Question

PLEASE HELP!!!!!

Q1: Give the letter of a substance that is a solid at 20 °C
Q2: Give the letter of a substance that is a liquid at 50 °C

Answer 1

A1: Z

A2: Y

Step-by-step explanation:

Q1: Z is the only one with a melting point high than 20 °C.

Q2: Y is the only substance with both a melting point lower than 50 °C and a boiling point higher than 50°C