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8. P-V plots for two gases during adiabatic process are shown in the figure. Plots 1 and 2 should correspond respectively to

(a)      He and O2 (b) O2 and He (c)   He and Ar (d) O2  and N2 Answer-b (141)

9. An ideal gas expands isothermally from a

(a)     P3 > P1 , W > 0            (b)  P3 < P1 , W...

Q. In a March Past, seven persons are standing in a row. Q is standing left to R but right to P. 0 is standing right to N and left to P. Similarly, S is standing right to R and left to T. Find out who is standing in the middle. ਮਾਰਚ ਪਾਸਟ ਵਿੱਚ , 7 ਵਿਅਕਤੀ ਇਕ ਲਾਈਨ ਵਿਚ ਖੜ੍ਹੇ ਹੁੰਦੇ ਹਨ Q,R ਦੇ ਖੱਬੇ ਪਾਸੇ ਅਤੇ P. ਦੇ ਸੱਜੇ ਪਾਸੇ ਖੜ੍ਹਾ ਹੈ। 0,N ਦੇ ਸੱਜੇ ਪਾਸੇ ਅਤੇ P ਦੇ ਖੱਬੇ ਪਾਸੇ ਖੜ੍ਹਾ ਹੈ। ਇਸ ਪ੍ਰਕਾਰ, S,R ਦੇ ਸੱਜੇ ਪਾਸੇ ਅਤੇ T ਤੋਂ  ਖੱਬੇ ਪਾਸੇ ਖੜ੍ਹਾ ਹੈ। ਪਤਾ ਕਰੋ ਕਿ ਵਿਚਕਾਰ ਕੌਣ ਖੜ੍ਹਾ ਹੈ। मार्च पास्ट में, सात व्यक्ति एक पंक्ति में खड़े होते हैं। Q, R से बाएं खड़ा है लेकिन P के दाएं खड़ा है 0,N के दाएं  और P से बाएं खड़ा है। इसी तरह, S, R के दाईं ओर खड़ा है और T से बाएं है। पता लगाएं कि कौन बीच में खड़ा है। (a)P                         (b) Q                       (c)R        (d) O ANSWER- B

Q. In a March Past, seven persons are standing in a row. Q is standing left to R but right...

13. The temperature of sink of Carnot engine is 27°C. Efficiency of engine is 25%. Then temperature of source is

(a)  227°C                                        (b) 327°C (c) 127°C                             ...

46. Two gases are at absolute temperatures 300 K and 350 K respectively. Ratio of average kinetic energy of their molecules is

(a) 7 : 6                           (b) 6 : 7...

51. For a gas at a temperature the root-mean-square velocity

Vrms the most probable speed Vmp and the average speed Vav  obey the relationship (a)  Vav  >Vrms   >  Vmp ...

65. A gas at 27°C has a volume V and pressure P. On heating its pressure is doubled and volume becomes three times. The resulting temperature of the gas will be

(a)   1800°C                                   (b)   162°C (c)   1527°C                                   (d)   600°C Answer-c (91)

3. Every gas (real gas) behaves as an ideal gas

(a)   At high temperature and low pressure (b)   At low temperature and high pressure (c)   At normal temperature and pressure...

6. Molecules of a gas behave like

(a)  Inelastic rigid sphere (b)   Perfectly elastic non-rigid sphere (c)   Perfectly elastic rigid sphere (d)   Inelastic non-rigid sphere Answer-c (46)

3. A wooden block, with a coin placed on its top, floats in water as shown in fig. the distance l and h are shown there. After some time the coin falls into the water. Then

(a) l decreases and h increases (b)  l increases and h decreases (c)   Both l and h increase (d)  Both...

2. A small spherical solid ball is dropped from a great height in a viscous liquid. Its journey in the liquid is best described in the diagram given below by the

(a)   Curve A (b)  Curve B (c)   Curve C (d)  Curve D Answer-b (49)

58. A viscous fluid is flowing through a cylindrical tube. The velocity distribution of the fluid is best represented by the diagram

Answer-c (338)

41. An L-shaped glass tube is just immersed in flowing water such that its opening is pointing against flowing water. If the speed of water current is v, then

(a)   The water in the tube rises to height v2 /2g (b)  The water in the tube rises to height ...

36. In this figure, an ideal liquid flows through the tube, which is of uniform cross-section. The liquid has velocities

vA and vB , and pressure PA and PB at points A and B respectively (a) vA = vB (b)...

6. Work done in splitting a drop of water of 1 mm radius

into 106 droplets is (Surface tension of water= 72 x 10-3 J/m2 (a) 9.58 x 10-5 j (b) 8.95 x...

