11SCI - Chemistry Lesson 1

What is a compound?

• A) A substance that consists of a single type of atom.

• B) Something made up of different elements not chemically joined together

• C) A pure substance that cannot be separated into its components by physical means

• D) Something made up of two or more different types of atoms chemically bonded together

What element has the symbol C?

• Calcium

• Carbon

• Californium

• Chlorine

What is the element symbol for Oxygen?

• O

• 0

• Ox

• ox

A pH value of 7 indicates:

• a) A strongly acidic solution

• b) A neutral solution

• c) A strongly basic solution

• d) An alkaline solution

What is the primary function of a universal indicator in chemistry?

• A) To determine the temperature of a solution

• B) To measure the concentration of ions in a solution

• C) To identify the pH of a solution

• D) To detect the presence of heavy metals in a solution

A(n) ______ is a substance with a pH less than 7

• Acid
• Alkaline
• Base
• Buffer

Which of the following is NOT a mixture?

• A) A bag of flour.

• B) A bowl of cereal with milk.

• C) A bag of assorted lollies.

• D) A salad with various ingredients.

Which of the following best describes an element?

• A) A pure substance composed of two or more different types of atoms.

• B) A substance that can be broken down into simpler substances by chemical reactions.

• C) A substance made up of only one type of atom.

• D) A combination of two or more different elements in fixed proportions.

Which of the following is a noble gas?

• nitrogen

• helium

• carbon dioxide

• oxygen

The pH scale is a range from:

• 1-7
• 0-14
• 1-5
• 1-20