Question

Answer the following questions: 1. Identify the component oxidizedand the component reduced in the following reaction: H2S + Cl2  S + 2HCl [Knowledge] a) If both assertion and reason are true and the reason is the correct explanation of the assertion. b) If both the assertion and reason are true but the reason is not the correct explanation of the assertion. c) If assertion is true but reason is false. d) If both assertion and reason are false. 2. Assertion: Magnesium ribbon should be cleaned before burning in air. [Applying] Reason: Magnesium ribbon is coated with a thin layer of dust containing moisture. 3. Assertion: Copper reacts with silver nitrate solution. Reason: Copper is placed higher in the metal activity series than silver. Thus, it can displace silver from silver nitrate solution[Knowledge] 4. 2 g of ferrous sulphate crystals were heated in a hard glass test tube and observations recorded. a. What type of odour is observed on heating ferrous sulphate crystals? b. Name the products obtained on heating ferrous sulphate crystals. c. What type of reaction is taking place.[Knowledge] 5. Write an equation each for decomposition reactions, where energy is supplied in the form of heat, light or electricity.[Understanding] 6. Which of the following listed metals can displace zinc from its salt solution? Give reason for your answer with a chemical equation: Copper, Lead, Magnesium, Silver[Analysing] 7. A shiny brown coloured element X’ on heating in air becomes black in colour. Name the element X’ and the black compound formed.[Applying]8. Name the type of chemical reaction presented by the following equations and balance them. i. CaCO3 CaO + CO2 ii. CaO + H2O Ca(OH)2 iii. Zn + H2SO4ZnSO4 + H2[Understanding] 9. Identify ‘x ’ in the following reaction: 2AgCl(s) x 2Ag(s) +Cl (g)[Understanding] 10. What happens when lead nitrate is heated? Write the equation involved.[Knowledge]​

Answer 1

Answer:

H2o

is the answer

Explanation:

×_×

The process by which a substance moves from the liquid state to the gaseous state is called boiling. The temperature at which a liquid begins to boil is called the boiling point (bp). The bp is dependent on atmospheric pressure, but for water at sea level, it's 212°F, or 100°C.

Answer 2

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Oxidation state indicates the degree of oxidation for an atom in a chemical compound; it is the hypothetical charge that an atom would have if all bonds to atoms of different elements were completely ionic. Oxidation states are typically represented by integers, which can be positive, negative, or zero. In some cases, the average oxidation state of an element is a fraction, such as 8/3 for iron in magnetite (Fe3O4).

The highest known oxidation state is +8 in the tetroxides of ruthenium, xenon, osmium, iridium, hassium, and some complexes involving plutonium; the lowest known oxidation state is −4 for some elements in the carbon group.

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