Yinka F
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A level Chemistry (2.1 Atoms and Reactions) Quiz on Atoms and Reactions Quiz 2, created by Yinka F on 12/03/2018.

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Yinka F
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Atoms and Reactions Quiz 2

Question 1 of 20

1

What is the relative mass of an electron?

Select one of the following:

  • 1/200

  • 1/2000

  • 1/20

  • 1

Explanation

Question 2 of 20

1

A negative charge means that there's more protons than electrons

Select one of the following:

  • True
  • False

Explanation

Question 3 of 20

1

What did Bohr discover?

Select one or more of the following:

  • Protons

  • Electrons

  • Neutrons

  • Ions

  • Shells

  • Noble gases are inert

  • Plum pudding model

  • Atoms are solid spheres

  • The nucleus is positively charged

Explanation

Question 4 of 20

1

Relative isotopic mass is the average mass of a molecule compared to 1/12 of the mass of an atom of carbon-12

Select one of the following:

  • True
  • False

Explanation

Question 5 of 20

1

What is the equation linking moles, mass and molar mass?

Select one of the following:

  • Moles = molar mass / mass

  • Molar mass = moles / mass

  • Moles = mass / molar mass

Explanation

Question 6 of 20

1

Select from the dropdown lists to complete the text.

If ( concentration, temperature ) and pressure stay the same, one mole of any gas always has the same ( volume, mass, partial pressure ) - this is known as the molar gas volume (( moldm⁻³, dm³mol⁻¹, gdm⁻³ )).

Explanation

Question 7 of 20

1

Acids are proton acceptors

Select one of the following:

  • True
  • False

Explanation

Question 8 of 20

1

H⁺ ions can never exist by themselves in water

Select one of the following:

  • True
  • False

Explanation

Question 9 of 20

1

What are the products of a reaction between acids and bases?

Select one of the following:

  • Salt and water

  • Salt and hydrogen

  • Salt, carbon dioxide and water

  • Salt

Explanation

Question 10 of 20

1

What are the products of acids and metal hydroxides?

Select one of the following:

  • Salt and hydrogen

  • Salt and water

  • Salt, carbon dioxide and water

  • Salt and metal oxides

Explanation

Question 11 of 20

1

Fill the blank spaces to complete the text.

The water in a lattice is called . A solid salt containing water of crystallisation is . A salt is if it doesn't contain water of crystallisation.

Explanation

Question 12 of 20

1

In the presence of an acid, what colour does methyl orange turn?

Select one of the following:

  • Red

  • Yellow

  • Pink

  • Orange

  • Colourless

Explanation

Question 13 of 20

1

In the presence of an alkali, what colour does phenolphthalein turn?

Select one of the following:

  • Red

  • Yellow

  • Pink

  • Orange

  • Colourless

Explanation

Question 14 of 20

1

Compared to a monoprotic acid, you'll need to double the number of moles of base to neutralise a diprotic acid

Select one of the following:

  • True
  • False

Explanation

Question 15 of 20

1

Fill the blank spaces to complete the text.

The actual mass/yield will always be than the theoretical yield as not all chemicals fully and some chemicals are between transfers

Explanation

Question 16 of 20

1

In a substitution reaction, the atom economy is always less than 100%

Select one of the following:

  • True
  • False

Explanation

Question 17 of 20

1

What are the CORRECT rules for oxidation numbers?

Select one or more of the following:

  • Uncombined elements (or elements bonded to identical atoms) have an oxidation number of 0

  • Oxygen always has an oxidation number of -2

  • Hydrogen always has an oxidation number of +1, except in metal hybrids where it's -1 and molecular hydrogen where it's 0

  • The sum of the oxidation numbers for a neutral compound is 0

  • For molecular ions, each of the constituent atoms has the same oxidation number of as the molecule's overall charge

Explanation

Question 18 of 20

1

Oxidation is a gain in electrons

Select one of the following:

  • True
  • False

Explanation

Question 19 of 20

1

In the reaction below, which elements have been oxidised and which have been reduced:
2K + H₂SO₄ --> K₂SO₄ + H₂

Select one of the following:

  • K has been oxidised, H has been reduced

  • H has been oxidised, K has been reduced

  • S has been oxidised, K has been reduced

  • K has been oxidised, S has been reduced

Explanation

Question 20 of 20

1

What is the chemical formula of sulphate (VI) ions?

Select one of the following:

  • SO₃²⁻

  • SO₄²⁻

  • SO₃⁻

  • SO₄⁻

Explanation

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