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