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प्रश्न
A kind of matter which can sublime is
पर्याय
water
plastic
milk
iodine
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उत्तर
iodine
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संबंधित प्रश्न
Which of the following materials fall in the category of a “pure substance”?
- Ice
- Milk
- Iron
- Hydrochloric Acid
- Calcium oxide
- Mercury
- Brick
- Wood
- Air
Name a metal which is soft and a non-metal which is hard.
What is meant by saying that non-metals are brittle ?
What is meant by saying that metals are lustrous ?
What is the general name of the materials which contain at least two pure substances and show the properties
of their constituents ?
Classify the following as elements or compounds :
Iron, Iron sulphide, Sulphur, Chalk, Washing soda, Sodium, Carbon, Urea
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.
What do you understand by the statement " the solubility of copper sulphate in water at 20°C is 20.7 g" ?
Tincture of iodine has antiseptic properties. This solution is made by dissolving :
100 mL of water at room temperature of 25°C is taken in a beaker and a little of solid S is dissolved in it by stirring to obtain a solution X. More and more of solid S is added to the solution with constant stirring, while keeping the temperature of solution constant at 30°C. After some time it is observed that no more solid dissolves in water and at the same time some solid is also left undissolved at the bottom of the beaker.
- The contents of beaker are filtered through a filter paper to obtain solution Y in the form of a filtrate.
- What name is given to solutions like X ?
- What name is given to solutions like Y ?
- What will you observe if the solution Y at 30°C is cooled down to 10°C by keeping the beaker in crushed ice ? Why ?
- What term is used to denote the amount of solid dissolved in 100 grams of water in a solution lie Y ?
Fill in the following blanks with suitable words :
The separation of liquids by fractional distillation is based on the difference in their .....................
The boiling point of liquid argon is :
The best way to recover sugar from an aqueous sugar solution is :
Explain the meaning of the term matter with special reference to the term ‘substance’.
Wipe the board with a duster and then tap the duster against the table. What do you see?
Diffentiate between absorption and adsorption.
The most reactive metal is ______.
Which statement is not correct for a mixture
Define the term matter.
