Statement A Sodium and potassium are highly reactive metals Statement B Sodium and potassium are stored under water . Mark ‘T’ if the statement is true and ‘F’ if it is false. Tags: Question 4 . … True False 4 Coal can be drawn into wires. answer choices . This metal is very reactive, has properties similar to those of magnesium, and is in the same period as bromine. (d) Metals react with acids to produce __hydrogen__ gas. ... Answer whether the above statement is true or false. It has only one stable isotope, 23Na. (a) Phosphorus is a very reactive non-metal. From among the set of metals — sodium, zinc, iron, copper, silver, select the following giving equations for each reaction : (a) Two metals which will liberate hydrogen from water. Sodium reacts vigorously with ... That’s why sodium is stored in : 5) Metals react with bases, such as sodium hydroxide, to produce hydrogen gas. By signing up, you'll get thousands of step-by-step solutions to your homework questions. Sodium reacts with water to evolve hydrogen which immediately catches fire. 13. 1. answer choices . ... Q. (b) Sodium is a very reactive metal true and false Get the answers you need, now! (a) Generally, non-metals react with acids. For example, when manganese dioxide is heated with aluminium powder, manganese dioxide is reduced to metallic manganese while aluminium gets oxidized to aluminium trioxide. True. (b) Sodium is a very reactive metal. Sodium. Besides cesium, what other alkali metal is the most reactive: francium, sodium, or lithium? If true enter 1, else enter 0. Question 4: Mark ‘T’ if the statement is true and ‘F’ if it is false. (b) One metal which is used to prepare hydrogen gas in the laboratory. 154 views. SURVEY . Sodium is a very reactive metal. You can refer to NCERT Solutions for Class 8 Science Chapter 4 Materials: Metals and Non-Metals to revise the concepts in the syllabus effectively and improve your chances of securing high marks in your board exams. 3. ( ) … false. Question 4: Mark T if the statement is true and mark F if the statement is not true. ( ) (b) Sodium is a very reactive metal. Mark ‘T’ If the Statement is True and ‘F’ If It is False. ( ) Concept: Chemical Properties of Metals and Non-metals. It is an excellent reducing agent. Sodium was first isolated by Sir Humphry Davy in 1807 by passing an electric current through molten sodium hydroxide. Sodium is a soft, silvery white, highly reactive element and is a member of the alkali metals within "group 1" (formerly known as ‘group IA’). Tags: Question 3 . Q. true. MCQ Questions for Class 10 Science with Answers was Prepared Based on Latest Exam Pattern. True or false: Alkali Metals are so soft they can be cut with a knife? (c) Generally, metals are ductile. Ans: (a) False (b) True (c) False (d) False Calcium. 5. Answer to: Is sodium magnetic? (d) A is false but R is true. 8) Non-metals do not produce any sound when hit, which means they are not sonorous : true. As a general rule, elements in the furthest two columns to the right and the left of the periodic table are going to be the most reactive elements. Tags: Question 4 . Answer: Hydrogen, oxygen, carbon, sulphur, phosphorus, etc. (c) Iron is more reactive than copper. (c) Copper displaces zinc from zinc sulphate solution. Option 2 S tatement ‘B’ is false, statement ‘A’ is true. True or False: Group 17 elements are highly reactive nonmetals known as HALOGENS. We have provided Chemical Effects of Electric Current Class 8 Science MCQs Questions with Answers to help students understand the concept very well. True. Check the below NCERT MCQ Questions for Class 8 Science Chapter 14 Chemical Effects of Electric Current with Answers Pdf free download. Sodium(Na) and Potassium (K) quickly undergoes reaction with air or H2O (water or moisture) and burn violently and can explode, so it must be stored in an inert medium such as an inert liquid hydrocarbon (example: kerosene) as moisture cannot enter in it. Potassium. Which is not a Alkali Metal? false. It normally has an oxidation state of +1, and its single valence electron is lost with great ease, yielding the colourless sodium cation (Na +). True. View Answer. Which of the following statements about alkali metals is true? Question 15. Alkaline Earth Metals. In fact, so are the of the alkali metals in group I of the periodic table. During the fusion of organic compound with sodium metal, nitrogen present in the organic compound is converted into. Properties of Metals and Non Metals. Assertion : Sodium metal is stored under Kerosene. True or False: Oxidation numbers are charges (like +1 or -1) from gaining or losing electrons. Vaults. False. Sodium is more reactive than . (a). False, metals. 4. Transition Metals . Click here👆to get an answer to your question ️ Sodium is more reactive than . Gold. Ans : (c) Assertion (A) is true but reason (R) is false. (Francium)? MCQ Questions for Class 8 Science with Answers were prepared based on the latest exam pattern. 4. Q. Metals and Non metals. 4. The best electrical conductor is: (a) gold (b) silver (c) copper (d) aluminium. Other Metals. Q. Alkali are so reactive to air they are generally stored in what? Metals can be drawn into thin wires because: (a) they are sonorous (b) they are malleable (c) they are ductile (d) they are dense. Answer: (a) False (b) True (c) False (d) False. They lose this electron very easily, forming ions with a charge of +1. ( ) (b). Cotton. 