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Chemistry Class 10 Chapter 8


Updated: 15 Dec 2023

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Chemistry Class 10 Chapter 8 introduces the concept of “Chemical Industries”. This is mainly chapter No. 15, “Chemical Industries”, of the book of Class 10.
This article consists of Notes, SLO Based Notes and MCQs of chemistry, which cover your course, board papers and clear your chemistry concept for different types of tests.

Chemistry Class 10 Chapter 8 Notes

Chemical Industries

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Chemistry Class 10 Chapter No. 16 Notes

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SLO Base Questions

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Chemistry Class 10 Chapter No. 16 SLO Questions

Download Chapter No. 16 SLO Questions

Chemistry Class 10 Chapter 8 MCQs

1. To maintain high standard of living, scientist developed new methods of preparation at ___________.
(a) Low cost
(b) Large scale
(c) Improved quality
(d) All of them
Show Answer

All of them


2. Scientist established ________order to meet the needs of modern society.
(a) Industries
(b) Machines
(c) None
(d) All of them
Show Answer

Industries


3. Chemical industries also play a vital role in _____development of the country.
(a) Geography
(b) Economic
(c) GDP
(d) ADP
Show Answer

Economic


4. The science that deals with the procedure used in extracting metals from their ores, purifying, alloying metals and creating useful object from metal is called _________.
(a) Metallurgy
(b) Ornithology
(c) Thermodynamics
(d) None of these
Show Answer

Metallurgy


5. The naturally occurring metallic compounds are called______________.
(a) Gangue
(b) Ores
(c) mineral
(d) None of these
Show Answer

mineral

To Download Complete Notes of Chemistry Notes 10 Class, Click on the given link.

6. The aggregate of mineral and other impurities is known as ___________.
(a) Gangue
(b) Ores
(c) mineral
(d) All of these
Show Answer

Ores


7. The earthy material such as sand, rock, clay and other impurities attached with the ores are called __________.
(a) Gangue
(b) Ores
(c) Minerals
(d) None of these
Show Answer

Gangue


8. Metals occur in nature in which state?
(a) Free state
(b) Combined state
(c) Both
(d) None of these
Show Answer

Both


9. Metals exist in combined from with _______________.
(a) Oxides
(b) Halides
(c) Silicates
(d) All of these
Show Answer

All of these


10. Metals are extracted from _______by different methods.
(a) Gangue
(b) Ores
(c) Minerals
(d) Vitamins
Show Answer

Ores


11. The selection of the process for extraction of metal is mainly depend upon
(a) Type of ore
(b) Reacting of metal
(c) Nature of gangue
(d) All of them
Show Answer

All of them


12. The removal of useless rocky portion of the ore is called ___________ of ore.
(a) Concentration
(b) Crushing
(c) Forth floatation
(d) None of these
Show Answer

Concentration


13. Concentration of ore is also called ___________.
(a) Enrichment of ore
(b) Dressing of ore
(c) Both a and b
(d) None of these
Show Answer

Both a and b


14. __________is an impure metal containing large amount of sand and rocky material.
(a) Mineral
(b) ore
(c) Gangue
(d) Stones
Show Answer

ore


15. The impurities in minerals like sand, rocky materials, limestone, mica etc is called _________.
(a) Mineral
(b) Ore
(c) Gangue
(d) None of these
Show Answer

Gangue


16. The gangue is also called __________.
(a) Matrix
(b) Roast
(c) Stamp mill
(d) None of these
Show Answer

Matrix


17. Huge lumps of the ores are broken into small pieces with the help of _________.
(a) Bessemer
(b) Crusher
(c) Hydraulic washer
(d) None of these
Show Answer

Crusher


18. The pieces of crushed ore is reduced to fine powder with the help of a __________.
(a) Ball mill
(b) Stamp mill
(c) Both a and b
(d) leachate
Show Answer

Both a and b


19. The conversion of crushed ore is reduced to fine powder with the help of a __________.
(a) Pulverization
(b) Calcination
(c) Concentration
(d) condensation
Show Answer

Pulverization


20. A method in which ore is concentrated to sufficient degree of purity by simply picking it with hand and breaking the rock stones with hammers is called _________.
(a) Concentration
(b) Hand picking
(c) Gravity separation
(d) None of these
Show Answer

