Advertisements
Advertisements
प्रश्न
Classify the following as elements and compounds.
Water, Common salt, Sugar, Carbon dioxide, Iodine and Lithium
Advertisements
उत्तर
| Water | Compounds |
| Common salt | Compounds |
| Sugar | Compounds |
| Carbon dioxide | Compounds |
| Iodine | Elements |
| Iodine and Lithium | Elements |
APPEARS IN
संबंधित प्रश्न
Give two examples of the following.
Metals which are soft
Name: A form of carbon used as a gem
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.
Sand is a compound of
Tick (√) the correct alternative from the choice given for the following statement
The most ductile metal.
Complete the statement with the correct words.
Acid’s are chemicals which are _____ in taste and derived from plants and ________.
Complete the statement given below by filling in the blanks with the correct words.
Atom contains ________ , with positively charged _____.
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 |
Select the correct answer from the choice given below.
The type of molecule- bromine
The diagram represents fractional distillation for the separation of mixtures. Answer the following :
- Can two immiscible liquids be separated by this process?
- Separation of liquids by this process is based on which physical property?
- If methyl alcohol & water are to be separated, which liquid would remain in flask ‘X’ after condensation.
- Give a reason for the above answer.
- State the purpose of the fractionating column in the apparatus.
