What apparatus would you use to measure 30 temperature of liquid?

To measure the temperature of a liquid accurately, you would use a thermometer, preferably a digital or alcohol thermometer for precise readings. Ensure the thermometer is calibrated and suitable for the temperature range of the liquid being measured. Immerse the thermometer's bulb or probe into the liquid, ensuring it does not touch the sides of the container for an accurate measurement. Wait for the reading to stabilize before recording the temperature.