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Class 10 Science
Metals And Non-Metals
Quiz 3
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When a metal is added to dilute HCl solution, there is no evolution of gas. Metal is
0%
\(Zn\)
0%
\(Ag\)
0%
\(K\)
0%
\(Na\)
Heating of concentrated ore in absence of air for conversion in oxide ore in known as
0%
none of these
0%
Calcination
0%
reduction
0%
roasting
Which of the following conditions are necessary for rusting of iron?
0%
Presence of water only
0%
Presence of air only
0%
Presence of water and air both
0%
None of these
Which of the following methods is used in the concentration of haematite ore?
0%
none of these
0%
Hydraulic washing
0%
Magnetic separation
0%
Froth floatation process
Which of the following methods is suitable for preventing an iron vessel from rusting?
0%
Applying grease
0%
Applying paint
0%
Applying a coating of zinc
0%
All the above
Physical nature of most of the ionic compounds is
0%
liquid
0%
May exist in any state
0%
solid
0%
gas
Removal of impurities from ore is known as
0%
Minerals
0%
concentration of ore
0%
Crushing and grinding
0%
gangue
Ionic bond is formed between
0%
Two electro-positive elements
0%
Electropositive and electronegative elements
0%
Two electro-negative elements
0%
None of these
Which of the following methods is not used in purification of metals?
0%
Liquation
0%
Distillation
0%
None of these
0%
Calcination
\(Zn+xHCl\rightarrow ZnCl_2+Z\) In above equation \(A\) and \(x\) are
0%
\(Cl_2,1\)
0%
\(H_2,2\)
0%
\(H_2,4\)
0%
\(H_2,3\)
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