CBSE Class 7 Science Metals and Non Metals MCQs

CBSE Class 7 Science Metals and Non Metals MCQs. Multiple choice questions have become an integral part of the CBSE examination system. Almost all exams have a section for MCQs. Students are advised to refer to the attached MCQ database and practise them regularly. This will help them to identify their weak areas and will help them to score better in examination. Parents should download and give the MCQs to their children for practice.

 

1. Which of the following is not a heavy metal?
(A) Cu (B) Hg (C) Pb (D) K

2. Gold is mixed with copper to
(A) make gold soft (B) make gold hard
(C) make gold more yellowish (D) give gold lustre

3. Metal surface reacts with oxygen and the moisture present in air and get coated with
(A) oxide (B) carbonate (C) hydroxide (D) any of these

4. Eating away of metals by water, oxygen and other chemicals is called
(A) carbonisation (B) amalgamation (C) oxidation (D) corrosion

5. Rusting of iron requires the presence of
(A) air and water (B) CO2 and water (C) O2 and H2 (D) O2 and N2

6. Al forms
(A) Basic oxide (B) Amphoteric oxide (C) Acidic oxide (D) None of the above

7. Corrosion of metals can be prevented when contact between metal and_____________ is cut off.
(A) nitrogen (B) hydrogen (C) oxygen (D) carbon

8. Iron is galvanised when it is dipped in
(A) molten zinc (B) molten copper (C) molten carbon (D) molten gold

9. The process of giving a coating of__________________to copper or brass is called tinning.
(A) zinc (B) copper (C) tin (D) iron

10. Metal which reacts vigorously with HCI to produce salt and hydrogen is
(A) Na (B) Zn (C) Sn (D) Pb

11. Cu + HCl →
(A) react vigorously (B) no reaction (C) react modestly (D) react slowly

12. The nonmetal capable of gaining as well as losing an electron is
(A) Hg (B) Ca (C) Ag (D) H

13. The metal with which hydrogen reacts to form metal hydride is
(A) Hg (B) Ca (C) Ag (D) H

14. Nonmetals combine with oxygen to produce
(A) acidic oxides (B) basic oxide (C) amphoteric oxide (D) none of these

15. The oxides of nonmetal which is neutral is
(A) SO2 (B) NO2 (C) P2O3 {D)CO

16. Phosphorus combine with oxygen to form .......... types of oxides.
(A) three (B) two (C) one (D) four

17. _____________dissolves in water to produce sulphuric acid.
(A) SO2 (B) S (C) SO3 (D) 2S

18. Nonmetals + acids ® ?
(A) react slow (B) react violently (C) react moderately (D) no reaction

19. Nonmetals react with hydrogen to form
(A) covalent compounds (B) ionic compounds (C) electrovalent compounds (D) coordinate compounds

20. P4 + 6Cl2 →
(A) 2P2Cl6 (B) 4PCl3 (C) PCl6 (D) P2Cl5

21. Mercury is used in thermometers because
(A) it does not wet the glass (B) it expands on heating (C) it is a liquid (D) all of these

22. ____________ is used to make photographic films.
(A) sodium chloride (B) silver bromide (C) potassium iodide (D) copper chloride

23. A crucible used in lab to heat solid at high temperature is made of
(A) sulphur (B) silicon (C) graphite (D) phosphorus

24. The nonmetal used to treat rubber in the process of vulcanisation is
(A) sulphur (B) phosphorus
(C) carbon (D) chloride
 
25. Match–head contains
(A) N2 (B) I2
(C) P (D) C
 
26. ______________is used in the hydrogenation of vegetable oils.
(A) Cl2 (B) N2
(C) O2 (D) H2
 
27. Due to its semiconductor propertics, the nonmetal used in computers, TV, etc. is
(A) carbon (B) silicon
(C) bromine (D) fluorine
 
28. In the native state of metal, it is present
(A) as a mixture with a metal (B) in free state
(C) as a mixture with a nonmetal (D) as a mixture with a compound
 
29. Which of the following metal is present in native state?
(A) Platinum (B) Iron
(C) Potassium (D) Copper
 
30. Which of the following is called as noble metal?
(A) Mercury (B) Gold
(C) Lithium (D) Cesium
 
31. Which of the following statement is true?
(A) All minerals are ores (B) All minerals are not ores
(C) All ores are not minerals (D) Some ores are minerals
 
32. Haematite is an ore of
(A) Fe (B) Zn
(C) Cu (D) Al
 
33. Fe3O4 is the chemical formula of
(A) monazite (B) magnetite
(C) haematite (D) bauxite
 
34. Copper, which is extracted from cuprite, is a/an
(A) sulphide ore (B) carbonate ore
(C) oxide ore (D) halide ore
 
35. Which of the following is a carbonate ore of copper?
(A) Cuprite (B) Pyrite
(C) Copper glance (D) Malachite
 
36. Which of the following are the ores of zinc?
(A) Calamine and zinc blend (B) Zinc blend and cerrusite
(C) Calomine and siderite (D) Zinc blend and carnallite
 
