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प्रश्न
What are the two conditions for the interconversion of states of matter ?
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उत्तर
Two conditions are : change in
- Temperature
- Pressure
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संबंधित प्रश्न
The molecules can move freely anywhere in
Define the term matter. What is it composed of?
Which of the following materials fall in the category of a “pure substance”?
- Ice
- Milk
- Iron
- Hydrochloric Acid
- Calcium oxide
- Mercury
- Brick
- Wood
- Air
What is the scientific name of particles which make up mater?
Name the property which allows metals to be hammered into thin sheets.
What are the three groups into which all the elements can be divided ? Name two elements belonging to each group.
What is meant by (i) elements (ii) compounds, and (iii) mixtures ?Write down the names of two elements, two compounds and two mixtures.
On the basis of composition of matter, milk is considered to be :
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Hydrogen, Oxygen, Steam, Chlorine
Define Foam Give one example.
One of the following is a solid foam. This one is :
Which of the following represents the solubility of sugar in water at 20°C ?
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How will you separate water from mustard oil ?
A solid mixture contains four constituents P, Q, R and S. P consists of tiny grains and it is mixed with
cement for plastering the walls. Q is a white solid which is recovered on a large scale from sea water by the
process of evaporation. R is in the form of tiny particles of a material whose corrosion is called rusting. And
S is a white solid which is used in making ordinary dry cells.
- What could P, Q, R and S be ?
- How would you separate a mixture containing P, Q, R and S ?
If there is a sudden shower, we take shelter under a roof at the roadside. Even though the rain does not fall on us directly, we get wet to some extent. Why ?
______ is a smallest particle.
Intermolecular space is maximum in ______.
Which statement is not correct for a mixture
Examples of foam are ______.
