the table describes how some substances were formed.\n| substance | description |\n| ---- | ---- |\n| p |…

the table describes how some substances were formed.\n| substance | description |\n| ---- | ---- |\n| p | formed by boiling pure water |\n| q | formed by combining three hydrogen atoms to every nitrogen atom |\n| r | formed by adding 5 g of sugar to 1 l of water |\n| s | formed by compressing carbon under high pressure |\nbased on the given descriptions, which substance is most likely a mixture?\no p\no q\no r\no s

the table describes how some substances were formed.\n| substance | description |\n| ---- | ---- |\n| p | formed by boiling pure water |\n| q | formed by combining three hydrogen atoms to every nitrogen atom |\n| r | formed by adding 5 g of sugar to 1 l of water |\n| s | formed by compressing carbon under high pressure |\nbased on the given descriptions, which substance is most likely a mixture?\no p\no q\no r\no s

Answer

Explanation:

Step1: Understand mixture concept

A mixture is a combination of two or more substances where they retain their individual properties and are not chemically combined.

Step2: Analyze substance P

Boiling pure water just changes its state (from liquid to gas), it is still water (a pure substance), not a mixture.

Step3: Analyze substance Q

Combining hydrogen and nitrogen atoms chemically forms ammonia ($NH_3$), it is a compound, not a mixture.

Step4: Analyze substance R

Adding sugar to water results in a sugar - water solution. Sugar and water are physically combined and can be separated by physical means like evaporation. It is a mixture.

Step5: Analyze substance S

Compressing carbon under high - pressure may change its physical form (e.g., from graphite to diamond), but it is still carbon (a pure substance), not a mixture.

Answer:

C. R