Atoms and Reactions Quiz 2

Description

A level Chemistry (2.1 Atoms and Reactions) Quiz on Atoms and Reactions Quiz 2, created by Yinka F on 12/03/2018.
Yinka F
Quiz by Yinka F, updated more than 1 year ago
Yinka F
Created by Yinka F over 6 years ago
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Resource summary

Question 1

Question
What is the relative mass of an electron?
Answer
  • 1/200
  • 1/2000
  • 1/20
  • 1

Question 2

Question
A negative charge means that there's more protons than electrons
Answer
  • True
  • False

Question 3

Question
What did Bohr discover?
Answer
  • Protons
  • Electrons
  • Neutrons
  • Ions
  • Shells
  • Noble gases are inert
  • Plum pudding model
  • Atoms are solid spheres
  • The nucleus is positively charged

Question 4

Question
Relative isotopic mass is the average mass of a molecule compared to 1/12 of the mass of an atom of carbon-12
Answer
  • True
  • False

Question 5

Question
What is the equation linking moles, mass and molar mass?
Answer
  • Moles = molar mass / mass
  • Molar mass = moles / mass
  • Moles = mass / molar mass

Question 6

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

Question 7

Question
Acids are proton acceptors
Answer
  • True
  • False

Question 8

Question
H⁺ ions can never exist by themselves in water
Answer
  • True
  • False

Question 9

Question
What are the products of a reaction between acids and bases?
Answer
  • Salt and water
  • Salt and hydrogen
  • Salt, carbon dioxide and water
  • Salt

Question 10

Question
What are the products of acids and metal hydroxides?
Answer
  • Salt and hydrogen
  • Salt and water
  • Salt, carbon dioxide and water
  • Salt and metal oxides

Question 11

Question
The water in a lattice is called [blank_start]water of crystallisation[blank_end]. A solid salt containing water of crystallisation is [blank_start]hydrated[blank_end]. A salt is [blank_start]anhydrous[blank_end] if it doesn't contain water of crystallisation.
Answer
  • water of crystallisation
  • hydrated
  • anhydrous

Question 12

Question
In the presence of an acid, what colour does methyl orange turn?
Answer
  • Red
  • Yellow
  • Pink
  • Orange
  • Colourless

Question 13

Question
In the presence of an alkali, what colour does phenolphthalein turn?
Answer
  • Red
  • Yellow
  • Pink
  • Orange
  • Colourless

Question 14

Question
Compared to a monoprotic acid, you'll need to double the number of moles of base to neutralise a diprotic acid
Answer
  • True
  • False

Question 15

Question
The actual mass/yield will always be [blank_start]less[blank_end] than the theoretical yield as not all chemicals [blank_start]react[blank_end] fully and some chemicals are [blank_start]lost[blank_end] between transfers
Answer
  • less
  • react
  • lost

Question 16

Question
In a substitution reaction, the atom economy is always less than 100%
Answer
  • True
  • False

Question 17

Question
What are the CORRECT rules for oxidation numbers?
Answer
  • 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

Question 18

Question
Oxidation is a gain in electrons
Answer
  • True
  • False

Question 19

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

Question 20

Question
What is the chemical formula of sulphate (VI) ions?
Answer
  • SO₃²⁻
  • SO₄²⁻
  • SO₃⁻
  • SO₄⁻
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