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प्रश्न
Name the technique that you use if only the solid component of a solution is required.
उत्तर
Evaporation.
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संबंधित प्रश्न
Define: Compounds
Give Two Examples for Each of the Following: Inert Gases
Why is it necessary to separate the constituents of a mixture.
Write the Chemical Name of the Following and Also Give Their Molecular Formulae:
Vinegar
Name: a Non-metal Which is a Good Conductor of Electricity.
Define: Molecule
State the number of atoms of each element, present in \[\ce{HNO3}\].
Also name the compound.
Name: A form of carbon used as a gem
Name A substance used as an insulator.
Indicate whether the following statement is true or false:
All elements are artificially prepared
Tick (√) the correct alternative from the choice given for the following statement.
Atoms of different kinds combine to form molecules of
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.
An element is a pure substance which cannot be broken down by physical or _________ methods.
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 |
Write the names of elements from the following symbol:
Cd
Give a reason for the following statement:
Components in a mixture are present in varying proportions and not in a fixed proportion.
Select the correct answer from A, B, C, D & E for the statement given below :
A mixture consisting of elements & a compound.
Select the correct answer from the choice given below to complete the sentence :
An example of a monoatomic molecule is ___________.
Give a reason for the following statement :
Brass & bronze are examples of mixtures, while copper sulphate & lead nitrate are examples of compounds.
