Bacteria cannot be seen with the naked eyes, but these can be seen with the help of a microscope. If you have to carry a sample from your home to your biology laboratory to demonstrate the presence of microbes under a microscope, which sample would you carry and why?

Anonymous User Biology Microbes in Human Welfare 14 Mar, 2020 1 Answer 55 views
















In a fcc arrangement of A & B atoms, where A atoms are at the Corners of the unit cell, B atoms at the face centers, two atoms are missing from two corners in each unit cell, then the simplest formula of the compound is

Anonymous User Chemistry Solid State 14 Mar, 2020 1 Answer 66 views











In a face centred lattice with all the positions occupied by A atoms the body centred octahedral hole in it is occupied by an atom B of an appropriate size for such a crystal, calculate the void space per unit volume of unit cell. Also predict the formula of the compound?

Anonymous User Chemistry Solid State 14 Mar, 2020 1 Answer 155 views

A tube of uniform cross sectional area 1 cm2 is closed at one end with semi permiable membrane. A solution having 5 gm glucose per 100 ml is placed inside the tube and dipped in pure water at 27°C. When the equilibrium is established, what will be the osmotic pressure, height developed in vertical column. Also calculate molality and molarity of the solution. Density of glucose solution is 1 gm/ml

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The vapour pressures of ethanol and methanol are 42.0 mm and 88.5 mm Hg respectively. An ideal solution is formed at the same temperature by mixing 46.0 g of ethanol with 16.0 g of methanol. The mole fraction of methanol in the vapour is:

Anonymous User Chemistry Solutions 13 Mar, 2020 1 Answer 66 views

The vapour pressure of benzene at 80°C is lowered by 10 mm by dissolving 2g of a non-volatile substance in 78g of benzene. The vapour pressure of pure benzene at 80°C is 750 mm. The molecular weight of the substance will be:

Anonymous User Chemistry Solutions 13 Mar, 2020 1 Answer 838 views

Solute A is a ternary electrolyte and solute B is non-electrolyte. If 0.1 M solution of solute B produces an osmotic pressure of 2P, then 0.05 M solution of A at the same temperature will produce on osmotic pressure equal to

Anonymous User Chemistry Solutions 13 Mar, 2020 1 Answer 61 views


Dry air was passed successively through a solution of 5 g of a solute in 180 g of water and then through pure water. The loss in weight of solution was 2.50 g and that of pure solvent 0.04 g. The molecular weight of the solute is:

Anonymous User Chemistry Solutions 13 Mar, 2020 1 Answer 65 views