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प्रश्न
Tick (√) the correct alternative from the choice given for the following statement.
All pure substances have
विकल्प
the same physical state
the same colour
the same composition
a definite set of properties
उत्तर
a definite set of properties
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संबंधित प्रश्न
Give one example for the following type of mixtures
solid-solid homogenous mixture.
Write the Chemical Name of the Following and Also Give Their Molecular Formulae:
Vinegar
Name: a Liquid Non-metal
Name: the Hardest Naturally Occurring Substance
Draw a labelled diagram of an atom including its nucleus, orbits & their contents.
Give the name of the radical - SO4
Complete the statement with the correct words.
_______ are chemicals which are hydroxide (or oxides) of ______ eg. sodium hydroxide.
Complete the statement given below by filling in the blank with the correct word.
From the elements nitrogen, chlorine, bromine, the element present in the atmosphere is ________.
Match the statements in List I – 1 to 10 correct answers in List II-A to J.
| List I | LIst II | ||
| 1 | Fluorine and chlorine | A | Nitrogen |
| 2 | A diatomic molecule | B | Boron |
| 3 | A molecule containing the elements hydrogen and oxygen. | C | Reactants |
| 4 | A metalloid - showing properties of both metals and non-metals. | D | Chemical Formula |
| 5 | The term used for the substances which take part in the chemical reaction | E | Halogens |
| 6 | The term represents a substance by means of symbols. | F | Water |
| 7 | The term used for the substances formed as a result of a chemical reaction | G | Nitric Acid |
| 8 | A compound containing one atom of zinc and two atoms of chlorine. | H | Products |
| 9 | The chemical name for nitrogen monoxide. | I | Phosphorus |
| 10 | A polyatomic molecule. | J | Zinc Chloride |
Explain the term ‘mixture’.
