GameChanger Academy

Mechanics

1. Units, Dimensions and Errors

2. Vectors and Scalars

3. Motion in a Straight Line

4. Projectile Motion

5. Newton's Laws of Motion

6. Friction

7. Work, Energy, Power and Collision

8. Circular motion

9. Rotational motion

10. Simple Harmonic Motion

11. Gravitation

12. Elasticity

13. Surface Tension

14. Fluid dynamics and Viscosity

15. Hydrostatics

Heat and Thermodynamics

16. Thermometry

17. Thermal expansion

18. Calorimetry, Change of State and Hygrometry

19. Gas Laws and Kinetic theory of Gases

20. Transmission of Heat

21. Thermodynamics

Sound and Waves

22. Wave

23. Superposition of Waves

24. Stationary/ Standing waves

25. Doppler's effect and Musical sound

Optics

26. Reflection of Plane and Curved Mirrors

27. Refraction at Plane surfaces and Total internal reflection

28. Refraction through prism and Dispersion of Light

29. Refraction through Lenses

30. Chromatic abberation in Lenses, Optical instruments and Human eye

31. Velocity of Light

32. Photometry

33. Wave nature of Light

Electrostatics

34. Charge and Force

35. Electric Field and Potential

36. Capacitance

Electrodynamics

37. Electric current

38. Heating Effect of Current

39. Thermoelectricity

40. Chemical effect of Current

41. Meters

Electromagnetism

42. Properties of Magnets

43. Magnetic effects of Current

44. Electromagnetic induction

45. Alternating current

Modern Physics

46. Cathode rays, Positive rays and Electrons

47. Photoelectric effect

48. X-rays

49. Atomic structure and Spectrum

50. Radioactivity

51. Nuclear physics

52. Semiconductor and Semiconductor devices

53. Diode and Triode valves

54. Logic gates

55. Relativity and Universe

56. Particle physics

Heat and Thermodynamics

18. Calorimetry, Change of State and Hygrometry

1. Heat required to convert 1 gm of ice at 0°C to steam at 100°C;

[BP 2012]

0.1 k cal
1000 cal
716 cal
750 cal

2. Water is used as coolant due to:

[BP 2011]

Low specific heat
High specific heat
Universal solvent
Anomalous expansion

3. As compared to a person with white skin, another person with dark skin will experience

[BP 2011]

Less heat and more cold
More heat and more cold
More heat and less cold
Less heat and less cold

4. When ice cube is placed on a table and melts, which is correct?

[IOM 2012]

The K.E of ice molecules decreases
The P.E of ice molecules decreases
The P.E of ice molecules increases
The energy of ice molecules doesn't change

5. A body of mass 100 gm was given a heat of 420 J. Find the raise in temperature? (specific heat capacity = 420 J/kg·K)

[MOE 2010]

1°C
1 K
10°C
10 K

6. A 10 kg iron bar (specific heat 0.11 cal/gm°C) at 80°C is placed on ice (L_f=80 cal/gm). How much ice melts?

[MOE 2010]

1.1 kg
10 kg
16 kg
60 kg

7. Amount of heat required to change 2 kg water from 20°C to 40°C.

[MOE 2011]

168 KJ
120 KJ
200 KJ
250 KJ

8. When relative humidity is 100%, the room temperature is equal to:

[MOE 2011-2013]

40°C
0°C
Dew point
100°C

9. Final temperature when mixing 0.5 kg ice at 0°C with 0.5 kg water at 75°C:

[MOE 2011]

5°C
10°C
15°C
0°C

10. Temperature at which water vapor in atmosphere is saturated:

[IOM]

Critical temperature
Dew point
Both
None

11. The door of a running refrigerator is opened. Which is true?

[IE 2011]

Temperature of the room will increase gradually
Temperature of the room will decrease
Temperature will increase to that of refrigerator
None

12. Steam at 100°C is poured into 1.1kg water at 15°C (calorimeter water equivalent=0.02kg). Mass of steam condensed if final temp=80°C?

[IE 2012]

0.130 g
0.243 g
0.340 g
0.135 g

13. Three liquids A(10°C), B(25°C), C(40°C). When A+B mix, temp=15°C; B+C mix, temp=30°C. What is A+C mixture temp?

[IE 2013]

12°C
16°C
8°C
40°C

14. Heat required to convert 1gm ice at -10°C to steam at 100°C?

[KU 2010]

766 cal
676 cal
736 cal
540 cal

15. Liquids with volume ratio 1:1, density ratio 1:3, specific heat ratio 3:1. Their heat capacity ratio?

[MOE 2013]

16. Substance that expands on both heating and cooling:

[BP 2012]

Water at 0°C
Water at 40°C
Ice at 0°C
Semiconductor

17. 5kg mass needs 80J heat for 10K rise. Specific heat capacity in Jkg^-1K^-1?

[IOM 2014]

18. Density of ice is:

[KU 2010]

More than water
Less than water
Equal to water
3 times water

19. When relative humidity=100% at 30°C, dew point is:

[BP 2014]

0°C
30°C
70°C
100°C

20. 50gm ice at 0°C + 50gm water at 80°C. Final temperature?

