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Class 10 Science
Metals And Non-Metals
Quiz 1
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Which of the following is not and alloy of aluminum?
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Duralumin
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Magnalium
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Alnico
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All are alloys of aluminum
German silver is an alloy of
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Cu and Ni
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Cu, Sn and Ag
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Cu,Zn and Ni
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Cu,Ni Fe and Mn
Alloys are a homogeneous mixture of
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metals only
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None of these
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metals or metals and non-metals
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non-metals only
Anode mud is obtained in which process?
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Zone refining
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Calcination
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Electrolytic refining
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Roasting
Which of the following properties is not a characteristic of metals?
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Metallic lusture
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Hardness
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High density
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Low melting and boiling point
Carnallite is
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\(KCl,MgCl_2,H_2O\)
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\(KCl,MgCl_2,3H_2O\)
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\(KCl,MgCl_2\)
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\(KCl,MgCl_2,6H_2O\)
Which of the following is most abundant metal on the earth’s crust?
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Calcium
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Iron
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Aluminum
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Oxygen
What is the decreasing order of reactivity of following metals? \(Na, \, Al,/, Cu, \, Ag, \, Fe\)
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\(K>Na>AI>Fe>Ag>Cu\)
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\(K>Na>AI>Cu>Fe>Ag\)
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\(K>Na>AI>Fe>Cu>Ag\)
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\(Na>K>AI>Cu>Ag>Fe\)
Ionic bond is formed by
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sharing of electrons
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Loss of electrons only
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Loss and gain of electrons both
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Gain of electrons only
Greenish coating that develops on copper utensils is due to formation of
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\(Cu(OH)_2 \cdot CuCO_3\)
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\(Cu(OH)_2\)
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\( CuCO_3\)
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\(CuO\)
Chemical rust is
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hydrated ferric oxide
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hydrated ferrous oxide
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only ferric oxide
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None of these
Which method is used in purification of mercury?
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Electrolytic refining
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Chemical reduction
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Liquation
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Distillation
\(Zn+H_2O\left( steam \right) \rightarrow A+B\) In the above equation \(A\) and \(B\) are
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\(ZnH_2 \text{ and } O_2\)
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\(ZnO \text{ and } H_2\)
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\(ZnO_2 \text{ and } O_2\)
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\(Zn \text{ and } H_3\)
Which of the following methods is based on the principle of the difference in the wetting properties of the ore and gangue particles with water and oil
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Magnetic separation
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Front floatation process
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Hydraulic washing
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None of these
For purification of which metal, liquation method is used?
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All of these
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Tin
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Bismuth
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Lead
Which of the following is/are oxide ore(s)?
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Bauxite
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Cuprite
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Hematite
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All of these
Octet rule was given by
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Lewis and Kossel
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Rutherford
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Soddy
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None of these
During formation of iconic bond
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There is force of attraction between positive and negative ions
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There is force of repulsion between two positive ions
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There is force of repulsion between two negative ions
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none of these
Which of the following methods is used for obtaining metals of very high purity?
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Liquation
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Distillation
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Electrolytic refining
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Zone refining
Forth floatation method is used for the concentration of
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suphate ores
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halide ores
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oxide ores
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sulphide ores
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