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प्रश्न
State the property of the following substance.
Manganese dioxide, a catalyst which alters the rate of a chemical reaction is black in colour.
विकल्प
Physical
Chemical
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उत्तर
Chemical
संबंधित प्रश्न
Give reasons:
A wooden table should be called a solid.
Explain why, the diffusion of a solid in another solid is a very slow process.
For the following statement, say whether it describes a solid, a liquid or a gas.
Particles move about very quickly but do not leave the surface
Describe simple experiments to prove that solids have mass
Describe simple experiments to prove that liquids have no definite shape
Write the states of water.
Solids are compressible.
Gases have neither a definite shape nor a definite volume.
______ particles are tightly packed into a definite shape.
What is the physical state of water at 250°C.
