true. Sodium losses an electron and gains a positive charge. Answer: (a) False (b) True (c) False (d) False. They lose this electron very easily, forming ions with a charge of +1. View Answer. (Less)? Which of the following statements about alkali metals is true? 5. ... Option 1 Statement ‘A’ is true, statement ‘B’ is false. The sodium atom. True. The family in the periodic table that contains the most reactive metals is the_____ answer choices . The best electrical conductor is: (a) gold (b) silver (c) copper (d) aluminium. Mark ‘T’ if the statement is true and ‘F’ if it is false. Mark ‘T’ if the statement is true and ‘F’ if it is false. 4. The alkali metals, Group 1A, are the most reactive metals because they have one valence or outer electron. False. 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. False. ( ) (b). Are alkali metals less or more dense than most elements? Mark ‘T’ If the Statement is True and ‘F’ If It is False. 30 seconds . Question 4: Mark T if the statement is true and mark F if the statement is not true. True False 3: Copper displaces zinc from zinc sulphate solution. Sodium is a very reactive metal. Question 15. 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. MCQ Questions for Class 8 Science with Answers were prepared based on the latest exam pattern. Sodium is highly reactive, forming a wide variety of compounds with nearly all inorganic and organic anions (negatively charged ions). (d) Metals react with acids to produce hydrogen gas. (b) One metal which is used to prepare hydrogen gas in the laboratory. False, metals. Distinguish between metals and non-metals on the basis of these properties. We have provided Materials: Metals and Non-Metals Class 8 Science MCQs Questions with Answers to help students understand the concept very well. Q. Q. That means a full outer electron shell or valence shell. It normally has an oxidation state of +1, and its single valence electron is lost with great ease, yielding the colourless sodium cation (Na +). During the fusion of organic compound with sodium metal, nitrogen present in the organic compound is converted into. This metal is very reactive, has properties similar to those of magnesium, and is in the same period as bromine. 4. 4. Lithium. … Free PDF Download of CBSE Class 10 Science Chapter 3 Metals and Non-Metals Multiple Choice Questions with Answers. Sodium metal is a very reactive metal. Assertion : Sodium metal is stored under Kerosene. (a) Generally, non-metals react with acids. Sodium is a very reactive metal. Click here👆to get an answer to your question ️ Sodium is more reactive than . (c) Copper displaces zinc from zinc sulphate solution. Tags: Question 6 . True or False: Group 1 elements (except ... False, 2. (d) Some non-metals are ductile. 6) Silicon and ... false. Chemistry. What yellow food is know for its good source of potassium? True. 154 views. false. Give examples of metalloids. Potassium. True. (a) Generally, non-metals react with acids. (c) Iron is more reactive than copper. Answer: Copper, aluminium, iron, silver, gold, etc. False. 4. (True)? (b) Metals are __good__ conductors of heat and __electricity__. They are very reactive with Cesium and Rubidium being the most reactive. answer choices . Alkaline Earth Metals. Oh, furthest right excluding the Noble Gases. Q. Alkali are so reactive to air they are generally stored in what? (b) Sodium is a very reactive metal true and false Get the answers you need, now! true. True. True False 4 Coal can be drawn into wires. (a) Phosphorus is a very reactive non-metal. Question 4: Mark ‘T’ if the statement is true and ‘F’ if it is false. Start studying Lab Chemistry Final Review-Ms. Coyle (ONLY DEFINITIONS AND TERMS from Chapter 6,7,8). True or false: Alkali Metals are so soft they can be cut with a knife? It is an excellent reducing agent. Other Metals. (c) Iron is __more__ reactive than copper. Sodium is a Very Reactive Metal. 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. Sodium. (a). True or False: Elements of group eight are very reactive. It has only one stable isotope, 23Na. 3. 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. Answer to: Is sodium magnetic? 30 seconds . 30 seconds . (d) Metals react with acids to produce __hydrogen__ gas. True or False: Oxidation numbers are charges (like +1 or -1) from gaining or losing electrons. Metals and Non metals. Transition Metals . We have provided Chemical Effects of Electric Current Class 8 Science MCQs Questions with Answers to help students understand the concept very well. ( ) ← Prev Question Next Question → +1 vote . Which is not a Alkali Metal? (d) A is false but R is true. Q. Tags: Question 3 . Cotton. 1. True. MCQ Questions for Class 10 Science with Answers was Prepared Based on Latest Exam Pattern. 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. Vaults. ... Q. (b) Metals are good conductors of heat and electricity. Ans: (a) False (b) True (c) False (d) False Sodium is more reactive than . SURVEY . Potassium is in the most reactive group of elements, the alkali metals, but it's not the most reactive metal within the group. Option 2 S tatement ‘B’ is false, statement ‘A’ is true. 5. (b) Sodium is a very reactive metal. True False: 2: Sodium is a very reactive metal. Learn vocabulary, terms, and more with flashcards, games, and other study tools. ( ) (b) Sodium is a very reactive metal. Name some common non-metals. It tarnishes easily and has a low melting point and density.sodium is so reactive because they lose their valence electron very easily. 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. 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. ... Answer whether the above statement is true or false. Question … In fact, so are the of the alkali metals in group I of the periodic table. True of false: Can alkali metals explode if they are exposed to water? 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. 8) Non-metals do not produce any sound when hit, which means they are not sonorous : true. Sodium. Question 2. False. Tags: Question 4 . SURVEY . [1] Reason : Metallic sodium melts when exposed to air. By signing up, you'll get thousands of step-by-step solutions to your homework questions. answer choices . The goal of any alkali metal is to lose its valence electron and attain a stable octet configuration. Besides cesium, what other alkali metal is the most reactive: francium, sodium, or lithium? Question 3. Properties of Metals and Non Metals. Sodium was first isolated by Sir Humphry Davy in 1807 by passing an electric current through molten sodium hydroxide. 10th. Oil. Ans : (c) Assertion (A) is true but reason (R) is false. 2. ( ) (b) Sodium is a very reactive metal. 3. Sodium(Na), Potassium (K) and Lithium (Li) does not occur naturally and are highly reactive metals. SURVEY . ... Metal surface reacts with oxygen and the moisture present in air and get coated with: Name some common metals. 13. ... SURVEY . Metals can be drawn into thin wires because: (a) they are sonorous (b) they are malleable (c) they are ductile (d) they are dense. Alkali Metals. (a) Generally, non-metals react with acids. Sodium reacts vigorously with ... That’s why sodium is stored in : 5) Metals react with bases, such as sodium hydroxide, to produce hydrogen gas. These are never found uncombined in nature. Statement A Sodium and potassium are highly reactive metals Statement B Sodium and potassium are stored under water . True False Some properties are listed in the following Table. 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’). True or False: Group 17 elements are highly reactive nonmetals known as HALOGENS. It is kept in kerosene to prevent it from coming in contact with oxygen and moisture present. 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 . (Francium)? (c) Generally, metals are ductile. 3. Answer: Hydrogen, oxygen, carbon, sulphur, phosphorus, etc. Calcium. ( ) Concept: Chemical Properties of Metals and Non-metals. Tags: Question 4 . 2. 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. Students can solve NCERT Class 10 Science Metals and Non-Metals Multiple Choice Questions with Answers to know their preparation level. 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