Solution: Metals with low reactivity reacts with steam to liberate Hydrogen gas. When water is present in a sample of copper(II) sulfate it turns blue. In Bosch process the catalytic reduction of steam to hydrogen is carried out by ___ [CO2, CO, C]. 1 It reacts with steam to produce hydrogen gas. Question 14. Metal are Cu, Hg, Ag, Pt and Au. Identify M and black coloured product and also explain the reaction of M with oxygen. through which the current enters the electrolyte. Answer the following pertaining to the preparation of hydrogen by electrolysis, (a) The meaning of the term ‘electrolysis’ and ‘electrolyte’, (b) Name the electrode –, (a) Electrolysis : “Dissociation of water into hydrogen gas and oxygen gas by the passage of electric current is called electrolysis.”, Question 4. Magnesium burns in steam to produce white magnesium oxide and hydrogen gas. In general, the more reactive the … Question 2. What happens when copper oxide reacts with hydrogen gas? (ii) Question 2. … Question 2. Question 4. 1. Select the correct answer from A, B, C, D or E for each statement given below : A: Nickel B: Sodium C: Iron D: Iron [III] oxide E: Magnesium oxide, Question 1. From these results the % by mass composition of water can be worked out and itsformuladeduced. Answer: A : Nickel, Question 4. Join now. acids. The reactivity of a metal is related to its tendency to form positive ions. For example, Magnesium reacts with steam produce Magnesium oxide. 1. In the preparation of hydrogen by electrolysis of water – the distilled water used is acidified. Q.5. HCl] is not Used in the laboratory preparation of hydrogen, using zinc and an acid. The chemical formula is: zn + 2Hcl --> zncl2 + h2 2Cu + O 2 → 2CuO (Black) Question 9. Question 4. State a reason why, when hydrogen is passed over heated copper oxide, the resultant product formed, differs in colour from the original reactant. To increase the number of H+ ions distilled water is acidified and made good conductor of electricity. Water gas to hydrogen – industrially. When copper is heated strongly in air, it combines with oxygen to form Copper (II) oxide, a black oxide. When a metal reacts with HCl to release H2 gas it's a single displacement reaction. H2 + Oxygen mixture bums with explosion. This shows that hydrogen does not support combustion. Match the statements in List I with the appropriate answer in List II. It was not until much later that … Question 7. (c) Aluminium forms oxide layer on its surface which does not further react with air. Performance & security by Cloudflare, Please complete the security check to access. (a) Hydrogen gas in ‘highly inflamable’ i.e. of H2 in presence of a catalyst (finely divided iron) at 450-500°C and at 200-900 mm pressure forms basic compound ammonia [NH3] which finds applications in fertilizers and nitric acid [HNO3] and explosives. Copper is unreactive and will not react with acids to liberate hydrogen gas. Iron and aluminium are extracted from their ores in various ways. What happens when : Answer: E : Magnesium oxide. However it may react if concentrated and oxidising acids are used. (c) Chlorine acts as an oxidising/reducing agent. Steam can react with a metal and a nonmetal to liberate a product similar to liberate Hydrogen. Give necessary conditions and equations for the same. It is also known as anhydrous copper(II) sulfate because it has no water in it. Answer: The product formed on combustion of hydrogen in air is water. Hence it is redox reaction. HNO3 is not used in the laboratory preparation of hydrogen, using zinc and an acid. What is the rate law for this reaction? Magnesium has almost no reaction with cold water.It reacts slowly with hot water to give the slightly soluble magnesium hydroxide and hydrogen. Answer: C : Iron, Question 5. With reference to oxidation & reduction reaction – complete the statement given by filling in the blanks with only the words (a) Addition (b) Removal. You may need to download version 2.0 now from the Chrome Web Store. Metals below [H] do not react even with steam. Answer: Reaction of Cl2 with H2S is redox reaction as Cl2 gets reduced to HCl and H2S is oxidised simultaneously in the reaction. A foul smelling gas formed when hydrogen reacts with a molten non-metal, is ___ [hydrogen chloride, hydrogen sulphide, ammonia]. In the laboratory preparation of hydrogen from