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प्रश्न
Select the correct answer to the statement given below:
A metalloid
विकल्प
Chalk
Oxygen
Silicon
Bromine
Nitrous oxide
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उत्तर
Silicon
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संबंधित प्रश्न
Give one example for the following types of mixtures:
liquid-gas homogenous mixture
Give Two Examples for Each of the Following: Metalloids
Why is it necessary to separate the constituents of a mixture.
Name: a Metal Which is brittle
Give two examples of the following.
Metals which are soft
Give reason: A frying pan is made up of steel but its handle is made up of wood.
Find the atomicity of the Following molecule:
Calcium Chloride
Find the atomicity of the Following molecule:
Acetic Acid
Fill in the blank
A liquid non-metal is _______.
Tick (√) the correct alternative from the choice given for the following statement.
All pure substances have
Give the name of the radical - NO3
Complete the statement with the correct words.
Acid’s are chemicals which are _____ in taste and derived from plants and ________.
Select the correct answer from the choice given below.
The element which is malleable
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 |
Elements are made up of______ kinds of atoms.
Match the following.
| Atom | Building block of matter |
| Element | Atoms of different kinds |
| Compound | Atoms of the same kind |
| Molecule | Smallest unit of a substance |
Give an example of each mixture having the following characteristics. Suggest a suitable method to separate the components of this mixture
Two or more coloured constituents are soluble in some solvent.
Matter is its simplest form is called ______.
Name the constituents of water.
Reason out
Elements are called semimetals.
