Question

4. Which one of the following groups of chemical compounds is composed entirely of organic compounds? A. Ch3OCH3, Ca3(PO4)2, CO2, H2CO3 B. C2H2, CH4, CaCl2, CaCN2 C. C2H4O, CH2O, CaSO4, C3H5(OH)3 D. C6H6, C2H5OH, C6H5CH3, C3H5(NO3)3

Answer 1

I believe the correct answer is D.
In every other answer choice there was at least one inorganic compound:

In the other optionsCaSO4, CaCl2, Ca3(PO4)2 are not organic

I hope this helps!!

Answer 2

Answer: The correct answer is Option D.

Explanation: Organic compounds are defined as the compounds which have hydrogen and carbon atoms in it. They are also known as hydrocarbons.

From the given options:

Option 1: $Ca_3(PO_4)_2\text{ and }CO_2$ are not organic compounds because these two compounds do not contain hydrogen element in it.

Option 2: $CaCl_2\text{ and }CaCN_2$ are not organic compounds because these two compounds do not contain hydrogen and carbon elements in it.

Option 3: $CaSO_4$ is not an organic compound because this compound do not contain hydrogen and carbon elements in it.

Option 4: All the compounds contain hydrogen and carbon elements in it and hence, all the compounds are organic compounds.

Therefore, the correct option is Option D.