Two joining metals never melt during the welding process but only electrode melts. nonmetals lose electrons to become cations. Metals are good conductors of heat and electricity. There are more than 80 questions in the format of sets of 10 questions at a time. Gold being least reactive metal has been placed at the bottom in the series. Which of the following statement is correct about Metals Push the two pieces together, rotating them about 1/4 turn, making sure that the conduit bottoms out in the coupling. 2. 1) Their nitrates decompose on heating to give the coursponding nitrites and oxygen 2) Their chlorides are deliquescent and crystallise as hydrates 3) They react with water to form hydroxide and hydrogen 4) They readily react with halogens to form purely ionic halides, M*X- If a metal is below hydrogen in the activity series, then it will easily react with water and acids to produce hydrogen gas. Find the incorrect statements and correct them. Two statement are made. Metals are (a) shiny (b) hard (c) sonorous (d) all of these. I. Which of the following statements about metal elements is ... NCERT - Learn Chapter-wise Free NCERT Text books Statement 1: In a room containing air, heat can go from one place to another by radiation only. A. 4 Which of the following statements are correct? Which of the following statements is/are correct about the group VII (7) elements? (i) Beryllium is not readily attacked by acids because of the presence of an oxide film on the surface of the metal. Which of the following statements are correct about heavy metals? Which of the Following Statements is Correct? 00:00. Statement 2: In convection, heated molecules of a liquid themselves move to carry heat from the hot region to the cold region, A) Both statements 1 and 2 are true and statement 2 . C. Hydrochloric acid react with metals to varying degrees therefore it is stored in glass bottles. (b) All metal ox … ides react with water to give salt and acid. Some of the following statements are incorrect. Statement 1: An iron ball at \ [ { {35}^ {o}}C\]is dropped in a mug containing water at\ [305.15\text { }K\]. (a) 1 and 2 (b) 2 and 3 (c) 1 and 3 (d) 1, 2 and 3. 57. (b) Statement B is correct only. Which of the following statements are true about metals ? Hot working can eliminate imperfections and their effects, including gas pores and composition differences b. Hot-worked metals are isotropic c. Hot working is defined as plastically deforming the metallic material at a temperature below the recrystallization temperature d. (b) These are good conductors of heat and electricity. DIRECTIONS: Read the following two statements carefully and choose the correct options. Every time you will get a set of new five questions extracted from 8th science chapter 4. c. Metals can be hammered into different shapes. Which of the following statements is TRUE? (a) All metals are ductile. All metal oxides react with water to give salt and acid. A.True B.False (B) Sodium is a very reactive metal. Which of the following statements is true about hot working? The correct statement is: (a) all metals are ductile. 4. its hardness increases but strength does not increase. Which of the following statements are true about metals? Therefore, we can conclude that the statement, metals lose electrons to become cations is a true statement. All Metals Are Ductile. 2. it is worked below recrystallisation temperature. (a) All metals are ductile. Statement B is true, A is false. 19. D) All options are correct. (a) Gold ornaments were unknown. 24. . (1) Metals react by losing electrons. When two metal rods are placed in contact with each other, heat can flow from one to the other even if they are at the same temperature. Statement 2: metal lattices contain layers of positive ions. Ductility is a property where a substance can be drawn into thin wires. D) Ag(s) is the anode. d. A good oxidizing agent is a metal in a high oxidation state, such as Mn7+. 1. A (1) and (2) only. Which of the following statement about mohanjadaro is correct? Consider the following statements: When a metal or alloy is cold worked. (i) It exists as diatomic molecule. (d) Valence band may remain partially filled. 3. A. Consider The Following Statements, Choose The Incorrect One: [A]. It is a low spin complex. Answer: (d) all of these (c) Articles made of metals produce ringing sound when struck hard. Which of the following statements is/are correct for metals? (b) all non-metals are ductile. C.Most metals can be stored as a solid,a liquid,or a gas. Which of the following statements is correct? Answer. boron, silicon, germanium, arsenic, antimony, and. MCQs: Which of the following statements are true for centreless grinding? 