Related Questions

Nitroglycerene absorbed in wood flour, sodium nitrate or ammonium nitrate is commercially used as a controlled explosive called dynamite. The raw material used for its manufacture are glycerene, nitric acid and
A Sulphuric acid
B Phosphoric acid
C Hydrochloric acid
D Hydroflouric acid
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
Raw materials required for the manufacture of __________ is acetylene and hydrochloric acid.
A Phthalic anhydride
B Vinyl chloride
C Maleic anhydride
D Dacron
Most easily and cheaply available fibrous raw material for paper manufacture available in India is bamboo. The yield of pulp produced from fibrous raw material by mechanical process is about __________ percent.
A 75
B > 30
C 50
Nitric acid is not used in the manufacture of
A Detergents
B Fertilisers
C Aqua regia
D Explosives
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
For the manufacture of Portland cement, the proportions of raw materials used, are
A Lime 63% ; silica 22% ; other ingredients 15%
B Lime 22% ; silica 63% ; other ingredients 15%
C Silica 40% ; lime 40% ; other ingredients 20%
D Silica 70% ; lime 20% ; other ingredients 10%
Raw materials for 'Solvay Process' for manufacture of the soda ash are
A Salt, limestone and coke or gas
B Ammonia, salt and limestone
C Ammonia limestone and coke
D None of these
নিম্নের কোন পরীক্ষাটি সালফিউরিক এসিড ও নাইট্রিক এসিডের মধ্যে পার্থক্য করতে ব্যবহার করা যায়? (Which one of the following tests can be used to distinguish between sulphuric acid and nitric acid?
A সার্বজনীন নির্দেশক দিয়ে পরীক্ষা। (Test with universal indicator)
B সোডিয়াম কার্বনেট গুড়া যোগে। (Addition of sodium carbonate powder)
C ম্যাগনেশিয়াম ফিতা যোগে। (Addition of magnesium ribbon)
D বেরিয়াম নাইট্রেট দ্রবণ যোগে। (Addition of barium nitrate solution )

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