Reason- HNO3 is strong oxidizing agent & oxidized H2 to water. Name two metals which will displace hydrogen from dilute acids and two metals which will not. Bring a burning matchstick near to it, H 2 will burn explosively with ‘pop’ sound. HCl) and bases (dil. asked Jun 22 in Chemistry by Renu01 (52.6k points) materials; metals and non metals; class-8; 0 votes. The ability of metals to be drawn into thin wires is known as Name a non-metal that conducts electricity. Question 1. 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. For acids such as dilute hydrochloric acid and dilute sulfuric acid the general equation for their reaction with reactive metal is. How will you test the presence of this gas? 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 Name the metal which reacts with a very dilute HNOs to evolve hydrogen gas. 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. Gas released in the following reaction will be: Question 27. Answer (c) sodium Sodium reacts violently with cold water because it is high in the reactivity series. Surface area of the metal – powdered metals react faster than large lumps. 2Al + 6HCl ⇨ 2AlCl 3 + 3H 2. Which gas is liberated when a metal reacts with an acid? CBSE Class 10 Science Lab Manual – Properties of Acids and Bases EXPERIMENT 2(a) Aim To study the properties of acids (dil. Video Explanation. Temperature – warm acid solutions attack metals faster than cold solutions. Ca: reacts less violently. Reaction of magnesium metal with dilute hydrochloric acid: Magnesium chloride and hydrogen gas are formed when magnesium reacts with dilute hydrochloric acid. 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. Na & K: react violently with cold water. Answer This shows that sodium is … (CBSE 2011) Answer: Magnesium Question 25. Acid + Metal → Ionic compound + Hydrogen gas Cold, dilute nitric acid reacts with copper to form _____ (hydrogen, nitrogen dioxide, nitric oxide). Reaction with dilute Acids: Metal + Dilute Acid → Salt + H2. (CBSE 2011) Answer: Hydrogen gas is formed. 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. Reaction of aluminium with dilute hydrochloric acid: Aluminium chloride and hydrogen gas are formed. Answer: Graphite (carbon) is an example of a non-metal that conducts electricity. 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. Sodium reacts violently with dilute mineral acids and displaces hydrogen from them. Mg: reacts with hot water. There are a few highly reactive metals, which react with dilute acids, water, and oxygen, and include potassium, sodium, lithium, and calcium, to name a few. Metals and Non-metals Class 10 MCQs Questions with Answers. Mg + 2HCl ⇨ MgCl 2 + H 2. Question 6. The metal X also reacts with sodium. It is because HNO 3 is a strong oxidising agent. 14. It oxidises the H 2 produced to water and itself gets reduced to any of the nitrogen oxides (N 2 O, NO, NO 2 ). 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