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CBSE Papers, Questions, Answers, MCQ : Class 10

2019-4-12 · Answer: Magnesium is a reactive metal. It coines with oxygen of air to form a layer of magnesium oxide on its surface. Hence, it should be cleaned with a sand paper before burning to remove the oxide layer formed on its surface. Q20: Explain how respiration is an exothermic reaction.

RUSTING and introduction to OXIDATION & …

2018-6-20 · RUSTING and introduction to OXIDATION & REDUCTION. and GCSE/IGCSE m/c QUIZZES on metal reactivity. Foundation–tier Level (easier) multiple choice quiz on the Reactivity Series of Metals does a layer of zinc protect iron from rusting? how does a block of magnesium stop steel from rusting? explain why a more reactive metal prevents iron

How does the reactivity of metals and nonmetals …

How does the reactivity of metals and nonmetals change as the atomic nuers of the elements in a group increase? Calcium and Sodium. The properties of elements in diagonal relationships show similarities. (We will ignore the transition metals for now. metal or non-metal? Why? Why are all the elements of Group 2A less reactive than

Investigating the effect of minerals on plant growth

2019-4-17 · Class practical. All of these techniques involve a long-term project – prepared in one lesson, left for about a month (see Note 2), then with results gathered in one or more lessons after that time.There is scope for focus on the scientific methods involved in planning, controlling variables, collecting and analysing data, as well as on the biology of plant nutrient requirements.

Chemistry Form 3 Question Papers - 685

c. Explain why solid copper (ii) sulphate does not conduct electricity while it conducts in aqueous state (3mks) 6. State three uses of graphite (3mks) 7. The valencies of metal X, Y and Z are 1, 2 and 3 respectively. Write the formulae of their respective hydroxides and phosphates (6mks) 8. Explain the following observations a.

Acetylene Properties Assignment Help - Acetylene

Transtutors is the best place to get answers to all your doubts regarding the physical properties of acetylene like color, odor, solubility, boiling point and density with examples.You can submit your school, college or university level homework or assignment to us and we will make sure that you get the answers you need which are timely and also cost effective.

COLLATED QUESTIONS – REACTION RATES ANSWERS

2017-1-1 · (i) Explain why the balloon inflates. When a metal carbonate reacts with an acid, carbon dioxide gas is released. This gas causes the balloon to inflate. In a second experiment, the same mass of calcium carbonate in a powdered form is used. (ii) Explain why the balloon inflates faster when powdered calcium carbonate is used.

Madeley School - Home

School closes for the Easter break on Friday 12th April and re-opens for staff and students on Monday 29th April 2019. We have vacancies for GCSE Exam Invigilators - please contact Mrs Bonfiglio (Examinations Officer) at the school if you are interested.

Complete Chemistry for Caridge IGCSE - [PDF …

Q1 Explain why a calcium ion has a charge of 21.2 Why is the charge on an aluminium ion 31?3 Write down the syols for the ions in: a potassium chloride b calcium sulfide c lithium sulfide d magnesium fluoride4 Now work out the formula for each compound in 3.

Different Types of Chemical Reactions | S-cool, the

2019-4-13 · Examples of different reactions Decomposition: When a reactant breaks down to give two or more products, we call this type of reaction decomposition. calcium carbonate → calcium oxide + carbon dioxide Decomposition caused by heat is called thermal decomposition. Decomposition can also be caused by light. silver chloride → silver + chlorine Coination: The reverse to decomposition

Uses of slaked lime

Calcium Hydroxide (or Slaked Lime) is a strong base (as are all metal hydroxides, oxides, and carbonates) A Base is a substance with a pH of 8 or more. When an acid and a base react, the result is

Chemistry Answers - Assignment Expert

We offer the perfect solution to your struggle with chemistry. If you have a problem in any branch of chemistry, including General, Organic, Inorganic, Analytical, Physical and Macromolecular Chemistry, and Biochemistry, our experts will gladly offer their professional help. Ask your question here and get chemistry answers quickly and to the point.

