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
What is a mixture of potassium nitrate, powdered charcoal and sulphur called?
A Glass
B Cement
C Paint
D Gun powder
Solvay process is not used for the manufacture of potassium carbonate, because of the reason that potassium bicarbonate
A Is prone to thermal decomposition
B Has high water solubility and is unstable
C Is soluble in ammonium chloride and potassium chloride solution
D All of the above
Which of the following is not a commercially used feed-stock for the production of ammonia synthesis gas?
A Water
B Naphtha
C Tar
D Coal/coke oven gas
Ammonium nitrate (is mixed with limestone) is not used as fertiliser as such, because
A It is hygroscopic and explosive in nature
B It is highly acidic in nature
C It is a liquid at room temperature
D Its nitrogen content is very less
Neutraliser tank used for reacting nitric acid with ammonia for the production of ammonium nitrate is made of
A Aluminium
B Stainles steel
C High silicon (14%) iron
D Copper
বাণিজ্যিকভাবে নিচের কোনটি থেকে পেনিসিলিন তৈরি হয়? (Which one of the following produces penicillin commercially?)
A Penicillium notatum
B Penicillium chrysogenum
C Penicillium roqueforti
D Penicillium camemberti
Identify the correct answer which is semicolon. The golden crab of the Gulf of Mexico has not been fished commercially in great numbers, primarily " on account of living" at great depths- 2,500 to 3,000 feet down.
A on account of living
B on account of their living
C because it lives
D because of living
Which of the following is not produced commercially from sea water?
A Magnesium & potassium compounds
B Common salt
C Bromine
D Iodine
Which of the following is the lowest cost plastic commercially available?
A Polythene
B Teflon
C Bakelite
D PVC

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