A student takes some water in a beaker and heats it over a flame for determining its boiling point - Science - Matter in Our Surroundings

Question

A student takes some water in a beaker and heats it over a flame
for determining its boiling point He keeps on taking its
temperature readings He would observe that the temperature of
water:
(1) keeps on increasing regularly
(2) keeps on increasing irregularly
(3) first increases slowly, then decreases rapidly and
eventually becomes constant
(4) first increases gradually and then becomes constant

Mohit Gupta · Accepted Answer

The correct option is D During any phase transition i e melting,
boiling, freezing, etc the temperature of the system remain
constant until all the substance changed into the other state
For reason please refer to the following link:

https://www meritnation
com/ask-answer/question/for-any-substance-why-does-the-temperature-remain-constant/matter-in-our-surroundings/6290847