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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.
पर्याय
Physical
Chemical
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उत्तर
Chemical
संबंधित प्रश्न
Give reasons
The odour of scent spreads in a room.
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 gases occupy space.
State the property of the following substance.
Chlorine gas has a – strong irritating odor.
Particles in solids are free to move.
Identify the state of matter based on the arrangement of the molecules.
How the matter is grouped on the basis of physical states?
The density of solid Argon is 1.6 ml at - 233°C. If the Argon atom is assumed to be sphere of radius 1.5 × 10-8 cm, then the ______ % of solid Argon is apparently occupied.
[Take : NA = 6 × 1023, Atomic mass of Ar = 40]
The composition of a sample of wustite is Fe0.93O1.0· The iron is present in the form of Fe(III) is ______%.