3. The following statements about metal elements is correct: Metals show a wide range of chemical properties. Answer: (c) Explanation: Metal react with oxygen to form metal oxide. Practice here the complete NCERT Textbook Chapter 4 of class 8 Science in the form of MCQs with answers and explanation for academic session 2021-2022. A. 3. its hardness and strength increase. c. More active metals serve as positive electrodes. A) Metals have large thermal conductivities because they expand when heated. a) All metal carbonates react with acid to give salt, water, and carbon dioxide. Speed. Transcribed image text: - Choose the most correct answer for the following: 9. B. A) Cu(s) is the anode. All the questions are taken from NCERT Books for Class 7 Science only. Read the statements carefully and choose the correct alternative from the following: (a) Both the Assertion and the Reason are correct and the Reason is the correct explanation of the Assertion. All metal carbonates react with acid to give a salt, water and carbon dioxide. Which one of the following statements is INCORRECT? More active metals have greater tendencies to form ions. Question 16. 1. II. (c) Statement A and B both are correct. Class 7 Science Chapter 6 MCQ Tests for 2021-22. (a) Valence band overlaps with conduction band. Exercise. (c) generally, metals are ductile. 6. For example, zinc, arsenic, antimony, mercury are a few examples of metals that are not ductile.So, the correct option is C. | Snapsolve (iii) The gap between the valence band and the conduction band cannot be . (c) The gap between valence band and conduction band connot be determined. Which response includes all the following statements that are true, and no false statements? C. Roasting of the sulphide to the oxide is thermodynamically feasible. 05:37. D. After doing one test, click on Start a New Test for more practice. b) All metal oxides react with water to give salt and acid. (ii) The gap between valence band and conduction band is negligible. Both statements are correct, but the second statement is not a correct explanation of the first. Which of the following statements is true? Class 7 Science Chapter 6 MCQ with answers and explanations are given below. Your Answer. Metal is (any of a class of substances) characterized by high electrical and thermal conductivity as well as malleability, ductility, and high reflectivity of light. Q2) Which of the following statements is correct? (ii) The gap between the valence band and the conduction band is negligible. (iii) Deformation forces are low (B) The enthapies of atomisation of the transition metals are high (B) The transition metals generally form coloured compounds (D) Transition metals and their many compounds act as good catalyst. The correct answer is All of the above.. Key Points. ; The greater the number of shells and the lesser the number of valence electrons, the greater is the reactivity of the metal. Those metals replace other metals from its salt solution, which is . Metals can be drawn into wires. They are soft and have relatively low melting point compared to other metals. (ii) It has one electron in the outermost shell. III. (i) In case of hot working process metal is heated below the recrystallization temperature 1 point 1 point (ii) Surface finish and tolerances are inferior to cold working processes because of surface reactions (oxidation scale etc.) Both the statements A and B are false. Explanation: Generally, metals are ductile with few exceptions. (a) Statement and reason are correct. B) Oxidation occurs at the silver electrode. ; A valence shell means the outermost shell of an atom containing the valence electrons. d. Less active metals tend to behave as negative electrodes. 42. (iii) They have similar chemical properties. Gold and silver are most malleable metals. (d) Some non-metal oxides react with water to form an acid. (A) Transition metals and many of their compounds show paramagnetic behaviour. (b) Statement is wrong. A. Physics Class 7. Answer: B) Oxides of non-metals are acidic. Which of the following statement is true about brittle fracture? Refer to the Materials: Metals and Non-Metals Class 8 MCQs Questions with Answers here along with a detailed explanation. question_answer 7) Which one of the following statements is correct? They react with oxygen to form metal oxides. c) Some metals react with acids to give salt and hydrogen. Which of the following statement(s) is/are correct? Question 6. Which of the following statements is not correct? It is diamagnetic. 6H 2 0 (d) SrCl 2.4H 2 0 Sol:(a, c) Tendency to form halide hydrates gradually decreases down the group. Which of the following statements is not correct? Noble gases are at the maxima and alkali metals at the minima. The setup time for centreless grinding operation is small 3. Class 10 Science chapter 3 Metal and non-metals MCQ questions online test are given below for practice. 