Given below are two statements. One is labelled as Assertion A nd the other is labelled as Reason R.
Assertion A : Sharp glass edge becomes smooth on heating it upto its melting point.
Reason R : The viscosity of glass decreases on melting.
Choose the most appropriate answer from the options given below.
Solution
<p>On heating the glass, it melts and takes up rounded shape at the
edges, which has minimum surface area. This is due to the property
of surface tension of liquids and not due to decrease in viscosity.</p>
<p>Viscosity generally decreases as the temperature increases.</p>
<p>Hence, both A and R are true but R is not the correct explanation
of A.</p>
About this question
Subject: Chemistry · Chapter: States of Matter · Topic: Gas Laws
This question is part of PrepWiser's free JEE Main question bank. 142 more solved questions on States of Matter are available — start with the harder ones if your accuracy is >70%.