15. A closed rectangular tank is completely filled with water and is accelerated horizontally with an acceleration a towards right. Pressure is (i) maximum at, and (ii) minimum at

(a)  (i) B (ii) D (b)   (i) C (ii) D (c)   (i) B (ii) C (d)   (i) B (ii) A...

35. If water rises in a capillary tube upto 3 cm. What is

the diameter of capillary tube (Surface tension of water = 7.2 ×10–2 N/m)  (a)  9.6×10–4 m (b)  9.6×10–3 m (c) ...

4. When there is no external force, the shape of a liquid drop is determined by

(a)  Surface tension of the liquid (b)  Density of liquid (c)   Viscosity of liquid (d)  Temperature of air only Ans....

4. When there is no external force, the shape of a liquid drop is determined by

(a)  Surface tension of the liquid (b)  Density of liquid (c)   Viscosity of liquid (d)  Temperature of air only Ans....

35. The position of a particle is given by

The position of a particle is given by : →r = (^i+2^j-^k) and momentum →p =(3^i+4^j-2^k)  . The angular momentum...

Glycerol is added to soap. It functions ….

a. As a filler b. To increases leathering c. To prevent rapid drying d. To make soap granules Ans. c...

SOLAR SYSTEM GEOGRAPHY TEST

Loading… (95)

A pair of insectivorous plants is

(a)  Drosera and Rafflesia (b)  Nepenthes and bladder wart (c)   Dionaea and Viscum (d)  Venus fly trap and Rafflesia Answer:...

A body of mass m is taken from earth surface to the height h equal to radius of earth, the increase in potential energy will be

(a)      mgR                                    (b) ...

49. A flywheel of moment of inertia

A flywheel of moment of inertia 0.32 kg–m2 is rotated steadily 120 rad/s at by a 50 w electric motor....

103. A metal bar of length L and area of cross-section A is clamped between two rigid supports. For the material of the rod, its Young’s modulus is Y and coefficient of linear expansion is . If the temperature of the rod is increased by

A metal bar of length L and area of cross-section A is clamped between two rigid supports. For the material...

The escape velocity from earth is

The escape velocity from earth is ves.  A body is projected with velocity 2 ves with what constant velocity will it...

30. Increase in length of a wire is 1 mm when suspended by a weight. If the same weight is suspended on a wire of double its length and double its radius, the increase in length will

30. Increase in length of a wire is 1 mm when suspended by a weight. If the same weight is...

25. The spring balance does not read properly after its long use, because   

25. The spring balance does not read properly after its long use, because (a)  The elasticity of spring increases (b) ...

21. The Young’s modulus of a rubber string 8 cm long and density

The Young’s modulus of a rubber string 8 cm long and density 1.5 kg/m3  is 5×108 N/m2 , is suspended on...

A ball is dropped from a spacecraft revolving around the earth at a height of 120 km. What will happen to the ball

(a)      It will continue to move with velocity v along the original orbit of spacecraft (b)  It will move with...

A geostationary satellite is revolving around the earth. To make it escape from gravitational field of earth, is velocity must be increased

(a)      100%                                        (b)  41.4% (c)   50%                             ...

Sexual reproduction in Spirogyra is morphologically characterised by

(a)  Oogamy (b)  Anisogamy (c)   Isogamy (d)  Isogamy and oogamy both Ans. c (8)

14. Five particles of mass = 2 kg are attached to the rim of a circular disc of radius 0.1 m and negligible mass. Moment of inertia of the system about the axis passing through the centre of the disc and perpendicular to its plane is

(a)   1 kg m2 (b)  0.1 kg m2 (c)   2 kg m2 (d)  0.2 kg m2 Ans. b (12)

Consider a satellite going round the earth in an orbit. Which of the following statements is wrong

(a)      It is a freely falling body (b)  It suffers no acceleration (c)   It is moving with a constant speed...

82. In which case there is maximum extension in the wire, if same force is applied on each wire

(a)  L = 500 cm, d = 0.05 mm (b)   L = 200 cm, d = 0.02 mm (c)   L...

128. A solid cylinder of radius R and mass M, rolls down on inclined plane without slipping and reaches the bottom with a speed v. The speed would be less than v if we use

(a)   A cylinder of same mass but of smaller radius (b)  A cylinder of same mass but of larger radius...

A body of mass m kg. starts falling from a point  2R above the Earth’s surface. Its kinetic energy when it has fallen to a point ‘R’ above the Earth’s surface [R-Radius of Earth, M-Mass of Earth, G-Gravitational Constant]           

(a)   1/4 (GMm /R)                (b) 1/6 ( (GMm /R) (c)    2/3 (GMm...

Silcones are a group of organosilicon polymers containing

a. Si – O – Si linkage b. O – Si – O linkage c. Si – C – linkage...
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