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Elements, Compounds, and Mixtures

Tests understanding of chemical elements, compounds, mixtures, atomic structure, and basic chemistry concepts

20 Questions Published
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Questions

Question 1 Multiple Choice (Single Answer)

Other than O and C, the main elements of a brick wall includes

  1. Si
  2. Ca
  3. Both A and B
  4. None of the Above
Question 2 Multiple Choice (Single Answer)

Which of the following is NOT a pure substance?

  1. salt
  2. soil
  3. iron
  4. Gold
Question 3 Multiple Choice (Single Answer)

Which of the following is a metal?

  1. water
  2. iron
  3. Chlorine
  4. Ice
Question 4 Multiple Choice (Single Answer)

A particle may be

  1. an atom
  2. a molecule
  3. an isotope
  4. all of these
Question 5 Multiple Choice (Single Answer)

Which of the following is an element but NOT a metal?

  1. Oxygen
  2. Copper
  3. Aluminium
  4. Water
Question 6 Multiple Choice (Single Answer)

The symbol of Magnesium is

  1. Mg
  2. Mn
  3. Hg
  4. M
Question 7 Multiple Choice (Single Answer)

Brass is an example of

  1. an alloy
  2. a compound
  3. a mixture
  4. an element
Question 8 Multiple Choice (Single Answer)

Which of the following substances makes up around one fifth of the air we breathe?

  1. Iron
  2. Oxygen
  3. Chlorophyll
  4. Sodium
Question 9 Multiple Choice (Single Answer)

Which of the following is NOT true of matter on the Earth?

  1. Matter is always composed of atoms
  2. All substances are made of matter
  3. All matter contains chemical elements
  4. Matter always consists of molecules
Question 10 Multiple Choice (Single Answer)

Which of the following does NOT contain any chemical substances?

  1. Air
  2. water
  3. A wood fire
  4. Light
Question 11 Multiple Choice (Single Answer)

Which element can be found as charcoal, diamond or buckyballs?

  1. Hydrogen
  2. Carbon
  3. Oxygen
  4. Silver
Question 12 Multiple Choice (Single Answer)

Which of the following is an element?

  1. Water
  2. stean
  3. snow
  4. iron
Question 13 Multiple Choice (Single Answer)

What is a chemical compound?

  1. A subatomic particle
  2. A combination of two protons and two electrons
  3. A combination of two or more chemical elements
  4. A mixture of two or more substances
Question 14 Multiple Choice (Single Answer)

Which two elements, when combined, form water?

  1. Hydrogen and oxygen
  2. Hydrogen and nitrogen
  3. Sulfur and oxygen
  4. Sodium and oxygen
Question 15 Multiple Choice (Single Answer)

Copper sulfate can be further subdivided into simpler substances by chemical means only. Therefore, it is _______.

  1. a compound
  2. a mixture
  3. an element
  4. atom
Question 16 Multiple Choice (Single Answer)

Which of the following is a mixture?

  1. Potassium carbonate
  2. Potassium carbonate solution Right!
  3. Potassium
  4. Sodium
Question 17 Multiple Choice (Single Answer)

Naturally occurring elements are

  1. 82
  2. 92
  3. 99
  4. above 100 by now
Question 18 Multiple Choice (Single Answer)

Which of the following is a compound?

  1. Sodium
  2. Sodium sulfide
  3. Sodium sulfide solution
  4. Pottasium
Question 19 Multiple Choice (Single Answer)

Which of the following is an impure substance made up of two or more types of atoms or elements?

  1. a compound
  2. an element
  3. a mixture
  4. an atom
Question 20 Multiple Choice (Single Answer)

Copper sulfate solution can be further subdivided into simpler substances by physical (mechanical) means. Therefore, it is _______.

  1. a compound
  2. an element
  3. a mixture
  4. an atom
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