37. The metal extracted from limestone, marble and chalk is
(A) sodium (B) Calcium
(C) Aluminium (D) iron
 
38. The chemical formula of bauxite is
(A) CaFeS2 (B) MgCO3
(C) Al2O3·2H2O (D) PbCO3
 
39. Rocksalt is
(A) KCl (B) CaCl2
(C) MgCl2 (D) NaCI
 
40. Metals generally have_________number of electrons in their valence shell.
(A) 1, 2 or 3 (B) 7, 8 or 9
(C) 10, 11 or 12 (D) 5, 6 or 7
 
41. Nonmetals contain__________number of electrons in their outmost shell.
(A) 1,2 or 3 (B) 8, 9 or 10
(C) 10, 20 or 30 (D) 5, 6 or 7
 
42. Nonmetals form
(A) cations (B) anions
(C) anions and cation (D) do not form ions
 
43. To become stable, metals
(A) lose or gain electrons (B) neither lose or gain electrons
(C) lose electrons (D) gain electrons
 
44. Metals tends to form
(A) cations (B) anions
(C) cations and anions (D) do not form ions
 
45. Antimony and arsenic belong to the category of
(A) metals (B) metalloids
(C) nonmetals (D) minerals
 
46. Nobles gases do not react because they have _________ electrons in their valence shell.
(A) 3 (B) 6
(C) 1 (D) 8
 
47. As we go down in the electrochemical series of metals, the reactivity
(A) decreases and then increases (B) increases and then decreases
(C) decreases (D) increases
 
48. The element present below hydrogen in electrochemical series is 
(A) Mg (B) Hg 
(C) Pb (D) Sn
 
49. The metal which can replace magnesium from its salt is 
(A) Ca (B) Al 
(C) Zn (D) Fe
 
50. The most reactive of the following metals is 
(A) Ca (B) Al 
(C) Ni (D) Pb
 
51. Metals can be hammered into thin sheets. This property is called 
(A) density (B) malleability 
(C) ductility (D) strength
 
52. Metals are malleable and ductile because 
(A) metals can shine 
(B) metals produce sound 
(C) layers of metal atoms can slip over each other 
(D) atoms form close clusters
 
53. Metal which is the best conductor of electricity 
(A) nickel (B) silver 
(C) gold (D) sodium
 
54. The colour of iodine is 
(A) violet (B) green 
(C) white (D) brown
 
55. The nonmetal which exhibits yellow colour is 
(A) silicon (B) phosphorus 
(C) sulphur (D) carbon  
 
56. The nonmetal which is hard is 
(A) sulphur (B) chlorine 
(C) graphite (D) diamond 
 
57. Which of the following is a property of nonmetals? 
(A) Low densities (B) Low melting points 
(C) Poor conductor of electricity (D) A11 the three 
 
58. The nonmetal which is a liquid at room temperature is 
(A) chlorine (B) nitrogen 
(C) bromine (D) hydrogen
 
59. Metal which does not react with HCI is 
(A) Ag (B) Mg 
(C) Al (D) Fe 

 

60. Metals are malleable and ductile because 
(A) Metals can shine
(B) Metals produce sound 
(C) Layers of metal atoms can slip over each other 
(D) Atoms form close clusters 

 

61. The metal which can replace calcium from its salt is 
(A) Al (B) Zn 
(C) Fe (D) K 

 

62. The most reactive of the following metals is 
(A) Ca (B) Al 
(C) Ni (D) Pb 

 

63. Which of the following elements is highly resistant to corrosion 
(A) Iron (B) Nickel 
(C) Silver (D) Titanium 

 

64. Metals can be hammered into thin sheets. This property is called 
(A) Density (B) Malleability 
(C) Ductility (D) Strength 

 

65. Metal which is the best conductor of electricity 
(A) Nickel (B) Silver 
(C) Gold (D) Sodium 

 

66. The non-metal which is hard is 
(A) Sulphur (B) Chlorine
(C) Graphite (D) Diamond 

 

67. A non-metal used to preserve food stuffs 
(A) Nitrogen (B) Phosphorus 
(C) Carbon (D) None
 
68. A metal which is liquid at room temperature is 
(A) Hg (B) Na 
(C) K (D) Al 

 

69. Which of the following statements is incorrect? 
(A) Metals have no lustre 
(B) All metal oxides are basic in nature 
(C) Metals have 1, 2 or 3 electrons in the outermost shell 
(D) Metals are malleable 

 

70. Which of the following is the second most abundant metal in the earth’s crust? 
(A) Copper (B) Aluminium 
(C) Iron (D) Zinc 

 

71. Metallurgy is a process of 
(A) extracting metal from its mineral (B) extracting metal from its ore 
(C) extracting pure metal from its ore (D) extracting metal from its pure ore 

 

72. Matrix is defined as 
(A) the unwanted foreign material present in the ore 
(B) the flux added to remove the unwanted impurities from ore 
(C) the slag formed as a result of the reaction of flux with gangue 
(D) the material used in the reduction of metal oxide to metal 

 

73. Which of the following is not an ore of aluminium? 
(A) Cryolite (B) Feldspar 
(C) Bauxite (D) Azurite 

 

74. The function of adding cryolite in the extraction of aluminium from pure alumina is 
(A) to increase the fusion temperature (B) to decrease the condcutivity of alumina 
(C) to decrease the conductivity of alumina (D) none of these
 
 
Answers for Metals and Non-Metals


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