Chemistry - Metals and Their Compounds
Exam Duration: 60 Mins Total Questions : 30
Statement I Chlorine radicals CL initiate the chain reaction for ozone depletion.
Statement II Gaseous hypochlorous acid and chlorine photolysed by sunlight.
- (a)
Both the Statements are true and Statement II is the correct explanation of Statement I
- (b)
Both the Statements are true and Statement II is not the correct explanation of Statement I
- (c)
Statement I is true, but Statement II is false
- (d)
Statement I is false, but Statement II is true
Solder is an alloy of
- (a)
tin and lead
- (b)
tin and copper
- (c)
tin, copper and Zinc
- (d)
tin, lead and zinc
Which one of the following element is alloyed with iron to produce steel which can resist high temperatures and also have high hardness and abrasion resistance?
- (a)
Aluminium
- (b)
Chromium
- (c)
Nickel
- (d)
Tungsten
The most abundant metal in the earth's crust is
- (a)
Si
- (b)
Fe
- (c)
AL
- (d)
Cu
Consider the following statements
1. The carat is a unit of purity for gold alloys.
2.18 carat gold is 24 parts gold and 6 parts another metal.
Which of the statements given above is/are correct?
- (a)
Only 1
- (b)
Only 2
- (c)
Both 1 and 2
- (d)
Neither 1 not 2
Which one of the following elements cannot displace hydrogen gas from a dilute acid?
- (a)
Zinc
- (b)
Copper
- (c)
Magnesium
- (d)
Iron
An example of an oxide ore is
- (a)
bauxite
- (b)
malachite
- (c)
Zinc blende
- (d)
galena
Which one of the following is the softest metal?
- (a)
Sodium
- (b)
Aluminium
- (c)
Iron
- (d)
Copper
Which one of the following is not an ore?
- (a)
Bauxite
- (b)
Pig iron
- (c)
Malachite
- (d)
Zinc blende
Which one of the following is a true statement regarding calcination?
- (a)
The ore is heated strongly in the absence of any blast of air
- (b)
The ore is heated with calcium
- (c)
The ore is heated with carbon
- (d)
The mineral is melted with limestone
Match Column I with Column II
Column I(Mineral) | Column II(Industries in which largely used) |
A.Limestone | 1.Cement |
B.Copper | 2.Electrical goods |
C.Bauxite | 3.Manufacture of aeroplanes |
D.Manganese | 4.Steel |
- (a)
A B C D 1 2 3 4 - (b)
A B C D 2 3 4 1 - (c)
A B C D 3 4 1 2 - (d)
A B C D 4 1 2 3
Stainless steel contains
- (a)
Fe+Cr+Ni
- (b)
Fe+Ni+Cu
- (c)
Fe+Cr+Cu
- (d)
Fe+C+Ni
Dead burnt is
- (a)
anhyrous Na2SO4
- (b)
Na2CO3 which is useful for softening.
- (c)
CaSO4 which is not useful for softening.
- (d)
anhydrous CuSO4
Which of the following is used in making ointment for curing skin disease?
- (a)
ZnCO3
- (b)
ZnSO4
- (c)
ZnO
- (d)
ZnS
In the metallurgy of iron, when CaCO3 is added to blast furnace, calcium ion appears as
- (a)
CaO
- (b)
metallic Ca
- (c)
gangue
- (d)
slag
Consider the following statements Roasting is carried out to
1.convert sulphide to oxide and sulphate.
2.remove water of hydration.
3.melt the ore
4.remove arsenic and sulphur impurities
- (a)
1,2,3 are correct
- (b)
1 and 4 are correct
- (c)
1,2 and 4 are correct
- (d)
2,3 and 4 are correct
Aluminium is more reactive than iron but aluminium is less corroded than iron, because
- (a)
oxygen forms a protective oxide layer
- (b)
it is a noble metal
- (c)
iron undergoes reaction easily with water
- (d)
iron form ions
Assertion (A) Metals are good conductors of heat.
Reason (R) On burning,Metals react with oxygen to produces metal oxides.
- (a)
Both A and R are true and R is the correct explanation of A
- (b)
Both A and R are true but R is not the correct explanation of A
- (c)
A is true but R is false
- (d)
A is false but R is true
Flux is used to remove
- (a)
basis impurities
- (b)
acidic impurities
- (c)
all type of impurities
- (d)
acidic and basic impurities
In electro-refining of copper , some gold is deposited as
- (a)
cathode
- (b)
electrode
- (c)
cathode mud
- (d)
anode mud
By annealing, steel
- (a)
becomes soft
- (b)
becomes liquid
- (c)
becomes hard and brittle
- (d)
is covered with a thin film of Fe3O4
German silver is an alloy of
- (a)
gold and silver
- (b)
copper and silver
- (c)
copper,zinc and silver
- (d)
copper,zinc and Nickel
Match Column I with Column II
Column I | Column II |
A.Potassium bromide | 1.Fertilizer |
B.Potassium nitrate | 2.Photography |
C.Potassium sulphate | 3.Bakery |
D.Monopotassium tartarate | 4.Gun power |
- (a)
A B C D 3 2 4 1 - (b)
A B C D 1 3 2 4 - (c)
A B C D 2 4 1 3 - (d)
A B C D 4 1 3 2
Salts of which of the following elements provide colours to fireworks?
- (a)
Zinc and sulphur
- (b)
Potassium and mercury
- (c)
Strontium and barium
- (d)
Chromium and nickel
Match Column I with Column II
Column I | Column II |
A.Horn silver | 1.ZnSO4.7H2O |
B.Lunar caustic | 2.AgNO3 |
C.Blue vitriol | 3.AgCl |
D.White vitriol | 4.CuSO4.5H2O |
- (a)
A B C D 3 2 4 1 - (b)
A B C D 2 4 1 3 - (c)
A B C D 4 1 3 2 - (d)
A B C D 1 3 2 4
Hard steel contains
- (a)
2 to 5% carbon
- (b)
0.5 to 1.5% carbon
- (c)
0.1 to 0.4% carbon
- (d)
0.01 to 0.04% carbon
Consider the following statements
1.Copper pyrites (CuFeS2 ) are concentrated by froth-floatation method.
2.Iron ore is concentrated by magnetic treatment.
3.The oil used in the froth floatation method for the purification of ores is pine oil.
Which of the above is/are correct?
- (a)
Only 1
- (b)
Only 2
- (c)
1,2 and 3
- (d)
1 and 3
Match Column I with Column II
Column I | Column II |
A.Haematite | 1.Aliminium |
B.Cassiterite | 2.Tin |
C.Cryolite | 3.Silver |
D.Argentite | 4.Iron |
- (a)
A B C D 4 2 1 3 - (b)
A B C D 2 1 3 4 - (c)
A B C D 1 3 4 2 - (d)
A B C D 3 4 2 1
Solvary process converts which of the following into soda ash?
- (a)
Brine
- (b)
Caustic soda
- (c)
Sodium bicarbonate
- (d)
Sodium oxide
The first metal used by man was
- (a)
gold
- (b)
silver
- (c)
copper
- (d)
iron