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WorksheetsIGCSE Chemistry Whistlestop
Total questions: 26
Worksheet time: 19mins
What is the concentration of the solution produced by adding 0.30 mol of NaCl to 0.25 dm3 of water?
Ans = _._ mol/dm3
(a)
What is the atomic number of this element?
(a)
Empirical formula is the simplest _____ ______ _____ of atoms in a compound.
(a)
In the experiment to find the empirical formula of magnesium, why must we lift the lid of the crucible when magnesium burns?
To allow MgO smoke out of the crucible
To ensure that we heat to constant mass
To check that there is a glow of burning magnesium
To allow oxygen to enter the crucible
Why, when reducing copper oxide as above, should we run the gas through before lighting it?
To remove oxygen from the tube & prevent the risk of an explosion
To prevent the oxidation of the copper
To reduce the copper oxide
To ensure the copper does not reoxidise
What is the volume of 0.125 moles of carbon dioxide in cm3?
(a)
The definition of an acid: an acid is a (a) donor
Base + acid -->
salt + hydrogen
metal oxide + hydrogen
salt + water
salt + water + carbon dioxide
Which one of these compounds, when reacted with sulphuric acids, reacts quickly initially then stops?
Copper oxide
Aluminium
Copper carbonate
Calcium carbonate
The equation H+(aq) + OH-(aq) --> H2O is the ionic equation for (a)
What are the correct formulas of the acids you need to know for IGCSE?
NiHO, SO3, ClOH
HNO3, H2SO4, HCl
HNO2, H2SO3, HCl
HNO3, HSO4, HCl
What colour is methyl orange in alkali?
Red
Orange
Yellow
Pink
Which halogen is the most reactive?
Fluorine
Chlorine
Bromine
Iodine
What colour change would you see when adding potassium iodide to bromine water?
orange --> colourless
None
colourless --> orange
orange --> brown
Which of these increase down group VII?
Reactivity
Proton number
Shielding
Distance of the outer shell from the nucleus
In the reaction between chlorine water and potassium bromide solution, which species would get oxidised?
Cl2
Br-
Br2
Br-
Which of the following conduct electricity?
Molten sodium bromide
Sodium chloride solution
Graphite
Buckminsterfullerene
Which is the best explanation for why pentane has a higher boiling point than ethane?
Pentane has more bonds, which require more energy to break.
Pentane has stronger intermolecular forces of attraction, which require more energy to overcome.
Pentane has more branching, which means its molecules don't stack together as well.
Which of the following are properties of buckminsterfullerene
Hard
Shiny
Slippery
Conducts electricity
Which of these has the highest initial rate?
Magnesium powder with 100 cm3 of 0.5 mol/dm3 hydrochloric acid
Magnesium lumps with 100 cm3 of 0.5 mol/dm3 hydrochloric acid
Magnesium powder with 200 cm3 of 0.3 mol/dm3 hydrochloric acid
Zinc powder with 200 cm3 of 0.3 mol/dm3 hydrochloric acid
If acid is the limiting reagent, which of these will produce the most hydrogen gas?
Magnesium powder with 100 cm3 of 0.5 mol/dm3 hydrochloric acid
Magnesium lumps with 100 cm3 of 0.5 mol/dm3 hydrochloric acid
Magnesium powder with 200 cm3 of 0.3 mol/dm3 hydrochloric acid
Zinc powder with 200 cm3 of 0.3 mol/dm3 hydrochloric acid
Increasing the concentration of a solution increases the number of particles per unit (a)
Increasing the concentration of a solution increases the (a) of successful collisions.
Which of these are reasons that increasing temperature increases rate?
Higher temp --> lower activation energy
Higher temp --> greater proportion of collisions with energy > activation energy
Higher temp --> increased frequency of collisions
Higher temp --> more particles available for collision
A catalyst is a substance that provides an a__________ r_______ p______ with a lower activation energy
(a)
What are the mistakes with this graph?
Reagents and products are the wrong way around
The arrow for the activation energy should be pointing upwards only
The arrow for delta H should be pointing downwards only
The y axis should be labelled delta H.
