Temperature Points on Celsius Scale
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Questions and Answers

What is the temperature of ice point on the Celsius scale?

  • 212°F
  • 0°C (correct)
  • 100°C
  • 32°F

Where is the upper fixed point located on the Fahrenheit scale?

  • 0°F
  • 100°F
  • 32°F
  • 212°F (correct)

What is the equivalent of ice point in Kelvin scale?

  • -273 K
  • 373 K
  • 0 K
  • 273 K (correct)

What is the steam point value in Fahrenheit scale?

<p>212°F (B)</p> Signup and view all the answers

Which scale has the upper fixed point at 100°C?

<p>Celsius scale (D)</p> Signup and view all the answers

At what temperature does water start changing into steam at normal atmospheric pressure on the Kelvin scale?

<p>+100 K (A)</p> Signup and view all the answers

Why is one end of the girder not fixed into the concrete or brick pillars?

<p>To allow for free expansion and contraction of the girder in response to temperature changes (B)</p> Signup and view all the answers

What is the purpose of adding ink to the water in the experiment described?

<p>To make the water more visible (C)</p> Signup and view all the answers

Why is mercury used as a thermometric liquid?

<p>Because it expands more and uniformly over a wide range of temperatures (B)</p> Signup and view all the answers

In the experiment, why is the cork in the bottle tightly fitted?

<p>To prevent leakage of ink (D)</p> Signup and view all the answers

What happens to the water level in the straw when the bottle is heated?

<p>It rises (A)</p> Signup and view all the answers

What role do the two bricks play in the experiment?

<p>They act as a stable base for heating the bottle (A)</p> Signup and view all the answers

Why is it important to leave gaps between successive rails on a railway track?

<p>To avoid the rails from bending sideways due to expansion (A)</p> Signup and view all the answers

Why does pouring hot water on the neck of a bottle help in removing a glass stopper stuck inside?

<p>The hot water expands, loosening the stopper (A)</p> Signup and view all the answers

Why are cement floors laid in small pieces with gaps in between?

<p>To allow for expansion during hot weather (A)</p> Signup and view all the answers

What is the purpose of not fixing one end of a steel girder in a bridge, but keeping it on rollers?

<p>To allow for contraction and expansion due to temperature changes (D)</p> Signup and view all the answers

Why are iron tyres of bullock-cart wheels made slightly smaller than the wooden wheels?

<p>To allow for expansion during heating (C)</p> Signup and view all the answers

How does heating a glass stopper stuck in a bottle neck help in removing it?

<p>It expands the glass stopper (C)</p> Signup and view all the answers

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