zinc & dilute hydrocholoric acid – state a reason for. The product formed on combustion of hydrogen in air is ___ [water gas, water, producer gas]. (a) Chlorine is oxidised/redcued to HCl. [The metal formed is above iron in the activity series] Answer: (a) Hydrogen bums quietly in oxygen to produce water (a neutral liquid) 2H2 + O2 → 2H20 (b) 3 volumes of H2 react with 1 vol. The metal used as a catalyst in hydrogenation of oils. Question 12. The gain in mass of the whole apparatus is equal to the mass of the hydrogen in the water. Iron reacts with superheated steam(H2O) to form hydrogen gas and the oxide Fe2O3. In the laboratory preparation of hydrogen from zinc and dilute hydrochloric acid – the zinc used granulated zinc. The metal which reacts with steam liberating hydrogen & the reaction is reversible. Free PDF Download of CBSE Class 10 Science Chapter 3 Metals and Non-Metals Multiple Choice Questions with Answers. Mammoth Chemistry Reference Periodic Table. Join now. (c) Otherwise the gas formed will escape through thistle funnel. The gas which has now replaced hydrogen in air balloons is ___ [argon, helium, neon]. Using a burning candle and a jar of hydrogen – how would you prove experimentally that (a) Hydrogen is a combustible gas (b) Hydrogen does not support combustion. The reaction between zinc and steam. Iron reacts to form i r o n ( I I , I I I ) oxide [ F e O + F e 2 O 3 ] and H 2 gas. [ Give balanced equations for each & name the product formed in each case other than hydrogen]. Answer: In Bosch process, final products are passed through caustic potash solution to separate hydrogen from the mixture. Answer: D : Iron [III] oxide, Question 3. Acidified water to hydrogen – by electrolysis. Mg (s) + H2O (g) → MgO (s) + H2(g) Metals which react with steam form the solid metal oxide and hydrogen gas. 9. Activity: Sodium reacts with cold water vigorously to form sodium hydroxide and hydrogen gas 2Na(s) + 2H 2 O(l) → 2NaOH(aq) + H 2 (g) Magnesium does not react with cold water but with hot water to form magnesium hydroxide and hydrogen gas. Answer: To obtain hydrogen using : (a) Steam : Metals above [H] in activity series of metals, i.e. Question 4. Completing the CAPTCHA proves you are a human and gives you temporary access to the web property. How many grams of H gas? Answer: Nitrogen to basic gas [NH3] – using H2. (a) Addition of traces of copper [II] sulphate to the reaction medium (b) Collecting the hydrogen by downward displacement of water and not air & collecting it after all the air in the apparatus is allowed to escape (c) Having the end of the thistle funnel dip below the level of the acid in the flask. (2012) (b) Most of the metals do not give hydrogen while reacting with nitric acid. Answer: In Bosch process the catalytic reduction of steam to hydrogen is carried out by CO [carbon monoxide]. The metallic compound used as a catalyst in Bosch process. Answer: Question 3. Answer: ‘Oxidation is a chemical reaction involving – addition of oxygen to a substance or removal of hydrogen from a substance. The reaction of chlorine with hydrogen sulphide is deemed a redox reaction. Answer: Granulated zinc contains traces of impurities which act as catalyst and increase the rate of production of hydrogen. Question 3. Answer: A foul smelling gas formed when hydrogen reacts with a molten non-metal, is hydrogen sulphide [H2S]. With reference to the uses of hydrogen, give reasons for the following : (a) Hydrogen is not used in air balloons (b) A mixture of hydrogen & oxygen on burning, find application in welding & cutting metals (c) Reaction of hydrogen with nitrogen under specific conditions finds industrial utility. Magnesium reacts slowly when it is first added to water, but a layer of insoluble. HNO3, dil. Answer: Question 2. Question 11. The metal which reacts with steam liberating hydrogen & the reaction is reversible. Metals with low reactivity react with steam to liberate hydrogen gas. Answer: When a burning splinter is brought near the gas jar containing, pure H2 bums with pale blue flame quietly. arpitachoudhary4426 arpitachoudhary4426 01.04.2020 Chemistry Secondary School What happens when copper oxide reacts with hydrogen gas? Odourless. The water gas shift reaction was discovered by Italian physicist Felice Fontana in 1780. 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