Advertisements
Advertisements
प्रश्न
What difference in the properties of oil and water enable their separation by a separating funnel ?
Advertisements
उत्तर
The differences in the properties of oil and water that enable their separation by separating funnel are:
- Oil and water are immiscible liquids.
- Oil and water have different densities.
APPEARS IN
संबंधित प्रश्न
The smallest unit of matter that exists freely in nature is called ...........
Define the term matter. What is it composed of?
Fill in the blank :
The substances which can flow are called ________
Name the scientist who studied the movement of pollen grains suspended in water through a microscope. What is this phenomenon known as?
Name the property which allows metals to be hammered into thin sheets.
What is meant by (i) elements (ii) compounds, and (iii) mixtures ?Write down the names of two elements, two compounds and two mixtures.
Which of the following are compounds ?
- CO
- No
- NO
- Co
The elements which normally exist in the liquid state are :
In the following set of substances, one item does not belong to the set. Select this item and explain why it does not belong to the set :
Hydrogen, Oxygen, Steam, Chlorine
How much water should be added to 15 grams of salt to obtain 15 per cent salt solution ?
How much water should be mixed with 12 mL of alcohol so as to obtain 12 % alcohol solution ?
Which of the following contains less solute at a given temperature and pressure ? Unsaturated solution or Saturated solution.
Choose one term from the following which includes the other three :
aerosol, emulsion, colloid, sol
How will you test whether a given solution is a colloidal solution ?
What is meant by the concentration of a solution ?
What is a colloid ? Give two examples of colloids (or colloidal solutions)
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 dyes present in fountain pen ink can be separated by the technique of :
Which of the following cannot be separated from air by the process of fractional distillation ?
The liquid air has three components X, Y and Z whose boiling points are : –186°C, –183°C and –196°C,
respectively. When liquid air is fed into a tall fractional distillation column from near its bottom and warmed
up slowly :
(a) Which component will be collected from near the bottom of the fraction distillation column ? Why ?
(b) Which component will be collected from the top part of the fractional distillation column ? Why ?
(c) Which component will be collected from the middle part of the fractional distillation column ? Why ?
(d) What could the component X, Y and Z be ?