Hand picking


21. Hydraulic washing is a method based on difference in _______ of the ores and gangue.
(a) Densities
(b) Entropy
(c) Melting point
(d) Boiling point
Show Answer

Densities


22. A method that is based on the wetting of the ore and gangue with pine oil and water is called _____.
(a) Gravity separation
(b) Smelting
(c) Froth floatation
(d) None of these
Show Answer

Froth floatation


23. Froth floatation method is especially used for _____ores.
(a) Oxide
(b) Sulphide
(c) Halide
(d) Aldehyde
Show Answer

Sulphide


24. Why concentrated ore is converted to oxide ore?
(a) Metal can obtain easily
(b) Metal can be roasted
(c) Metal has slag
(d) Metal can destroyed
Show Answer

Metal can obtain easily


25. The process in which concentrated ore is heated either alone or with some other materials in excess of air in a furnace is called ________.
(a) Smelting
(b) Bessemerization
(c) Roasting
(d) None of these
Show Answer

Roasting


26. A process in which the oxide ore in the fused state is reduced with reducing agent such as coke to get the metal is called _________.
(a) Smelting
(b) Roasting
(c) Electro-refining
(d) None of these
Show Answer

Smelting


27. In smelting process, the slag formed is called __________.
(a) Silica
(b) Iron silicate
(c) Iron oxide
(d) Silicon
Show Answer

Iron silicate


28. The molten cuprous sulphide (Cu_2S) with iron sulphide (FeS) is called ___________.
(a) Matrix
(b) Leachate
(c) Matte
(d) None of these
Show Answer

Matte


29. The copper produced in Bessemerization process is known as __________.
(a) Blister Copper
(b) Pure copper
(c) Solid copper
(d) Mixed copper
Show Answer

Blister Copper


30. The copper produced in Bessemer process is ________pure.
(a) 50%
(b) 97%
(c) 73%
(d) 83%
Show Answer

97%


31. Electro-refining of metals in process of obtaining pure metal from the impure one by the process of ______.
(a) Chemical decomposition
(b) Physical decomposition
(c) Electrolysis
(d) None of these
Show Answer

Electrolysis


32. Sodium carbonate is also known as _________.
(a) Washing soda
(b) Soda ash
(c) Baking soda
(d) Both a and b
Show Answer

Both a and b


33. What is the chemical formula of sodium carbonate?
(a) Na_2CO_3
(b) CaCO_3
(c) Al_2CO_3
(d) NaCaO
Show Answer

Na_2CO_3


34. __________ is domestically known as a water softner.
(a) Aluminum silicate
(b) Ammonia
(c) Sodium carbonate
(d)
Show Answer

Sodium carbonate


35. Who prepared sodium bicarbonate (NaHCO_3) and sodium carbonate (Na_2CO_3) for the first time from cheap and abundantly available raw material such as limestone and NaCl ?
(a) Ernest Solvay
(b) Max Plank
(c) Henry Bessemer
(d) Neil bohar
Show Answer

Ernest Solvay


36. On industrial scale, sodium carbonate is prepared by ___________.
(a) Electrolytic Refining
(b) Bessemerization
(c) Solvay process
(d) Fermentation
Show Answer

Solvay process


37. A __________solution of sodium chloride is called brine.
(a) Unsaturated
(b) Saturated
(c) Super-saturated
(d) Semi- saturated
Show Answer

Saturated


38. __________ is an organic compound having a carbonyl functional group attached to two amine groups.
(a) Urea
(b) Soda Ash
(c) Ammonical liquor
(d) None of these
Show Answer

Urea


39. Urea is also known as __________.
(a) Matrix
(b) Flague
(c) Carbamide
(d) Hydrogen
Show Answer

Carbamide


40 What is the chemical formula of urea?
(a) NH_4CON_2
(b) NH_2CONH_2
(c) Na_2CO_3
(d) None of these
Show Answer

NH_2CONH_2


41. Who synthesized urea from inorganic substance in 1828?
(a) Friedrich Wohler
(b) Ernest Solvay
(c) Zelinski
(d) None of these
Show Answer

