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Quiz 14
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Q.1
Percentage of carbon in steel ranges from
0.1 to 1.5
1.5 to 3.0
3.0 to 4.0
4.0 to 6.0
Q.2
Copper is refined by
Roasting
Oxidation
Electrolysis
Zone refining
Q.3
Brass is a
Compound
Element
Homogeneous mixture
Heterogeneous mixture
Q.4
Which of the following metals form an amalgam with other metals ?
Lead
Tin
Zinc
Mercury
Q.5
The acid which is secreted by the glands in the stomach wall is
Sulphuric acid
Hydrochloric acid
Nitric acid
Phosphoric acid
Q.6
Hydrochloric acid is also known as
Galic acid
Picric acid
Muriatic acid
Chloric acid
Q.7
The most pure form of Carbon among the options is
Anthracite
Lampblack
Graphite
Wood Charcoal
Q.8
Carbon footprint can be reduced by
All of these
Recycling waste materials
Using energy efficient appliances
Commuting by public transport
Q.9
Which of the following gases is most toxic ?
Carbon dioxide
Carbon monoxide
Sulphur dioxide
Chlorine
Q.10
Bauxite is an alloy of which of the following metals ?
Aluminium
Silver
Tin
Iron
Q.11
Hard steel contains
2 to 5 per cent carbon
0.5 to 1.5 per cent carbon
0.1 to 0.4 per cent carbon
0.01 to 0.04 per cent carbon
Q.12
When lime juice is dropped on baking soda, brisk effervescence takes place because the gas evolved is
Hydrogen
Oxygen
Carbon dioxide
All of them
Q.13
Sodium is produced by the electrolysis of
Molten sodium carbonate
Molten sodium chloride
Aqueous brine solution
Its cyanide complex
Q.14
The gas dissolved in water that makes it basic is :
Ammonia
Sulphur dioxide
Hydrogen
Carbon dioxide
Q.15
Which of the following is not a natural source of hydrocarbon?
Natural Gas
Coal
Petroleum
Mica
Q.16
The element with highest first ionisation energy is
Hydrogen
Helium
Lithium
Sodium
Q.17
Water gas is the mixture of
Carbon dioxide and hydrogen
Carbon monoxide and nitrogen
Carbon monoxide and hydrogen
Carbon dioxide and nitrogen
Q.18
In electro-refining, the pure metal is deposited on
Vessel
Electrolyte
Cathode
Anode
Q.19
The gas produced in marshy places due to decomposition of vegetation is
Carbon monoxide
Carbon dioxide
Sulphur dioxide
Methane
Q.20
Among the following iron ores, the highest percentage of iron content is found in–
Haemetite
Magnetite
Limnonite
None of these
Q.21
The gas used for artificial fruit ripening of green fruit is –
Ethylene
Acetylene
Ethane
Methane
Q.22
Brass is an alloy of
Lead and tin
Zinc and copper
Antimony, tin and lead
Zinc, tin and copper
Q.23
________ gives hardness to stainless steel.
Zinc
Lead
Carbon
Tin
Q.24
Heating of a ore below its melting point in the absence of air is known as
Refining
Calcination
Roasting
Smelting
Q.25
Why is water not suitable for putting out a petrol fire ?
The oxygen content of water is isolated by petrol and thus it helps in burning
Petrol is too inflammable to be extinguished by water
The heat required for combustion of petrol is very low
Water, being heavy, slips below petrol which thus remains in contact with air and burns
Q.26
The chemical(s) most commonly used for cloud seeding or ‘artificial rainmaking’ is/are
Silver Iodide
Sodium Chloride
Dry ice or frozen carbon dioxide
All the above
Q.27
Which of the following is used as a lubricant in heavy machines?
Bauxite
Sulphur
Phosphorus
Graphite
Q.28
Which of the following is used as filler in tyre of rubber ?
Carbon black
Coal
Coke
Graphite
Q.29
The open "Sigrees" or coal stoves often require fanning to sustain burning because of
Tendency of carbon dioxide to form a layer along with dust smoke
Lack of oxygen in the surroundings of sigrees
Accumulation of smoke and dust over the sigrees
Interrupted release of moisture from the material
Q.30
Bleaching powder is prepared by passing :
Chlorine over slaked lime
Oxygen over slaked lime
Carbon dioxide over slaked lime
Chlorine over quick lirne
Q.31
Which of the following acts as promoter for iron in Haber's process?
Mn
Mo
Mg
W
Q.32
One property of ammonia is
It is insoluble in water
It is a odourless gas
It is a yellowish gas
Its aqueous solution turns red litmus blue
Q.33
In a period from Li to F, ionisation potential
Cannot be predicted
Increases
Decreases
Remains same
Q.34
Which of the following electrodes is used in strongly alkaline solution?
Mercury - mercuric oxide electrode
Mercury - mercurous sulphate electrode
Mercury - mercurous chloride electrode
Silver - silver chloride electrode
Q.35
Organic compounds are
Covalent compounds
Ionic compounds
Co-ordination compounds
Interstitial compounds
Q.36
Vinegar is an aqueous solution of
Oxalic acid
Citric acid
Hydrochloric acid
Acetic acid
Q.37
Gold dissolves in
Hydrochloric acid
Nitric acid
Aqua regia
Acetic acid
Q.38
What is the mass percentage of oxygen in carbon dioxide (CO
2
)?
30.5%
50.9 %
65.8 %
72.7 %
Q.39
Commercial nitric acid is coloured because it contains dissolved :
Oxygen
Nitrous oxide
Nitrogen dioxide
Coloured impurities
Q.40
The natural source of hydrocarbon is
Crude oil
Biomass
Coal
Carbohydrates
Q.41
By which organic compound all the oils are known ?
Carbohydrate
Protein
Hydrocarbon
Ester
Q.42
Brass is an alloy of :
Cu, Al and Zn
Cu and Sn
Cu and Zn
Al and Mg
Q.43
Stainless steel is usually made by alloying the steel with
Copper and nickel
Copper and chromium
Chromium and nickel
Manganese and copper
Q.44
24 carat of diamond is equal to
480 mg
200 g
95% mg
91% gold
Q.45
1 carat of diamond is equal to
200 mg
200 g
100 mg
100 g
Q.46
Which one of the following is used for dating very old objects of archaeological importance?
Phosphorus-31
Tritium
Radium
Carbon-14
Q.47
In the periodic table of elements, on moving from left to right across a period, the atomic radius
Decreases
Increases
Remains unchanged
Does not follow a definite pattern
Q.48
For a spontaneous chemical process, the free energy change is
Positive
Negative
Zero
Depends on whether the reaction is exothermic or endothermic
Q.49
Two elements which can form a large number of compounds are
Carbon and Hydrogen
Carbon and Nitrogen
Carbon and Oxygen
Carbon and Sulphur
Q.50
Nitric acid does not react with
Gold
Copper
Zinc
Iron
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