Related Questions

How many liters of a 90% of concentrated acid needs to be mixed with a 75% Solution of concentrated acid to get a 30 liter Solution of 78% concentrated acid?
A 8
B 6
C 7
D 9
A garments factory employs 3 categories of workers K, M and N. The efficiency of the 3 categories of workers to do a specific task is in the ratio of 3 : 5 : 6 respectively and the factory employs 15 of category K, 12 of category M and 3 of category N. If the total wages paid to the entire group of 30 workers is Tk. 492 per hour, what will be the wages earned by a category N worker for an 8-hour day?
A Tk. 144
B Tk. 72
C Tk. 192
D Tk. 576
কোন যৌগটি পানিতে সহজে দ্রবীভূত হয়ে গাঢ় সালফিউরিক এসিডের সাথে বাষ্পযুক্ত সাদা ধোঁয়া তৈরি করে এবং জলীয় সিলভার নাইট্রেট দ্রবণে সাদা অধঃক্ষেপ দেয়? (Which compound dissolves easily in water, form steamy white fumes with concentrated sulfuric acid and gives white precipitate with aqueous silver nitrate solution?)
A AgCl
B NaBr
C NaCl
D PbBr2
Which is the most suitable for the con-certration of highly concentrated solution?
A Open pan evaporation
B Long tube vertical evaporator
C Agitated film evaporator
D None of these
Where are most or the Earth's active volcanoes concentrated at present?
A South America
B Africa
C Pacific Ocean
D Europe
The most suitable vessel for storing concentrated sulphuric acid is
A Copper vessel
B Aluminium vessel
C Glass vessel
D Earthen vessel
Most suitable material of construction for the storage of concentrated nitric acid is
A Cast iron
B Monel
C Karbate
D Aluminium or chromium alloys (Cr > 18% for cold acid)
If the energy is supplied from a source, whose resistance is 1 ohm, to a load of 100 ohms the source will be
A A voltage source
B A current source
C Both of above
D None of the above
Read the paragraph and answer the question-photosynthesis is a process in which radiant energy from sun is stored as chemical energy , which in turn is used to decompose carbon dioxide and water. The product of their decomposition are recombined into a new compound which successively builds, up into more and more complex organic substances like sugars, starches and cellulose that comprise the plant.The word stored in the paragraph is closest in morning to
A specified
B retained
C converted
D discovered
Geothermal energy may serve as an important source of energy in
A The Konkan Coast
B Ladakh District
C Aravalli Hills
D Narmada Valley

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