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Quiz 13
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Q.1
The metallic constituents of hard water are :
Magnesium, calcium and tin
Iron, tin and calcium
Calcium, magnesium and iron
Magnesium, tin and iron
Q.2
Potassium Permanganate is used for purifying drinking water, because________
It is a reducing agent
It is an oxidising agent
It is a sterilising agent
It dissolves the impurities of water
Q.3
Ultraviolet rays can be used in water treatment as
Flocculator
Precipitator
Hydrolyser
Disinfectant
Q.4
Which mineral is the ore of aluminium ?
Haematite
Bauxite
Magnetite
Siderite
Q.5
Which of the following is a metallic ore ?
Mica
Quartz
Feldspar
Galena
Q.6
Bee sting contains
An acidic liquid
A salt solution
An alkaline liquid
A corrosive liquid
Q.7
Sweat contains water and ________
Citric acid
Lactic acid
Salt
Vinegar
Q.8
If water smells bad, then that odour can be removed by adding
Alum
Bleach
Activated carbon
Deactivated nitrogen
Q.9
Maximum permissible concentration of total hardness in drinking water is
50
100
200
500
Q.10
The purest form of Iron is :
Cast iron
Steel
Pig iron
Wrought iron
Q.11
Sea water is saltier than rain water because
Sea animals are salt producing
The air around the sea is saltish
Rivers wash away salts from earth and pour them into the sea
Sea beds have salt producing mines
Q.12
Which of the following is the strongest base in aqueous solution ?
Diethylamine
Triethylamine
Ammonia
Ethylamine
Q.13
Lead in water can cause
Eye disease
Arthritis
Kidney damage
Hair falling
Q.14
Tar roads get damaged if there is
Stagnation of water on road
Heavy traffic
No maintenance
No sloping
Q.15
Magnalium is an alloy of
Aluminium and Magnesium
Magnesium and Tin
Aluminium and Zinc
Manganese and Magnesium
Q.16
Surface water is a better source of drinking water because it is poor in
Dust
Bacteria
Arsenic
Algae
Q.17
Which one of the following is extensively used for sterilizing water ?
Bleaching powder
Alum
Borax powder
Soda powder
Q.18
Which one of the following contains maximum percentage of carbon ?
Cast iron
Stainless steel
Wrought iron
High speed steel
Q.19
Stainless steel is an alloy of
Chromium and carbon
Chromium, carbon and iron
Chromium and iron
Carbon and iron
Q.20
Which one of the following is not a characteristic feature of alloys?
Compounds
Mixtures
Solutions
Homogeneous systems
Q.21
Electrolysis of an aqueous solution of copper sulphate using copper electrodes gives
Copper at cathode and oxygen at anode
Copper at anode and oxygen at cathode.
Copper at cathode and anodes dissolve to give copper
Hydrogen at cathode and oxygen at anode
Q.22
Froth floatation process to concentrate the minerals is applicable to
Calamine
Chalcopyrites
Bauxite
Haematite
Q.23
Brass is made of
Copper and tin
Tin and lead
Copper and zinc
Copper, tin and zinc
Q.24
Bauxite is used as raw material by which industry ?
Aluminium
Iron
Steel
Gold
Q.25
An alloy used in making heating elements for electric heating device is
Solder
Alloy Steel
Nichrome
German Silver
Q.26
Which of the following is an iron ore ?
Bauxite
Magnetite
Lignite
Nitrite
Q.27
Which of the following acids serves as an electrolyte in a lead storage battery?
Sulphuric acid
Lactic acid
Hydrochloric acid
Nitric acid
Q.28
Hardness of the water is commonly measured in terms of
Calcium carbonate equivalents
Calcium sulphate equivalents
Magnesium carbonate equivalents
Magnesium sulphate equivalents
Q.29
Aerated water contains
SO
2
NO
2
H
2
CO
2
Q.30
Magnetite is
Fe
2
O
3
Fe
3
O
4
FeCO
3
2Fe
2
O
3
. 3H
2
O
Q.31
Assertion (A) : Synthetic detergents can lather when in hard water.
Reason (R) : Synthetic detergents form soluble calcium and magnesium salts with hard water.
Both A and R is true and R is the correct explanation of A
Both A and R is true but R is not a correct explanation of A
A is true but R is false
A is false but R is true
Q.32
Iron is extracted from
Cinnabar
Haematite
Bauxite
Dolomite
Q.33
Galena is a mineral of
Iron
Gold
Lead
Calcium
Q.34
Aluminium can be purified by
Oxidation
Distillation
Electrolysis
Ozonolysis
Q.35
Chemical name of Gammaxane is
Toluene
Chloro benzene
Aniline
Benzene hexachloride
Q.36
Bridgmanite is
A bridge on the river Thames
Name of a game
Earth’s most abundant mineral
Name of a music
Q.37
Bronze is an alloy of
Copper and Zinc
Tin and Zinc
Copper and Tin
Iron and Zinc
Q.38
Brass contains
Copper and Zinc
Copper and Tin
Copper and Silver
Copper and Nickel
Q.39
The important metal used with iron to produce stainless steel is
Aluminium
Chromium
Tin
Carbon
Q.40
Which is known as carbolic acid?
Phenol
Ethanol
Acetic acid
Oxalic acid
Q.41
Citric acid is present in free form in
Tamarind
Milk
Apple
Lemon
Q.42
Most commonly used bleaching agent is
Sodium chloride
Alcohol
Carbon dioxide
Chlorine
Q.43
The BOD values of water indicate the
Amount of organic debris
Amount of oxygen used for biochemical oxidation
Amount of oxygen used for biochemical reduction
Amount of ozone used for biochemical oxidation
Q.44
Which is the purest form of iron?
Steel
Cast iron
Pig iron
Wrought iron
Q.45
The iron ore which contains 72% of iron is :
Magnetite
Limonite
Haematite
Siderite
Q.46
The aqueous solution of potassium chloride is
A weak electrolyte
A strong electrolyte
A non-electrolyte
Initially weak and then become a strong electrolyte
Q.47
Which one is the simplest form of alkane?
Propane
Butane
Methane
Decane
Q.48
Which of the following is used in making smoke bombs?
Sulphur
Phosphorus
Hydrogen
Carbon
Q.49
Epsom salt is used
As purgative
In softening water
In paper industry
In making tooth paste
Q.50
The metal extracted from Bauxite is :
Silver
Copper
Manganese
Aluminium
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