Question

question 50
the most common compound or molecule is living systems.
a carbon
b water
c carbon dioxide
d sodium chloride
e carbohydrates
question 51
compounds that contain carbon and hydrogen together are called ______ compounds.
a ionic
b organic
c inorganic
d hydrolytic

Explanation:

• For Question 50: Water is the most abundant compound in living systems. It is involved in many biological processes such as transport, temperature regulation, and as a solvent for biochemical reactions. Carbon is an element (not a compound/molecule in this context), carbon dioxide is a waste product in respiration for many organisms, sodium chloride is present but not as abundant as water, and carbohydrates are important but less abundant than water.
• For Question 51: Organic compounds are defined as compounds that contain carbon and hydrogen. Ionic compounds involve the transfer of electrons (e.g., NaCl), inorganic compounds generally do not have the C - H bond (though there are some exceptions like \(CO_2\)), and hydrolytic refers to a type of reaction (hydrolysis) not a class of compounds.

Answer:

Question 50: B. water
Question 51: B. organic