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प्रश्न
State the number of atoms of each element, present in \[\ce{HNO3}\].
Also name the compound.
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उत्तर
The compound \[\ce{HNO3}\] contains 1 atom of hydrogen, 1 atom of nitrogen, and 3 atoms of oxygen; it is named nitric acid.
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संबंधित प्रश्न
Fill in the blank
A pure substance has definite.................. and constant ..............
Fill in the blank
Chalk powder dissolved in water is an example of a Chalk powder dissolved in water is an example of a _________.
Match the columns.
| column A | column B |
|
1. to separate grain from chaff |
a. filtration |
| 2. to saparate sawdust from water | b. sedimentation and deeantation |
| 3. to separate iodine from sodium chloride | c. winnowing |
| 4. to separate iron fillings from sand | d.sublimation |
|
5. it is used to separate sand and water |
e maganetic separation |
|
|
f .handpicking |
Give Two Examples for Each of the Following: Non-metals
Give two examples of Metals.
Define: Atom
Indicate whether the following statement is true or false:
A compound is made up of just one kind of atom
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 |
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
Name the process associated with the following
A fine beam of light entering through a small hole in a dark room illuminates the particles in its paths.