12. (iii) The gap between valence band and conduction band cannot be determined. Strength of welded joint is much less than strength of base metal. 3. 7. (a) All metal carbonates react with acid to give a salt, water and carbon dioxide (b) All metal oxides react with water to give salt and acid (c) Some metals react with acids to give salt and hydrogen (d) Some non metal oxides react with water to form an acid Which of the following statements are true about metals? a) All metal carbonates react with acid to give a salt, water and carbon dioxide b) All metal oxides react with water to give salt and acid c) Some metals react with acids to give salt and hydrogen d) Some non-metal oxides react with water to form an acid IV. Which of the following statement is correct? (iv) Valence band may r emain partially filled. Electrode must be always in the contact of work piece during welding. Class 12 Important Questions NCERT Science Solid . The principal reducing product is `NO` gas B. Cu metal is oxidised to `Cu^(2+)` (aq) ion which is blue in colour C. NO is paramagnetic and has one unpaired electron in antibonding molecular orbital Which of the following statements is not correct ? ; Metals are usually crystalline solids. 37. Which of the following statements gives the best explanation for the high solubility of potassium bromide? (d) Assertion is wrong statement but reason is correct statement. a. b. Choose the correct option. The ions are free to move. A solid object floats in a liquid if it is less dense than the liquid. (i) Valence band overlaps with conduction band. Is the . Choose the correct . Your Answer. The `DeltaG_(f)^(@)` of the sulphide is greater than those for `CS_(2)` and `H_(2)S` B. Statement 2: In conduction & convection, heat is transferred from one place to other by actual motion of heated material. Reason (R) : Nitrogen has completely filled p-orbital. Q.4) Statement A: All metals form basic oxides, Statement B: few non metal form neutral oxides. Which of the following statements are incorrect regarding electric arc welding. (iv) Valence band may remain partially filled. The six commonly recognised metalloids are. (c) generally, metals are ductile. B (1) and (3) only C (2) and (3) only D (1), (2) and (3) 5 Which of the following properties are related to the metal reactivity . The tangy taste of cola drinks is due to carbonic acid which is an organic acid. I) Atomic radius of Na is greater than that of Mg. II) Metallic bond in Mg is stronger than the metallic bond in Na. Which of the following statements are correct about the reaction between the copper metal and dilute `HNO_(3)`? 1. Correct statements about metal are a. a. Nutritional food additives include vitamins, minerals, and amino acids b. Statement A is true, B is false. (b) The gap between valence band and conduction band is negligible. Select the correct sequence steps when making a joint in a RNC-PVC conduit. 2. Reduction occurs at the anode b. Which of the following statements are not true for hydrogen? [C]. Nonmetals generally react by forming covalent bonds (i.e. Of these correct statements are (a) 1 and 4 (b) 1 and 3 (c) 2 and 3 Answer. (d) Both statement and reason are wrong. 16. Statement A: The lustre of a metal is due to presence of free electrons. Which of the following statements is correct? Less active metals have greater tendencies to form ions. C. Elements with high densities that can be toxic, even in a small dose Elements with high densities that readily react with other elements. sharing electrons) or by gaining electrons to form anions. (i) Valence band overlaps with conduction band. 1. （ . (b) All non-metals are ductile. The ability of metal to be drawn into thin wires is called ductility. View the full answer. Which of the following statements are true about metals. Which of the following statements are true about metals? Question 12. Assertion (A) : Ionization enthalpy of nitrogen is more than that of oxygen. Whereas non-metals are the elements which have deficiency of electrons. The requirement of wheel adjustment in centreless grinding operation is minimum 4. (iii) The gap between valence band and conduction band cannot be determined. A. Nonmetals are good conductors of electricity because little energy is required to remove the valence electrons. (a) Statement A is correct only. (c) They can be converted into wire. A. Which of the following statements is correct? Transition element are at the maxima. In the following questions two or more options may be correct. (i) BaCl 2.2H 2 O (ii) BaCl 2.4H 2 O (iii) CaCl 2.6H 2 O (iv) SrCl 2.4H 2 O; Choose the correct statements from the following. Alkali metals are at the maxima and noble gases at the minima. The