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प्रश्न
Complete the statement with the correct words.
_______ are chemicals which are hydroxide (or oxides) of ______ eg. sodium hydroxide.
उत्तर
Bases – are chemicals which are hydroxide (or oxides) of metals eg. sodium hydroxide.
संबंधित प्रश्न
Give two examples for the following: Metals
Name the technique that you use if only the solid component of a solution is required.
Name the substance you will add to speed up sedimentation.
Give two examples of the following.
Elements which are liquids
Complete the statement – an element is a pure substance made up of ____________ atoms.
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.
Match the separation of components in List I with the most appropriate process in List II.
| List I | List II |
| 1. Naphthalene from naphthalene & sodium chloride. | A: Separating funnel |
| 2. Cream from milk. | B: Sublimation |
| 3. Kerosene oil from kerosene oil & water. | C: Boiling |
| 4. Lead nitrate from an aqueous solution of lead nitrate. | D: Centrifugation |
| 5. Ammonia from an aqueous solution of ammonia. | E: Distillation |
Give two example of elements.
What is the Latin name of Sodium?
