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प्रश्न
The important physical properties of substances are colour, odour, nature, density & solubility in water.
Name – a gas with a pungent, choking odour which is lighter than air
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उत्तर
A gas with a pungent, choking odour which is lighter than air is Ammonia
संबंधित प्रश्न
Fill in the blan
An ________ is a homogeneous mixture of two or more metals.
Write the Chemical Name of the Following and Also Give Their Molecular Formulae:
Marble
Name: a Metal Which is a Poor Conductor of Electricity.
Tick (√) the correct alternative from the choice given for the following statement.
All pure substances have
Tick (√) the correct alternative from the choice given for the following statement.
Atoms of different kinds combine to form molecules of
Tick (√) the correct alternative from the choice given for the following statement
A gaseous non-metal.
State four differences between – elements, compounds and mixtures with suitable examples.
Select the correct answer from A, B, C, D & E for the statement given below :
A mixture consisting of elements & a compound.
Match the following:
| 1. | Co2 | a. | Robert Boyle |
| 2. | Sulfur | b. | Making mobile phones |
| 3. | Element | c. | triatomic molecule |
| 4. | Gallium | d. | Polyatomic molecule |
Name the two elements which are derived from the country.
