 1 2 cm 2 200cm 3 cm 4 cm 200 600092

10 mL of 1 N HCI is mixed with 20 mL of 1 M H SO and 30 mL of 1 M NaOH The resultant soluti has 1 20 meq of H ions 3 0 meq of H or OH 2 20 meq of OH 4 30 milli moles of H 25N 106

35 An astronomical telescope has focal lengths 100 10cm of objective and eyepiece lens respectively when final image is formed at least distance of distinct vision magnification power of telescope will 92 An be 10 1 10 foca 2 11 3 14 dist 1 4 15

If a capillary of radius r is dipped in water the height of water that rises in it is h and its mass is M If the radius of the capillary is doubled the mass of water that rises in the capillary will be 1 4M 2 2M M 3 M 4

The vapour pressure of a solution containing 1 mole A and 2 mole B is 550 torr When 1 mole A and 1 mole B are furthe added to this solution the vapour pressure increases by 10 torr The vapour pressures of A and B in pure states are B D 500 torr 650 torr 650 torr 500 torr 500 torr 500 torr 400 torr 250 torr

3 Speed of 2 cm radius ball in a viscous liquid is 20 cm s Then the speed of 1 cm radius ball in the same liquid is 1 5 cm s 3 40 cm s 2 10 cm s 4 80 cm s

2 The excess pressure inside an air bubble of radius r just below the surface of water is p The excess pressure inside a drop of the same radius just outside the surface is p If T is surface tension then 1 p 2p 2 P P 3 p 2p 4 p 0 p 0 FL0072

3 02 cm 4 0 cm 2 52 MICROSCOPES AND TELESCOPES 82 The focal length of convex lens is 2 5 cm Its magnifying power for minimum distance of distinct vision will be 1 25 GO0081 3 11 4 1 1 88 In im 1 2 3 4 89 TI

70 A plano convex lens is made of refractive index 75 1 6 The radius of curvature of the curved surface is 60 cm The focal length of the lens is 1 50 cm 2 100 cm 3 200 cm 4 400 cm F r

In H sample e is present in the orbit in which angular momentum of e is 2h Electron make transition upto ground state If 3rd highest energy photon has energy of X eV then approximate numerical value of is

In a laboratory four convex lenses L L L and L of focal lengths 2 4 6 and 8 cm respectively are available Two of these lenses form a telescope of length 10 cm and magnifying power 4 The objective and eye lenses are 1 L L 2 L L 3 L L 4 L L

X Number of elements given in the list below which are present in coal Y Number of elements given in the list below which are not present in coal List Carbon Iron Nitrogen Sodium Sulphur Chlorine The value of X Y is

2 084 00 tively ce of be will 91 The magnifying power of a simple microscope is 6 The focal length of its lens in metres will be if least distance of distinct vision is 25 cm 1 0 05 2 0 06 3 0 25 4 0 12 GO0091

3 An astronomical telescope of magnifying power is made using two lenses spaced 45 cm apart Th focal length of the lenses used are 1 f 40 cm f 5 cm 2 f 8 cm f 5 cm 3 f 5 cm f 47 cm 4 f 20 cm f5 cm

5 An aeroplane of mass 3 x 10 kg and total wing area of 120 m is in a level flight at some height The difference in pressure between the upper and lower surfaces of its wings in kilopascals is g 10m s 1 2 5 3 10 0 4 12 5 2 5 0

0 A tank of height 5 m is full of water There is a hole of cross sectional area 1 cm in its bottom The initial volume of water that will come out from this hole per second is

A Which is not a method to prepare H O B Oxidation of 2 ethyl Anthraquinol H S O7 k Complete Hydrolysis BaO 8H 0 H H O F

ALLEN 68 The focal length of a convex lens is 10 cm and its refractive index is 1 5 If the radius of curvature of one surface is 7 5 cm the radius of curvature of the second surface will be

71 If in a plano convex lens the radius of curvature of the convex surface is 10 cm and the focal length of the lens is 30 cm then the refractive index of the material of lens will be 1 1 5 2 1 66 3 1 33 4 3 CH 76

10 w v aqueous solution of certain substance is isotonic with 5 w v aqueous solution of fructose C6H1206 molecular mass of the substance is A B 90 360 180 540

3 An incompressible fluid flows steadily through cylindrical pipe which has radius 2 R at point A an radius Rat point B farther along the flow direction If the velocity at point A is v its velocity at poin is 201 1 2v 2 v 3 IC 4 4v

3 80 4 160 GO0058 5D are combined to An object is placed at a this lens Calculate the 2 10 cm 4 25 cm 6000ro 66 A convex lens of power P is immersed in water how will its power change 1 Increases 2 Decreases 3 Remains unchanged 4 Increases for red colour and decreases for blue colour G00066

GO0059 s in contact 67 A convex lens is made up of three The power different materials as shown in the figure For a point object placed on its axis the number of images formed are 1 1 2 3 GO0060 3 4 GO0066 4 5

5 Atomicity of dimeric phosphorous pentoxide is x and the number of shared electron pairs is y Then a y x 6 b 2x y 8 c 10x 7y 0 1 Only a is correct 2 Only b is correct 3 Only c is correct 4 All the above are correct P