NTSE SAT Chemistry - Metals and Non-Metals
Exam Duration: 45 Mins Total Questions : 30
Identify the correct statement.
- (a)
Cryolite is an ore of mercury
- (b)
Sulphide ores are-converted into oxide by the process of calcination
- (c)
Zinc oxide is reduced to metallic zinc using carbon as reducing agent
- (d)
The impurities associated with ore are called flux
The suitable method to prevent corrosion of iron containers which are used to preserve edible food materials like meat and vegetables is
- (a)
Galvanization
- (b)
Tinning
- (c)
Painting
- (d)
All the above
The oxide which reacts with acids as well as bases is
- (a)
Na2O
- (b)
CuO
- (c)
MgO
- (d)
ZnO
The element which can be cut with a knife
- (a)
Potassium
- (b)
Aluminium
- (c)
Magnesium
- (d)
Iron
Of these, the most ductile metal is ______________
- (a)
Al
- (b)
Au
- (c)
Cu
- (d)
Ag
What is not true about roasting?
- (a)
to convert sulphides into oxides
- (b)
to remove volatile impurities
- (c)
to dry the ore
- (d)
to convert the ore into fine powder
A non-metallic oxide which is neutral in nature is:
- (a)
CO2
- (b)
CO
- (c)
P2O5
- (d)
None of these
The metals that produce ringing sounds, are said to be:
- (a)
Malleable
- (b)
Sonorous
- (c)
Lustrous
- (d)
Hard
When a metal is added to dilute HC! solution, there is no evolution of gas. Metals is
- (a)
K
- (b)
Na
- (c)
Ag
- (d)
Zn
During formation of ionic bond
- (a)
there is force of repulsion between two negative ions
- (b)
there is force of repulsion between two positive ions
- (c)
there is force of attraction between positive & negative ions
- (d)
none of these.
Which of the following is most abundant metal on the earth's crust?
- (a)
Iron
- (b)
Aluminum
- (c)
Calcium
- (d)
Oxygen
Process of roasting and calcination takes place in
- (a)
bessemer converter
- (b)
blast furnace
- (c)
reverberatory furnace
- (d)
electrolytic cell
For purification of which metal, liquation method is used?
- (a)
Tin
- (b)
Lead
- (c)
Bismuth
- (d)
All of these
Which of the following methods is used for obtaining metals of very high purity?
- (a)
Distillation
- (b)
Zone refining
- (c)
Liquation
- (d)
Electrolytic refining
In thermite process reducing agent is
- (a)
C
- (b)
Cl
- (c)
Al
- (d)
None of these
Which of the following methods is suitable for preventing an iron vessel from rusting?
- (a)
Applying grease
- (b)
Applying paint
- (c)
Applying a coating of zinc
- (d)
All the above
A metal used in thermometer is
- (a)
Hg
- (b)
Ca
- (c)
Na
- (d)
None
Element which is present in native state is
- (a)
Iron
- (b)
Calcium
- (c)
Copper
- (d)
Platinum
Which of the following elements undergoes rusting
- (a)
Iron
- (b)
Nickel
- (c)
Silver
- (d)
Titanium
Amphoteric oxide is
- (a)
Na2O
- (b)
MgO
- (c)
ZnO
- (d)
CaO
Silver article turns black after a period of time due to formation of:
- (a)
Silver nitrate
- (b)
Silver sulphide
- (c)
Silver oxide
- (d)
Silver chloride
22 - carat gold is a mixture of :
- (a)
Au and Cu
- (b)
Zn and Au
- (c)
Al and Au
- (d)
Mg and Au
A metal which is stored in kerosene oil is
- (a)
Pb
- (b)
Al
- (c)
Cu
- (d)
Na
Which of the following is a carbonate ore of copper?
- (a)
Cuprite
- (b)
Pyrite
- (c)
Copper glance
- (d)
Malachite
The metal which can be extracted from limestone, marble and chalk is
- (a)
Na
- (b)
Al
- (c)
Ca
- (d)
Fe
Concentration of Bauxite ore is done by
- (a)
Hydraulic washing
- (b)
Chemical concentration
- (c)
Distillation
- (d)
Liquation
The process of giving a coating of __________ to copper or brass is called tinning.
- (a)
Zn
- (b)
Cu
- (c)
Sn
- (d)
Fe
The metal with which hydrogen reacts to form metal hydride is
- (a)
Hg
- (b)
Ca
- (c)
Ag
- (d)
Au
Which of the following is called as noble metal?
- (a)
Mercury
- (b)
Gold
- (c)
Lithium
- (d)
Cesium
Metals combine with oxygen to form __________ oxides.
- (a)
acidic
- (b)
basic
- (c)
amphoteric
- (d)
none
