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GCSE Chemistry - questions based on diagrams 2.

Last updated 5 months ago
20 questions
5

Place the metals in order of reactivity from most reactive at the top to least reactive at the bottom

  1. Ca
  2. Mg
  3. Zn
  4. Fe
  5. Cu
6
The manganese oxide increases the rate of reaction as it is a _____________that provides an alternative reaction pathway of lower ______________________.
The gas is being collected in a ___________________________.
Another way to collect the gas would be by using a inverted _______________________in a water bath.
The gas could be tested using _____________________ .
The positive results would be ____________________________________
Other Answer Choices:
lime water going cloudy
graduated gas syringe.
catalyst
a lit splint
measuring cylinder
The glowing splint relighting.
limewater
a pop sound and water forming
activation energy
a glowing splint
4

To calculate the average rate of reaction

To measure the average rate of reaction over the first 30 seconds we would divide the __________________________________ by the .
Average rate = _______ / _______
Average rate = ______________.
Other Answer Choices:
time
30
1.3 cm3/s
40
total volume of oxygen at 30s
8

To calculate the rate of reaction at a specific time.



To calculate the rate of reaction at 30s.
We would draw a tangent at ________and then calculate the slope of the tangent using the formula: rate = _______________________________/ ___________________
Rate = _________ / _________
Rate = _______ / _______
Rate = ______________
Other Answer Choices:
30s
change in volume of oxygen
58
change in time
70-8
1.1 cm3/s
62
58-0
2
Silicon dioxide has a ___________________structure.
Silicon dioxide has a high melting point because many strong _____________ bonds need to be broken and a lot of energy is needed.
Other Answer Choices:
giant metallic
ionic
giant covalent
simple molecular
covalent
giant ionic
metallic
1
Continuous heating is needed to thermally decompose the hydrated zinc sulfate crystals.
This shows that the reaction is ________________
Other Answer Choices:
endothermic
exothermic
3
Other Answer Choices:
O2
Ar
N2
3
A bright __________ flame
The ______________________ magnesium reacts to form __________magnesium oxide.
Other Answer Choices:
silver
white
7

Classify the variable If this experimental technique was used to investigate different group 2 metal carbonates reactivates

  • Group II carbonate used
  • Volume of gas produced in 30s
  • time when volume was measured
  • amount of group 2 carbonate
  • Form of carbonate (powder / granule)
  • concentration of acid
  • Temperature of acid
  • Independent variable
  • dependent variable
  • Control variable
2
The positive result for the test is that ______________________________.
The reaction requires continued heating to occur so the reaction is ________________
Other Answer Choices:
from orange to colourless
exothermic
the limewater goes cloudy
endothermic
2
The test for chlorine is that _________litmus is bleached to __________.
Other Answer Choices:
white
damp
goes from orange to colourless
hot
1
To stop ____________ escaping.
Other Answer Choices:
CO2
HCl(aq)
HCl(g)
1

In which experiment was a lower concentration and an lower volume of gas used _________________.
In which experiment was the most concentrated acid used? _________________
In which two experiments was the total amount of acid used the same? A and _________________.
Other Answer Choices:
Experiment B
Experiment C
Experiment A
1
What is the independent variable? _________________
What is the independent variable? ______________________
Other Answer Choices:
Type of fuel
2
Other Answer Choices:
Activation energy
Energy change
4
Other Answer Choices:
long chain alkane
Alkene
Aluminium oxide catalyst
Delivery tube
1

What is the reason that ionic compounds have high boiling points?

1

What is the reason that ionic compounds can conduct electricity when molten?

1

Melting point of simple covalent substances

1

Reason why simple molecular substances do not conduct when molten