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MCQ question for ch-metals and non metals

Answer» Class 10 Science MCQs Chapter 3 Metals and Non-Metals1. Aluminium is used for making cooking uten¬sils. Which of the following properties of alu¬minium are responsible for the same?(i) Good thermal conductivity(ii) Good electrical conductivity(iii) Ductility(iv) High melting point(a) (i) and (ii)(b) (i) and (iii)(c) (ii) and (iii)(d) (i) and (iv)Answer2. The most abundant metal in the earth’s crust is(a) Iron(b) Aluminium(c) Calcium(d) SodiumAnswer3. The poorest conductor of heat among metals is(a) Lead(b) Mercury(c) Calcium(d) SodiumAnswerAnswer: a4. Which property of metals is used for making bells and strings of musical instruments like Sitar and Violin?(a) Sonorousness(b) Malleability(c) Ductility(d) ConductivityAnswer5. Al2O3\xa0+ 2NaOH → …… + H2O(a) Al(OH)3(b) Na2O(c) NaAlO2(d) AlNaO2Answer6. Which of the following is the correct arrange-ment of the given metals in ascending order of their reactivity?Zinc, Iron, Magnesium, Sodium(a) Zinc > Iron > Magnesium > Sodium(b) Sodium > Magnesium > Iron > Zinc(c) Sodium > Zinc > Magnesium > Iron(d) Sodium > Magnesium > Zinc > IronAnswer7. Which of the following pairs will give dis-placement reactions?(a) FeSO4\xa0solution and Copper metal(b) AgNO3\xa0solution and Copper metal(c) CuSO4\xa0solution and Silver metal(d) NaCl solution and Copper metalAnswer8. Non-metals form covalent chlorides because(a) they can give electrons to chlorine(b) they can share electrons with chlorine(c) they can give electrons to chlorine atoms to form chloride ions(d) they cannot share electrons with chlorine atomsAnswer9. Which of the following oxide(s) of iron would be obtained on prolonged reaction of iron with steam?(a) FeO(b) Fe2O3(c) Fe3O4(d) Fe2O3\xa0and Fe2O4Answer/ Explanation10. Which of tire following are not ionic compounds?(i) KCl(ii) HCl(iii) CCl4(iv) NaCl(a) (i) and (ii)(b) (ii) and (iii)(c) (iii) and (iv)(d) (i) and (iii)Answer11. The electronic configuration of three elements X, Y and Z are as follows:X = 2, 4, Y = 2, 7, Z = 2,1 Which two elements will combine to form an ionic compound and write the correct formula,(a) X2Y(b) YZ(c) XZ3


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