# When a hot liquid sample is mixed with a cold one , the temperature of the mixture

$(a)\;first\;decreases\;then\;becomes\;constant\qquad(b)\;first\;increase\;then\;becomes\;constant\qquad(c)\;continuously\;increases\qquad(d)\;is\;undefined\;for\;sometime\;and\;then\;becomes\;nearly\;constant$

Answer : (d) is undefined for sometime and then becomes nearly constant
Explanation :
The temperature is undefined for sometime as mixing is not a uniform - process in the starting but as the time passes , the liquids are mixed uniformly and the temperature is nearly constant