[MOE 2009]

40°C
50°C
0°C
80°C

21. 10kg iron bar (c=0.11 cal/gm°C) at 80°C placed on ice (L_f=80 cal/gm). Ice melted?

[MOE 2010]

1.1 kg
10 kg
16 kg
60 kg

22. Heat to convert 1gm ice at -100°C to steam at 100°C?

[OM 2001]

766 cal
696 cal
716 cal
736 cal

23. 10gm ice at -10°C → steam at 100°C. Heat required?

[MOE 2006]

725 cal
7250 cal
350 cal
300 cal

24. Melting point of ice:

[MOE 2005]

Decreases with pressure decrease
Increases with pressure increase
Independent of pressure
Decreases with pressure increase

25. Heat to convert 1gm ice at 0°C → steam at 100°C?

[MOE 2003]

100 cal
0.01 kcal
716 cal
1 kcal

26. Heat required to melt 1gm ice without temp change:

[MOE 2002]

80 cal
80 kcal
740 cal
740 kcal

27. Energy to change 1kg ice from -10°C to 50°C (c_ice=0.5 cal/gm°C, L_f=80 cal/gm)?

[MOE 2006]

155 kcal
135 kcal
120 kcal
180 kcal

28. When ice melts:

[MOE]

Absorbs heat from surroundings
Gives heat to surroundings
No relation to surroundings
Heat may be given/absorbed

29. When liquid changes to vapor, increasing pressure causes boiling point to:

[MOE]

Increase
Decrease
Cannot be predicted
May increase/decrease

30. When two ice blocks are pressed together, they join because:

Heat production
Increase in specific gravity
Decrease in melting point due to pressure
Increase in melting point due to pressure

31. Steam at 100°C passed into 1.1kg water + 0.02kg calorimeter at 15°C → 80°C. Mass of steam condensed?

[TE-2007]

0.1 kg
0.65 kg
0.26 kg
0.135 kg

32. 1gm ice at 0°C + 1gm steam at 100°C mixed. Resulting temp?

0°C
23°C
50°C
100°C

33. 25g water at 46°C + 10g ice at 0°C. Resulting temp?

0°C
8°C
10°C
15°C

34. 20g ice at 0°C + 20g water at 60°C. Final water mass?

35. Equal masses: ice at -10°C + water at 60°C. How much ice melts?

1/6
1/2
1/4
Whole melts

36. Specific heats C₁ (cal/gm°C) and C₂ (cal/gm°F). Valid relation?

C₁ = C₂
C₁ < C₂
C₁ > C₂
C₁ ≥ C₂

37. Density ratio 3:4, specific heat ratio 4:3. Thermal capacity per unit volume ratio?

[IOM]

9:16
16:9
1:1
3:2

38. Sphere radii ratio 4:9, specific heat ratio 9:4. Thermal capacity ratio?

81:16
16:81
3:2
1:1

39. 50g copper at 100°C placed on ice. Ice melted? (c_Cu=0.1 cal/gm°C, L_f=80 cal/gm)

6.15 gm
6.20 gm
6.25 gm
6.30 gm

40. Cooking is fast in pressure cooker because:

[MOE/KU]

Boiling point rises with pressure
Boiling point lowers with pressure
More steam at 100°C
More pressure at 100°C

41. Water falls 84m. Half KE → heat. Temperature rise? (g=10m/s²)

0.10°C
0.20°C
0.30°C
0.40°C

42. Liquids at 20°C and 40°C. Same mass mixed → 32°C. Specific heat ratio?

43. Steam at 100°C → 1.1kg water + 0.02kg calorimeter at 15°C → 80°C. Steam condensed?

[IE 2007]

0.13 kg
0.065 kg
0.260 kg
0.130 kg

44. 10g ice at 0°C + 55g water equivalent tumbler at 40°C. Final temp? (L=80 cal/g)

31°C
22°C
19°C
15°C

45. Water at -10°C in insulated container + ice crystal. Ratio of ice formed to initial water?

46. Heat from condensing x g steam at 100°C converts y g ice at 0°C → water at 100°C. x:y?

47. 100% RH at 30°C → dew point is:

0°C
30°C
70°C
100°C

48. Man feels hottest when relative humidity is:

49. Dew formation at 4.6°C, dew at 5.4°C, air temp=20°C. RH? (SVP at 5°C=6.5mmHg, 20°C=17.5mmHg)

[IOM 2010]

37%
100%
69%
70%

50. Geyser ejects 1L/min (22°C → 37°C). Power?

[IOM 2016]

1050 W
760 W
2055 W
1890 W

51. Man chews 60gm ice/min (L_f=80 cal/gm). Power?

[IOM 2017]

0.336 W
336 W
7000 W
0.1 W

52. When water is heated steadily, temperature stops rising when it starts to:

[KU 2017]

Evaporate
Boil
Condense
Release heat