Friedrich Wohler


42. _________ was the first organic compound synthesized from an inorganic compound.
(a) Sodium carbonate
(b) Urea
(c) Acetic acid
(d) None of these
Show Answer

Urea


43. In Urea, which element has the highest percentage?
(a) Carbon
(b) Hydrogen
(c) Oxygen
(d) Nitrogen
Show Answer

Nitrogen


44. In Urea, the nitrogen contents are _________.
(a) 46.67%
(b) 26.67%
(c) 20%
(d) 6.66%
Show Answer

46.67%


45. Urea ________ readily in water.
(a) dissolves
(b) Semi-dissolves
(c) Not-dissolves
(d) None of these
Show Answer

dissolves


46. The word petroleum is a combination of two ________wordsl.
(a) Greek
(b) Latin
(c) Scandinavian
(d) Arabic
Show Answer

Latin


47. The word petro means_______.
(a) Gangue
(b) Viscous Liquid
(c) Rock
(d) None of these
Show Answer

Rock


48. The petroleum is a _________ present as dark viscous liquid under the ground.
(a) Crude oil
(b) Fertilizer
(c) Asphalt
(d) None of these
Show Answer

Crude oil


49. The petroleum is mainly composed of ___________.
(a) Hydrocarbons
(b) Ammonia
(c) In Organic compounds
(d) Organic Compound
Show Answer

Hydrocarbons


50. The chines use petroleum as fuel as early as ___________.
(a) 1000 BC
(b) 500 AD
(c) 200 BC
(d) 500 BFC
Show Answer

200 BC


51. The richest deposits of petroleum are located in _____________.
(a) Saudi Arabia
(b) Kuwait
(c) USA
(d) All of these
Show Answer

All of these


52. In solid form, the petroleum is called __________.
(a) Crude oil
(b) Asphalt
(c) Natural Gas
(d) None of these
Show Answer

Asphalt


53. In liquid state, the petroleum is called___________.
(a) Crude Oil
(b) Asphalt
(c) Natural Gas
(d) None of these
Show Answer

Crude Oil


54. In gaseous form, the petroleum is called __________.
(a) Curde oil
(b) Asphalt
(c) Natural gas
(d) None of these
Show Answer

Natural gas


55. Petroleum occurs at the depth of __________or more.
(a) 100 feet
(b) 500 feet
(c) 1500 feet
(d) 1000 feet
Show Answer

500 feet


56. The conversion of crude oil into useful products with different boiling range and free from impurities is called ________.
(a) Refining
(b) Pulverizing
(c) Electrolysis
(d) hydrolytes
Show Answer

Refining


57. The crude oil is heated upto in a fractionating column.
(a) 100 {}^o C
(b) 400 {}^o C
(c) 1000 {}^o C
(d) 1200 {}^o C
Show Answer

400 {}^o C


58. When Sodium bicarbonate is heated to get sodium carbonate, all are produced except:
(a) CO
(b) CO_2
(c) Na_2CO_3
(d) H_2O
Show Answer

CO


59. Froth floatation process is concentration of ore by:
(a) Magnetically
(b) Welting of ore
(c) Density
(d) Chemically
Show Answer

Welting of ore


60. All are the raw materials for the manufacture of soda ash except :
(a) Ammonia
(b) Brine
(c) Lime stone
(d) CO
Show Answer

CO


61. All are the raw materials for the manufacturing of urea except:
(a) CO_2
(b) NH_3
(c) H_2O
(d) NaCl
Show Answer

NaCl


62. Blister copper is refined through:
(a) Concentration
(b) Reduction
(c) Electrolysis
(d) Smelting
Show Answer

Electrolysis


63. Petroleum is separate into different fractions by the process of
(a) Simple distillation
(b) Condensation
(c) Evaporation
(d) Factional distillation
Show Answer

Factional distillation


64. The concentration ore is roasted in a furnace between _________in presences of a current of air.
(a) 25 {}^o C \ to \ 100 {}^o C
(b) 500 {}^o C \ to \ 700 {}^o C
(c) 250 {}^o C \ to \ 500 {}^o C
(d) 50 {}^o C \ to \ 180 {}^o C
Show Answer

500 {}^o C \ to \ 700 {}^o C

Chemistry Class 10 MCQs (All Chapters)


Jawad Khan

Jawad Khan

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