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- @From the following list choose TWO alkenes: Methane, petrol, hydrogen, propene, butane & ethene.
- Ethene and propene
- Petrol and butane
- Methane and ethene
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- @Elements in the same group form compounds which have:
- Very similar formulae
- Totally different formuale
- Only slightly similar formulae
-
- @Increasing the pressure would increase which one of the following reactions reaction rates?
- NÛ + 3HÛ ï 2NHÜ
- NHÝCl ï NHÜ + HCl
- CaCOÜ ï CaO + COÛ
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- @Which one of the following changes is oxidation?
- CuÛO ï CuO
- NÛ ï NHÜ
- FeClÜ ï FeClÛ
-
- @Before river water can be used in the home it is purified by:
- filtration and chlorination
- distillation and neutralisation
- neutralisation and filtration
-
- @A car, just ticking over, does not produce which one of the following?
- Sulphur dioxide
- Water vapour
- Carbon dioxide
-
- @What volume of liquid is in the measuring cylinder?
- #cylin2
- 8 cmÏ
- 6 cmÏ
- 9 cmÏ
-
- @If a solid will dissolve in a liquid, the liquid is called a:
- Solvent
- Solute
- Solution
-
- @2Mg + ?COÛ ï 2MgO + C The number needed to balance the equation is:
- 1
- 2
- 3
-
- @When zinc oxide reacts with nitric acid (HNOÜ), which of the following is produced?
- Zinc nitrate
- Hydrogen
- Carbon dioxide
-
- @A Hoffmann voltameter is connected as shown. What is the name of the positive (+) electrode?
- #hoff
- an Anode
- a Cathode
- an Electrolyte
-
- @To break chemical bonds you:
- Give heat energy
- Remove heat energy
- Do not add or remove heat energy
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- @An element that forms crystals composed of small molecules is:
- Iodine
- Diamond
- Magnesium
-
- @Which one of the following processes involves a chemical change?
- Oxidation
- Filtration
- Condensation
-
- @The mass number for an atom is the number of:
- Protons & neutrons added together
- Protons only
- Neutrons only
-
- @In a blast furnace, which one of the following is reduced?
- Iron(III) oxide
- Carbon monoxide
- Limestone
-
- @Aircraft frameworks are usually made of:
- Aluminium
- Zinc
- Tungsten
-
- @Which one of the following would be most suitable to prepare hydrogen gas from hydrochloric acid
- Zinc
- Calcium
- Copper
-
- @The temperature diamond melts at is:
- 3550Ì
- 95Ì
- 300Ì
-
- @Which of the following is a possible source for bromine?
- Sea water
- Bauxite
- Haemetite
-
- @To make hydrogen in the lab, what two substances are usually used?
- Hydrochloric acid and zinc
- Sulphuric acid and copper
- Sodium hydroxide and magnesium
-
- @Plants use the nitrogen from fertilizers to make:
- Proteins
- Carbohydrates
- Starch
-
- @Oxides of non metals are usually:
- Acidic
- Alkaline
- Neutral
-
- @Sulphur is said to exhibit allotropy. This means that it:
- Exists in more than one solid form
- Has atoms with different numbers of neutrons in the nucleus
- Does not conduct electricity, even when molten
-
- @What is the name of this substance?
- #meth
- Methane
- Ethene
- Butane
-
- @In which period of the periodic table is the element with the relative atomic mass of 16?
- Two
- Six
- Five
-
- @Hydrogen peroxide decomposes with copper II oxide as a catalyst. At the end of the reaction:
- The mass of the copper II oxide is the same
- The hydrogen peroxide is unchanged
- The copper II oxide has totally reacted to form a new product
-
- @CuO + HÛ ï Cu + HÛO Which of the following statements is correct?
- Copper oxide is an oxidising agent
- Hydrogen is an oxidising agent
- This is no a redox reaction
-
- @Salt can be used to preserve food because
- it has a drying effect
- its helps useful bacteria grow
- it causes a chemical reaction, producing heat
-