When a metal react with dilute nitric acid,then hydrogen gas is not evolved.Nitric acid is a strong oxidising agent.As soon as hydrogen gas is formed in reaction between metal and dilute nitric acid,the nitric acid oxidises this hydrogen to water.Nitric acid itself is reduced to nitrogen oxides such as nitrogen monoxide,dinitrogen monoxide. Reaction of magnesium metal with dilute hydrochloric acid: Magnesium chloride and hydrogen gas are formed when magnesium reacts with dilute hydrochloric acid. Metals and Non-metals Class 10 MCQs Questions with Answers. When zinc metal reacts with dilute hydrochloric acid, the gas evolved (a) supports combustion (b) turns lime water milky (c) bums with a pop sound (d) has a pungent odour. This shows that sodium is … Mg(s) + 2HCl(aq) → MgCl2(aq) + H2(g) Metal + HNO3 → H2 not evolved. Answer Question 25. Reaction of aluminium with dilute hydrochloric acid: Aluminium chloride and hydrogen gas are formed. The ability of metals to be drawn into thin wires is known as Na & K: react violently with cold water. When zinc reacts with dilute hydrochloric acid (a) the surface of zinc becomes brighter (b) the surface of zinc becomes black and dull (c) the metal turns into powder Some metals reacts with dilute Nitric acid (HNO 3) and produces salt and any of the nitrogen oxides (N 2 O, NO, NO 2) and water. Which gas is liberated when a metal reacts with an acid? It is because HNO 3 is a strong oxidising agent. HCl) and bases (dil. Answer: Graphite (carbon) is an example of a non-metal that conducts electricity. You can refer to NCERT Solutions for Class 10 Science Chapter 3 Metals and Non-metals to revise the concepts in the syllabus effectively and improve your chances of securing high marks in your board exams. It oxidises the H 2 produced to water and itself gets reduced to any of the nitrogen oxides (N 2 O, NO, NO 2 ). Name two metals which will displace hydrogen from dilute acids and two metals which will not. The metal X reacts with dilute hydrochloric acid to form a gas Y. Name one metal which reacts with dilute hydrochloric acid to produce hydrogen gas. Temperature – warm acid solutions attack metals faster than cold solutions. Acid + Metal → Ionic compound + Hydrogen gas 14. How will you test the presence of this gas? The gas produced when metals reacts with dilute acids is: (a) nitrogen (b) carbon dioxide (c) oxygen (d) hydrogen. NaOH) by their reaction with Litmus solution (blue/red) Zinc metal Solid sodium carbonate Materials Required Test tubes, test tube stand, test tube holder, cork, droppers, boiling tube, match-box, burner, […] Answer (c) sodium Sodium reacts violently with cold water because it is high in the reactivity series. Bring a burning matchstick near to it, H 2 will burn explosively with ‘pop’ sound. For acids such as dilute hydrochloric acid and dilute sulfuric acid the general equation for their reaction with reactive metal is. Name a non-metal that conducts electricity. asked Jun 22 in Chemistry by Renu01 (52.6k points) materials; metals and non metals; class-8; 0 votes. Mg: reacts with hot water. 1 answer. Reaction with dilute Acids: Metal + Dilute Acid → Salt + H2. View Answer. Reason- HNO3 is strong oxidizing agent & oxidized H2 to water. CBSE Class 10 Science Lab Manual – Properties of Acids and Bases EXPERIMENT 2(a) Aim To study the properties of acids (dil. (CBSE 2011) Answer: Magnesium Mg + 2HCl ⇨ MgCl 2 + H 2. Surface area of the metal – powdered metals react faster than large lumps. Cold, dilute nitric acid reacts with copper to form _____ (hydrogen, nitrogen dioxide, nitric oxide). Question 27. The metal which reacts violently with cold water is: (a) zinc (b) aluminium (c) sodium (d) copper. Al, Fe, Zn react with steam to from metal hydroxide & H2. 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