Purple cabbage sits in front of a series of colored test tubes labeled with numbers. The color-number combinations from left are light pink 2, dark pink 3, pale pink 4, pale purple 5, purple 6, blue purple 7, blue 8, blue green 9, green 10, yellow green 11. Cabbage juice indicator solutions can show pH values from acidic to basic.

Which color represents the most basic solution?

Which color represents the most acidic solution?

Which color represents a neutral solution?

aquifers are bounded above and below by impermeable rock. the driving force of groundwater movement in confined aquifers is pressure, rather than gravity.

substituting a hydrogen atom with a halogen in a hydrocarbon:

- the single bond remains single. a is wrong.

- the bond with hydrogen is as strong as with a halogen. c is wrong

- a hydrocarbon is saturated if there is no double bond. we do not know that so d is wrong.

- carbon will always have four valence electrons. e is wrong.

by elimination, the correct answer is b. the boiling point of the new compound increases.