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This quiz pulls questions at random from the entire 1100+ question-bank

1. In aluminium extraction, what is the ionic half-equation for the reaction at the negative electrode?

Question 1 of 10

2. Describe the method to prepare a pure dry sample of copper sulfate (soluble salt)

Question 2 of 10

3.

A student has been asked to draw all the alkene isomers of C₄H₁₀ and draws the following. Which of the following statements about the student's diagram is correct?

Question 3 of 10

4. What is the name of this molecule?

Question 4 of 10

5. Write the chemical equation for sulfur dioxide dissolving in water to form acid rain

Question 5 of 10

6. Explain what a monomer is

Question 6 of 10

7. On a graph showing gas produced (vertical axis) over time (horizontal axis), how does the line tell us the rate of reaction?

Question 7 of 10

8. What else is needed for methane to react with bromine?

Question 8 of 10

9. What observations are made when magnesium burns in air?

Question 9 of 10

10. Of which homologous series is -COO- the functional group?

Question 10 of 10


 

2022-03-09T21:22:06+00:00Categories: Uncategorized|Tags: |

1.01 use the following units: kilogram (kg), metre (m), metre/second (m/s), metre/second^2(m/s^2), newton (N), second (s) and newton/kilogram(N/kg)

Make sure you are familiar with units for 

Mass: kilogram (kg)

Distance: metre (m)

Speed: metre per second (m/s)

Acceleration: metre per second squared (m/s^2)

Force: newton (N)

Time: second (s) 

Gravity: newton/kilogram (N/kg) 

 

2022-11-29T13:44:48+00:00Categories: 1 Forces and motion, 1(a) Units, Edexcel iGCSE Physics, Uncategorized|Tags: , , , , , , , , , , , |

1.03 plot and explain distance-time graphs

A distance time graph has distance on the y axis (usually in metres) and time on the x axis (usually in seconds). The gradient of the line (change in y/ change in x) is the speed. If the line is flat then the object is stationary.    

2022-11-29T13:32:05+00:00Categories: (b) movement and position, 1 Forces and motion, Edexcel iGCSE Physics, Uncategorized|Tags: , , , , , , , |

1.04 know and use the relationship between average speed, distance moved and time taken

To calculate average speed use 

speed (m/s) = distance travelled (m)/ time taken (s)

2022-11-29T13:32:19+00:00Categories: (b) movement and position, 1 Forces and motion, Edexcel iGCSE Physics, Uncategorized|Tags: , , , , , , , , , |

1.05 practical: investigate the motion of everyday objects such as a toy car or tennis ball

Apparatus: stop watch and metre rule

mark the start and end positions for the know distance 

use a metre rule to measure the distance 

line up front of car with start point, release and start timer 

move eyes to end point 

stop timer when front of car passes end point 

improve by repeating and averaging 

make sure car starts from stationary 

calculate average speed using : average speed = distance travelled/ time taken

2022-11-29T14:21:07+00:00Categories: (b) movement and position, 1 Forces and motion, Edexcel iGCSE Physics, Uncategorized|Tags: , , , , , , |

1.07 plot and explain velocity-time graphs

on a velocity time graph the velocity-time graph the velocity is on the y axis (usually in m/s) and time is on the x axis (usually in s). If the line is flat then the object is moving at a constant velocity. the gradient of the line is the acceleration. The area under the line is the distance travelled.  

2022-11-29T14:21:46+00:00Categories: (b) movement and position, 1 Forces and motion, Edexcel iGCSE Physics, Uncategorized|Tags: , , , , , , , |

1.09 determine the distance travelled from the area between a velocity-time graph and the time axis

The area under the graph can be calculated as rectangles and triangles, or by counting boxes, is equal to the distance travelled. 

2022-11-29T14:23:29+00:00Categories: (b) movement and position, 1 Forces and motion, Edexcel iGCSE Physics, Uncategorized|Tags: , , , , , , , |

1.11 describe the effects of forces between bodies such as changes in speed, shape or direction

Forces can act on a body to change the velocity, so the speed, direction or both.

Or forces can change the shape of a body, stretching it squishing it or twisting it. 

2022-11-29T14:23:47+00:00Categories: (c) forces, movement, shape and momentum, 1 Forces and motion, Edexcel iGCSE Physics, Uncategorized|Tags: , , , , , , , , , , , |

1.12 identify different types of force such as gravitational or electrostatic

different types of forces include:

Gravitational, weight, friction, electrostatic, air resistance (drag), tension (force in a spring), up thrust, lift, thrust 

2022-11-29T14:24:22+00:00Categories: (c) forces, movement, shape and momentum, 1 Forces and motion, Edexcel iGCSE Physics, Uncategorized|Tags: , , , , , , , , , |

1.13 understand how vector quantities differ from scalar quantities

scalars are quantities with only magnitude (size)

vectors are quantities with magnitude (size) and direction 

2019-06-28T09:06:25+00:00Categories: (c) forces, movement, shape and momentum, 1 Forces and motion, Edexcel iGCSE Physics, Uncategorized|Tags: , , , , , , , , , , |

1.14 understand that force is a vector quantity

Force has a magnitude measured in (N) but it also has a direction, a push or a pull, up, down, left or right. So force is a vector.  

