Advertisements
Advertisements
प्रश्न
Asmita went to buy an earthen pot. There she saw many things kept for sale.
How did she identify what she needed?
उत्तर
Asmita identified the earthen pot by its shape.
APPEARS IN
संबंधित प्रश्न
Define the term matter. What is it composed of?
Classify the following into metals, non-metals and metalloids:
Silicon, Mercury, Diamond, Sulphur, Iodine, Germanium, Sodium, Carbon, Magnesium, Copper, Boron, Helium
If 25 mL of acetone is present in 150 mL of its aqueous solution, calculate the concentration of solution.
Explain what happens when a beam of light is passed through a colloidal solution.
What do you understand by the statement " the solubility of copper sulphate in water at 20°C is 20.7 g" ?
The solubility of ammonium chloride in water at various temperatures is given below :
| Temperature | : | 10°C | 20°C | 40°C | 60°C | 80°C |
| Solubility | : | 24 g | 37 g | 41 g | 55 g | 66 g |
What mass of ammonium chloride would be needed to make a saturated solution of ammonium chloride in fifty grams of water at 40°C ?
How can you obtain pure water from a salt-water mixture (or salt-solution) ? Draw a neat and labelled diagram of the apparatus you would use to obtain pure water from a salt-water mixture (or salt-solution).
The given mixture contains three constituents A, B and C. The constituent A is a yellow coloured, solid element which dissolves in a liquid D. The constituent B is a blue coloured salt which is insoluble in liquid D but dissolves easily in another liquid E. The constitudent C is a liquid which is used in cooking food and forms a solid fat on hydrogenation.
(a) What do you think could (i) constituent A, and (ii) liquid D be ?
(b) What could (i) constituent B, and (ii) liquid E be ?
(c) What could liquid C be ?
(d) How will you separate the mixture containing A, B and C ?
Intermolecular space is maximum in ______.
Atoms are tiny particles that repel each other when they are squeezed very close.
