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प्रश्न
Higher Order Thinking Skills.
In the diagram given below, the circle, square and triangle represent the atoms of different elements.
Identify all combinations that represent
- molecule of a compound
- molecule of an element consisting of two atoms
- molecule of an element consisting of three atoms
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संबंधित प्रश्न
Tick the most appropriate answer
Solutions are
- heterogeneous mixtures.
- compounds
- homogeneous mixtures.
- elements
Give two examples of the following.
Non-metals which are solids
State the number of atoms of H2SO4
Find the atomicity of the Following molecule:
Dinitrogen Oxide
Fill in the blank
The most abundant element in the earth’s crust is _______.
Fill in the blank
A liquid non-metal is _______.
State what are radicals. Give the names of the radicals –
(a) NO3
(b) OH
(c) SO4
(d) CO3
Give the name of the radical - NO3
Represent with the help of a simple chart how matter is classified into pure or impure substances & further into elements, compounds & mixtures, with elements further segmented.
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 |
