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Metals and Nonmetals-Class X -Vasu Classes
1.
What is the composition of stainless steel?
a) Fe+ Cu+C
b) Fe+Zn+Sn
c) Cu+Mn+Mg+C
d) Fe+Cr+Ni+ C
2.
Which of the following is amphoteric oxide
a) SO2
b) ZnO
c) CO2
d) NO
3.
Which set of metals is below hydrogen in reactivity series?
a) Ba ,Sn ,Ag ,Pt
b) Cu , Pt ,Au , Fe
c) Ni,Zn , Mg ,Cu
d) Hg , Au ,Pt
4.
Alloy of .......... is used in making aircraft
a) Copper
b) Silver
c) Iron
d) Aluminium
5.
Which gas is displaced by metals from water?
a) CH4
b) CO2
c) H2S
d) H2
6.
Which method is used for concentration of a sulphide ore?
a) Froth floatation
b) Hydraulic washing
c) Magnetic separation
d) chemical method
7.
Which of these is a soft metal?
a) Sodium
b) Calcium
c) Zinc
d) Iron
8.
The nature of the oxides of metals is?
a) Basic
b) Acidic
c) Both acidic and basic
d) None
9.
Metals can be beaten into thin sheets this property is called?
a) Ductility
b) Brittleness
c) Sonourousity
d) Malleability
10.
Name the metal which is kept under kerosene
a) Iron
b) Silver
c) Platinum
d) Sodium
11.
Non -metals are bad conductor but which one of these is a good conductor of electricity?
a) Sulpher
b) Nitrogen
c) Graphite
d) Diamond
12.
Which one of these are noble metals
a) K , Na
b) Au ,Pt
c) Zn , Cu
d) Sn . Fe
13.
A reaction in which a more reactive metal displaces a less reactive metal from its salt solution is called
a) Double displacement reaction
b) Single displacement reaction
c) Combination Reaction
d) Neutralization reaction
14.
A homogeneous mixture of two or more metals is called
a) Compound
b) Alloy
c) Solution
d) Solvent
15.
Which alloy is used to make the bodies of aircraft?
a) Gun metal
b) Brass
c) Duralumin
d) Stainless steel
16.
Metals produce ringing sound as they are
a) Sonorous
b) Hit ground strongly
c) Jump on the floor
d) Ductile
17.
Which one of these is quick lime?
a) Cao
b) CaCO3
c) Ca(OH)2
d) CH4
18.
A chemical reaction is balanced to satisfy
a) Law of conservation of mass
b) To make atoms equal on both sides
c) To make correct formulae on reactant side and product side
d) None
19.
This alloy is a mixtuure of Cu and Zinc
a) Gun metal
b) Duralumin
c) Alnico
d) Brass
20.
Steps of metallurgy are
a) Refining ,concentration , reduction
b) Concentration , reduction , refining
c) Reduction , refining , concentration
d) None
21.
Arrange in the decreasing order of reactivity Cu , Fe , Zn , Mg .Na
a) Na ,Mg ,Zn .Fe ,Cu
b) Fe ,Zn ,Cu ,Mg ,Na
c) Cu ,Mg ,Fe ,Na ,Zn .
d) Fe ,Na ,Zn ,Mg , Cu
22.
What is the percentage of gold in 22C
a) 92%
b) 85%
c) 70%
d) 90%
23.
Which of the option is wrong in the refining of copper
a) Pure copper strip-Anode
b) Impure copper-Anode
c) Pure copper strip-Cathode
d) Electrolyte-copper sulphate solution
24.
What is the composition of aqua regia
a) HCL-3 parts , HNO3-one parts
b) HCl-2 parts , HNO3-2 parts
c) HCl-one part , HNO3-3 parts
d) None
25.
Which of the following is the best method to prevent corrosion
a) Anodizing
b) Galvanisation
c) Alloying
d) dipping in oil
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