Properties of Compounds

According to the pH range which substance is more acidic than lemon juice

• Hydrochloric acid

• cabbage

• milk

When you place blue litmus paper into an unknown clear solution, the blue litmus paper turns red. Which of the following represents the most logical conclusion?

• The substance has a pH value of "2".

• The substance is a base.

• The substance has a pH value of "7".

• The substance is acidic.

Acids are __________, which means they "eat away" at other materials.

• transitional metal

• alkaline

• flammable

• corrosive

Do acids and bases conduct electricity?

• Only acids conduct electricity

• Only bases conduct electricity

• Bases and acids conduct electricity

• Neither conduct electricity

Which of the following salts will give an aqueous solution having pH of almost 7?

• Ammonium nitrate

• Ammonium chloride

• Calcium chloride

• Sodium chloride

Which of the following indicators turn red in an acidic solution?

• phenolphthalein

• red litmus

• turmeric

• methyl orange

Which of the following is a property of an ionic compound?

• high melting point

• lustrous

• malleable

• liquid at room temperature

Tags

NGSS.MS-PS3-4

In what form can an ionic compound conduct electricity?

• when dissolved in water

• as a solid

• as a crystal

• when warmed slightly

Which of the following is a characteristic property of covalent compounds?

• High melting and boiling points

• Conduct electricity in solid state

• Low melting and boiling points

• Form crystal lattice structures

What happens to the boiling point of a liquid when a non-volatile solute is added?

• It decreases

• It remains the same

• It increases

• It first decreases then increases