Related Questions

Commercial production of soda ash by Solvay process requires limestone, __________ as raw materials.
A Coke and sand
B Brine and coal
C Coke and caustic soda
D None of these
The price of raw meterials had gone up by 15% labor cost has also increased from 25% of the cost of ras material to 30% of the cost of raw material. By how much percentage should there be reduction in the usage of raw materials so as to keep the cost same?
A 28%
B 17%
C 27%
D 24%
The inventory of raw materials included in the working capital is usually about __________ months supply of raw materials valued at delivery prices.
A One
B Three
C Six
D Twelve
Coke used for the production of calcium carbide should have
A Low ash content
B Low ignition temperature
C High electrical resistivity
D All of the above
Production of one ton of cement requires about __________ tons of limestone.
A 0.6
B 1.2
C 2.2
D 3.8
The temperature in the calcium carbide furnace is __________ °C.
A 200-300
B 700-850
C 2000-2200
D 4000-4500
When Mr. Sen imports some raw materials he has to pay 7% import duty on the portion of the total value of the item in excess of TK. 1000. If the amount of import duty he paid was TK. 87.50 then what was the value of the raw material that he imported ?
A TK. 1,250
B TK.2,250
C TK. 2,500
D TK. 2,750
আদ্র বাতাসের সংস্পর্শে ক্যালশিয়াম কার্বাইড নিম্নের কোন যৌগটি উৎপন্ন করে? (Which of the following compound is produced when calcium carbide gets contact with moist air?)
A Ethene
B Ethane
C Ethyne
D Ethanal
আর্দ্র বাতাসের সংস্পর্শে ক্যালশিয়াম কার্বাইড নিম্নের কোন যৌগটি উৎপন্ন করে? (Which of the following compound is produced when calcium carbide gets contact with moist air?)
A Ethene
B Ethane
C Ethyne
D Ethanal
Main product in calcium carbide-water reaction is
A Ca(OH)2
B C2H2
C CO2
D CaCO3

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