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Elements and Compounds Metals and non-metals, Atoms and molecules
70. Copper, iron, gold, and aluminium are all examples of what?
71. SALTY WATER is best described as....
72. What kind of substance is air
73. Name a non-metallic element that conducts electricity
74. Sodium chloride is the chemical name for
75. Name one of the only two liquid elements
76. What is the chemical symbol for iron?
77. What is the chemical symbol for magnesium?
78. Cu is the symbol for which chemical element
79. C is the symbol for which chemical element
80. Ca is the symbol for which chemical element
81. He is the symbol for which chemical element
82. Pencils are sometimes called 'Lead pencils' even though the lead has been replaced by which substance?
83. Sucrose is the chemical name for which common substance?
84. What atoms is diamond made out of?
85. Which of the following is NOT a metal
86. Which of the substances listed below is the odd one out?
87. Which of the properties of metals listed below is not correct?
88. helium is an example of an
89. What colour is sulphur?
90. If a chemical is inert what does this tell you about it?
91. Is water an element compound or mixture?
92. Pick an element from the list shown
93. What is the chemical symbol for gold?
94. Fom the list of properties below pick the one which describes a non-metallic element:
95. If a substance contains only one kind of atom it is most likely to be
96. You have four substances which you label A, B, C and D.
One is a mixture, one a metallic element one a non-metallic element and one a compound.
They have the following properties:
A A yellow, crumbly solid that burns to form a single colourless gas which turns universal indicator red B A grey, malleable solid that burns to form a single white alkaline oxide C A colourless liquid. The liquid is warmed in a shallow dish and after a few minutes a white residue is seen D A green solid that decomposes when heated to form a colourless gas and leave a black powder
Which of the substances is likely to be a
non-metallic element ?
97. You have four substances which you label A, B, C and D.
One is a mixture, one a metallic element one a non-metallic element and one a compound.
They have the following properties:
A A yellow, crumbly solid that burns to form a single, colourless gas which turns universal indicator red. B A grey, malleable solid that burns to form a single, white, alkaline oxide. C A colourless liquid. The liquid is warmed in a shallow dish and after a few minutes a white residue is seen. D A green solid that decomposes when heated to form a colourless gas and leave a black powder.
Which of the substances is likely to be a
metallic element ?
98. You have four substances which you label A, B, C and D.
One is a mixture, one a metallic element one a non-metallic element and one a compound.
They have the following properties:
A A yellow, crumbly solid that burns to form a single, colourless gas which turns universal indicator red. B A grey, malleable solid that burns to form a single, white, alkaline oxide. C A colourless liquid. The liquid is warmed in a shallow dish and after a few minutes a white residue is seen. D A green solid that decomposes when heated to form a colourless gas and leave a black powder.
Which of the substances is likely to be a
compound ?
99. You have four substances which you label A, B, C and D.
One is a mixture, one a metallic element one a non-metallic element and one a compound.
They have the following properties:
A A yellow, crumbly solid that burns to form a single, colourless gas which turns universal indicator red. B A grey, malleable solid that burns to form a single, white, alkaline oxide. C A colourless liquid. The liquid is warmed in a shallow dish and after a few minutes a white residue is seen. D A green solid that decomposes when heated to form a colourless gas and leave a black powder.
Which of the substances is likely to be a
mixture ?
100. What is the approximate number of elements?
101. What is the approximate number of elements?
102. What is the chemical formula for SALT (sodium chloride)?
103. What colour is copper sulphate?
104. What is the chemical formula for CHALK (calcium carbonate)?
105. What colour is magnesium oxide?
106. How many elements are present in the compound calcium carbonate?3
107. What colour is copper carbonate?
108. What is the name of the chemical which has the formula CH4 ?
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Separating mixtures solutions Solubility, solutions, saturated solution, effect of temperature, filtration, evaporation, simple distillation, factional distillation, soluble, insoluble, solute, solvent
144. Which is the best way to get the salt back from some salty water
145. The best way to separate sand from iron filings is
146. The best way to remove sand from water is
147. Some salt is dissolved in warm water.
148. Tim mixed four different chemicals with water.
149. Jane has two bowls on her bench.
150. What happens to sugar when you stir it into a cup of tea?
151. Name the PROCESS you would use to obtain a sample of SOLID SALT from some sea water
152. What process would be best used to obtain pure water from sea water?
153. A boy dissolved some salt in warm water. What do we call the resulting mixture?
154. Some copper foil is heated in a sealed test tube until the copper stops changing colour. What gas remains in the test tube?
