Related Questions

Which one of the following gases dissolves in water to give acidic solution?
A Carbon dioxide
B Oxygen
C Nitrogen
D Hydrogen
Gold dissolves in
A Hydrochloric acid
B Nitric acid
C Aqua regia
D Acetic acid
Solubility of a substance which dissolves with an increase in volume and liberation of heat will be favoured by the
A Low pressure and high temperature
B Low pressure and low temperature
C High pressure and low temperature
D High pressure and high temperature
When the solvent dissolves very little of solute, then
A Solvent of low latent heat of vaporisation should be used
B Solvent of low freezing point should be used
C Large quantity of solvent is required to extract the solute
D Very small quantity of solvent is required
Which one of the following oxides dissolves in water?
A CuO
B Al2O3
C Fe2O3
D Na2O
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
Forty tiles of dimensions 1 foot * 2 foot each are required to completely cover a floor. How many tiles of dimensions 2 foot * 4 foot each would be required to completely cover the same floor?
A 10
B 20
C 80
D 160
Pipe P can fill and empty tank in 4 hours but pipe Q can completely empty the same tank in 8 hours. But the pipes were opened alternately after every two hours starting with pipe P then in how many hours, the tank was completely filled ?
A 6 hours
B 5 hours
C 10 hours
D 12 hours
What is the amount of equal installment , if a sum of TK. 1428 due 2 years hence has to be completely has to be completely repaid in 2 equal annual installments starting next year?
A TK. 700
B Tk. 800
C Tk. 650
D cannot be determined
The ductility value of bitumen for suitability in road construction should not be less than
A 30 cm
B 40 cm
C 50 cm
D 60 cm

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