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तमिलनाडु बोर्ड ऑफ सेकेंडरी एज्युकेशनएसएसएलसी (अंग्रेजी माध्यम) कक्षा ९

Assertion: When water is heated up to 100°C, there is no raise in temperature until all water gets converted into water vapour. Reason: Boiling point of water is 10°C.

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प्रश्न

Assertion: When water is heated up to 100°C, there is no raise in temperature until all water gets converted into water vapour.

Reason: Boiling point of water is 10°C.

विकल्प

  • If both assertion and reason are true and reason is the correct explanation of assertion.

  • If both assertion and reason are true but reason is not the correct explanation of assertion.

  • If assertion is true but reason is false.

  • If assertion is false but reason is true.

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उत्तर

If assertion is true but reason is false.

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अध्याय 7: Heat - Exercise [पृष्ठ ८९]

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सामाचीर कलवी Science [English] Class 9 TN Board
अध्याय 7 Heat
Exercise | Q III. 3. | पृष्ठ ८९

संबंधित प्रश्न

Convert – 40°F to the Celsius scale.


Fill in the blank:

°C is the unit of ......................


Distinguish between heat and temperature. 


Draw a diagram showing the temperature of various layers of water in an ice covered pond. 


Name or state the following:

The law which states that pressure remaining constant the volume of a given mass of dry gas is directly proportional to its absolute [Kelvin] temperature.


Define heat energy on the basis of kinetic theory of matter.


Define calorie. How many joules make one calorie?


1 joule = 4.2 calorie
Is this relation correct?


Convert 80 K temperatures on the Celsius scale.


Why do telephone wires sag during summer?


Is conduction possible in gases?


What do you mean by linear expansion?


Give a scientific reason for the following:
It is better to use thin blankets to keep the body warm rather than using a single blanket of thickness equal to their combined thickness.


Name two liquid thermometers that are commonly used.

Out of metals, liquids, and gases:

Which one is worst conductor of heat?


Why are hollow bricks used in the construction of cold storage rooms?

Explain the following:
Conduction is not possible in vacuum.


Explain the following:
It is cool in the shade, when it is hot outside.


The following figure shows a rectangular box with two tubes P and Q at the top. A burning candle R is placed under the tube P. The candle burns brightly.

Explain:

(i) How is the air in the box circulating?
(ii) What will happen if the opening Q is closed?


What makes the isotherms run zigzag over continental areas? 


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