The following line graph shows the change in temperature of a block of ice when heated.

Study the above graph carefully and answer the questions given below :
`(i)` For how many seconds did the ice block have no change in temperature?
`(ii)` For how long was there a change in temperature?
`(iii)` After how many seconds of heating did the temperature become constant at `100^(@)C` ?
`(iv)` What was the temperature after `25` seconds?
`(v)` What will be the temperature after `1.5` minutes ? Justify your answer.

Answer

`(i) 20` seconds `(ii) 30` seconds `(iii) 50` seconds `(iv) 18^(@)C` `(v) 100^(@)C`