Pearson Edexcel Certifie Pearson Edexcel International

metal This is the student''s method: x use the five metals aluminium, copper, iron, magnesium and zinc Explain why hydrogen has a very low boiling point. (2) 7 This question is about the reactions of calcium and some calcium compounds. (a) Calcium reacts with cold water.

Different Types of Chemical Reactions | S-cool, the

2019-4-13 · Examples of different reactions Decomposition: When a reactant breaks down to give two or more products, we call this type of reaction decomposition. calcium carbonate → calcium oxide + carbon dioxide Decomposition caused by heat is called thermal decomposition. Decomposition can also be caused by light. silver chloride → silver + chlorine Coination: The reverse to decomposition

Edexcel a Level Biology Studentbook 2 -

2017-7-31 · edexcel igcse ict student book:edexcel igcse ict Edexcel a Level Biology Studentbook 2 :4000 2 Explain why heating to this temperature

Salt preparation by titration

Salt preparation by titration method Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. If you continue browsing the site, you agree to the use of cookies on this website.

GCSE CHEMISTRY - The Reactivity of Metals with …

2017-2-21 · The Reactivity of Metals with Dilute Acid. The Reactivity Series. The Reaction of Metals with Dilute Acid.. Potassium, sodium, lithium and calcium all react violently with dilute sulfuric acid and dilute hydrochloric acid. It is dangerous to put these metals into an acid. The reaction is similar to the reaction with water, forming the metal salt (either sulfate or chloride) plus H 2(g).

O Level Chemistry – Types of Oxides - …

This is another section in O Level Chemistry where students find it tough to comprehend. Lets reveal the Secrets here. An oxide is a compound of Oxygen and another element (e.g. through the process of Coustion) ? Metals form Metal Oxides and Non-Metals form Non-Metal Oxides ? Oxides can be…

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What is the chemical reaction of zinc and copper (II

What is the chemical reaction of zinc and copper (II) sulfate? This tool looks for lower prices at other stores while you shop on Amazon and tells you where to buy. (II) sulfate, it precipitate copper metal and the zinc metal was dissolved in the solution of copper sulfate to form zinc sulfate.

e Learning for Online Courses like UPSC, , GMAT, …

2019-4-20 · BYJU’S is the world’s most valued Ed-Tech company and the creator of the most loved school-learning app in India. Launched in 2015, BYJU’S offers highly personalised, engaging and effective learning programs for students in classes 4-12(K-12), and aspirants of competitive exams like JEE, , GMAT, IAS and GRE.

IRON AND STEEL - chemguide

2019-4-20 · This page looks at the use of the Blast Furnace in the extraction of iron from iron ore, and the conversion of the raw iron from the furnace into various kinds of steel. The common ores of iron are both iron oxides, and these can be reduced to iron by heating them with carbon in the form of coke

Complete Chemistry for Caridge IGCSE - [PDF …

Q1 Explain why a calcium ion has a charge of 21.2 Why is the charge on an aluminium ion 31?3 Write down the syols for the ions in: a potassium chloride b calcium sulfide c lithium sulfide d magnesium fluoride4 Now work out the formula for each compound in 3.

How does the reactivity of metals and nonmetals …

How does the reactivity of metals and nonmetals change as the atomic nuers of the elements in a group increase? Calcium and Sodium. The properties of elements in diagonal relationships show similarities. (We will ignore the transition metals for now. metal or non-metal? Why? Why are all the elements of Group 2A less reactive than

GCSE Chemistry Question and Answers 2015 - S-cool The

2015-6-3 · GCSE Chemistry Question and Answers 2015 . 2 Table of Contents Answer outline and marking scheme for question: 3 a) = calcium nitrate + carbon dioxide + water (1 mark) b) Write an equation to show how aluminium ions are changed in to aluminium metal. (2 marks) c) Why can''t the blast furnace be used to make aluminium? (1 mark) (Marks

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