EASY
11th West Bengal Board
IMPORTANT
Earn 100

In a pressure cooker, the cooking becomes fast because

50% studentsanswered this correctly

Important Questions on Calorimetry and Change of State

HARD
11th West Bengal Board
IMPORTANT
A Text Book of PHYSICS PART I : CLASS 11>Chapter 17 - Calorimetry and Change of State>EXERCISE>Q 40
Sometimes white vapour like steam accumulates surrounding a big chunk of ice but no such steam is found around a cup of water. The reason is
MEDIUM
11th West Bengal Board
IMPORTANT
A Text Book of PHYSICS PART I : CLASS 11>Chapter 17 - Calorimetry and Change of State>EXERCISE>Q 41
When ice melts, it contracts in volume. When the pressure on a lump of ice is increased, its melting point
EASY
11th West Bengal Board
IMPORTANT
A Text Book of PHYSICS PART I : CLASS 11>Chapter 17 - Calorimetry and Change of State>EXERCISE>Q 42
In a closed vessel, there is some water at 27°C over which air saturated with water vapour exists. The total pressure in the vessel at that temperature is 76 cm of Hg. S.V.P, vapour pressure at 27∘C=2.8 cm. Pressure of air alone is
EASY
11th West Bengal Board
IMPORTANT
A Text Book of PHYSICS PART I : CLASS 11>Chapter 17 - Calorimetry and Change of State>EXERCISE>Q 43
It is difficult to cook rice in an open vessel by boiling it at high attitudes because of.
HARD
11th West Bengal Board
IMPORTANT
A Text Book of PHYSICS PART I : CLASS 11>Chapter 17 - Calorimetry and Change of State>EXERCISE>Q 44
A jar contains a gas and a few drops of water at TK. The pressure in the jar is 0.830 m of mercury. The temperature of the jar is reduced by 1%. The saturated vapour pressure of water at the two temperatures are 30×10-3 m and  25×10-3 m of Hg. The new pressure in the jar is
HARD
11th West Bengal Board
IMPORTANT
A Text Book of PHYSICS PART I : CLASS 11>Chapter 17 - Calorimetry and Change of State>EXERCISE>Q 45
Three bodies of the same material and having masses m,m and 3m temperatures 40°C,50°C and 60°C respectively. If the bodies are brought in thermal contact, the final temperature will be