2019-06-28T09:06:42+00:00Categories: (c) forces, movement, shape and momentum, 1 Forces and motion, Edexcel iGCSE Physics, Uncategorized|Tags: , , , , , , , , , , |

1.17 know and use the relationship between unbalanced force, mass and acceleration : F = M x A

Force = Mass x Acceleration.

the force refers to the resultant force or the combined forces as seen in 1.15 

2022-11-29T14:25:22+00:00Categories: (c) forces, movement, shape and momentum, 1 Forces and motion, Edexcel iGCSE Physics, Uncategorized|Tags: , , , , , , , , |

1.18 know and use the relationship between weight, mass and gravitational field strength: W=mxg

Weight (N)= Mass (kg) x gravitational field strength (N/kg)

gravitational field strength on earth is approx. 10 N/kg and in GCSEs is taken to be 10 N/kg. 

2022-11-29T14:25:35+00:00Categories: (c) forces, movement, shape and momentum, 1 Forces and motion, Edexcel iGCSE Physics, Uncategorized|Tags: , , , , , , , , , |

1.20 describe the factors affecting vehicle stopping distance, including speed, mass, road condition and reaction time

Thinking distance Affected by:

Tiredness

Alcohol

speed of the car

Drugs (avoid as drugs can increase or decrease thinking distance) 

Braking distance affected by:

Road conditions 

Tyre conditions 

Brake conditions 

speed of the car

mass of the car

 

2022-11-29T14:26:01+00:00Categories: (c) forces, movement, shape and momentum, 1 Forces and motion, Edexcel iGCSE Physics, Uncategorized|Tags: , , , , , , |

1.21 describe the forces acting on falling objects (explain why falling objects reach a terminal velocity)

Initially the only force is weight as drag is proportional to velocity. So the object accelerates downwards. As it accelerates the velocity so the drag increases as well. meaning there is a smaller resultant force downwards so a smaller acceleration. Until the object reaches a speed where the drag is equal to the weight meaning there is no acceleration, this velocity is know as terminal velocity. 

2019-06-28T09:07:44+00:00Categories: (c) forces, movement, shape and momentum, 1 Forces and motion, Edexcel iGCSE Physics, Uncategorized|Tags: , , , , , , , |

1.22 practical investigate how extension varies with applied force for helical springs, metal wires and rubber bands

  1. Set up your apparatus as shown in the
  2. Measure the length of your spring without
    any hanging masses.
  3. Hang a mass of 100g on the spring
  4. Measure the new length of the spring
  5. Calculate the extension of the spring
  6. Repeat steps 3-5 for increasing the mass
    in increments of 100g
  7. Take note of your results in the table.
2019-06-28T09:08:02+00:00Categories: (c) forces, movement, shape and momentum, 1 Forces and motion, Edexcel iGCSE Physics, Uncategorized|Tags: , , , , , , |

1.23 know the the initial linear region of a force-extension graph is associated with Hooke’s law

Hooke’s law is that extension is directly proportional to force applied. This is shown by the straight line on the force-extension graph. Hooke’s law is obeyed as long as the line is straight.   

2019-06-28T09:08:24+00:00Categories: (c) forces, movement, shape and momentum, 1 Forces and motion, Edexcel iGCSE Physics, Uncategorized|Tags: , , , , , , |

1.24 describe elastic behaviour as the ability of a material to recover its original shape after the forces causing the deformation have been removed

Elastic behaviour is the ability of a material to recover original shape after the force is removed. in a spring this occurs when the force is lower than the elastic limit. loading and unloading force extension curves can be different as long as it returns to its original shape. 

2019-06-28T09:08:49+00:00Categories: (c) forces, movement, shape and momentum, 1 Forces and motion, Edexcel iGCSE Physics, Uncategorized|Tags: , , , , , , |

1.29 demonstrate an understanding of Newton’s third law

Every action has an equal and opposite reaction. 

Book pushes down on table, table pushes up on book. So book doesn’t accelerate. 

Table pushes down on floor, floor pushes up on table. So table doesn’t accelerate. 

2019-06-28T08:53:10+00:00Categories: (c) forces, movement, shape and momentum, 1 Forces and motion, Edexcel iGCSE Physics, Uncategorized|Tags: , , , , , |
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Section 1: Principles of chemistry

      a) States of matter

      b) Atoms

      c) Atomic structure

     d) Relative formula masses and molar volumes of gases

     e) Chemical formulae and chemical equations

     f) Ionic compounds

     g) Covalent substances

     h) Metallic crystals

     i) Electrolysis

 Section 2: Chemistry of the elements

     a) The Periodic Table

     b) Group 1 elements: lithium, sodium and potassium

     c) Group 7 elements: chlorine, bromine and iodine

     d) Oxygen and oxides

     e) Hydrogen and water

     f) Reactivity series

     g) Tests for ions and gases

Section 3: Organic chemistry

     a) Introduction

     b) Alkanes

     c) Alkenes

     d) Ethanol

Section 4: Physical chemistry

     a) Acids, alkalis and salts

     b) Energetics

     c) Rates of reaction

     d) Equilibria

Section 5: Chemistry in industry

     a) Extraction and uses of metals

     b) Crude oil

     c) Synthetic polymers

     d) The industrial manufacture of chemicals

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