Chapter 1 Online quizzes

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Neutral (uncharged) atoms of an element always have:

different numbers of protons and electrons. correct incorrect

the same number of neutrons and electrons. correct incorrect

the same number of neutrons and protons. correct incorrect

the same number of protons and electrons. correct incorrect

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Different isotopes of an element are defined as atoms with:

the same atomic number but different numbers of electrons. correct incorrect

the same atomic number but different numbers of neutrons. correct incorrect

a different atomic number but the same numbers of protons. correct incorrect

the same atomic number but different numbers of protons. correct incorrect

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What is the chemical symbol for sodium, an essential element for all life?

So correct incorrect

Sm correct incorrect

Na correct incorrect

K correct incorrect

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What is the length of a typical hydrogen bond?

2 micrometres. correct incorrect

0.2 nanometres correct incorrect

2 nanometres. correct incorrect

0.2 millimetres correct incorrect

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Reactions that release a molecule of water when two substrates are joined together are known as:

Condensation correct incorrect

Combustion correct incorrect

Isomerisation correct incorrect

Hydrolysis correct incorrect

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D-Glucose and D-Galactose are classified as what type of monosaccharides?

Triose correct incorrect

Tetrose correct incorrect

Pentose correct incorrect

Hexose correct incorrect

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Which of the following molecules is a disaccharide?

Glucose correct incorrect

Lactose correct incorrect

Galactose correct incorrect

Fructose correct incorrect

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Which glucose polymer is a modified form of cellulose?

Viscose correct incorrect

Starch correct incorrect

Glycogen correct incorrect

Amylose correct incorrect

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Which of these animals is not a ruminant?

Cow correct incorrect

Sheep correct incorrect

Panda correct incorrect

Goat correct incorrect

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The most abundant biomolecules on Earth are:

Carbohydrates correct incorrect

Proteins correct incorrect

Lipids correct incorrect

Nucleic acids correct incorrect