5. Sodium is more abundant and easier to obtain. Sodium, like all the Group 1 metals, is very reactive because it wants to achieve what is called an inert gas electron configuration. Sodium is highly reactive, forming a wide variety of compounds with nearly all inorganic and organic anions (negatively charged ions). Sodium is highly reactive metal. Answer: Copper, aluminium, iron, silver, gold, etc. Tags: Question 6 . Name some common metals. Are alkali metals less or more dense than most elements? Chemistry. Highly reactive metals such as sodium, calcium, aluminium, etc., are sometimes used as reducing agents because they can displace metals of lower reactivity from their compounds. True. Sodium is a very reactive metal. (Less)? ... Metal surface reacts with oxygen and the moisture present in air and get coated with: SURVEY . False. True. Name some common non-metals. Learn vocabulary, terms, and more with flashcards, games, and other study tools. (True)? (d) Some non-metals are ductile. Sodium is a Very Reactive Metal. (d) Metals react with acids to produce hydrogen gas. It is kept in kerosene to prevent it from coming in contact with oxygen and moisture present. Question 3. Question … 30 seconds . These are never found uncombined in nature. ( ) ← Prev Question Next Question → +1 vote . (b) Metals are __good__ conductors of heat and __electricity__. Start studying Lab Chemistry Final Review-Ms. Coyle (ONLY DEFINITIONS AND TERMS from Chapter 6,7,8). Sodium metal is a very reactive metal. Q. 6) Silicon and ... false. The family in the periodic table that contains the most reactive metals is the_____ answer choices . 30 seconds . The alkali metals, Group 1A, are the most reactive metals because they have one valence or outer electron. Sodium reacts with oxygen in air at room temperature to form sodium oxide. It is not true; many metals are very reactive and several nonmetals are nonreactive. True. (a) Generally, non-metals react with acids. Question 2. 30 seconds . SURVEY . 3. asked Nov 12, 2017 in Chemistry by jisu zahaan (29.7k points) Mark 'T' if the statement is true and 'F' if it is false. ... Option 1 Statement ‘A’ is true, statement ‘B’ is false. Sodium is a very reactive metal. True or False: Elements of group eight are very reactive. Free PDF Download of CBSE Class 10 Science Chapter 3 Metals and Non-Metals Multiple Choice Questions with Answers. true. Lithium. True False Some properties are listed in the following Table. Students can solve NCERT Class 10 Science Metals and Non-Metals Multiple Choice Questions with Answers to know their preparation level. Ans 4: (a) Generally, non-metals react with acids (b) Sodium is a very reactive metal (c) Copper displaces zinc from zinc sulphate solution (d) Coal can be drawn into thin wires . That means a full outer electron shell or valence shell. (b) Metals are good conductors of heat and electricity. True or False: Group 1 elements (except ... False, 2. Sodium losses an electron and gains a positive charge. They are very reactive with Cesium and Rubidium being the most reactive. Materials: Metals and Non-Metals Class 8 Extra Questions Science Chapter 4 Materials: Metals and Non-Metals Class 8 Extra Questions Very Short Answer Questions Question 1. Answer: Explanation: As a part of the alkali metal group in the periodic table, sodium is highly reactive and is never found pure in nature. False. Distinguish between metals and non-metals on the basis of these properties. ( ) (b) Sodium is a very reactive metal. (a) Generally, non-metals react with acids. Alkali metals like sodium only have one valence electrons so they tend to donate this electron to nonmetals in order to achieve stability. (d) Coal can be drawn into wires. True False: 2: Sodium is a very reactive metal. (c) Iron is __more__ reactive than copper. True False 3: Copper displaces zinc from zinc sulphate solution. The sodium atom. Give examples of metalloids. False. Water. True. ... SURVEY . 10th. The goal of any alkali metal is to lose its valence electron and attain a stable octet configuration. True of false: Can alkali metals explode if they are exposed to water? Alkali Metals. Sodium. [1] Reason : Metallic sodium melts when exposed to air. 3. Mark ‘T’ if the statement is true and ‘F’ if it is false. 2. What yellow food is know for its good source of potassium? It tarnishes easily and has a low melting point and density.sodium is so reactive because they lose their valence electron very easily. Oil. Sodium(Na), Potassium (K) and Lithium (Li) does not occur naturally and are highly reactive metals. Generally, non-metals react with acids. Oh, furthest right excluding the Noble Gases. 2. 4. Potassium is in the most reactive group of elements, the alkali metals, but it's not the most reactive metal within the group. We have provided Materials: Metals and Non-Metals Class 8 Science MCQs Questions with Answers to help students understand the concept very well. Ncert mcq Questions for Class 8 Science with Answers sodium losses an electron and attain a octet. 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