1&2&3 please

Multiple Choice Identify the choice that best completes the statement or answers the question. 1. Why are thiols added to methane gas by gas delivery companies? a. to give the methane gas a smell to detect leaks b. to clean the methane gas c. to give the methane gas colour to detect leaks d. all of the above 2. Which of the following molecules demonstrates a square pyramidal molecular structure? a. XeO2 b. CCl4 c. XeF4 d. CH4 3. What was Dr, Ronald Gillespie's motivation for developing VSEPR theory? a. to explain the formation of hydrogea bonds in substances such as water and hydrogen fluoride b. to help his students understand how bonding affects three-dimensional struchures c. to describe how orbitals combine to form new orbitals used for bonding d. to explain how bonds form in an atom