155. Flour is INSOLUBLE in water. When flour is shaken with water what will it form?
156. In a solution of salty water, the salt is called the
157. How can alcohol be obtained from wine?
158. What process would be used to obtain the solvent from a solution?
159. What process would be used to obtain the solute from a solution?
160. What process would you use to remove the flour from a suspension of flour in water?
161. Which of the following would you use filtration
162. Peter has three coloured felt pens which he labelled A, B and C.
He used the apparatus below to separate the dyes used to make colours from each of the pens.
What is the name of the process being carried out?
163. Peter has three coloured felt pens which he labelled A, B and C.
He used the apparatus below to separate the dyes used to make colours from each of the pens.
Which pen has an ink made from 4 dyes mixed together?
164. Look at the graph below which shows the solubility of 3 substances in water at diferent temperatures
How many grams of solute A dissolves in 100g of water at 70°C?
165. Look at the graph below which shows the solubility of 3 substances in water at diferent temperatures
Which substance does the temperature of the water have the least effect on the solubility?
166. Look at the graph below which shows the solubility of 4 substances in water at diferent temperatures
Which substance is most likely to be a gas?
167. Look at the graph below which shows the solubility of 3 substances in water at diferent temperatures
How is the solubility of substance B effected by temperature?
168. Put the following processes into the correct order if you wished to obtain pure salt from rock salt
169. After filtering a mixture what do we call the liquid that drips through the filter paper?
170. Crude oil can be separated into different substances using what method of separation?
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Useful reactions and equations Types of chemical change: decomposition, oxidation, burning
preparation of co2, H2 and O2
Word equations
201. Which of the following are examples of chemical changes
202. Which of these is a chemical change?
203. Which of these changes is not reversible
204. Name the two products when magnesium reacts with zinc oxide
205. The decomposition of a liquid by passing an electric current through it is known as
206. How is carbon dioxide made in the laboratory?
207. When a substance was burnt it was found to form carbon dioxide and water as products of combustion.
208. What solid is formed when limestone is heated?
209. Why does iron go a pinky-brown when it touches copper sulphate solution?
210. Word equations for 4 different reactions are shown.combustion
211. Word equations for 4 different reactions are shown.displacement
212. Word equations for 4 different reactions are shown.oxidation and reduction
213. What is the word equation for the reaction between copper and oxygen
214. What is the word equation for the thermal decomposition of copper carbonate
215. Which of the below is not
216. Powdered wood charcoal (carbon) is mixed with copper oxide and heated strongly.Name the two products of this reaction.
217. Burning magnesium will react with carbon dioxide to produce a white smoke and leave small black specks of carbon.What would be the products of the reaction between magnesium and carbon dioxide gas?
218. Powdered wood charcoal (carbon) is mixed with copper oxide and heated strongly.During this reaction, which chemical is being oxidised and which is being reduced?
219. What is the test for oxygen gas?
220. What is the test for hydrogen gas?
221. What is the test for carbon dioxide gas?
222. What compound would be formed when copper combines with sulphur?
223. What would be the product when water is added to anhydrous copper sulphate?
224. Wax is a compound of hydrogen and carbon (known as hydrocarbon).How many products would be formed when wax burns?
225. Wax is a compound of hydrogen and carbon (known as hydrocarbon).What are the products of the reaction that takes place when wax burns completely in air.
226. The word equation below shows the reaction between iron and copper sulphate solutionIron + copper sulphate → ******** + iron sulphate What is the missing chemical from the equation?
