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The table shows some information about the three states of matter. [Table_1] Which row is correct?
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Which arrow represents evaporation? [Diagram_1]
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In which states of matter does diffusion occur readily?
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579
Which statement about the boxes P, Q and R is correct?
558
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519
Which information about an element is given by its atomic number?
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The symbols represent four atoms. The letters used are \textit{not} the usual atomic symbols. $$^{40}_{20}W \hspace{1cm} ^{40}_{19}X \hspace{1cm} ^{46}_{20}Y \hspace{1cm} ^{46}_{22}Z$$ Which atoms are isotopes of the same element?
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Covalent bonds are formed when electrons are ......1...... . Most covalent compounds have ......2...... electrical conductivity. Which words correctly complete gaps 1 and 2? [Table_1]
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Which row describes the structure and a use of diamond? [Table_1]
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Which symbol equation represents the reaction between aqueous sodium hydroxide and dilute sulfuric acid?
583
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What is the relative formula mass of magnesium bromide?
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Three substances are listed.
1. solid copper
2. aqueous sodium bromide
3. solid lead(II) bromide
Which substances conduct electricity?
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Hydrogen–oxygen fuel cells can be used to power cars.
Which processes produce the fuel of a hydrogen–oxygen fuel cell?
1. the cracking of hydrocarbons
2. the electrolysis of dilute sulfuric acid
3. photosynthesis
4. the electrolysis of molten aluminium oxide
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Molten sodium sulfide, Na2S, is electrolysed using inert electrodes.
Which row identifies the product at each electrode?
[Table_1]
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The temperature of the water in two beakers, X and Y, is measured as 21.5°C.
5 g of sodium chloride is dissolved in the water in beaker X. The temperature changes to 18.0°C.
5 g of calcium oxide is dissolved in the water in beaker Y. The temperature changes to 29.4°C.
Which types of process are occurring in beakers X and Y?
[Table_1]
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Which process involves a chemical change?
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Which two pieces of apparatus are most useful to measure the rate of a reaction in which a gas is given off?
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Reaction 1 and reaction 2 both produce a gas. The total volume of gas produced in each reaction is measured every minute for 10 minutes. A graph of the results is shown. [Image_1: Graph of total volume of gas against time for reactions 1 and 2] Which row describes how the rate of reaction changes, if at all, during each reaction?
561
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554
When a few drops of water are added to a solid, E, the colour changes from blue to pink. What is E?
561
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The equation for the reaction of magnesium with copper(II) oxide is shown. $$\text{Mg} + \text{CuO} \rightarrow \text{MgO} + \text{Cu}$$ Which word describes this reaction?
535
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510
Compound M contains calcium. Two reactions of M are listed: - M reacts with dilute hydrochloric acid to form a salt and water only. - M reacts with aqueous ammonium chloride to form a gas that turns damp red litmus paper blue. What is M?
522
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The diagram shows one period of the Periodic Table. Which two elements form acidic oxides?
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A student tests four solutions with universal indicator. Which colour identifies the solution containing the greatest concentration of $\text{OH}^-\text{ ions}?$
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The following steps are done to prepare solid magnesium sulfate.
1. filtration
2. measurement of 20 cm^3 of dilute sulfuric acid using a measuring cylinder
3. evaporation
4. addition of an excess of solid magnesium carbonate to dilute sulfuric acid
What is the correct order for these steps?
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Which statement about the Periodic Table is correct?
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524
Zinc is formed when zinc oxide is heated with carbon.\n$$\text{zinc oxide + carbon} \rightarrow \text{zinc + carbon monoxide}$$\nWhich substance is oxidised in this reaction?
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Which word equation represents the rusting of iron?
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Which option describes the electronic configurations of three different elements from the same group of the Periodic Table?
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Which metal forms compounds that can be used to colour glass?
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Two properties of element R are listed. - It is a dark solid at room temperature. - It is a diatomic molecule. Where on the Periodic Table is R placed?
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Four metals, W, X, Y and Z, are tested with either cold water, steam or both. The observations are shown. [Table_1] What is the order of reactivity of the metals from the least reactive to the most reactive?
536
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Which statement about the displacement reactions of the halogens is correct?
509
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Which substances in water from natural sources are beneficial to aquatic animals? 1. metal compounds 2. plastics 3. phosphates 4. dissolved oxygen
571
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572
What are the products formed when glucose is fermented?
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Which structure represents a molecule of ethanol?
566
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Which statement describes a homologous series?
544
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What are the properties of aqueous ethanoic acid? Refer to the table below for the properties:[Table_1]
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Four different organic compounds are separated by a fractionating column. The table shows the boiling points of the compounds. The diagram shows the position in the fractionating column where they are separated.
[Table_1]
Which row identifies the compound in each fraction?
584
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Which piece of apparatus is used to measure exactly 21.50 cm^3 of dilute sulfuric acid?
544
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569
Which row shows an advantage and a disadvantage for the stated apparatus used in a titration? [Table_1]
501
578
539
Sample M contains calcium carbonate and sodium nitrate. The result of adding water to M, stirring, and filtering is shown. No chemical reaction occurs. [Image_1: Diagram showing calcium carbonate as residue and aqueous sodium nitrate as filtrate]. Which terms describe M, calcium carbonate, and aqueous sodium nitrate?
509
525
565
