Does Organ Pipe Increase Temperature?

The effect of heat the air on the frequency of the pipe is much greater than the increase in length of the pipe so the frequency of an organ pipe increases as temperature rises.

At what temperature does an organ pipe increase?

Q. Assertion : The fundamental frequency of an open organ pipe increases as the temperature is increased. Reason : This is because as the temperature increases, the velocity of sound increases more rapidly than length of the pipe.

Would you expect the pitch of an organ pipe to change with an increase in temperature How?

If temperature increases the speed of sound increases and hence the frequency increases. So increase in temperature causes increase in pitch.