ligands are weak field ligands. The hydrates are MgCl 2.6H 2 0, CaCl 2.6H 2 0, SrCl 2.6H 2 0 and BaCl 2.2H 2 0. The `DeltaG_(F)^(@)` is negative for roasting of sulphide ore to oxide. d. ) All nonmetal atoms release energy when forming a 1- anion. Metals are' reducing agents. Answer: (a) Statement and reason are correct. A steel ship will sink in seawater because its density is greater than the density of the seawater. d) Some non-metal oxides react with water to form an acid A metalloid is any chemical element which has properties in between those of metals and nonmetals, or that has a mixture of them. Statement B: Metals conducts heat. 5) Statement 1: chlorine is a liquid at . Added 12 days ago|12/3/2021 6:58:11 PM 2. Log in for more information. Which of the following statements about electrochemical cells is true? a. Questions are useful for all board like CBSE, UP Board, MP Board, and other board who are following NCERT . Which of the following statements, about the advantage of roasting of sulphide ore before reduction is not true gt A. B. (a) All metal carbonates react with acid to give a salt, water and carbon dioxide. Which of the following statements about metals and nonmetals is true? c. Fungicides are substances that can prevent and destroy fungal growth d. Most solvents are highly toxic to the immune […] Materials: Metals and Non-Metals Class 8 MCQs Questions with Answers. A. (b) Houses were made of burnt bricks . c. Some metals react with acids to give salt and hydrogen. Give more and more test to be confident in topic of metals and non-metals. (d) Some non-metals are ductile.Answer(c) Generally, metals are ductile.Ductile means which can be drawn into wiresAll metals can be drawn into wires, except Mercu Metals tend to accept electrons to form stable anions. (b) All non-metals are ductile. (iv) Valence band may remain partially filled. question 1 options: metals lose electrons to become cations. Answer : b. 4 OSWA BS ampl uestio apers CHEMISTRY las I To now about more useful boos for class11 click here (c) Assertion is correct statement but reason is wrong statement. - Many metals with hexagonal close packed (H.C.P) crystal structure commonly show brittle fracture - Brittle fracture for ductile materials is promoted at high temperature - Low temperature and high strainates favour brittle fracture Iv-Cup and cone . Minima and Maxima do not show any regular behaviour. (d) Statement A and B both are incorrect. A. C) Oxides of metals are acidic. Metallic oxides are mostly . 4. 3. C) There is no cathode for this cell. Hint: Ductile materials are used to make thin wires. (c) Generally, metals are ductile. metals gain electrons to become cations. Exercises in Materials: Metals and Non-Metals. The metal ion is a d 5 ion. Question No. ; The most abundant varieties in the Earth's crust are aluminum, iron, calcium, sodium, potassium, and magnesium. Which of the following statements is true for all the alkali metals ? Identify the correct formula of halides of alkaline earth metals from the following. E) One mole of electrons is transferred in the reaction as written. Which of the following statements regarding alkali metals is not correct? posted by Apeksha kesharwani | Which of the following statements are correct about metals? (D) Coal can be drawn into wires. 18. All metal carbonates react with acid to give a salt, water and carbon dioxide. B) metals have high electrical conductivities because the electrons in the metal are delocalized. V. It is octahedral. IV) Mg and Ca are most abundant elements among the alkaline earth metals. All metallic oxides are basic in nature. B. Inorganic acids are prepared artificially in industries and are extremely corrosive. (a) Metals are lustrous. Solution. (b) Metals are good conductor of electricity but poor conductor of heat. Metals have low electronegativity. B. B.Most metals cannnot be stored in liquid form. Correct Answer: Statement B is true, A is false. Which of the following statement about the sulphate of alkali metal is correct ? Q.5) An element belonging to 16th group of periodic table . ? Option b is incorrect because metals have high …. A.Most metals cannot be stored in solid form. A) Statement 1. done clear. . 1. 41. These MCQs are prepared from NCERT Books only. Direction (Q57 to Q61): In the following Questions, the Assertion and Reason have been put forward. Metals have high electronegativity C. Non-metals have low ionization energy. Of work piece during welding it will easily react with acid to salt! Is required to remove the valence electrons, the more readily it loses electrons then the heat will from. Electrode must be always in the metal are delocalized they are soft and have relatively low point... 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